[PATCH 00/10] A trial to Allwinner H3 DVFS support

[Icenowy Zheng]

This patchset is a trial for DVFS support for Allwinner H3 SoC,
considering two kinds of adjustable regulators used on H3 boards:
SY8106A I2C-controlled regulator and SY8113B regulator (controllable
by GPIO with some special designs on the board).

PATCH 1 and PATCH 2 are for the SY8106A regulator, then PATCH 3 and
PATCH 4 are for the r_i2c bus, which is used by boards with SY8106A
to communicate with the regulator.

PATCH 5 and 6 are CCU fixes for H3 DVFS.

PATCH 7 is adding new compatible strings to the cpufreq-dt driver.

PATCH 8 adds the opp-v2 table for H3 SoC (without OPPs higher than
1.008GHz).

PATCH 9 and 10 finally adds DVFS support for two boards, Orange Pi
Zero (SY8113B) and Orange Pi PC (SY8106A).

Tested on these boards mentioned.

PATCH 9 and 10 finally adds DVFS support for two boards, Orange Pi
Zero (SY8113B) and Orange Pi PC (SY8106A).

Tested on these boards mentioned.

Chen-Yu Tsai (1):
clk: sunxi-ng: h3: gate then ungate PLL CPU clk after rate change

Icenowy Zheng (4):
clk: sunxi-ng: allow set parent clock (PLL_CPUX) for CPUX clock on H3
cpufreq: dt: Add support for some new Allwinner SoCs
ARM: sun8i: h3: add operating-points-v2 table for CPU
ARM: sun8i: h2+: add SY8113B regulator used by Orange Pi Zero board

Ondrej Jirman (5):
dt-bindings: add binding for the SY8160A voltage regulator
regulator: add support for SY8106A regulator
ARM: sunxi: h3/h5: Add r_i2c pinmux node
ARM: sunxi: h3/h5: Add r_i2c I2C controller
ARM: dts: sun8i: Add SY8106A regulator to Orange Pi PC

.../bindings/regulator/sy8106a-regulator.txt | 21 +++
arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 21 +++
arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts | 19 +++
arch/arm/boot/dts/sun8i-h3.dtsi | 38 ++++-
arch/arm/boot/dts/sunxi-h3-h5.dtsi | 19 +++
drivers/clk/sunxi-ng/ccu-sun8i-h3.c | 13 +-
drivers/cpufreq/cpufreq-dt-platdev.c | 6 +
drivers/regulator/Kconfig | 8 +-
drivers/regulator/Makefile | 2 +-
drivers/regulator/sy8106a-regulator.c | 163 +++++++++++++++++++++
10 files changed, 306 insertions(+), 4 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt
create mode 100644 drivers/regulator/sy8106a-regulator.c

[Icenowy Zheng]

From: Ondrej Jirman <***@megous.com>

SY8106A is an I2C-controlled adjustable voltage regulator made by
Silergy Corp.

Add its device tree binding.

Signed-off-by: Ondrej Jirman <***@megous.com>
[Icenowy: Change commit message]
Signed-off-by: Icenowy Zheng <***@aosc.io>
---
.../bindings/regulator/sy8106a-regulator.txt | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
create mode 100644 Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt

diff --git a/Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt b/Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt
new file mode 100644
index 000000000000..1e623a34b1cb
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt
@@ -0,0 +1,21 @@
+SY8106A Voltage regulator
+
+Required properties:
+- compatible: Must be "silergy,sy8106a"
+- reg: I2C slave address - must be <0x65>
+
+Any property defined as part of the core regulator binding, defined in
+regulator.txt, can also be used.
+
+Example:
+
+ sy8106a {
+ compatible = "silergy,sy8106a";
+ reg = <0x65>;
+ regulator-name = "sy8106a-vdd";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-ramp-delay = <200>;
+ regulator-boot-on;
+ regulator-always-on;
+ };

[Chen-Yu Tsai]

Post by Icenowy Zheng
SY8106A is an I2C-controlled adjustable voltage regulator made by
Silergy Corp.
Add its device tree binding.
[Icenowy: Change commit message]
---
.../bindings/regulator/sy8106a-regulator.txt | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
create mode 100644 Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt
diff --git a/Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt b/Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt
new file mode 100644
index 000000000000..1e623a34b1cb
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/sy8106a-regulator.txt
@@ -0,0 +1,21 @@
+SY8106A Voltage regulator
+
+- compatible: Must be "silergy,sy8106a"
+- reg: I2C slave address - must be <0x65>
+
+Any property defined as part of the core regulator binding, defined in
+regulator.txt, can also be used.

Nit: use ./regulator.txt to show that this is a path, and not just a
file name. This should help other people find the file quickly.

Otherwise,

Post by Icenowy Zheng
+
+
+ sy8106a {
+ compatible = "silergy,sy8106a";
+ reg = <0x65>;
+ regulator-name = "sy8106a-vdd";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-ramp-delay = <200>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
--
2.13.0
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[Icenowy Zheng]

This post might be inappropriate. Click to display it.

[Chen-Yu Tsai]

This post might be inappropriate. Click to display it.

[i***@aosc.io]

在 2017-07-24 11:03，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by Icenowy Zheng
SY8106A is an I2C attached single output regulator made by Silergy Corp,
which is used on several Allwinner H3/H5 SBCs to control the power
supply of the ARM cores.
Add a driver for it.
[Icenowy: Change commit message]
---
drivers/regulator/Kconfig | 8 +-
drivers/regulator/Makefile | 2 +-
drivers/regulator/sy8106a-regulator.c | 163
++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+), 2 deletions(-)
create mode 100644 drivers/regulator/sy8106a-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 99b9362331b5..1efa73e18d07 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -764,6 +764,13 @@ config REGULATOR_STW481X_VMMC
This driver supports the internal VMMC regulator in the STw481x
PMIC chips.
+config REGULATOR_SY8106A
+ tristate "Silergy SY8106A regulator"
+ depends on I2C && (OF || COMPILE_TEST)
+ select REGMAP_I2C
+ help
+ This driver supports SY8106A single output regulator.
+
config REGULATOR_TPS51632
tristate "TI TPS51632 Power Regulator"
depends on I2C
@@ -938,4 +945,3 @@ config REGULATOR_WM8994
WM8994 CODEC.
endif
-
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 95b1e86ae692..f5120252f86a 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
+obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o
obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
@@ -120,5 +121,4 @@ obj-$(CONFIG_REGULATOR_WM8350) +=
wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
-
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/sy8106a-regulator.c
b/drivers/regulator/sy8106a-regulator.c
new file mode 100644
index 000000000000..1df889f68b3d
--- /dev/null
+++ b/drivers/regulator/sy8106a-regulator.c
@@ -0,0 +1,163 @@
+/*
+ * sy8106a-regulator.c - Regulator device driver for SY8106A
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define SY8106A_REG_VOUT1_SEL 0x01
+#define SY8106A_REG_VOUT_COM 0x02
+#define SY8106A_REG_VOUT1_SEL_MASK 0x7f
+#define SY8106A_DISABLE_REG BIT(0)
+#define SY8106A_GO_BIT BIT(7)
+
+struct sy8106a {
+ struct regulator_dev *rdev;
+ struct regmap *regmap;
+};
+
+static const struct regmap_config sy8106a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int sy8106a_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)
+{
+ /* We use our set_voltage_sel in order to avoid unnecessary I2C
+ * chatter, because the regulator_get_voltage_sel_regmap using
+ * apply_bit would perform 4 unnecessary transfers instead of one,
+ * increasing the chance of error.
+ */
+ return regmap_write(rdev->regmap, rdev->desc->vsel_reg,
+ sel | SY8106A_GO_BIT);

There should also be an explanation of what the "go bit" does.
In this case it enables control of the voltage over I2C.

Post by Icenowy Zheng
+}
+
+static const struct regulator_ops sy8106a_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_voltage_sel = sy8106a_set_voltage_sel,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear,

No enable/disable ops?

Post by Icenowy Zheng
+};
+
+/* Default limits measured in millivolts and milliamps */
+#define SY8106A_MIN_MV 680
+#define SY8106A_MAX_MV 1950
+#define SY8106A_STEP_MV 10
+
+static const struct regulator_desc sy8106a_reg = {
+ .name = "SY8106A",
+ .id = 0,
+ .ops = &sy8106a_ops,
+ .type = REGULATOR_VOLTAGE,
+ .n_voltages = ((SY8106A_MAX_MV - SY8106A_MIN_MV) /
SY8106A_STEP_MV) + 1,
+ .min_uV = (SY8106A_MIN_MV * 1000),
+ .uV_step = (SY8106A_STEP_MV * 1000),
+ .vsel_reg = SY8106A_REG_VOUT1_SEL,
+ .vsel_mask = SY8106A_REG_VOUT1_SEL_MASK,
+ .enable_reg = SY8106A_REG_VOUT_COM,
+ .enable_mask = SY8106A_DISABLE_REG,
+ .disable_val = SY8106A_DISABLE_REG,
+ .enable_is_inverted = 1,

As the regulator core helpers currently are, there is no way to disable

By reading the current code, I think removing the disable_val variable
will
just make it work -- when enabling, the enable_reg will be set to
disable_val
(as enable_is_inverted is 1), and disable_val is defaultly 0; when
disabling,
the enable_reg will be set to enable_mask (fallbacked from enable_val,
which
is also the default value 0), and the regulator successfully get
disabled.

Post by Chen-Yu Tsai
if (rdev->desc->enable_is_inverted) {
val = rdev->desc->enable_val;
if (!val)
val = rdev->desc->enable_mask;
} else {
val = rdev->desc->disable_val;
}
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
Note the fallback to enable_mask if enable_val is not set. The enable
helper has a similar structure. This regulator uses an enable value
of 0, and disable value of 1, it is impossible to get it right. As
it is now, it doesn't really make sense to me.
The code was introduced in ca5d1b3524b4 ("regulator: helpers: Modify
helpers enabling multi-bit control"). I wonder if it was an unintended
consequence of the change? (original author CC-ed)

Post by Icenowy Zheng
+ .owner = THIS_MODULE,
+};
+
+/*
+ * I2C driver interface functions
+ */
+static int sy8106a_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct sy8106a *chip;
+ struct device *dev = &i2c->dev;
+ struct regulator_dev *rdev = NULL;
+ struct regulator_config config = { };
+ unsigned int selector;
+ int error;
+
+ chip = devm_kzalloc(&i2c->dev, sizeof(struct sy8106a), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->regmap = devm_regmap_init_i2c(i2c,
&sy8106a_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ error = PTR_ERR(chip->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ error);
+ return error;
+ }
+
+ config.dev = &i2c->dev;
+ config.regmap = chip->regmap;
+ config.driver_data = chip;
+
+ config.of_node = dev->of_node;
+ config.init_data = of_get_regulator_init_data(dev,
dev->of_node,
+ &sy8106a_reg);
+
+ if (!config.init_data)
+ return -ENOMEM;
+
+ /* Probe regulator */
+ error = regmap_read(chip->regmap, SY8106A_REG_VOUT1_SEL, &selector);
+ if (error) {
+ dev_err(&i2c->dev, "Failed to read voltage at probe time: %d\n", error);
+ return error;
+ }
+
+ rdev = devm_regulator_register(&i2c->dev, &sy8106a_reg, &config);
+ if (IS_ERR(rdev)) {
+ error = PTR_ERR(rdev);
+ dev_err(&i2c->dev, "Failed to register SY8106A regulator: %d\n", error);
+ return error;
+ }
+
+ chip->rdev = rdev;
+
+ i2c_set_clientdata(i2c, chip);
+
+ return 0;
+}
+
+static const struct of_device_id sy8106a_i2c_of_match[] = {
+ { .compatible = "silergy,sy8106a" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sy8106a_i2c_of_match);
+
+static const struct i2c_device_id sy8106a_i2c_id[] = {
+ { "sy8106a", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sy8106a_i2c_id);
+
+static struct i2c_driver sy8106a_regulator_driver = {
+ .driver = {
+ .name = "sy8106a",
+ .of_match_table = of_match_ptr(sy8106a_i2c_of_match),
+ },
+ .probe = sy8106a_i2c_probe,
+ .id_table = sy8106a_i2c_id,
+};
+
+module_i2c_driver(sy8106a_regulator_driver);
+
+MODULE_DESCRIPTION("Regulator device driver for Silergy SY8106A");
+MODULE_LICENSE("GPL v2");

This should be "GPL", to match what the license at the very top says.
Regards
ChenYu

Post by Icenowy Zheng
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[Chen-Yu Tsai]

Post by i***@aosc.io
在 2017-07-24 11:03，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by Icenowy Zheng
SY8106A is an I2C attached single output regulator made by Silergy Corp,
which is used on several Allwinner H3/H5 SBCs to control the power
supply of the ARM cores.
Add a driver for it.
[Icenowy: Change commit message]
---
drivers/regulator/Kconfig | 8 +-
drivers/regulator/Makefile | 2 +-
drivers/regulator/sy8106a-regulator.c | 163
++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+), 2 deletions(-)
create mode 100644 drivers/regulator/sy8106a-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 99b9362331b5..1efa73e18d07 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -764,6 +764,13 @@ config REGULATOR_STW481X_VMMC
This driver supports the internal VMMC regulator in the STw481x
PMIC chips.
+config REGULATOR_SY8106A
+ tristate "Silergy SY8106A regulator"
+ depends on I2C && (OF || COMPILE_TEST)
+ select REGMAP_I2C
+ help
+ This driver supports SY8106A single output regulator.
+
config REGULATOR_TPS51632
tristate "TI TPS51632 Power Regulator"
depends on I2C
@@ -938,4 +945,3 @@ config REGULATOR_WM8994
WM8994 CODEC.
endif
-
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 95b1e86ae692..f5120252f86a 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
+obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o
obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
@@ -120,5 +121,4 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
-
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/sy8106a-regulator.c
b/drivers/regulator/sy8106a-regulator.c
new file mode 100644
index 000000000000..1df889f68b3d
--- /dev/null
+++ b/drivers/regulator/sy8106a-regulator.c
@@ -0,0 +1,163 @@
+/*
+ * sy8106a-regulator.c - Regulator device driver for SY8106A
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define SY8106A_REG_VOUT1_SEL 0x01
+#define SY8106A_REG_VOUT_COM 0x02
+#define SY8106A_REG_VOUT1_SEL_MASK 0x7f
+#define SY8106A_DISABLE_REG BIT(0)
+#define SY8106A_GO_BIT BIT(7)
+
+struct sy8106a {
+ struct regulator_dev *rdev;
+ struct regmap *regmap;
+};
+
+static const struct regmap_config sy8106a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int sy8106a_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)
+{
+ /* We use our set_voltage_sel in order to avoid unnecessary I2C
+ * chatter, because the regulator_get_voltage_sel_regmap using
+ * apply_bit would perform 4 unnecessary transfers instead of one,
+ * increasing the chance of error.
+ */
+ return regmap_write(rdev->regmap, rdev->desc->vsel_reg,
+ sel | SY8106A_GO_BIT);

There should also be an explanation of what the "go bit" does.
In this case it enables control of the voltage over I2C.

Post by Icenowy Zheng
+}
+
+static const struct regulator_ops sy8106a_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_voltage_sel = sy8106a_set_voltage_sel,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear,

No enable/disable ops?

Post by Icenowy Zheng
+};
+
+/* Default limits measured in millivolts and milliamps */
+#define SY8106A_MIN_MV 680
+#define SY8106A_MAX_MV 1950
+#define SY8106A_STEP_MV 10
+
+static const struct regulator_desc sy8106a_reg = {
+ .name = "SY8106A",
+ .id = 0,
+ .ops = &sy8106a_ops,
+ .type = REGULATOR_VOLTAGE,
+ .n_voltages = ((SY8106A_MAX_MV - SY8106A_MIN_MV) /
SY8106A_STEP_MV) + 1,
+ .min_uV = (SY8106A_MIN_MV * 1000),
+ .uV_step = (SY8106A_STEP_MV * 1000),
+ .vsel_reg = SY8106A_REG_VOUT1_SEL,
+ .vsel_mask = SY8106A_REG_VOUT1_SEL_MASK,
+ .enable_reg = SY8106A_REG_VOUT_COM,
+ .enable_mask = SY8106A_DISABLE_REG,
+ .disable_val = SY8106A_DISABLE_REG,
+ .enable_is_inverted = 1,

As the regulator core helpers currently are, there is no way to disable

By reading the current code, I think removing the disable_val variable will
just make it work -- when enabling, the enable_reg will be set to disable_val
(as enable_is_inverted is 1), and disable_val is defaultly 0; when disabling,
the enable_reg will be set to enable_mask (fallbacked from enable_val, which
is also the default value 0), and the regulator successfully get disabled.

(Gmail is wrapping the lines :( )

enable_mask is set to SY8106A_DISABLE_REG, which equals disable_val here,
which is not 0. This is correct, as it is the bit mask passed to
regmap_update_bits. So no, it does not work.

It seems quite a lot of drivers depend on this fallback behavior though.

ChenYu

Post by i***@aosc.io

Post by Chen-Yu Tsai
if (rdev->desc->enable_is_inverted) {
val = rdev->desc->enable_val;
if (!val)
val = rdev->desc->enable_mask;
} else {
val = rdev->desc->disable_val;
}
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
Note the fallback to enable_mask if enable_val is not set. The enable
helper has a similar structure. This regulator uses an enable value
of 0, and disable value of 1, it is impossible to get it right. As
it is now, it doesn't really make sense to me.
The code was introduced in ca5d1b3524b4 ("regulator: helpers: Modify
helpers enabling multi-bit control"). I wonder if it was an unintended
consequence of the change? (original author CC-ed)

Post by Icenowy Zheng
+ .owner = THIS_MODULE,
+};
+
+/*
+ * I2C driver interface functions
+ */
+static int sy8106a_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct sy8106a *chip;
+ struct device *dev = &i2c->dev;
+ struct regulator_dev *rdev = NULL;
+ struct regulator_config config = { };
+ unsigned int selector;
+ int error;
+
+ chip = devm_kzalloc(&i2c->dev, sizeof(struct sy8106a), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->regmap = devm_regmap_init_i2c(i2c, &sy8106a_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ error = PTR_ERR(chip->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ error);
+ return error;
+ }
+
+ config.dev = &i2c->dev;
+ config.regmap = chip->regmap;
+ config.driver_data = chip;
+
+ config.of_node = dev->of_node;
+ config.init_data = of_get_regulator_init_data(dev, dev->of_node,
+ &sy8106a_reg);
+
+ if (!config.init_data)
+ return -ENOMEM;
+
+ /* Probe regulator */
+ error = regmap_read(chip->regmap, SY8106A_REG_VOUT1_SEL, &selector);
+ if (error) {
%d\n", error);
+ return error;
+ }
+
+ rdev = devm_regulator_register(&i2c->dev, &sy8106a_reg, &config);
+ if (IS_ERR(rdev)) {
+ error = PTR_ERR(rdev);
%d\n", error);
+ return error;
+ }
+
+ chip->rdev = rdev;
+
+ i2c_set_clientdata(i2c, chip);
+
+ return 0;
+}
+
+static const struct of_device_id sy8106a_i2c_of_match[] = {
+ { .compatible = "silergy,sy8106a" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sy8106a_i2c_of_match);
+
+static const struct i2c_device_id sy8106a_i2c_id[] = {
+ { "sy8106a", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sy8106a_i2c_id);
+
+static struct i2c_driver sy8106a_regulator_driver = {
+ .driver = {
+ .name = "sy8106a",
+ .of_match_table = of_match_ptr(sy8106a_i2c_of_match),
+ },
+ .probe = sy8106a_i2c_probe,
+ .id_table = sy8106a_i2c_id,
+};
+
+module_i2c_driver(sy8106a_regulator_driver);
+
+MODULE_DESCRIPTION("Regulator device driver for Silergy SY8106A");
+MODULE_LICENSE("GPL v2");

This should be "GPL", to match what the license at the very top says.
Regards
ChenYu

Post by Icenowy Zheng
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[i***@aosc.io]

在 2017-07-24 11:33，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by i***@aosc.io
在 2017-07-24 11:03，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by Icenowy Zheng
SY8106A is an I2C attached single output regulator made by Silergy Corp,
which is used on several Allwinner H3/H5 SBCs to control the power
supply of the ARM cores.
Add a driver for it.
[Icenowy: Change commit message]
---
drivers/regulator/Kconfig | 8 +-
drivers/regulator/Makefile | 2 +-
drivers/regulator/sy8106a-regulator.c | 163
++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+), 2 deletions(-)
create mode 100644 drivers/regulator/sy8106a-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 99b9362331b5..1efa73e18d07 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -764,6 +764,13 @@ config REGULATOR_STW481X_VMMC
This driver supports the internal VMMC regulator in the STw481x
PMIC chips.
+config REGULATOR_SY8106A
+ tristate "Silergy SY8106A regulator"
+ depends on I2C && (OF || COMPILE_TEST)
+ select REGMAP_I2C
+ help
+ This driver supports SY8106A single output regulator.
+
config REGULATOR_TPS51632
tristate "TI TPS51632 Power Regulator"
depends on I2C
@@ -938,4 +945,3 @@ config REGULATOR_WM8994
WM8994 CODEC.
endif
-
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 95b1e86ae692..f5120252f86a 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
+obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o
obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
@@ -120,5 +121,4 @@ obj-$(CONFIG_REGULATOR_WM8350) +=
wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
-
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/sy8106a-regulator.c
b/drivers/regulator/sy8106a-regulator.c
new file mode 100644
index 000000000000..1df889f68b3d
--- /dev/null
+++ b/drivers/regulator/sy8106a-regulator.c
@@ -0,0 +1,163 @@
+/*
+ * sy8106a-regulator.c - Regulator device driver for SY8106A
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define SY8106A_REG_VOUT1_SEL 0x01
+#define SY8106A_REG_VOUT_COM 0x02
+#define SY8106A_REG_VOUT1_SEL_MASK 0x7f
+#define SY8106A_DISABLE_REG BIT(0)
+#define SY8106A_GO_BIT BIT(7)
+
+struct sy8106a {
+ struct regulator_dev *rdev;
+ struct regmap *regmap;
+};
+
+static const struct regmap_config sy8106a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int sy8106a_set_voltage_sel(struct regulator_dev *rdev,
unsigned
int sel)
+{
+ /* We use our set_voltage_sel in order to avoid unnecessary I2C
+ * chatter, because the regulator_get_voltage_sel_regmap using
+ * apply_bit would perform 4 unnecessary transfers instead
of
one,
+ * increasing the chance of error.
+ */
+ return regmap_write(rdev->regmap, rdev->desc->vsel_reg,
+ sel | SY8106A_GO_BIT);

There should also be an explanation of what the "go bit" does.
In this case it enables control of the voltage over I2C.

Post by Icenowy Zheng
+}
+
+static const struct regulator_ops sy8106a_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_voltage_sel = sy8106a_set_voltage_sel,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear,

No enable/disable ops?

Post by Icenowy Zheng
+};
+
+/* Default limits measured in millivolts and milliamps */
+#define SY8106A_MIN_MV 680
+#define SY8106A_MAX_MV 1950
+#define SY8106A_STEP_MV 10
+
+static const struct regulator_desc sy8106a_reg = {
+ .name = "SY8106A",
+ .id = 0,
+ .ops = &sy8106a_ops,
+ .type = REGULATOR_VOLTAGE,
+ .n_voltages = ((SY8106A_MAX_MV - SY8106A_MIN_MV) /
SY8106A_STEP_MV) + 1,
+ .min_uV = (SY8106A_MIN_MV * 1000),
+ .uV_step = (SY8106A_STEP_MV * 1000),
+ .vsel_reg = SY8106A_REG_VOUT1_SEL,
+ .vsel_mask = SY8106A_REG_VOUT1_SEL_MASK,
+ .enable_reg = SY8106A_REG_VOUT_COM,
+ .enable_mask = SY8106A_DISABLE_REG,
+ .disable_val = SY8106A_DISABLE_REG,
+ .enable_is_inverted = 1,

As the regulator core helpers currently are, there is no way to disable

By reading the current code, I think removing the disable_val variable will
just make it work -- when enabling, the enable_reg will be set to disable_val
(as enable_is_inverted is 1), and disable_val is defaultly 0; when disabling,
the enable_reg will be set to enable_mask (fallbacked from enable_val, which
is also the default value 0), and the regulator successfully get disabled.

(Gmail is wrapping the lines :( )
enable_mask is set to SY8106A_DISABLE_REG, which equals disable_val here,
which is not 0. This is correct, as it is the bit mask passed to
regmap_update_bits. So no, it does not work.

From my personal understanding of the code, the behavior of
enable_is_inverted
is that switch the roles of enable_val and disable_val, so if
enable_is_inverted is set, the regulator_disable_regmap function will
write
enable_val (if it's 0, fallback to enable_mask) to the register, and
regulator_enable_regmap will write disable_val.

Maybe this design is used to ensure enable_val (then fallback to
enable_mask)
is not 0.

Post by Chen-Yu Tsai
It seems quite a lot of drivers depend on this fallback behavior though.
ChenYu

Post by i***@aosc.io

Post by Chen-Yu Tsai
if (rdev->desc->enable_is_inverted) {
val = rdev->desc->enable_val;
if (!val)
val = rdev->desc->enable_mask;
} else {
val = rdev->desc->disable_val;
}
return regmap_update_bits(rdev->regmap,
rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
Note the fallback to enable_mask if enable_val is not set. The enable
helper has a similar structure. This regulator uses an enable value
of 0, and disable value of 1, it is impossible to get it right. As
it is now, it doesn't really make sense to me.
The code was introduced in ca5d1b3524b4 ("regulator: helpers: Modify
helpers enabling multi-bit control"). I wonder if it was an
unintended
consequence of the change? (original author CC-ed)

Post by Icenowy Zheng
+ .owner = THIS_MODULE,
+};
+
+/*
+ * I2C driver interface functions
+ */
+static int sy8106a_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct sy8106a *chip;
+ struct device *dev = &i2c->dev;
+ struct regulator_dev *rdev = NULL;
+ struct regulator_config config = { };
+ unsigned int selector;
+ int error;
+
+ chip = devm_kzalloc(&i2c->dev, sizeof(struct sy8106a), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->regmap = devm_regmap_init_i2c(i2c,
&sy8106a_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ error = PTR_ERR(chip->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ error);
+ return error;
+ }
+
+ config.dev = &i2c->dev;
+ config.regmap = chip->regmap;
+ config.driver_data = chip;
+
+ config.of_node = dev->of_node;
+ config.init_data = of_get_regulator_init_data(dev,
dev->of_node,
+ &sy8106a_reg);
+
+ if (!config.init_data)
+ return -ENOMEM;
+
+ /* Probe regulator */
+ error = regmap_read(chip->regmap, SY8106A_REG_VOUT1_SEL, &selector);
+ if (error) {
%d\n", error);
+ return error;
+ }
+
+ rdev = devm_regulator_register(&i2c->dev, &sy8106a_reg, &config);
+ if (IS_ERR(rdev)) {
+ error = PTR_ERR(rdev);
%d\n", error);
+ return error;
+ }
+
+ chip->rdev = rdev;
+
+ i2c_set_clientdata(i2c, chip);
+
+ return 0;
+}
+
+static const struct of_device_id sy8106a_i2c_of_match[] = {
+ { .compatible = "silergy,sy8106a" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sy8106a_i2c_of_match);
+
+static const struct i2c_device_id sy8106a_i2c_id[] = {
+ { "sy8106a", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sy8106a_i2c_id);
+
+static struct i2c_driver sy8106a_regulator_driver = {
+ .driver = {
+ .name = "sy8106a",
+ .of_match_table =
of_match_ptr(sy8106a_i2c_of_match),
+ },
+ .probe = sy8106a_i2c_probe,
+ .id_table = sy8106a_i2c_id,
+};
+
+module_i2c_driver(sy8106a_regulator_driver);
+
+MODULE_DESCRIPTION("Regulator device driver for Silergy SY8106A");
+MODULE_LICENSE("GPL v2");

This should be "GPL", to match what the license at the very top says.
Regards
ChenYu

Post by Icenowy Zheng
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[Chen-Yu Tsai]

Post by i***@aosc.io
在 2017-07-24 11:33，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by i***@aosc.io
在 2017-07-24 11:03，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by Icenowy Zheng
SY8106A is an I2C attached single output regulator made by Silergy Corp,
which is used on several Allwinner H3/H5 SBCs to control the power
supply of the ARM cores.
Add a driver for it.
[Icenowy: Change commit message]
---
drivers/regulator/Kconfig | 8 +-
drivers/regulator/Makefile | 2 +-
drivers/regulator/sy8106a-regulator.c | 163
++++++++++++++++++++++++++++++++++
3 files changed, 171 insertions(+), 2 deletions(-)
create mode 100644 drivers/regulator/sy8106a-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 99b9362331b5..1efa73e18d07 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -764,6 +764,13 @@ config REGULATOR_STW481X_VMMC
This driver supports the internal VMMC regulator in the STw481x
PMIC chips.
+config REGULATOR_SY8106A
+ tristate "Silergy SY8106A regulator"
+ depends on I2C && (OF || COMPILE_TEST)
+ select REGMAP_I2C
+ help
+ This driver supports SY8106A single output regulator.
+
config REGULATOR_TPS51632
tristate "TI TPS51632 Power Regulator"
depends on I2C
@@ -938,4 +945,3 @@ config REGULATOR_WM8994
WM8994 CODEC.
endif
-
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 95b1e86ae692..f5120252f86a 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -95,6 +95,7 @@ obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
+obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o
obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
@@ -120,5 +121,4 @@ obj-$(CONFIG_REGULATOR_WM8350) +=
wm8350-regulator.o
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
-
ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/sy8106a-regulator.c
b/drivers/regulator/sy8106a-regulator.c
new file mode 100644
index 000000000000..1df889f68b3d
--- /dev/null
+++ b/drivers/regulator/sy8106a-regulator.c
@@ -0,0 +1,163 @@
+/*
+ * sy8106a-regulator.c - Regulator device driver for SY8106A
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define SY8106A_REG_VOUT1_SEL 0x01
+#define SY8106A_REG_VOUT_COM 0x02
+#define SY8106A_REG_VOUT1_SEL_MASK 0x7f
+#define SY8106A_DISABLE_REG BIT(0)
+#define SY8106A_GO_BIT BIT(7)
+
+struct sy8106a {
+ struct regulator_dev *rdev;
+ struct regmap *regmap;
+};
+
+static const struct regmap_config sy8106a_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int sy8106a_set_voltage_sel(struct regulator_dev *rdev,
unsigned
int sel)
+{
+ /* We use our set_voltage_sel in order to avoid unnecessary I2C
+ * chatter, because the regulator_get_voltage_sel_regmap using
+ * apply_bit would perform 4 unnecessary transfers instead of one,
+ * increasing the chance of error.
+ */
+ return regmap_write(rdev->regmap, rdev->desc->vsel_reg,
+ sel | SY8106A_GO_BIT);

There should also be an explanation of what the "go bit" does.
In this case it enables control of the voltage over I2C.

Post by Icenowy Zheng
+}
+
+static const struct regulator_ops sy8106a_ops = {
+ .is_enabled = regulator_is_enabled_regmap,
+ .set_voltage_sel = sy8106a_set_voltage_sel,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .list_voltage = regulator_list_voltage_linear,

No enable/disable ops?

Post by Icenowy Zheng
+};
+
+/* Default limits measured in millivolts and milliamps */
+#define SY8106A_MIN_MV 680
+#define SY8106A_MAX_MV 1950
+#define SY8106A_STEP_MV 10
+
+static const struct regulator_desc sy8106a_reg = {
+ .name = "SY8106A",
+ .id = 0,
+ .ops = &sy8106a_ops,
+ .type = REGULATOR_VOLTAGE,
+ .n_voltages = ((SY8106A_MAX_MV - SY8106A_MIN_MV) /
SY8106A_STEP_MV) + 1,
+ .min_uV = (SY8106A_MIN_MV * 1000),
+ .uV_step = (SY8106A_STEP_MV * 1000),
+ .vsel_reg = SY8106A_REG_VOUT1_SEL,
+ .vsel_mask = SY8106A_REG_VOUT1_SEL_MASK,
+ .enable_reg = SY8106A_REG_VOUT_COM,
+ .enable_mask = SY8106A_DISABLE_REG,
+ .disable_val = SY8106A_DISABLE_REG,
+ .enable_is_inverted = 1,

As the regulator core helpers currently are, there is no way to disable

By reading the current code, I think removing the disable_val variable will
just make it work -- when enabling, the enable_reg will be set to disable_val
(as enable_is_inverted is 1), and disable_val is defaultly 0; when disabling,
the enable_reg will be set to enable_mask (fallbacked from enable_val, which
is also the default value 0), and the regulator successfully get disabled.

(Gmail is wrapping the lines :( )
enable_mask is set to SY8106A_DISABLE_REG, which equals disable_val here,
which is not 0. This is correct, as it is the bit mask passed to
regmap_update_bits. So no, it does not work.

From my personal understanding of the code, the behavior of
enable_is_inverted
is that switch the roles of enable_val and disable_val, so if
enable_is_inverted is set, the regulator_disable_regmap function will write
enable_val (if it's 0, fallback to enable_mask) to the register, and
regulator_enable_regmap will write disable_val.
Maybe this design is used to ensure enable_val (then fallback to
enable_mask)
is not 0.

I think the changes needed to the core are probably too invasive, i.e.
affect too many other drivers, to be worth doing. Especially since we
won't really be using enable/disable much, as the regulator supplies
the CPU cores.

For now, lets just remove the enable/disable related fields, and leave
a TODO note citing the possibly required changes to the core instead.
You haven't assigned the callbacks anyway.

ChenYu

Post by i***@aosc.io

Post by Chen-Yu Tsai
It seems quite a lot of drivers depend on this fallback behavior though.
ChenYu

Post by i***@aosc.io

Post by Chen-Yu Tsai
if (rdev->desc->enable_is_inverted) {
val = rdev->desc->enable_val;
if (!val)
val = rdev->desc->enable_mask;
} else {
val = rdev->desc->disable_val;
}
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask, val);
Note the fallback to enable_mask if enable_val is not set. The enable
helper has a similar structure. This regulator uses an enable value
of 0, and disable value of 1, it is impossible to get it right. As
it is now, it doesn't really make sense to me.
The code was introduced in ca5d1b3524b4 ("regulator: helpers: Modify
helpers enabling multi-bit control"). I wonder if it was an unintended
consequence of the change? (original author CC-ed)

Post by Icenowy Zheng
+ .owner = THIS_MODULE,
+};
+
+/*
+ * I2C driver interface functions
+ */
+static int sy8106a_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct sy8106a *chip;
+ struct device *dev = &i2c->dev;
+ struct regulator_dev *rdev = NULL;
+ struct regulator_config config = { };
+ unsigned int selector;
+ int error;
+
+ chip = devm_kzalloc(&i2c->dev, sizeof(struct sy8106a), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->regmap = devm_regmap_init_i2c(i2c,
&sy8106a_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ error = PTR_ERR(chip->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ error);
+ return error;
+ }
+
+ config.dev = &i2c->dev;
+ config.regmap = chip->regmap;
+ config.driver_data = chip;
+
+ config.of_node = dev->of_node;
+ config.init_data = of_get_regulator_init_data(dev,
dev->of_node,
+ &sy8106a_reg);
+
+ if (!config.init_data)
+ return -ENOMEM;
+
+ /* Probe regulator */
+ error = regmap_read(chip->regmap, SY8106A_REG_VOUT1_SEL, &selector);
+ if (error) {
%d\n", error);
+ return error;
+ }
+
+ rdev = devm_regulator_register(&i2c->dev, &sy8106a_reg, &config);
+ if (IS_ERR(rdev)) {
+ error = PTR_ERR(rdev);
%d\n", error);
+ return error;
+ }
+
+ chip->rdev = rdev;
+
+ i2c_set_clientdata(i2c, chip);
+
+ return 0;
+}
+
+static const struct of_device_id sy8106a_i2c_of_match[] = {
+ { .compatible = "silergy,sy8106a" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, sy8106a_i2c_of_match);
+
+static const struct i2c_device_id sy8106a_i2c_id[] = {
+ { "sy8106a", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, sy8106a_i2c_id);
+
+static struct i2c_driver sy8106a_regulator_driver = {
+ .driver = {
+ .name = "sy8106a",
+ .of_match_table = of_match_ptr(sy8106a_i2c_of_match),
+ },
+ .probe = sy8106a_i2c_probe,
+ .id_table = sy8106a_i2c_id,
+};
+
+module_i2c_driver(sy8106a_regulator_driver);
+
+MODULE_DESCRIPTION("Regulator device driver for Silergy SY8106A");
+MODULE_LICENSE("GPL v2");

This should be "GPL", to match what the license at the very top says.
Regards
ChenYu

Post by Icenowy Zheng
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[Mark Brown]

Post by Icenowy Zheng
SY8106A is an I2C attached single output regulator made by Silergy Corp,
which is used on several Allwinner H3/H5 SBCs to control the power
supply of the ARM cores.
Add a driver for it.

Please delete unneeded context from mails when replying. Doing this
makes it much easier to find your reply in the message, helping ensure
it won't be missed by people scrolling through the irrelevant quoted
material.

[Icenowy Zheng]

From: Ondrej Jirman <***@megous.com>

H3/H5 SoCs contain an I2C controller optionally available
on the PL0 and PL1 pins. This patch adds pinmux configuration
for this controller.

Signed-off-by: Ondrej Jirman <***@megous.com>
[Icenowy: change commit message and node name]
Signed-off-by: Icenowy Zheng <***@aosc.io>
---
arch/arm/boot/dts/sunxi-h3-h5.dtsi | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
index 6f2162608006..b240099bc865 100644
--- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
+++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
@@ -639,6 +639,11 @@
pins = "PL11";
function = "s_cir_rx";
};
+
+ r_i2c_pins: r-i2c {
+ pins = "PL0", "PL1";
+ function = "s_twi";
+ };
};
};
};

[Chen-Yu Tsai]

Post by Icenowy Zheng
H3/H5 SoCs contain an I2C controller optionally available
on the PL0 and PL1 pins. This patch adds pinmux configuration
for this controller.
[Icenowy: change commit message and node name]
---
arch/arm/boot/dts/sunxi-h3-h5.dtsi | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
index 6f2162608006..b240099bc865 100644
--- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
+++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
@@ -639,6 +639,11 @@
pins = "PL11";
function = "s_cir_rx";
};
+
+ r_i2c_pins: r-i2c {
+ pins = "PL0", "PL1";
+ function = "s_twi";

Can we fix the pinctrl driver to use standard names first? :(

ChenYu

Post by Icenowy Zheng
+ };
};
};
};
--
2.13.0
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[i***@aosc.io]

在 2017-07-24 11:07，Chen-Yu Tsai 写道：

Post by Chen-Yu Tsai

Post by Icenowy Zheng
H3/H5 SoCs contain an I2C controller optionally available
on the PL0 and PL1 pins. This patch adds pinmux configuration
for this controller.
[Icenowy: change commit message and node name]
---
arch/arm/boot/dts/sunxi-h3-h5.dtsi | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
index 6f2162608006..b240099bc865 100644
--- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
+++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
@@ -639,6 +639,11 @@
pins = "PL11";
function = "s_cir_rx";
};
+
+ r_i2c_pins: r-i2c {
+ pins = "PL0", "PL1";
+ function = "s_twi";

Can we fix the pinctrl driver to use standard names first? :(

Oh good problem.

Let me fix it.

Post by Chen-Yu Tsai
ChenYu

Post by Icenowy Zheng
+ };
};
};
};
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2.13.0
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[Icenowy Zheng]

From: Ondrej Jirman <***@megous.com>

Allwinner H3/H5 SoCs have an I2C controller at PL GPIO bank.

Add support for it in the device tree.

Signed-off-by: Ondrej Jirman <***@megous.com>
[Icenowy: Change to use r_ccu and change pinmux node name]
Signed-off-by: Icenowy Zheng <***@aosc.io>
---
arch/arm/boot/dts/sunxi-h3-h5.dtsi | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
index b240099bc865..65643c4710a3 100644
--- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
+++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
@@ -624,6 +624,20 @@
status = "disabled";
};

+ r_i2c: ***@01f02400 {
+ compatible = "allwinner,sun6i-a31-i2c";
+ reg = <0x01f02400 0x400>;
+ interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&r_i2c_pins>;
+ clocks = <&r_ccu CLK_APB0_I2C>;
+ clock-frequency = <100000>;
+ resets = <&r_ccu RST_APB0_I2C>;
+ status = "disabled";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
+
r_pio: ***@01f02c00 {
compatible = "allwinner,sun8i-h3-r-pinctrl";
reg = <0x01f02c00 0x400>;

[Chen-Yu Tsai]

Post by Icenowy Zheng
Allwinner H3/H5 SoCs have an I2C controller at PL GPIO bank.
Add support for it in the device tree.
[Icenowy: Change to use r_ccu and change pinmux node name]

Reviewed-by: Chen-Yu Tsai <***@csie.org>

[Icenowy Zheng]

From: Chen-Yu Tsai <***@csie.org>

This patch utilizes the new PLL clk notifier to gate then ungate the
PLL CPU clock after rate changes. This should prevent any system hangs
resulting from cpufreq changes to the clk.

Reported-by: Ondrej Jirman <***@megous.com>
Signed-off-by: Chen-Yu Tsai <***@csie.org>
Tested-by: Icenowy Zheng <***@aosc.io>
---
drivers/clk/sunxi-ng/ccu-sun8i-h3.c | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-h3.c b/drivers/clk/sunxi-ng/ccu-sun8i-h3.c
index 62e4f0d2b2fc..406d0aac9fd6 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-h3.c
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-h3.c
@@ -1103,6 +1103,13 @@ static const struct sunxi_ccu_desc sun50i_h5_ccu_desc = {
.num_resets = ARRAY_SIZE(sun50i_h5_ccu_resets),
};

+static struct ccu_pll_nb sun8i_h3_pll_cpu_nb = {
+ .common = &pll_cpux_clk.common,
+ /* copy from pll_cpux_clk */
+ .enable = BIT(31),
+ .lock = BIT(28),
+};
+
static struct ccu_mux_nb sun8i_h3_cpu_nb = {
.common = &cpux_clk.common,
.cm = &cpux_clk.mux,
@@ -1130,6 +1137,10 @@ static void __init sunxi_h3_h5_ccu_init(struct device_node *node,

sunxi_ccu_probe(node, reg, desc);

+ /* Gate then ungate PLL CPU after any rate changes */
+ ccu_pll_notifier_register(&sun8i_h3_pll_cpu_nb);
+
+ /* Reparent CPU during PLL CPU rate changes */
ccu_mux_notifier_register(pll_cpux_clk.common.hw.clk,
&sun8i_h3_cpu_nb);
}

[Stephen Boyd]

Post by Icenowy Zheng
This patch utilizes the new PLL clk notifier to gate then ungate the
PLL CPU clock after rate changes. This should prevent any system hangs
resulting from cpufreq changes to the clk.
---

Acked-by: Stephen Boyd <***@codeaurora.org>

[Icenowy Zheng]

Some new Allwinner SoCs get supported in the kernel after the
compatibles are added to cpufreq-dt-platdev driver.

Add their compatible strings in the cpufreq-dt-platdev driver.

Cc: "Rafael J. Wysocki" <***@rjwysocki.net>
Cc: Viresh Kumar <***@linaro.org>
Signed-off-by: Icenowy Zheng <***@aosc.io>
---
drivers/cpufreq/cpufreq-dt-platdev.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 2eb40d46d357..c3851453e84a 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -24,7 +24,11 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "allwinner,sun8i-a23", },
{ .compatible = "allwinner,sun8i-a33", },
{ .compatible = "allwinner,sun8i-a83t", },
+ { .compatible = "allwinner,sun8i-h2-plus", },
{ .compatible = "allwinner,sun8i-h3", },
+ { .compatible = "allwinner,sun8i-v3s", },
+ { .compatible = "allwinner,sun50i-a64", },
+ { .compatible = "allwinner,sun50i-h5", },

{ .compatible = "apm,xgene-shadowcat", },

@@ -43,6 +47,8 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "marvell,pxa250", },
{ .compatible = "marvell,pxa270", },

+ { .compatible = "nextthing,gr8", },
+
{ .compatible = "samsung,exynos3250", },
{ .compatible = "samsung,exynos4210", },
{ .compatible = "samsung,exynos4212", },

[Viresh Kumar]

Post by Icenowy Zheng
Some new Allwinner SoCs get supported in the kernel after the
compatibles are added to cpufreq-dt-platdev driver.
Add their compatible strings in the cpufreq-dt-platdev driver.
---
drivers/cpufreq/cpufreq-dt-platdev.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 2eb40d46d357..c3851453e84a 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -24,7 +24,11 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "allwinner,sun8i-a23", },
{ .compatible = "allwinner,sun8i-a33", },
{ .compatible = "allwinner,sun8i-a83t", },
+ { .compatible = "allwinner,sun8i-h2-plus", },
{ .compatible = "allwinner,sun8i-h3", },
+ { .compatible = "allwinner,sun8i-v3s", },
+ { .compatible = "allwinner,sun50i-a64", },
+ { .compatible = "allwinner,sun50i-h5", },
{ .compatible = "apm,xgene-shadowcat", },
@@ -43,6 +47,8 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "marvell,pxa250", },
{ .compatible = "marvell,pxa270", },
+ { .compatible = "nextthing,gr8", },
+
{ .compatible = "samsung,exynos3250", },
{ .compatible = "samsung,exynos4210", },
{ .compatible = "samsung,exynos4212", },

Acked-by: Viresh Kumar <***@linaro.org>

[Rafael J. Wysocki]

Post by Icenowy Zheng
Some new Allwinner SoCs get supported in the kernel after the
compatibles are added to cpufreq-dt-platdev driver.
Add their compatible strings in the cpufreq-dt-platdev driver.
---
drivers/cpufreq/cpufreq-dt-platdev.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 2eb40d46d357..c3851453e84a 100644
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -24,7 +24,11 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "allwinner,sun8i-a23", },
{ .compatible = "allwinner,sun8i-a33", },
{ .compatible = "allwinner,sun8i-a83t", },
+ { .compatible = "allwinner,sun8i-h2-plus", },
{ .compatible = "allwinner,sun8i-h3", },
+ { .compatible = "allwinner,sun8i-v3s", },
+ { .compatible = "allwinner,sun50i-a64", },
+ { .compatible = "allwinner,sun50i-h5", },
{ .compatible = "apm,xgene-shadowcat", },
@@ -43,6 +47,8 @@ static const struct of_device_id machines[] __initconst = {
{ .compatible = "marvell,pxa250", },
{ .compatible = "marvell,pxa270", },
+ { .compatible = "nextthing,gr8", },
+
{ .compatible = "samsung,exynos3250", },
{ .compatible = "samsung,exynos4210", },
{ .compatible = "samsung,exynos4212", },

OK

I'm assuming this will go in via arm-soc along with the rest of the series.

Thanks,
Rafael

[Icenowy Zheng]

The CPU on Allwinner H3 can do dynamic frequency scaling.

Add a DVFS table based on the one tweaked by Armbian developers, which
are proven to work stably on BSP kernels.

Frequencies higher than 1008MHz are temporarily dropped in the table, as
they may lead to over voltage on boards without proper regulator
settings or over temperature on boards with proper regulator settings.
They will be added back once regulator settings are ready and thermal
sensor driver is merged.

In order to satisfy all different regulators (SY8106A which is 50mV per
level, SY8113B which have two states: 1.1V and 1.3V, and some board with
non-tweakable regulators), all the OPPs are defined with a range which has
the target value as the minimum allowed value, and 1.3V (the highest
VDD-CPUX voltage suggested by the datasheet) as the maximum allowed value.
It's proven to work well with a board with SY8113B.

Signed-off-by: Icenowy Zheng <***@aosc.io>
---
arch/arm/boot/dts/sun8i-h3.dtsi | 38 +++++++++++++++++++++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index b36f9f423c39..a0cee17fe44b 100644
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -43,32 +43,68 @@
#include "sunxi-h3-h5.dtsi"

/ {
+ cpu0_opp_table: opp_table0 {
+ compatible = "operating-points-v2";
+ opp-shared;
+
+ ***@480000000 {
+ opp-hz = /bits/ 64 <480000000>;
+ opp-microvolt = <980000 980000 1300000>;
+ clock-latency-ns = <244144>; /* 8 32k periods */
+ };
+
+ ***@648000000 {
+ opp-hz = /bits/ 64 <816000000>;
+ opp-microvolt = <1020000 1020000 1300000>;
+ clock-latency-ns = <244144>; /* 8 32k periods */
+ };
+
+ ***@912000000 {
+ opp-hz = /bits/ 64 <960000000>;
+ opp-microvolt = <1080000 1080000 1300000>;
+ clock-latency-ns = <244144>; /* 8 32k periods */
+ };
+
+ ***@1008000000 {
+ opp-hz = /bits/ 64 <1008000000>;
+ opp-microvolt = <1140000 1140000 1300000>;
+ clock-latency-ns = <244144>; /* 8 32k periods */
+ };
+ };
+
cpus {
#address-cells = <1>;
#size-cells = <0>;

- ***@0 {
+ cpu0: ***@0 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <0>;
+ clocks = <&ccu CLK_CPUX>;
+ clock-names = "cpu";
+ operating-points-v2 = <&cpu0_opp_table>;
+ #cooling-cells = <0x2>;
};

***@1 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <1>;
+ operating-points-v2 = <&cpu0_opp_table>;
};

***@2 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <2>;
+ operating-points-v2 = <&cpu0_opp_table>;
};

***@3 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <3>;
+ operating-points-v2 = <&cpu0_opp_table>;
};
};

[Icenowy Zheng]

Orange Pi Zero board has a SY8113B regulator, which is controlled via
GPIO and capable of outputing 1.1V when the PL6 GPIO is set to output 0
or 1.3V when the PL6 GPIO is set to input or output 1, and the output is
the power supply of the ARM cores in H2+ SoC.

Add the device tree node of this regulator and set the cpu's cpu-supply
property to it.

Signed-off-by: Icenowy Zheng <***@aosc.io>
---
arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
index 6713d0f2b3f4..28b4433bd7f7 100644
--- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
@@ -94,6 +94,27 @@
reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>;
post-power-on-delay-ms = <200>;
};
+
+ reg_sy8113b: gpio-regulator {
+ compatible = "regulator-gpio";
+
+ regulator-name = "vdd-cpux";
+ regulator-type = "voltage";
+ regulator-boot-on;
+ regulator-always-on;
+ regulator-min-microvolt = <1100000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-ramp-delay = <50>; /* 4ms */
+
+ gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
+ gpios-states = <0x1>;
+ states = <1100000 0x0
+ 1300000 0x1>;
+ };
+};
+
+&cpu0 {
+ cpu-supply = <&reg_sy8113b>;
};

&ehci0 {

[Chen-Yu Tsai]

Post by Icenowy Zheng
Orange Pi Zero board has a SY8113B regulator, which is controlled via
GPIO and capable of outputing 1.1V when the PL6 GPIO is set to output 0
or 1.3V when the PL6 GPIO is set to input or output 1, and the output is
the power supply of the ARM cores in H2+ SoC.
Add the device tree node of this regulator and set the cpu's cpu-supply
property to it.
---
arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
index 6713d0f2b3f4..28b4433bd7f7 100644
--- a/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts
@@ -94,6 +94,27 @@
reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>;
post-power-on-delay-ms = <200>;
};
+
+ reg_sy8113b: gpio-regulator {
+ compatible = "regulator-gpio";
+

No need for the newline.

Post by Icenowy Zheng
+ regulator-name = "vdd-cpux";
+ regulator-type = "voltage";
+ regulator-boot-on;
+ regulator-always-on;
+ regulator-min-microvolt = <1100000>;
+ regulator-max-microvolt = <1300000>;
+ regulator-ramp-delay = <50>; /* 4ms */

You should also add "enable-active-high". The driver might not
honor the GPIO_ACTIVE_HIGH flag. AFAIK this was a problem with
the old GPIO API.

ChenYu

Post by Icenowy Zheng
+
+ gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
+ gpios-states = <0x1>;
+ states = <1100000 0x0
+ 1300000 0x1>;
+ };
+};
+
+&cpu0 {
+ cpu-supply = <&reg_sy8113b>;
};
&ehci0 {
--
2.13.0
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[Icenowy Zheng]

From: Ondrej Jirman <***@megous.com>

Add SY8106A regulator to r_i2c bus and enable the r_i2c bus on
Orange Pi PC, then set the power supply of the ARM cores to this
regulator, in order to enable DVFS.

Signed-off-by: Ondrej Jirman <***@megous.com>
[Icenowy: Enable DVFS in this patch, slight changes and change commit
message]
Signed-off-by: Icenowy Zheng <***@aosc.io>
---
arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
index 998b60f8d295..d855f8b6254e 100644
--- a/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
+++ b/arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts
@@ -98,6 +98,10 @@
status = "okay";
};

+&cpu0 {
+ cpu-supply = <&reg_sy8106a>;
+};
+
&ehci0 {
status = "okay";
};
@@ -160,6 +164,21 @@
};
};

+&r_i2c {
+ status = "okay";
+
+ reg_sy8106a: ***@65 {
+ compatible = "silergy,sy8106a";
+ reg = <0x65>;
+ regulator-name = "vdd-cpux";
+ regulator-min-microvolt = <1000000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-ramp-delay = <200>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+};
+
&r_pio {
leds_r_opc: ***@0 {
pins = "PL10";

[Icenowy Zheng]

The CPUX clock, which is the main clock of the ARM core on Allwinner H3,
can be adjusted by changing the frequency of the PLL_CPUX clock.

Allowing setting parent clock for the CPUX clock, thus the PLL_CPUX
clock can be adjusted when adjusting the CPUX clock.

Signed-off-by: Icenowy Zheng <***@aosc.io>
---
drivers/clk/sunxi-ng/ccu-sun8i-h3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-h3.c b/drivers/clk/sunxi-ng/ccu-sun8i-h3.c
index 406d0aac9fd6..4cdbc88f2783 100644
--- a/drivers/clk/sunxi-ng/ccu-sun8i-h3.c
+++ b/drivers/clk/sunxi-ng/ccu-sun8i-h3.c
@@ -135,7 +135,7 @@ static SUNXI_CCU_NM_WITH_FRAC_GATE_LOCK(pll_de_clk, "pll-de",
static const char * const cpux_parents[] = { "osc32k", "osc24M",
"pll-cpux" , "pll-cpux" };
static SUNXI_CCU_MUX(cpux_clk, "cpux", cpux_parents,
- 0x050, 16, 2, CLK_IS_CRITICAL);
+ 0x050, 16, 2, CLK_IS_CRITICAL | CLK_SET_RATE_PARENT);

static SUNXI_CCU_M(axi_clk, "axi", "cpux", 0x050, 0, 2, 0);

[Chen-Yu Tsai]

Post by Icenowy Zheng
The CPUX clock, which is the main clock of the ARM core on Allwinner H3,
can be adjusted by changing the frequency of the PLL_CPUX clock.
Allowing setting parent clock for the CPUX clock, thus the PLL_CPUX
clock can be adjusted when adjusting the CPUX clock.

Fixes: 0577e4853bfb ("clk: sunxi-ng: Add H3 clocks")
Reviewed-by: Chen-Yu Tsai <***@csie.org>

[Stephen Boyd]

Post by Icenowy Zheng
The CPUX clock, which is the main clock of the ARM core on Allwinner H3,
can be adjusted by changing the frequency of the PLL_CPUX clock.
Allowing setting parent clock for the CPUX clock, thus the PLL_CPUX
clock can be adjusted when adjusting the CPUX clock.
---

Acked-by: Stephen Boyd <***@codeaurora.org>