* [PATCH v5 01/14] dt-bindings: leds: Document TI LM3533 LED controller
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:13 ` sashiko-bot
2026-06-17 8:00 ` [PATCH v5 02/14] mfd: lm3533: Remove driver specific regmap wrappers Svyatoslav Ryhel
` (12 subsequent siblings)
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Document the LM3533 - a complete power source for backlight, keypad and
indicator LEDs in smartphone handsets. The high-voltage inductive boost
converter provides the power for two series LED strings display backlight
and keypad functions.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Jonathan Cameron <jic23@kernel.org> #for light sensor
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org> #for backlight
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
.../leds/backlight/ti,lm3533-backlight.yaml | 69 +++++++
.../bindings/leds/ti,lm3533-leds.yaml | 67 +++++++
.../devicetree/bindings/leds/ti,lm3533.yaml | 169 ++++++++++++++++++
3 files changed, 305 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml
create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml
create mode 100644 Documentation/devicetree/bindings/leds/ti,lm3533.yaml
diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml
new file mode 100644
index 000000000000..a25846e9b375
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/ti,lm3533-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3533 high voltage series LED strings
+
+description:
+ This is part of the TI LM3533 MFD device. It represents two high voltage series
+ LED strings for display backlight controlled by the TI LM3533.
+
+maintainers:
+ - Svyatoslav Ryhel <clamor95@gmail.com>
+
+allOf:
+ - $ref: /schemas/leds/backlight/common.yaml#
+
+properties:
+ compatible:
+ const: ti,lm3533-backlight
+
+ reg:
+ description: Control bank selection (0 = bank A, 1 = bank B).
+ maximum: 1
+
+ led-max-microamp:
+ description: maximum current in uA with a 800 uA step.
+ minimum: 5000
+ maximum: 29800
+ default: 5000
+
+ led-sources:
+ description: |
+ HVLED strings associated with this control bank:
+ 0 - HVLED1
+ 1 - HVLED2
+ minItems: 1
+ maxItems: 2
+ items:
+ maximum: 1
+
+ ti,pwm-config-mask:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Control Bank PWM Configuration Register mask that allows to configure
+ PWM input in Zones 0-4
+ BIT(0) - PWM Input is enabled
+ BIT(1) - PWM Input is enabled in Zone 0
+ BIT(2) - PWM Input is enabled in Zone 1
+ BIT(3) - PWM Input is enabled in Zone 2
+ BIT(4) - PWM Input is enabled in Zone 3
+ BIT(5) - PWM Input is enabled in Zone 4
+ default: 0
+
+ ti,linear-mapping-mode:
+ description:
+ Enable linear mapping mode. If disabled, then it will use exponential
+ mapping mode in which the ramp up/down appears to have a more uniform
+ transition to the human eye.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+# see ti,lm3533.yaml for an example
diff --git a/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml b/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml
new file mode 100644
index 000000000000..d8dbefef3323
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/ti,lm3533-leds.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3533 low voltage control banks for individual LEDs
+
+description:
+ This is part of the TI LM3533 MFD device. It represents four low voltage
+ control banks for individual LEDs provided by the TI LM3533.
+
+maintainers:
+ - Svyatoslav Ryhel <clamor95@gmail.com>
+
+allOf:
+ - $ref: /schemas/leds/common.yaml#
+
+properties:
+ compatible:
+ const: ti,lm3533-leds
+
+ reg:
+ description:
+ Control bank selection (2 = bank C, 3 = bank D, 4 = bank E, 5 = bank F).
+ minimum: 2
+ maximum: 5
+
+ led-max-microamp:
+ description: maximum current in uA with a 800 uA step.
+ minimum: 5000
+ maximum: 29800
+ default: 5000
+
+ led-sources:
+ description: |
+ LVLED associated with this control bank. May be more than 1 source per bank.
+ 0 - LVLED1
+ 1 - LVLED2
+ 2 - LVLED3
+ 3 - LVLED4
+ 4 - LVLED5
+ minItems: 1
+ maxItems: 5
+ items:
+ maximum: 4
+
+ ti,pwm-config-mask:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ Control Bank PWM Configuration Register mask that allows to configure
+ PWM input in Zones 0-4
+ BIT(0) - PWM Input is enabled
+ BIT(1) - PWM Input is enabled in Zone 0
+ BIT(2) - PWM Input is enabled in Zone 1
+ BIT(3) - PWM Input is enabled in Zone 2
+ BIT(4) - PWM Input is enabled in Zone 3
+ BIT(5) - PWM Input is enabled in Zone 4
+ default: 0
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+# see ti,lm3533.yaml for an example
diff --git a/Documentation/devicetree/bindings/leds/ti,lm3533.yaml b/Documentation/devicetree/bindings/leds/ti,lm3533.yaml
new file mode 100644
index 000000000000..bdc05a9f3d66
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/ti,lm3533.yaml
@@ -0,0 +1,169 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/ti,lm3533.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3533 Complete Lighting Power Solution
+
+description: >
+ The LM3533 is a complete power source for backlight, keypad, and indicator LEDs
+ in smartphone handsets. The high-voltage inductive boost converter provides the
+ power for two high voltage series LED strings for display backlight and four low
+ voltage control banks for individual LEDs. Additionally, LM3533 features an
+ interface for an external light sensor.
+
+ https://www.ti.com/product/LM3533
+
+maintainers:
+ - Svyatoslav Ryhel <clamor95@gmail.com>
+
+properties:
+ compatible:
+ const: ti,lm3533
+
+ reg:
+ maxItems: 1
+
+ enable-gpios:
+ description: GPIO connected to the HWEN pin.
+ maxItems: 1
+
+ vin-supply:
+ description: Supply connected to the IN line (2.7 V to 5.5 V).
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ ti,boost-ovp-microvolt:
+ description: boost OVP select (16V, 24V, 32V, 40V)
+ enum: [ 16000000, 24000000, 32000000, 40000000 ]
+ default: 16000000
+
+ ti,boost-freq-hz:
+ description: boost frequency select (500KHz or 1MHz)
+ enum: [ 500000, 1000000 ]
+ default: 500000
+
+ light-sensor:
+ type: object
+ additionalProperties: false
+
+ properties:
+ compatible:
+ const: ti,lm3533-als
+
+ interrupts:
+ maxItems: 1
+
+ ti,resistor-ohms:
+ description:
+ Internal configuration resistor value when light sensor is in
+ Analog Sensor mode and PWM mode is disabled. The expectation is
+ the input is a current from the external analog light sensor and
+ this is used to convert it to a voltage within the target range.
+ minimum: 1575
+ maximum: 200000
+
+ ti,pwm-mode:
+ type: boolean
+ description:
+ Switch for mode in which light sensor interface is running. If
+ this property is set then the light sensor interface is running
+ in PWM mode, internal resistor value is set to high-impedance (0)
+ and ti,resistor-ohms property is ignored.
+
+ required:
+ - compatible
+
+ oneOf:
+ - required:
+ - ti,resistor-ohms
+ - required:
+ - ti,pwm-mode
+
+patternProperties:
+ "^backlight@[01]$":
+ $ref: /schemas/leds/backlight/ti,lm3533-backlight.yaml#
+
+ "^led@[2-5]$":
+ $ref: /schemas/leds/ti,lm3533-leds.yaml#
+
+required:
+ - compatible
+ - reg
+ - '#address-cells'
+ - '#size-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@36 {
+ compatible = "ti,lm3533";
+ reg = <0x36>;
+
+ enable-gpios = <&gpio 110 GPIO_ACTIVE_HIGH>;
+ vin-supply = <&vdd_3v3_bat>;
+
+ ti,boost-ovp-microvolt = <24000000>;
+ ti,boost-freq-hz = <500000>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ backlight@0 {
+ compatible = "ti,lm3533-backlight";
+ reg = <0>;
+
+ default-brightness = <113>;
+
+ led-max-microamp = <23400>;
+ led-sources = <0 1>;
+ };
+
+ led@2 {
+ compatible = "ti,lm3533-leds";
+ reg = <2>;
+
+ led-max-microamp = <23400>;
+ led-sources = <0 1>;
+ };
+
+ led@4 {
+ compatible = "ti,lm3533-leds";
+ reg = <4>;
+
+ led-max-microamp = <23400>;
+ led-sources = <2>;
+ };
+
+ led@5 {
+ compatible = "ti,lm3533-leds";
+ reg = <5>;
+
+ led-max-microamp = <23400>;
+ led-sources = <3 4>;
+ };
+
+ light-sensor {
+ compatible = "ti,lm3533-als";
+
+ interrupt-parent = <&gpio>;
+ interrupts = <80 IRQ_TYPE_LEVEL_LOW>;
+
+ ti,pwm-mode;
+ };
+ };
+ };
+...
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 01/14] dt-bindings: leds: Document TI LM3533 LED controller
2026-06-17 8:00 ` [PATCH v5 01/14] dt-bindings: leds: Document TI LM3533 LED controller Svyatoslav Ryhel
@ 2026-06-17 8:13 ` sashiko-bot
0 siblings, 0 replies; 22+ messages in thread
From: sashiko-bot @ 2026-06-17 8:13 UTC (permalink / raw)
To: Svyatoslav Ryhel; +Cc: conor+dt, dri-devel, devicetree, robh
Thank you for your contribution! Sashiko AI review found 2 potential issue(s) to consider:
- [Low] DT Schema Validation Failure due to strict property restrictions.
- [Low] Ineffective Schema Constraints on `reg` property array.
--
commit 69694c121b5fef16f95b87bbf30e28ee4fb13044
Author: Svyatoslav Ryhel <clamor95@gmail.com>
dt-bindings: leds: Document TI LM3533 LED controller
Document the LM3533 - a complete power source for backlight, keypad and
indicator LEDs in smartphone handsets.
> diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml
> new file mode 100644
> index 0000000000000..a25846e9b3752
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3533-backlight.yaml
[ ... ]
> +properties:
> + compatible:
> + const: ti,lm3533-backlight
> +
> + reg:
> + description: Control bank selection (0 = bank A, 1 = bank B).
> + maximum: 1
[Severity: Low]
Are these constraints effective? In Device Tree JSON representations, reg is
decoded as an array of arrays of integers (cells).
Numeric validation keywords like maximum are silently ignored when applied
directly to arrays instead of being nested under items.
[ ... ]
> diff --git a/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml b/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml
> new file mode 100644
> index 0000000000000..d8dbefef3323e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/ti,lm3533-leds.yaml
[ ... ]
> +properties:
> + compatible:
> + const: ti,lm3533-leds
> +
> + reg:
> + description:
> + Control bank selection (2 = bank C, 3 = bank D, 4 = bank E, 5 = bank F).
> + minimum: 2
> + maximum: 5
[Severity: Low]
Similar to the reg property in the backlight binding, should these numeric
constraints be nested under items? As written, they apply to the array itself
and will be ignored during schema validation.
[ ... ]
> diff --git a/Documentation/devicetree/bindings/leds/ti,lm3533.yaml b/Documentation/devicetree/bindings/leds/ti,lm3533.yaml
> new file mode 100644
> index 0000000000000..bdc05a9f3d663
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/ti,lm3533.yaml
[ ... ]
> + light-sensor:
> + type: object
> + additionalProperties: false
> +
> + properties:
> + compatible:
> + const: ti,lm3533-als
[ ... ]
> +examples:
> + - |
[ ... ]
> + light-sensor {
> + compatible = "ti,lm3533-als";
> +
> + interrupt-parent = <&gpio>;
> + interrupts = <80 IRQ_TYPE_LEVEL_LOW>;
[Severity: Low]
Will this fail make dt_binding_check? The light-sensor definition uses
additionalProperties: false but doesn't explicitly list interrupt-parent
in its properties block.
Since the example uses interrupt-parent, it seems this will cause a schema
validation failure. Should the schema include interrupt-parent: true, or
perhaps drop additionalProperties: false?
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260617080031.99156-1-clamor95@gmail.com?part=1
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 02/14] mfd: lm3533: Remove driver specific regmap wrappers
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 01/14] dt-bindings: leds: Document TI LM3533 LED controller Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 10:32 ` Andy Shevchenko
2026-06-17 8:00 ` [PATCH v5 03/14] mfd: lm3533: Remove extern from shared functions in the header Svyatoslav Ryhel
` (11 subsequent siblings)
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Remove driver-specific regmap wrappers in favor of using regmap helpers
directly.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/iio/light/lm3533-als.c | 79 +++++++++++++----------------
drivers/leds/leds-lm3533.c | 62 ++++++++--------------
drivers/mfd/lm3533-core.c | 73 ++++----------------------
drivers/mfd/lm3533-ctrlbank.c | 28 +++++-----
drivers/video/backlight/lm3533_bl.c | 37 +++++---------
include/linux/mfd/lm3533.h | 15 ++----
6 files changed, 100 insertions(+), 194 deletions(-)
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
index 99f0b903018c..44b104c2d77f 100644
--- a/drivers/iio/light/lm3533-als.c
+++ b/drivers/iio/light/lm3533-als.c
@@ -17,6 +17,7 @@
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
@@ -64,7 +65,7 @@ static int lm3533_als_get_adc(struct iio_dev *indio_dev, bool average,
{
struct lm3533_als *als = iio_priv(indio_dev);
u8 reg;
- u8 val;
+ u32 val;
int ret;
if (average)
@@ -72,7 +73,7 @@ static int lm3533_als_get_adc(struct iio_dev *indio_dev, bool average,
else
reg = LM3533_REG_ALS_READ_ADC_RAW;
- ret = lm3533_read(als->lm3533, reg, &val);
+ ret = regmap_read(als->lm3533->regmap, reg, &val);
if (ret) {
dev_err(&indio_dev->dev, "failed to read adc\n");
return ret;
@@ -86,10 +87,10 @@ static int lm3533_als_get_adc(struct iio_dev *indio_dev, bool average,
static int _lm3533_als_get_zone(struct iio_dev *indio_dev, u8 *zone)
{
struct lm3533_als *als = iio_priv(indio_dev);
- u8 val;
+ u32 val;
int ret;
- ret = lm3533_read(als->lm3533, LM3533_REG_ALS_ZONE_INFO, &val);
+ ret = regmap_read(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO, &val);
if (ret) {
dev_err(&indio_dev->dev, "failed to read zone\n");
return ret;
@@ -127,7 +128,7 @@ static inline u8 lm3533_als_get_target_reg(unsigned channel, unsigned zone)
}
static int lm3533_als_get_target(struct iio_dev *indio_dev, unsigned channel,
- unsigned zone, u8 *val)
+ unsigned zone, u32 *val)
{
struct lm3533_als *als = iio_priv(indio_dev);
u8 reg;
@@ -140,7 +141,7 @@ static int lm3533_als_get_target(struct iio_dev *indio_dev, unsigned channel,
return -EINVAL;
reg = lm3533_als_get_target_reg(channel, zone);
- ret = lm3533_read(als->lm3533, reg, val);
+ ret = regmap_read(als->lm3533->regmap, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to get target current\n");
@@ -161,7 +162,7 @@ static int lm3533_als_set_target(struct iio_dev *indio_dev, unsigned channel,
return -EINVAL;
reg = lm3533_als_get_target_reg(channel, zone);
- ret = lm3533_write(als->lm3533, reg, val);
+ ret = regmap_write(als->lm3533->regmap, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to set target current\n");
@@ -171,8 +172,8 @@ static int lm3533_als_set_target(struct iio_dev *indio_dev, unsigned channel,
static int lm3533_als_get_current(struct iio_dev *indio_dev, unsigned channel,
int *val)
{
+ u32 target;
u8 zone;
- u8 target;
int ret;
ret = lm3533_als_get_zone(indio_dev, &zone);
@@ -271,16 +272,10 @@ static irqreturn_t lm3533_als_isr(int irq, void *dev_id)
static int lm3533_als_set_int_mode(struct iio_dev *indio_dev, int enable)
{
struct lm3533_als *als = iio_priv(indio_dev);
- u8 mask = LM3533_ALS_INT_ENABLE_MASK;
- u8 val;
int ret;
- if (enable)
- val = mask;
- else
- val = 0;
-
- ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, val, mask);
+ ret = regmap_assign_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO,
+ LM3533_ALS_INT_ENABLE_MASK, enable);
if (ret) {
dev_err(&indio_dev->dev, "failed to set int mode %d\n",
enable);
@@ -293,17 +288,16 @@ static int lm3533_als_set_int_mode(struct iio_dev *indio_dev, int enable)
static int lm3533_als_get_int_mode(struct iio_dev *indio_dev, int *enable)
{
struct lm3533_als *als = iio_priv(indio_dev);
- u8 mask = LM3533_ALS_INT_ENABLE_MASK;
- u8 val;
int ret;
- ret = lm3533_read(als->lm3533, LM3533_REG_ALS_ZONE_INFO, &val);
- if (ret) {
+ ret = regmap_test_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO,
+ LM3533_ALS_INT_ENABLE_MASK);
+ if (ret < 0) {
dev_err(&indio_dev->dev, "failed to get int mode\n");
return ret;
}
- *enable = !!(val & mask);
+ *enable = ret;
return 0;
}
@@ -316,7 +310,7 @@ static inline u8 lm3533_als_get_threshold_reg(unsigned nr, bool raising)
}
static int lm3533_als_get_threshold(struct iio_dev *indio_dev, unsigned nr,
- bool raising, u8 *val)
+ bool raising, u32 *val)
{
struct lm3533_als *als = iio_priv(indio_dev);
u8 reg;
@@ -326,7 +320,7 @@ static int lm3533_als_get_threshold(struct iio_dev *indio_dev, unsigned nr,
return -EINVAL;
reg = lm3533_als_get_threshold_reg(nr, raising);
- ret = lm3533_read(als->lm3533, reg, val);
+ ret = regmap_read(als->lm3533->regmap, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to get threshold\n");
@@ -337,8 +331,8 @@ static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
bool raising, u8 val)
{
struct lm3533_als *als = iio_priv(indio_dev);
- u8 val2;
u8 reg, reg2;
+ u32 val2;
int ret;
if (nr > LM3533_ALS_THRESH_MAX)
@@ -348,7 +342,7 @@ static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
reg2 = lm3533_als_get_threshold_reg(nr, !raising);
mutex_lock(&als->thresh_mutex);
- ret = lm3533_read(als->lm3533, reg2, &val2);
+ ret = regmap_read(als->lm3533->regmap, reg2, &val2);
if (ret) {
dev_err(&indio_dev->dev, "failed to get threshold\n");
goto out;
@@ -363,7 +357,7 @@ static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
goto out;
}
- ret = lm3533_write(als->lm3533, reg, val);
+ ret = regmap_write(als->lm3533->regmap, reg, val);
if (ret) {
dev_err(&indio_dev->dev, "failed to set threshold\n");
goto out;
@@ -375,11 +369,11 @@ static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
}
static int lm3533_als_get_hysteresis(struct iio_dev *indio_dev, unsigned nr,
- u8 *val)
+ u32 *val)
{
struct lm3533_als *als = iio_priv(indio_dev);
- u8 falling;
- u8 raising;
+ u32 falling;
+ u32 raising;
int ret;
if (nr > LM3533_ALS_THRESH_MAX)
@@ -503,7 +497,7 @@ static ssize_t show_als_attr(struct device *dev,
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct lm3533_als_attribute *als_attr = to_lm3533_als_attr(attr);
- u8 val;
+ u32 val;
int ret;
switch (als_attr->type) {
@@ -716,16 +710,10 @@ static const struct attribute_group lm3533_als_attribute_group = {
static int lm3533_als_set_input_mode(struct lm3533_als *als, bool pwm_mode)
{
- u8 mask = LM3533_ALS_INPUT_MODE_MASK;
- u8 val;
int ret;
- if (pwm_mode)
- val = mask; /* pwm input */
- else
- val = 0; /* analog input */
-
- ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, val, mask);
+ ret = regmap_assign_bits(als->lm3533->regmap, LM3533_REG_ALS_CONF,
+ LM3533_ALS_INPUT_MODE_MASK, pwm_mode);
if (ret) {
dev_err(&als->pdev->dev, "failed to set input mode %d\n",
pwm_mode);
@@ -744,7 +732,8 @@ static int lm3533_als_set_resistor(struct lm3533_als *als, u8 val)
return -EINVAL;
}
- ret = lm3533_write(als->lm3533, LM3533_REG_ALS_RESISTOR_SELECT, val);
+ ret = regmap_write(als->lm3533->regmap, LM3533_REG_ALS_RESISTOR_SELECT,
+ val);
if (ret) {
dev_err(&als->pdev->dev, "failed to set resistor\n");
return ret;
@@ -774,11 +763,11 @@ static int lm3533_als_setup(struct lm3533_als *als,
static int lm3533_als_setup_irq(struct lm3533_als *als, void *dev)
{
- u8 mask = LM3533_ALS_INT_ENABLE_MASK;
int ret;
/* Make sure interrupts are disabled. */
- ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, 0, mask);
+ ret = regmap_clear_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO,
+ LM3533_ALS_INT_ENABLE_MASK);
if (ret) {
dev_err(&als->pdev->dev, "failed to disable interrupts\n");
return ret;
@@ -798,10 +787,10 @@ static int lm3533_als_setup_irq(struct lm3533_als *als, void *dev)
static int lm3533_als_enable(struct lm3533_als *als)
{
- u8 mask = LM3533_ALS_ENABLE_MASK;
int ret;
- ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, mask, mask);
+ ret = regmap_set_bits(als->lm3533->regmap, LM3533_REG_ALS_CONF,
+ LM3533_ALS_ENABLE_MASK);
if (ret)
dev_err(&als->pdev->dev, "failed to enable ALS\n");
@@ -810,10 +799,10 @@ static int lm3533_als_enable(struct lm3533_als *als)
static int lm3533_als_disable(struct lm3533_als *als)
{
- u8 mask = LM3533_ALS_ENABLE_MASK;
int ret;
- ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, 0, mask);
+ ret = regmap_clear_bits(als->lm3533->regmap, LM3533_REG_ALS_CONF,
+ LM3533_ALS_ENABLE_MASK);
if (ret)
dev_err(&als->pdev->dev, "failed to disable ALS\n");
diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
index 45795f2a1042..335c758071f3 100644
--- a/drivers/leds/leds-lm3533.c
+++ b/drivers/leds/leds-lm3533.c
@@ -12,6 +12,7 @@
#include <linux/mfd/core.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/mfd/lm3533.h>
@@ -80,7 +81,6 @@ static inline u8 lm3533_led_get_pattern_reg(struct lm3533_led *led,
static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable)
{
u8 mask;
- u8 val;
int pattern;
int state;
int ret = 0;
@@ -96,12 +96,8 @@ static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable)
pattern = lm3533_led_get_pattern(led);
mask = 1 << (2 * pattern);
- if (enable)
- val = mask;
- else
- val = 0;
-
- ret = lm3533_update(led->lm3533, LM3533_REG_PATTERN_ENABLE, val, mask);
+ ret = regmap_assign_bits(led->lm3533->regmap,
+ LM3533_REG_PATTERN_ENABLE, mask, enable);
if (ret) {
dev_err(led->cdev.dev, "failed to enable pattern %d (%d)\n",
pattern, enable);
@@ -131,7 +127,7 @@ static int lm3533_led_set(struct led_classdev *cdev,
static enum led_brightness lm3533_led_get(struct led_classdev *cdev)
{
struct lm3533_led *led = to_lm3533_led(cdev);
- u8 val;
+ u32 val;
int ret;
ret = lm3533_ctrlbank_get_brightness(&led->cb, &val);
@@ -259,7 +255,7 @@ static u8 lm3533_led_delay_set(struct lm3533_led *led, u8 base,
dev_dbg(led->cdev.dev, "%s - %lu: %u (0x%02x)\n", __func__,
*delay, t, val);
reg = lm3533_led_get_pattern_reg(led, base);
- ret = lm3533_write(led->lm3533, reg, val);
+ ret = regmap_write(led->lm3533->regmap, reg, val);
if (ret)
dev_err(led->cdev.dev, "failed to set delay (%02x)\n", reg);
@@ -337,10 +333,10 @@ static ssize_t show_risefalltime(struct device *dev,
struct lm3533_led *led = to_lm3533_led(led_cdev);
ssize_t ret;
u8 reg;
- u8 val;
+ u32 val;
reg = lm3533_led_get_pattern_reg(led, base);
- ret = lm3533_read(led->lm3533, reg, &val);
+ ret = regmap_read(led->lm3533->regmap, reg, &val);
if (ret)
return ret;
@@ -375,7 +371,7 @@ static ssize_t store_risefalltime(struct device *dev,
return -EINVAL;
reg = lm3533_led_get_pattern_reg(led, base);
- ret = lm3533_write(led->lm3533, reg, val);
+ ret = regmap_write(led->lm3533->regmap, reg, val);
if (ret)
return ret;
@@ -405,11 +401,11 @@ static ssize_t show_als_channel(struct device *dev,
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned channel;
u8 reg;
- u8 val;
+ u32 val;
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = lm3533_read(led->lm3533, reg, &val);
+ ret = regmap_read(led->lm3533->regmap, reg, &val);
if (ret)
return ret;
@@ -441,7 +437,7 @@ static ssize_t store_als_channel(struct device *dev,
mask = LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK;
val = channel - 1;
- ret = lm3533_update(led->lm3533, reg, val, mask);
+ ret = regmap_update_bits(led->lm3533->regmap, reg, mask, val);
if (ret)
return ret;
@@ -455,11 +451,11 @@ static ssize_t show_als_en(struct device *dev,
struct lm3533_led *led = to_lm3533_led(led_cdev);
bool enable;
u8 reg;
- u8 val;
+ u32 val;
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = lm3533_read(led->lm3533, reg, &val);
+ ret = regmap_read(led->lm3533->regmap, reg, &val);
if (ret)
return ret;
@@ -476,22 +472,15 @@ static ssize_t store_als_en(struct device *dev,
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned enable;
u8 reg;
- u8 mask;
- u8 val;
int ret;
if (kstrtouint(buf, 0, &enable))
return -EINVAL;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- mask = LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK;
- if (enable)
- val = mask;
- else
- val = 0;
-
- ret = lm3533_update(led->lm3533, reg, val, mask);
+ ret = regmap_assign_bits(led->lm3533->regmap, reg,
+ LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK, enable);
if (ret)
return ret;
@@ -504,12 +493,12 @@ static ssize_t show_linear(struct device *dev,
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
u8 reg;
- u8 val;
+ u32 val;
int linear;
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = lm3533_read(led->lm3533, reg, &val);
+ ret = regmap_read(led->lm3533->regmap, reg, &val);
if (ret)
return ret;
@@ -529,22 +518,15 @@ static ssize_t store_linear(struct device *dev,
struct lm3533_led *led = to_lm3533_led(led_cdev);
unsigned long linear;
u8 reg;
- u8 mask;
- u8 val;
int ret;
if (kstrtoul(buf, 0, &linear))
return -EINVAL;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- mask = LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK;
- if (linear)
- val = mask;
- else
- val = 0;
-
- ret = lm3533_update(led->lm3533, reg, val, mask);
+ ret = regmap_assign_bits(led->lm3533->regmap, reg,
+ LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK, linear);
if (ret)
return ret;
@@ -557,7 +539,7 @@ static ssize_t show_pwm(struct device *dev,
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
- u8 val;
+ u32 val;
int ret;
ret = lm3533_ctrlbank_get_pwm(&led->cb, &val);
@@ -573,10 +555,10 @@ static ssize_t store_pwm(struct device *dev,
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
struct lm3533_led *led = to_lm3533_led(led_cdev);
- u8 val;
+ u32 val;
int ret;
- if (kstrtou8(buf, 0, &val))
+ if (kstrtou32(buf, 0, &val))
return -EINVAL;
ret = lm3533_ctrlbank_set_pwm(&led->cb, val);
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index 0a2409d00b2e..f9bdc0a1d9be 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -80,66 +80,14 @@ static struct mfd_cell lm3533_led_devs[] = {
},
};
-int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
-{
- int tmp;
- int ret;
-
- ret = regmap_read(lm3533->regmap, reg, &tmp);
- if (ret < 0) {
- dev_err(lm3533->dev, "failed to read register %02x: %d\n",
- reg, ret);
- return ret;
- }
-
- *val = tmp;
-
- dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(lm3533_read);
-
-int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
-{
- int ret;
-
- dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
-
- ret = regmap_write(lm3533->regmap, reg, val);
- if (ret < 0) {
- dev_err(lm3533->dev, "failed to write register %02x: %d\n",
- reg, ret);
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(lm3533_write);
-
-int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
-{
- int ret;
-
- dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
-
- ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
- if (ret < 0) {
- dev_err(lm3533->dev, "failed to update register %02x: %d\n",
- reg, ret);
- }
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(lm3533_update);
-
static int lm3533_set_boost_freq(struct lm3533 *lm3533,
enum lm3533_boost_freq freq)
{
int ret;
- ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
- freq << LM3533_BOOST_FREQ_SHIFT,
- LM3533_BOOST_FREQ_MASK);
+ ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
+ LM3533_BOOST_FREQ_MASK,
+ freq << LM3533_BOOST_FREQ_SHIFT);
if (ret)
dev_err(lm3533->dev, "failed to set boost frequency\n");
@@ -152,9 +100,9 @@ static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
{
int ret;
- ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
- ovp << LM3533_BOOST_OVP_SHIFT,
- LM3533_BOOST_OVP_MASK);
+ ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
+ LM3533_BOOST_OVP_MASK,
+ ovp << LM3533_BOOST_OVP_SHIFT);
if (ret)
dev_err(lm3533->dev, "failed to set boost ovp\n");
@@ -181,7 +129,8 @@ static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
mask = LM3533_BL_ID_MASK << shift;
val = bl << shift;
- ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
+ ret = regmap_update_bits(lm3533->regmap, LM3533_REG_OUTPUT_CONF1,
+ mask, val);
if (ret)
dev_err(lm3533->dev, "failed to set hvled config\n");
@@ -216,7 +165,7 @@ static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
mask = LM3533_LED_ID_MASK << shift;
val = led << shift;
- ret = lm3533_update(lm3533, reg, val, mask);
+ ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
if (ret)
dev_err(lm3533->dev, "failed to set lvled config\n");
@@ -258,7 +207,7 @@ static ssize_t show_output(struct device *dev,
struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
int id = lattr->u.output.id;
u8 reg;
- u8 val;
+ u32 val;
u8 mask;
int shift;
int ret;
@@ -278,7 +227,7 @@ static ssize_t show_output(struct device *dev,
mask = LM3533_LED_ID_MASK << shift;
}
- ret = lm3533_read(lm3533, reg, &val);
+ ret = regmap_read(lm3533->regmap, reg, &val);
if (ret)
return ret;
diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c
index 2537dfade51c..c2b5fd38b81d 100644
--- a/drivers/mfd/lm3533-ctrlbank.c
+++ b/drivers/mfd/lm3533-ctrlbank.c
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/module.h>
+#include <linux/regmap.h>
#include <linux/mfd/lm3533.h>
@@ -38,8 +39,8 @@ int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
mask = 1 << cb->id;
- ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE,
- mask, mask);
+ ret = regmap_set_bits(cb->lm3533->regmap, LM3533_REG_CTRLBANK_ENABLE,
+ mask);
if (ret)
dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);
@@ -55,7 +56,8 @@ int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
mask = 1 << cb->id;
- ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask);
+ ret = regmap_clear_bits(cb->lm3533->regmap, LM3533_REG_CTRLBANK_ENABLE,
+ mask);
if (ret)
dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);
@@ -68,7 +70,7 @@ EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable);
*
* imax 5000 - 29800 uA (800 uA step)
*/
-int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
+int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u32 imax)
{
u8 reg;
u8 val;
@@ -80,7 +82,7 @@ int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
- ret = lm3533_write(cb->lm3533, reg, val);
+ ret = regmap_write(cb->lm3533->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to set max current\n");
@@ -88,13 +90,13 @@ int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u16 imax)
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_max_current);
-int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val)
+int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u32 val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
- ret = lm3533_write(cb->lm3533, reg, val);
+ ret = regmap_write(cb->lm3533->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to set brightness\n");
@@ -102,13 +104,13 @@ int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val)
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_brightness);
-int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val)
+int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u32 *val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
- ret = lm3533_read(cb->lm3533, reg, val);
+ ret = regmap_read(cb->lm3533->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to get brightness\n");
@@ -126,7 +128,7 @@ EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_brightness);
* bit 1 - PWM-input enabled in Zone 0
* bit 0 - PWM-input enabled
*/
-int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
+int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u32 val)
{
u8 reg;
int ret;
@@ -135,7 +137,7 @@ int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
return -EINVAL;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
- ret = lm3533_write(cb->lm3533, reg, val);
+ ret = regmap_write(cb->lm3533->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to set PWM mask\n");
@@ -143,13 +145,13 @@ int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val)
}
EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_pwm);
-int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val)
+int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u32 *val)
{
u8 reg;
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
- ret = lm3533_read(cb->lm3533, reg, val);
+ ret = regmap_read(cb->lm3533->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to get PWM mask\n");
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index babfd3ceec86..cd21c64b6485 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -11,6 +11,7 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/mfd/lm3533.h>
@@ -45,7 +46,7 @@ static int lm3533_bl_update_status(struct backlight_device *bd)
static int lm3533_bl_get_brightness(struct backlight_device *bd)
{
struct lm3533_bl *bl = bl_get_data(bd);
- u8 val;
+ u32 val;
int ret;
ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val);
@@ -82,12 +83,12 @@ static ssize_t show_als_en(struct device *dev,
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
- u8 val;
+ u32 val;
u8 mask;
bool enable;
int ret;
- ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
+ ret = regmap_read(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
if (ret)
return ret;
@@ -104,7 +105,6 @@ static ssize_t store_als_en(struct device *dev,
struct lm3533_bl *bl = dev_get_drvdata(dev);
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
int enable;
- u8 val;
u8 mask;
int ret;
@@ -113,13 +113,8 @@ static ssize_t store_als_en(struct device *dev,
mask = 1 << (2 * ctrlbank);
- if (enable)
- val = mask;
- else
- val = 0;
-
- ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
- mask);
+ ret = regmap_assign_bits(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ mask, enable);
if (ret)
return ret;
@@ -130,12 +125,12 @@ static ssize_t show_linear(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
- u8 val;
+ u32 val;
u8 mask;
int linear;
int ret;
- ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val);
+ ret = regmap_read(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
if (ret)
return ret;
@@ -156,7 +151,6 @@ static ssize_t store_linear(struct device *dev,
struct lm3533_bl *bl = dev_get_drvdata(dev);
unsigned long linear;
u8 mask;
- u8 val;
int ret;
if (kstrtoul(buf, 0, &linear))
@@ -164,13 +158,8 @@ static ssize_t store_linear(struct device *dev,
mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
- if (linear)
- val = mask;
- else
- val = 0;
-
- ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val,
- mask);
+ ret = regmap_assign_bits(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ mask, linear);
if (ret)
return ret;
@@ -182,7 +171,7 @@ static ssize_t show_pwm(struct device *dev,
char *buf)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
- u8 val;
+ u32 val;
int ret;
ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val);
@@ -197,10 +186,10 @@ static ssize_t store_pwm(struct device *dev,
const char *buf, size_t len)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
- u8 val;
+ u32 val;
int ret;
- if (kstrtou8(buf, 0, &val))
+ if (kstrtou32(buf, 0, &val))
return -EINVAL;
ret = lm3533_ctrlbank_set_pwm(&bl->cb, val);
diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h
index 69059a7a2ce5..3463b164d0c1 100644
--- a/include/linux/mfd/lm3533.h
+++ b/include/linux/mfd/lm3533.h
@@ -85,15 +85,10 @@ struct lm3533_platform_data {
extern int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb);
extern int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
-extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val);
-extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val);
-extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb,
- u16 imax);
-extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val);
-extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val);
-
-extern int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val);
-extern int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val);
-extern int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask);
+extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u32 val);
+extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u32 *val);
+extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u32 imax);
+extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u32 val);
+extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u32 *val);
#endif /* __LINUX_MFD_LM3533_H */
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 02/14] mfd: lm3533: Remove driver specific regmap wrappers
2026-06-17 8:00 ` [PATCH v5 02/14] mfd: lm3533: Remove driver specific regmap wrappers Svyatoslav Ryhel
@ 2026-06-17 10:32 ` Andy Shevchenko
0 siblings, 0 replies; 22+ messages in thread
From: Andy Shevchenko @ 2026-06-17 10:32 UTC (permalink / raw)
To: Svyatoslav Ryhel
Cc: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
On Wed, Jun 17, 2026 at 11:00:19AM +0300, Svyatoslav Ryhel wrote:
> Remove driver-specific regmap wrappers in favor of using regmap helpers
> directly.
OK, let's go with this variant.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Some side notes below for the record.
...
> struct lm3533_led *led = to_lm3533_led(led_cdev);
> unsigned enable;
Oh, besides using the old way of declaring unsigned int, it most likely
just needs to be kstrtobool().
> u8 reg;
> - u8 mask;
> - u8 val;
> int ret;
>
> if (kstrtouint(buf, 0, &enable))
> return -EINVAL;
We should unshadow error codes (it may return more than -EINVAL).
> reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
> - mask = LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK;
>
> - if (enable)
> - val = mask;
> - else
> - val = 0;
> -
...
> - if (kstrtou8(buf, 0, &val))
> + if (kstrtou32(buf, 0, &val))
> return -EINVAL;
Like in the previous case we should unshadow error codes.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 03/14] mfd: lm3533: Remove extern from shared functions in the header
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 01/14] dt-bindings: leds: Document TI LM3533 LED controller Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 02/14] mfd: lm3533: Remove driver specific regmap wrappers Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 04/14] mfd: lm3533: Pass only regmap and light sensor presence to child devices Svyatoslav Ryhel
` (10 subsequent siblings)
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Using 'extern' is not required, drop them.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
---
include/linux/mfd/lm3533.h | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h
index 3463b164d0c1..c4c38876c09b 100644
--- a/include/linux/mfd/lm3533.h
+++ b/include/linux/mfd/lm3533.h
@@ -82,13 +82,13 @@ struct lm3533_platform_data {
int num_leds;
};
-extern int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb);
-extern int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
-
-extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u32 val);
-extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u32 *val);
-extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u32 imax);
-extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u32 val);
-extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u32 *val);
+int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb);
+int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
+
+int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u32 val);
+int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u32 *val);
+int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u32 imax);
+int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u32 val);
+int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u32 *val);
#endif /* __LINUX_MFD_LM3533_H */
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 04/14] mfd: lm3533: Pass only regmap and light sensor presence to child devices
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (2 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 03/14] mfd: lm3533: Remove extern from shared functions in the header Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 05/14] iio: light: lm3533-als: Remove redundant pdata helpers Svyatoslav Ryhel
` (9 subsequent siblings)
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Instead of passing the entire lm3533 core data structure, only pass the
regmap and the light sensor presence flag to child devices.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/iio/light/lm3533-als.c | 32 ++++++++++++++---------------
drivers/leds/leds-lm3533.c | 32 ++++++++++++++++-------------
drivers/mfd/lm3533-ctrlbank.c | 14 ++++++-------
drivers/video/backlight/lm3533_bl.c | 19 +++++++++--------
include/linux/mfd/lm3533.h | 2 +-
5 files changed, 53 insertions(+), 46 deletions(-)
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
index 44b104c2d77f..a9af8e2b965f 100644
--- a/drivers/iio/light/lm3533-als.c
+++ b/drivers/iio/light/lm3533-als.c
@@ -49,7 +49,7 @@
struct lm3533_als {
- struct lm3533 *lm3533;
+ struct regmap *regmap;
struct platform_device *pdev;
unsigned long flags;
@@ -73,7 +73,7 @@ static int lm3533_als_get_adc(struct iio_dev *indio_dev, bool average,
else
reg = LM3533_REG_ALS_READ_ADC_RAW;
- ret = regmap_read(als->lm3533->regmap, reg, &val);
+ ret = regmap_read(als->regmap, reg, &val);
if (ret) {
dev_err(&indio_dev->dev, "failed to read adc\n");
return ret;
@@ -90,7 +90,7 @@ static int _lm3533_als_get_zone(struct iio_dev *indio_dev, u8 *zone)
u32 val;
int ret;
- ret = regmap_read(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO, &val);
+ ret = regmap_read(als->regmap, LM3533_REG_ALS_ZONE_INFO, &val);
if (ret) {
dev_err(&indio_dev->dev, "failed to read zone\n");
return ret;
@@ -141,7 +141,7 @@ static int lm3533_als_get_target(struct iio_dev *indio_dev, unsigned channel,
return -EINVAL;
reg = lm3533_als_get_target_reg(channel, zone);
- ret = regmap_read(als->lm3533->regmap, reg, val);
+ ret = regmap_read(als->regmap, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to get target current\n");
@@ -162,7 +162,7 @@ static int lm3533_als_set_target(struct iio_dev *indio_dev, unsigned channel,
return -EINVAL;
reg = lm3533_als_get_target_reg(channel, zone);
- ret = regmap_write(als->lm3533->regmap, reg, val);
+ ret = regmap_write(als->regmap, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to set target current\n");
@@ -274,7 +274,7 @@ static int lm3533_als_set_int_mode(struct iio_dev *indio_dev, int enable)
struct lm3533_als *als = iio_priv(indio_dev);
int ret;
- ret = regmap_assign_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO,
+ ret = regmap_assign_bits(als->regmap, LM3533_REG_ALS_ZONE_INFO,
LM3533_ALS_INT_ENABLE_MASK, enable);
if (ret) {
dev_err(&indio_dev->dev, "failed to set int mode %d\n",
@@ -290,7 +290,7 @@ static int lm3533_als_get_int_mode(struct iio_dev *indio_dev, int *enable)
struct lm3533_als *als = iio_priv(indio_dev);
int ret;
- ret = regmap_test_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO,
+ ret = regmap_test_bits(als->regmap, LM3533_REG_ALS_ZONE_INFO,
LM3533_ALS_INT_ENABLE_MASK);
if (ret < 0) {
dev_err(&indio_dev->dev, "failed to get int mode\n");
@@ -320,7 +320,7 @@ static int lm3533_als_get_threshold(struct iio_dev *indio_dev, unsigned nr,
return -EINVAL;
reg = lm3533_als_get_threshold_reg(nr, raising);
- ret = regmap_read(als->lm3533->regmap, reg, val);
+ ret = regmap_read(als->regmap, reg, val);
if (ret)
dev_err(&indio_dev->dev, "failed to get threshold\n");
@@ -342,7 +342,7 @@ static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
reg2 = lm3533_als_get_threshold_reg(nr, !raising);
mutex_lock(&als->thresh_mutex);
- ret = regmap_read(als->lm3533->regmap, reg2, &val2);
+ ret = regmap_read(als->regmap, reg2, &val2);
if (ret) {
dev_err(&indio_dev->dev, "failed to get threshold\n");
goto out;
@@ -357,7 +357,7 @@ static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
goto out;
}
- ret = regmap_write(als->lm3533->regmap, reg, val);
+ ret = regmap_write(als->regmap, reg, val);
if (ret) {
dev_err(&indio_dev->dev, "failed to set threshold\n");
goto out;
@@ -712,7 +712,7 @@ static int lm3533_als_set_input_mode(struct lm3533_als *als, bool pwm_mode)
{
int ret;
- ret = regmap_assign_bits(als->lm3533->regmap, LM3533_REG_ALS_CONF,
+ ret = regmap_assign_bits(als->regmap, LM3533_REG_ALS_CONF,
LM3533_ALS_INPUT_MODE_MASK, pwm_mode);
if (ret) {
dev_err(&als->pdev->dev, "failed to set input mode %d\n",
@@ -732,7 +732,7 @@ static int lm3533_als_set_resistor(struct lm3533_als *als, u8 val)
return -EINVAL;
}
- ret = regmap_write(als->lm3533->regmap, LM3533_REG_ALS_RESISTOR_SELECT,
+ ret = regmap_write(als->regmap, LM3533_REG_ALS_RESISTOR_SELECT,
val);
if (ret) {
dev_err(&als->pdev->dev, "failed to set resistor\n");
@@ -766,7 +766,7 @@ static int lm3533_als_setup_irq(struct lm3533_als *als, void *dev)
int ret;
/* Make sure interrupts are disabled. */
- ret = regmap_clear_bits(als->lm3533->regmap, LM3533_REG_ALS_ZONE_INFO,
+ ret = regmap_clear_bits(als->regmap, LM3533_REG_ALS_ZONE_INFO,
LM3533_ALS_INT_ENABLE_MASK);
if (ret) {
dev_err(&als->pdev->dev, "failed to disable interrupts\n");
@@ -789,7 +789,7 @@ static int lm3533_als_enable(struct lm3533_als *als)
{
int ret;
- ret = regmap_set_bits(als->lm3533->regmap, LM3533_REG_ALS_CONF,
+ ret = regmap_set_bits(als->regmap, LM3533_REG_ALS_CONF,
LM3533_ALS_ENABLE_MASK);
if (ret)
dev_err(&als->pdev->dev, "failed to enable ALS\n");
@@ -801,7 +801,7 @@ static int lm3533_als_disable(struct lm3533_als *als)
{
int ret;
- ret = regmap_clear_bits(als->lm3533->regmap, LM3533_REG_ALS_CONF,
+ ret = regmap_clear_bits(als->regmap, LM3533_REG_ALS_CONF,
LM3533_ALS_ENABLE_MASK);
if (ret)
dev_err(&als->pdev->dev, "failed to disable ALS\n");
@@ -845,7 +845,7 @@ static int lm3533_als_probe(struct platform_device *pdev)
indio_dev->modes = INDIO_DIRECT_MODE;
als = iio_priv(indio_dev);
- als->lm3533 = lm3533;
+ als->regmap = lm3533->regmap;
als->pdev = pdev;
als->irq = lm3533->irq;
atomic_set(&als->zone, 0);
diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
index 335c758071f3..0cb0585eb960 100644
--- a/drivers/leds/leds-lm3533.c
+++ b/drivers/leds/leds-lm3533.c
@@ -42,13 +42,15 @@
struct lm3533_led {
- struct lm3533 *lm3533;
+ struct regmap *regmap;
struct lm3533_ctrlbank cb;
struct led_classdev cdev;
int id;
struct mutex mutex;
unsigned long flags;
+
+ bool have_als;
};
@@ -96,7 +98,7 @@ static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable)
pattern = lm3533_led_get_pattern(led);
mask = 1 << (2 * pattern);
- ret = regmap_assign_bits(led->lm3533->regmap,
+ ret = regmap_assign_bits(led->regmap,
LM3533_REG_PATTERN_ENABLE, mask, enable);
if (ret) {
dev_err(led->cdev.dev, "failed to enable pattern %d (%d)\n",
@@ -255,7 +257,7 @@ static u8 lm3533_led_delay_set(struct lm3533_led *led, u8 base,
dev_dbg(led->cdev.dev, "%s - %lu: %u (0x%02x)\n", __func__,
*delay, t, val);
reg = lm3533_led_get_pattern_reg(led, base);
- ret = regmap_write(led->lm3533->regmap, reg, val);
+ ret = regmap_write(led->regmap, reg, val);
if (ret)
dev_err(led->cdev.dev, "failed to set delay (%02x)\n", reg);
@@ -336,7 +338,7 @@ static ssize_t show_risefalltime(struct device *dev,
u32 val;
reg = lm3533_led_get_pattern_reg(led, base);
- ret = regmap_read(led->lm3533->regmap, reg, &val);
+ ret = regmap_read(led->regmap, reg, &val);
if (ret)
return ret;
@@ -371,7 +373,7 @@ static ssize_t store_risefalltime(struct device *dev,
return -EINVAL;
reg = lm3533_led_get_pattern_reg(led, base);
- ret = regmap_write(led->lm3533->regmap, reg, val);
+ ret = regmap_write(led->regmap, reg, val);
if (ret)
return ret;
@@ -405,7 +407,7 @@ static ssize_t show_als_channel(struct device *dev,
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = regmap_read(led->lm3533->regmap, reg, &val);
+ ret = regmap_read(led->regmap, reg, &val);
if (ret)
return ret;
@@ -437,7 +439,7 @@ static ssize_t store_als_channel(struct device *dev,
mask = LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK;
val = channel - 1;
- ret = regmap_update_bits(led->lm3533->regmap, reg, mask, val);
+ ret = regmap_update_bits(led->regmap, reg, mask, val);
if (ret)
return ret;
@@ -455,7 +457,7 @@ static ssize_t show_als_en(struct device *dev,
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = regmap_read(led->lm3533->regmap, reg, &val);
+ ret = regmap_read(led->regmap, reg, &val);
if (ret)
return ret;
@@ -479,7 +481,7 @@ static ssize_t store_als_en(struct device *dev,
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = regmap_assign_bits(led->lm3533->regmap, reg,
+ ret = regmap_assign_bits(led->regmap, reg,
LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK, enable);
if (ret)
return ret;
@@ -498,7 +500,7 @@ static ssize_t show_linear(struct device *dev,
int ret;
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = regmap_read(led->lm3533->regmap, reg, &val);
+ ret = regmap_read(led->regmap, reg, &val);
if (ret)
return ret;
@@ -525,7 +527,7 @@ static ssize_t store_linear(struct device *dev,
reg = lm3533_led_get_lv_reg(led, LM3533_REG_CTRLBANK_BCONF_BASE);
- ret = regmap_assign_bits(led->lm3533->regmap, reg,
+ ret = regmap_assign_bits(led->regmap, reg,
LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK, linear);
if (ret)
return ret;
@@ -597,7 +599,7 @@ static umode_t lm3533_led_attr_is_visible(struct kobject *kobj,
if (attr == &dev_attr_als_channel.attr ||
attr == &dev_attr_als_en.attr) {
- if (!led->lm3533->have_als)
+ if (!led->have_als)
mode = 0;
}
@@ -654,7 +656,9 @@ static int lm3533_led_probe(struct platform_device *pdev)
if (!led)
return -ENOMEM;
- led->lm3533 = lm3533;
+ led->regmap = lm3533->regmap;
+ led->have_als = lm3533->have_als;
+
led->cdev.name = pdata->name;
led->cdev.default_trigger = pdata->default_trigger;
led->cdev.brightness_set_blocking = lm3533_led_set;
@@ -670,7 +674,7 @@ static int lm3533_led_probe(struct platform_device *pdev)
* registration so use parent device (for error reporting) until
* registered.
*/
- led->cb.lm3533 = lm3533;
+ led->cb.regmap = lm3533->regmap;
led->cb.id = lm3533_led_get_ctrlbank_id(led);
led->cb.dev = lm3533->dev;
diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c
index c2b5fd38b81d..91e13cfa3cf0 100644
--- a/drivers/mfd/lm3533-ctrlbank.c
+++ b/drivers/mfd/lm3533-ctrlbank.c
@@ -39,7 +39,7 @@ int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb)
dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
mask = 1 << cb->id;
- ret = regmap_set_bits(cb->lm3533->regmap, LM3533_REG_CTRLBANK_ENABLE,
+ ret = regmap_set_bits(cb->regmap, LM3533_REG_CTRLBANK_ENABLE,
mask);
if (ret)
dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id);
@@ -56,7 +56,7 @@ int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb)
dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id);
mask = 1 << cb->id;
- ret = regmap_clear_bits(cb->lm3533->regmap, LM3533_REG_CTRLBANK_ENABLE,
+ ret = regmap_clear_bits(cb->regmap, LM3533_REG_CTRLBANK_ENABLE,
mask);
if (ret)
dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id);
@@ -82,7 +82,7 @@ int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u32 imax)
val = (imax - LM3533_MAX_CURRENT_MIN) / LM3533_MAX_CURRENT_STEP;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_MAX_CURRENT_BASE);
- ret = regmap_write(cb->lm3533->regmap, reg, val);
+ ret = regmap_write(cb->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to set max current\n");
@@ -96,7 +96,7 @@ int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u32 val)
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
- ret = regmap_write(cb->lm3533->regmap, reg, val);
+ ret = regmap_write(cb->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to set brightness\n");
@@ -110,7 +110,7 @@ int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u32 *val)
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_BRIGHTNESS_BASE);
- ret = regmap_read(cb->lm3533->regmap, reg, val);
+ ret = regmap_read(cb->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to get brightness\n");
@@ -137,7 +137,7 @@ int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u32 val)
return -EINVAL;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
- ret = regmap_write(cb->lm3533->regmap, reg, val);
+ ret = regmap_write(cb->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to set PWM mask\n");
@@ -151,7 +151,7 @@ int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u32 *val)
int ret;
reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_PWM_BASE);
- ret = regmap_read(cb->lm3533->regmap, reg, val);
+ ret = regmap_read(cb->regmap, reg, val);
if (ret)
dev_err(cb->dev, "failed to get PWM mask\n");
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index cd21c64b6485..4d6f68033480 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -24,10 +24,12 @@
struct lm3533_bl {
- struct lm3533 *lm3533;
+ struct regmap *regmap;
struct lm3533_ctrlbank cb;
struct backlight_device *bd;
int id;
+
+ bool have_als;
};
@@ -88,7 +90,7 @@ static ssize_t show_als_en(struct device *dev,
bool enable;
int ret;
- ret = regmap_read(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
+ ret = regmap_read(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
if (ret)
return ret;
@@ -113,7 +115,7 @@ static ssize_t store_als_en(struct device *dev,
mask = 1 << (2 * ctrlbank);
- ret = regmap_assign_bits(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
mask, enable);
if (ret)
return ret;
@@ -130,7 +132,7 @@ static ssize_t show_linear(struct device *dev,
int linear;
int ret;
- ret = regmap_read(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
+ ret = regmap_read(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
if (ret)
return ret;
@@ -158,7 +160,7 @@ static ssize_t store_linear(struct device *dev,
mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
- ret = regmap_assign_bits(bl->lm3533->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
mask, linear);
if (ret)
return ret;
@@ -223,7 +225,7 @@ static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj,
if (attr == &dev_attr_als_channel.attr ||
attr == &dev_attr_als_en.attr) {
- if (!bl->lm3533->have_als)
+ if (!bl->have_als)
mode = 0;
}
@@ -277,10 +279,11 @@ static int lm3533_bl_probe(struct platform_device *pdev)
if (!bl)
return -ENOMEM;
- bl->lm3533 = lm3533;
+ bl->regmap = lm3533->regmap;
+ bl->have_als = lm3533->have_als;
bl->id = pdev->id;
- bl->cb.lm3533 = lm3533;
+ bl->cb.regmap = lm3533->regmap;
bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
bl->cb.dev = NULL; /* until registered */
diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h
index c4c38876c09b..74cfb52c3bd1 100644
--- a/include/linux/mfd/lm3533.h
+++ b/include/linux/mfd/lm3533.h
@@ -33,7 +33,7 @@ struct lm3533 {
};
struct lm3533_ctrlbank {
- struct lm3533 *lm3533;
+ struct regmap *regmap;
struct device *dev;
int id;
};
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 05/14] iio: light: lm3533-als: Remove redundant pdata helpers
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (3 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 04/14] mfd: lm3533: Pass only regmap and light sensor presence to child devices Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 06/14] mfd: lm3533-core: " Svyatoslav Ryhel
` (8 subsequent siblings)
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
The lm3533_als_set_input_mode() and lm3533_als_set_resistor() functions
are used only in lm3533_als_setup(). Incorporate their code into
lm3533_als_setup() directly to simplify driver readability.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/iio/light/lm3533-als.c | 56 ++++++++++------------------------
1 file changed, 16 insertions(+), 40 deletions(-)
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
index a9af8e2b965f..69bac1b202f1 100644
--- a/drivers/iio/light/lm3533-als.c
+++ b/drivers/iio/light/lm3533-als.c
@@ -708,55 +708,31 @@ static const struct attribute_group lm3533_als_attribute_group = {
.attrs = lm3533_als_attributes
};
-static int lm3533_als_set_input_mode(struct lm3533_als *als, bool pwm_mode)
+static int lm3533_als_setup(struct lm3533_als *als,
+ const struct lm3533_als_platform_data *pdata)
{
+ struct device *dev = &als->pdev->dev;
int ret;
ret = regmap_assign_bits(als->regmap, LM3533_REG_ALS_CONF,
- LM3533_ALS_INPUT_MODE_MASK, pwm_mode);
- if (ret) {
- dev_err(&als->pdev->dev, "failed to set input mode %d\n",
- pwm_mode);
- return ret;
- }
-
- return 0;
-}
+ LM3533_ALS_INPUT_MODE_MASK, pdata->pwm_mode);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to set input mode %d\n",
+ pdata->pwm_mode);
-static int lm3533_als_set_resistor(struct lm3533_als *als, u8 val)
-{
- int ret;
+ /* Bail out when in PWM-mode */
+ if (pdata->pwm_mode)
+ return 0;
- if (val < LM3533_ALS_RESISTOR_MIN || val > LM3533_ALS_RESISTOR_MAX) {
- dev_err(&als->pdev->dev, "invalid resistor value\n");
- return -EINVAL;
- }
+ if (pdata->r_select < LM3533_ALS_RESISTOR_MIN ||
+ pdata->r_select > LM3533_ALS_RESISTOR_MAX)
+ return dev_err_probe(dev, -EINVAL,
+ "invalid resistor value\n");
ret = regmap_write(als->regmap, LM3533_REG_ALS_RESISTOR_SELECT,
- val);
- if (ret) {
- dev_err(&als->pdev->dev, "failed to set resistor\n");
- return ret;
- }
-
- return 0;
-}
-
-static int lm3533_als_setup(struct lm3533_als *als,
- const struct lm3533_als_platform_data *pdata)
-{
- int ret;
-
- ret = lm3533_als_set_input_mode(als, pdata->pwm_mode);
+ pdata->r_select);
if (ret)
- return ret;
-
- /* ALS input is always high impedance in PWM-mode. */
- if (!pdata->pwm_mode) {
- ret = lm3533_als_set_resistor(als, pdata->r_select);
- if (ret)
- return ret;
- }
+ return dev_err_probe(dev, ret, "failed to set resistor\n");
return 0;
}
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 06/14] mfd: lm3533-core: Remove redundant pdata helpers
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (4 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 05/14] iio: light: lm3533-als: Remove redundant pdata helpers Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 07/14] mfd: lm3533: Use dev_groups in struct device_driver Svyatoslav Ryhel
` (7 subsequent siblings)
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
The lm3533_set_boost_freq() and lm3533_set_boost_ovp() functions are used
only in lm3533_device_setup(), which in turn is only called by
lm3533_device_init(). Incorporate their code directly into
lm3533_device_init() to simplify driver readability.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/mfd/lm3533-core.c | 57 ++++++++++-----------------------------
1 file changed, 14 insertions(+), 43 deletions(-)
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index f9bdc0a1d9be..45e7f7481aa0 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -80,35 +80,6 @@ static struct mfd_cell lm3533_led_devs[] = {
},
};
-static int lm3533_set_boost_freq(struct lm3533 *lm3533,
- enum lm3533_boost_freq freq)
-{
- int ret;
-
- ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
- LM3533_BOOST_FREQ_MASK,
- freq << LM3533_BOOST_FREQ_SHIFT);
- if (ret)
- dev_err(lm3533->dev, "failed to set boost frequency\n");
-
- return ret;
-}
-
-
-static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
- enum lm3533_boost_ovp ovp)
-{
- int ret;
-
- ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
- LM3533_BOOST_OVP_MASK,
- ovp << LM3533_BOOST_OVP_SHIFT);
- if (ret)
- dev_err(lm3533->dev, "failed to set boost ovp\n");
-
- return ret;
-}
-
/*
* HVLED output config -- output hvled controlled by backlight bl
*/
@@ -406,18 +377,6 @@ static int lm3533_device_led_init(struct lm3533 *lm3533)
return 0;
}
-static int lm3533_device_setup(struct lm3533 *lm3533,
- struct lm3533_platform_data *pdata)
-{
- int ret;
-
- ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
- if (ret)
- return ret;
-
- return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
-}
-
static int lm3533_device_init(struct lm3533 *lm3533)
{
struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
@@ -437,9 +396,21 @@ static int lm3533_device_init(struct lm3533 *lm3533)
lm3533_enable(lm3533);
- ret = lm3533_device_setup(lm3533, pdata);
- if (ret)
+ ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
+ LM3533_BOOST_FREQ_MASK,
+ pdata->boost_freq << LM3533_BOOST_FREQ_SHIFT);
+ if (ret) {
+ dev_err(lm3533->dev, "failed to set boost frequency\n");
goto err_disable;
+ }
+
+ ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
+ LM3533_BOOST_OVP_MASK,
+ pdata->boost_ovp << LM3533_BOOST_OVP_SHIFT);
+ if (ret) {
+ dev_err(lm3533->dev, "failed to set boost ovp\n");
+ goto err_disable;
+ }
lm3533_device_als_init(lm3533);
lm3533_device_bl_init(lm3533);
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 07/14] mfd: lm3533: Use dev_groups in struct device_driver
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (5 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 06/14] mfd: lm3533-core: " Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:11 ` sashiko-bot
2026-06-17 8:00 ` [PATCH v5 08/14] mfd: lm3533: Convert to use OF bindings Svyatoslav Ryhel
` (6 subsequent siblings)
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Instead of creating and removing the device sysfs attributes directly
during probe and remove of the driver, respectively, use dev_groups in
struct device_driver to point to the attribute definitions and let the
core take care of creating and removing them.
No intentional functional impact.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/mfd/lm3533-core.c | 16 ++++++----------
drivers/video/backlight/lm3533_bl.c | 22 ++++++++--------------
2 files changed, 14 insertions(+), 24 deletions(-)
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index 45e7f7481aa0..b03a3ae96c10 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -296,6 +296,11 @@ static struct attribute_group lm3533_attribute_group = {
.attrs = lm3533_attributes
};
+static const struct attribute_group *lm3533_attribute_groups[] = {
+ &lm3533_attribute_group,
+ NULL,
+};
+
static int lm3533_device_als_init(struct lm3533 *lm3533)
{
struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
@@ -416,16 +421,8 @@ static int lm3533_device_init(struct lm3533 *lm3533)
lm3533_device_bl_init(lm3533);
lm3533_device_led_init(lm3533);
- ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
- if (ret < 0) {
- dev_err(lm3533->dev, "failed to create sysfs attributes\n");
- goto err_unregister;
- }
-
return 0;
-err_unregister:
- mfd_remove_devices(lm3533->dev);
err_disable:
lm3533_disable(lm3533);
@@ -436,8 +433,6 @@ static void lm3533_device_exit(struct lm3533 *lm3533)
{
dev_dbg(lm3533->dev, "%s\n", __func__);
- sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
-
mfd_remove_devices(lm3533->dev);
lm3533_disable(lm3533);
}
@@ -532,6 +527,7 @@ MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
static struct i2c_driver lm3533_i2c_driver = {
.driver = {
.name = "lm3533",
+ .dev_groups = lm3533_attribute_groups,
},
.id_table = lm3533_i2c_ids,
.probe = lm3533_i2c_probe,
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 4d6f68033480..9ef171d3aaea 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -237,6 +237,11 @@ static struct attribute_group lm3533_bl_attribute_group = {
.attrs = lm3533_bl_attributes
};
+static const struct attribute_group *lm3533_bl_attribute_groups[] = {
+ &lm3533_bl_attribute_group,
+ NULL,
+};
+
static int lm3533_bl_setup(struct lm3533_bl *bl,
struct lm3533_bl_platform_data *pdata)
{
@@ -304,28 +309,17 @@ static int lm3533_bl_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, bl);
- ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to create sysfs attributes\n");
- return ret;
- }
-
backlight_update_status(bd);
ret = lm3533_bl_setup(bl, pdata);
if (ret)
- goto err_sysfs_remove;
+ return ret;
ret = lm3533_ctrlbank_enable(&bl->cb);
if (ret)
- goto err_sysfs_remove;
+ return ret;
return 0;
-
-err_sysfs_remove:
- sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
-
- return ret;
}
static void lm3533_bl_remove(struct platform_device *pdev)
@@ -339,7 +333,6 @@ static void lm3533_bl_remove(struct platform_device *pdev)
bd->props.brightness = 0;
lm3533_ctrlbank_disable(&bl->cb);
- sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
}
#ifdef CONFIG_PM_SLEEP
@@ -377,6 +370,7 @@ static struct platform_driver lm3533_bl_driver = {
.driver = {
.name = "lm3533-backlight",
.pm = &lm3533_bl_pm_ops,
+ .dev_groups = lm3533_bl_attribute_groups,
},
.probe = lm3533_bl_probe,
.remove = lm3533_bl_remove,
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 07/14] mfd: lm3533: Use dev_groups in struct device_driver
2026-06-17 8:00 ` [PATCH v5 07/14] mfd: lm3533: Use dev_groups in struct device_driver Svyatoslav Ryhel
@ 2026-06-17 8:11 ` sashiko-bot
0 siblings, 0 replies; 22+ messages in thread
From: sashiko-bot @ 2026-06-17 8:11 UTC (permalink / raw)
To: Svyatoslav Ryhel; +Cc: devicetree, dri-devel, conor+dt, robh
Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] Unintentional user-space ABI breakage by moving custom sysfs attributes from the backlight class device to the platform device.
--
commit b4eaddced56809e9f87ffe143724f151f0e7013e
Author: Svyatoslav Ryhel <clamor95@gmail.com>
mfd: lm3533: Use dev_groups in struct device_driver
Instead of creating and removing the device sysfs attributes directly
during probe and remove of the driver, respectively, use dev_groups in
struct device_driver to point to the attribute definitions and let the
core take care of creating and removing them.
No intentional functional impact.
> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> index 4d6f680334802..9ef171d3aaeab 100644
> --- a/drivers/video/backlight/lm3533_bl.c
> +++ b/drivers/video/backlight/lm3533_bl.c
[ ... ]
> @@ -304,28 +309,17 @@ static int lm3533_bl_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, bl);
>
> - ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
> - if (ret < 0) {
> - dev_err(&pdev->dev, "failed to create sysfs attributes\n");
> - return ret;
> - }
> -
> backlight_update_status(bd);
[ ... ]
> @@ -377,6 +370,7 @@ static struct platform_driver lm3533_bl_driver = {
> .driver = {
> .name = "lm3533-backlight",
> .pm = &lm3533_bl_pm_ops,
> + .dev_groups = lm3533_bl_attribute_groups,
[Severity: High]
Does moving these attributes to the platform driver break the userspace ABI?
The old code explicitly created custom sysfs attributes on the backlight
device's kobject (&bd->dev.kobj), placing them in the backlight class
directory, for example under /sys/class/backlight/<name>/.
By attaching the attribute groups to the platform driver via .dev_groups, the
driver core will now create these attributes on the parent platform device
instead.
Since the commit message states there is no intentional functional impact,
could this path change accidentally break userspace tools or udev rules
that expect to find these custom attributes inside the backlight class
directory?
> },
> .probe = lm3533_bl_probe,
> .remove = lm3533_bl_remove,
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260617080031.99156-1-clamor95@gmail.com?part=7
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 08/14] mfd: lm3533: Convert to use OF bindings
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (6 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 07/14] mfd: lm3533: Use dev_groups in struct device_driver Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:16 ` sashiko-bot
2026-06-17 8:00 ` [PATCH v5 09/14] mfd: lm3533: Add support for VIN power supply Svyatoslav Ryhel
` (5 subsequent siblings)
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Since there are no users of this driver via platform data, remove the
platform data support and switch to using Device Tree bindings.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org> #for backlight
---
drivers/iio/light/lm3533-als.c | 67 +++++---
drivers/leds/leds-lm3533.c | 50 ++++--
drivers/mfd/lm3533-core.c | 236 ++++++++++++----------------
drivers/mfd/lm3533-ctrlbank.c | 5 -
drivers/video/backlight/lm3533_bl.c | 55 +++++--
include/linux/mfd/lm3533.h | 52 +-----
6 files changed, 220 insertions(+), 245 deletions(-)
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
index 69bac1b202f1..80f8fa700263 100644
--- a/drivers/iio/light/lm3533-als.c
+++ b/drivers/iio/light/lm3533-als.c
@@ -16,16 +16,19 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
+#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/units.h>
#include <linux/mfd/lm3533.h>
-#define LM3533_ALS_RESISTOR_MIN 1
-#define LM3533_ALS_RESISTOR_MAX 127
+#define LM3533_ALS_RESISTOR_MIN_OHMS 1575
+#define LM3533_ALS_RESISTOR_MAX_OHMS 200000
#define LM3533_ALS_CHANNEL_CURRENT_MAX 2
#define LM3533_ALS_THRESH_MAX 3
#define LM3533_ALS_ZONE_MAX 4
@@ -57,6 +60,9 @@ struct lm3533_als {
atomic_t zone;
struct mutex thresh_mutex;
+
+ u32 r_select;
+ bool pwm_mode;
};
@@ -403,7 +409,7 @@ static ssize_t show_thresh_either_en(struct device *dev,
int enable;
int ret;
- if (als->irq) {
+ if (als->irq > 0) {
ret = lm3533_als_get_int_mode(indio_dev, &enable);
if (ret)
return ret;
@@ -425,7 +431,7 @@ static ssize_t store_thresh_either_en(struct device *dev,
u8 zone;
int ret;
- if (!als->irq)
+ if (als->irq <= 0)
return -EBUSY;
if (kstrtoul(buf, 0, &enable))
@@ -708,29 +714,38 @@ static const struct attribute_group lm3533_als_attribute_group = {
.attrs = lm3533_als_attributes
};
-static int lm3533_als_setup(struct lm3533_als *als,
- const struct lm3533_als_platform_data *pdata)
+static int lm3533_als_setup(struct lm3533_als *als)
{
struct device *dev = &als->pdev->dev;
int ret;
+ als->pwm_mode = device_property_read_bool(dev, "ti,pwm-mode");
+
ret = regmap_assign_bits(als->regmap, LM3533_REG_ALS_CONF,
- LM3533_ALS_INPUT_MODE_MASK, pdata->pwm_mode);
+ LM3533_ALS_INPUT_MODE_MASK, als->pwm_mode);
if (ret)
return dev_err_probe(dev, ret, "failed to set input mode %d\n",
- pdata->pwm_mode);
+ als->pwm_mode);
/* Bail out when in PWM-mode */
- if (pdata->pwm_mode)
+ if (als->pwm_mode)
return 0;
- if (pdata->r_select < LM3533_ALS_RESISTOR_MIN ||
- pdata->r_select > LM3533_ALS_RESISTOR_MAX)
+ ret = device_property_read_u32(dev, "ti,resistor-ohms",
+ &als->r_select);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to ger resistor value\n");
+
+ if (als->r_select < LM3533_ALS_RESISTOR_MIN_OHMS ||
+ als->r_select > LM3533_ALS_RESISTOR_MAX_OHMS)
return dev_err_probe(dev, -EINVAL,
"invalid resistor value\n");
+ als->r_select = DIV_ROUND_UP(2 * MICRO, 10 * als->r_select);
+
ret = regmap_write(als->regmap, LM3533_REG_ALS_RESISTOR_SELECT,
- pdata->r_select);
+ als->r_select);
if (ret)
return dev_err_probe(dev, ret, "failed to set resistor\n");
@@ -793,7 +808,6 @@ static const struct iio_info lm3533_als_info = {
static int lm3533_als_probe(struct platform_device *pdev)
{
- const struct lm3533_als_platform_data *pdata;
struct lm3533 *lm3533;
struct lm3533_als *als;
struct iio_dev *indio_dev;
@@ -803,12 +817,6 @@ static int lm3533_als_probe(struct platform_device *pdev)
if (!lm3533)
return -EINVAL;
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data\n");
- return -EINVAL;
- }
-
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*als));
if (!indio_dev)
return -ENOMEM;
@@ -817,25 +825,27 @@ static int lm3533_als_probe(struct platform_device *pdev)
indio_dev->channels = lm3533_als_channels;
indio_dev->num_channels = ARRAY_SIZE(lm3533_als_channels);
indio_dev->name = dev_name(&pdev->dev);
- iio_device_set_parent(indio_dev, pdev->dev.parent);
indio_dev->modes = INDIO_DIRECT_MODE;
als = iio_priv(indio_dev);
als->regmap = lm3533->regmap;
als->pdev = pdev;
- als->irq = lm3533->irq;
+ als->irq = platform_get_irq_optional(pdev, 0);
+ if (als->irq == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
atomic_set(&als->zone, 0);
mutex_init(&als->thresh_mutex);
platform_set_drvdata(pdev, indio_dev);
- if (als->irq) {
+ if (als->irq > 0) {
ret = lm3533_als_setup_irq(als, indio_dev);
if (ret)
return ret;
}
- ret = lm3533_als_setup(als, pdata);
+ ret = lm3533_als_setup(als);
if (ret)
goto err_free_irq;
@@ -854,7 +864,7 @@ static int lm3533_als_probe(struct platform_device *pdev)
err_disable:
lm3533_als_disable(als);
err_free_irq:
- if (als->irq)
+ if (als->irq > 0)
free_irq(als->irq, indio_dev);
return ret;
@@ -868,13 +878,20 @@ static void lm3533_als_remove(struct platform_device *pdev)
lm3533_als_set_int_mode(indio_dev, false);
iio_device_unregister(indio_dev);
lm3533_als_disable(als);
- if (als->irq)
+ if (als->irq > 0)
free_irq(als->irq, indio_dev);
}
+static const struct of_device_id lm3533_als_match_table[] = {
+ { .compatible = "ti,lm3533-als" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lm3533_als_match_table);
+
static struct platform_driver lm3533_als_driver = {
.driver = {
.name = "lm3533-als",
+ .of_match_table = lm3533_als_match_table,
},
.probe = lm3533_als_probe,
.remove = lm3533_als_remove,
diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
index 0cb0585eb960..ed810c23f30f 100644
--- a/drivers/leds/leds-lm3533.c
+++ b/drivers/leds/leds-lm3533.c
@@ -10,8 +10,10 @@
#include <linux/module.h>
#include <linux/leds.h>
#include <linux/mfd/core.h>
+#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/slab.h>
@@ -50,6 +52,9 @@ struct lm3533_led {
struct mutex mutex;
unsigned long flags;
+ u32 max_current;
+ u32 pwm;
+
bool have_als;
};
@@ -616,22 +621,20 @@ static const struct attribute_group *lm3533_led_attribute_groups[] = {
NULL
};
-static int lm3533_led_setup(struct lm3533_led *led,
- struct lm3533_led_platform_data *pdata)
+static int lm3533_led_setup(struct lm3533_led *led)
{
int ret;
- ret = lm3533_ctrlbank_set_max_current(&led->cb, pdata->max_current);
+ ret = lm3533_ctrlbank_set_max_current(&led->cb, led->max_current);
if (ret)
return ret;
- return lm3533_ctrlbank_set_pwm(&led->cb, pdata->pwm);
+ return lm3533_ctrlbank_set_pwm(&led->cb, led->pwm);
}
static int lm3533_led_probe(struct platform_device *pdev)
{
struct lm3533 *lm3533;
- struct lm3533_led_platform_data *pdata;
struct lm3533_led *led;
int ret;
@@ -641,12 +644,6 @@ static int lm3533_led_probe(struct platform_device *pdev)
if (!lm3533)
return -EINVAL;
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data\n");
- return -EINVAL;
- }
-
if (pdev->id < 0 || pdev->id >= LM3533_LVCTRLBANK_COUNT) {
dev_err(&pdev->dev, "illegal LED id %d\n", pdev->id);
return -EINVAL;
@@ -659,8 +656,6 @@ static int lm3533_led_probe(struct platform_device *pdev)
led->regmap = lm3533->regmap;
led->have_als = lm3533->have_als;
- led->cdev.name = pdata->name;
- led->cdev.default_trigger = pdata->default_trigger;
led->cdev.brightness_set_blocking = lm3533_led_set;
led->cdev.brightness_get = lm3533_led_get;
led->cdev.blink_set = lm3533_led_blink_set;
@@ -668,6 +663,15 @@ static int lm3533_led_probe(struct platform_device *pdev)
led->cdev.groups = lm3533_led_attribute_groups;
led->id = pdev->id;
+ led->cdev.name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s-%d",
+ pdev->name, led->id);
+ if (!led->cdev.name)
+ return -ENOMEM;
+
+ led->cdev.default_trigger = "none";
+ device_property_read_string(&pdev->dev, "linux,default-trigger",
+ &led->cdev.default_trigger);
+
mutex_init(&led->mutex);
/* The class framework makes a callback to get brightness during
@@ -680,15 +684,22 @@ static int lm3533_led_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, led);
- ret = led_classdev_register(pdev->dev.parent, &led->cdev);
+ ret = led_classdev_register(&pdev->dev, &led->cdev);
if (ret) {
- dev_err(&pdev->dev, "failed to register LED %d\n", pdev->id);
+ dev_err(&pdev->dev, "failed to register LED %d\n", led->id);
return ret;
}
led->cb.dev = led->cdev.dev;
- ret = lm3533_led_setup(led, pdata);
+ device_property_read_u32(&pdev->dev, "led-max-microamp",
+ &led->max_current);
+ led->max_current = clamp(led->max_current, LM3533_MAX_CURRENT_MIN,
+ LM3533_MAX_CURRENT_MAX);
+
+ device_property_read_u32(&pdev->dev, "ti,pwm-config-mask", &led->pwm);
+
+ ret = lm3533_led_setup(led);
if (ret)
goto err_deregister;
@@ -725,9 +736,16 @@ static void lm3533_led_shutdown(struct platform_device *pdev)
lm3533_led_set(&led->cdev, LED_OFF); /* disable blink */
}
+static const struct of_device_id lm3533_led_match_table[] = {
+ { .compatible = "ti,lm3533-leds" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lm3533_led_match_table);
+
static struct platform_driver lm3533_led_driver = {
.driver = {
.name = "lm3533-leds",
+ .of_match_table = lm3533_led_match_table,
},
.probe = lm3533_led_probe,
.remove = lm3533_led_remove,
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index b03a3ae96c10..a5aa7da9668b 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -14,19 +14,26 @@
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/units.h>
#include <linux/mfd/lm3533.h>
#define LM3533_BOOST_OVP_MASK 0x06
#define LM3533_BOOST_OVP_SHIFT 1
+#define LM3533_BOOST_OVP_MIN (16 * MICRO)
+#define LM3533_BOOST_OVP_MAX (40 * MICRO)
#define LM3533_BOOST_FREQ_MASK 0x01
#define LM3533_BOOST_FREQ_SHIFT 0
+#define LM3533_BOOST_FREQ_MIN (500 * HZ_PER_KHZ)
+#define LM3533_BOOST_FREQ_MAX (1000 * HZ_PER_KHZ)
#define LM3533_BL_ID_MASK 1
#define LM3533_LED_ID_MASK 3
@@ -35,6 +42,7 @@
#define LM3533_HVLED_ID_MAX 2
#define LM3533_LVLED_ID_MAX 5
+#define LM3533_CELLS_MAX 7
#define LM3533_REG_OUTPUT_CONF1 0x10
#define LM3533_REG_OUTPUT_CONF2 0x11
@@ -42,44 +50,6 @@
#define LM3533_REG_MAX 0xb2
-
-static struct mfd_cell lm3533_als_devs[] = {
- {
- .name = "lm3533-als",
- .id = -1,
- },
-};
-
-static struct mfd_cell lm3533_bl_devs[] = {
- {
- .name = "lm3533-backlight",
- .id = 0,
- },
- {
- .name = "lm3533-backlight",
- .id = 1,
- },
-};
-
-static struct mfd_cell lm3533_led_devs[] = {
- {
- .name = "lm3533-leds",
- .id = 0,
- },
- {
- .name = "lm3533-leds",
- .id = 1,
- },
- {
- .name = "lm3533-leds",
- .id = 2,
- },
- {
- .name = "lm3533-leds",
- .id = 3,
- },
-};
-
/*
* HVLED output config -- output hvled controlled by backlight bl
*/
@@ -301,125 +271,91 @@ static const struct attribute_group *lm3533_attribute_groups[] = {
NULL,
};
-static int lm3533_device_als_init(struct lm3533 *lm3533)
-{
- struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
- int ret;
-
- if (!pdata->als)
- return 0;
-
- lm3533_als_devs[0].platform_data = pdata->als;
- lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
-
- ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
- 0, NULL);
- if (ret) {
- dev_err(lm3533->dev, "failed to add ALS device\n");
- return ret;
- }
-
- lm3533->have_als = 1;
-
- return 0;
-}
-
-static int lm3533_device_bl_init(struct lm3533 *lm3533)
-{
- struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
- int i;
- int ret;
-
- if (!pdata->backlights || pdata->num_backlights == 0)
- return 0;
-
- if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
- pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
-
- for (i = 0; i < pdata->num_backlights; ++i) {
- lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
- lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
- }
-
- ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
- pdata->num_backlights, NULL, 0, NULL);
- if (ret) {
- dev_err(lm3533->dev, "failed to add backlight devices\n");
- return ret;
- }
-
- lm3533->have_backlights = 1;
-
- return 0;
-}
-
-static int lm3533_device_led_init(struct lm3533 *lm3533)
-{
- struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
- int i;
- int ret;
-
- if (!pdata->leds || pdata->num_leds == 0)
- return 0;
-
- if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
- pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
-
- for (i = 0; i < pdata->num_leds; ++i) {
- lm3533_led_devs[i].platform_data = &pdata->leds[i];
- lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
- }
-
- ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
- pdata->num_leds, NULL, 0, NULL);
- if (ret) {
- dev_err(lm3533->dev, "failed to add LED devices\n");
- return ret;
- }
-
- lm3533->have_leds = 1;
-
- return 0;
-}
-
static int lm3533_device_init(struct lm3533 *lm3533)
{
- struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
+ struct device *dev = lm3533->dev;
+ struct mfd_cell *lm3533_devices;
+ u32 count = 0, reg, nchilds;
int ret;
- dev_dbg(lm3533->dev, "%s\n", __func__);
+ nchilds = device_get_child_node_count(dev);
+ if (!nchilds || nchilds > LM3533_CELLS_MAX)
+ return dev_err_probe(dev, -ENODEV,
+ "num of child nodes is not supported\n");
- if (!pdata) {
- dev_err(lm3533->dev, "no platform data\n");
- return -EINVAL;
- }
+ lm3533_devices = devm_kcalloc(dev, nchilds, sizeof(*lm3533_devices),
+ GFP_KERNEL);
+ if (!lm3533_devices)
+ return -ENOMEM;
- lm3533->hwen = devm_gpiod_get(lm3533->dev, NULL, GPIOD_OUT_LOW);
- if (IS_ERR(lm3533->hwen))
- return dev_err_probe(lm3533->dev, PTR_ERR(lm3533->hwen), "failed to request HWEN GPIO\n");
- gpiod_set_consumer_name(lm3533->hwen, "lm3533-hwen");
+ device_for_each_child_node_scoped(dev, child) {
+ if (count >= nchilds)
+ break;
+
+ if (fwnode_device_is_compatible(child, "ti,lm3533-als")) {
+ lm3533_devices[count].name = "lm3533-als";
+ lm3533_devices[count].of_compatible = "ti,lm3533-als";
+ lm3533_devices[count].id = PLATFORM_DEVID_NONE;
+
+ lm3533->have_als = true;
+ count++;
+ } else if (fwnode_device_is_compatible(child, "ti,lm3533-backlight")) {
+ ret = fwnode_property_read_u32(child, "reg", ®);
+ if (ret || reg >= LM3533_HVLED_ID_MAX) {
+ dev_err(dev, "invalid backlight node %pfw\n", child);
+ continue;
+ }
+
+ lm3533_devices[count].name = "lm3533-backlight";
+ lm3533_devices[count].of_compatible = "ti,lm3533-backlight";
+ lm3533_devices[count].id = reg;
+ lm3533_devices[count].of_reg = reg;
+ lm3533_devices[count].use_of_reg = true;
+
+ lm3533->have_backlights = true;
+ count++;
+ } else if (fwnode_device_is_compatible(child, "ti,lm3533-leds")) {
+ ret = fwnode_property_read_u32(child, "reg", ®);
+ if (ret || reg < LM3533_HVLED_ID_MAX ||
+ reg > LM3533_LVLED_ID_MAX) {
+ dev_err(dev, "invalid LED node %pfw\n", child);
+ continue;
+ }
+
+ lm3533_devices[count].name = "lm3533-leds";
+ lm3533_devices[count].of_compatible = "ti,lm3533-leds";
+ lm3533_devices[count].id = reg - LM3533_HVLED_ID_MAX;
+ lm3533_devices[count].of_reg = reg;
+ lm3533_devices[count].use_of_reg = true;
+
+ lm3533->have_leds = true;
+ count++;
+ }
+ }
lm3533_enable(lm3533);
ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
LM3533_BOOST_FREQ_MASK,
- pdata->boost_freq << LM3533_BOOST_FREQ_SHIFT);
+ lm3533->boost_freq << LM3533_BOOST_FREQ_SHIFT);
if (ret) {
- dev_err(lm3533->dev, "failed to set boost frequency\n");
+ dev_err(dev, "failed to set boost frequency\n");
goto err_disable;
}
ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
LM3533_BOOST_OVP_MASK,
- pdata->boost_ovp << LM3533_BOOST_OVP_SHIFT);
+ lm3533->boost_ovp << LM3533_BOOST_OVP_SHIFT);
if (ret) {
- dev_err(lm3533->dev, "failed to set boost ovp\n");
+ dev_err(dev, "failed to set boost ovp\n");
goto err_disable;
}
- lm3533_device_als_init(lm3533);
- lm3533_device_bl_init(lm3533);
- lm3533_device_led_init(lm3533);
+ ret = mfd_add_devices(dev, 0, lm3533_devices, count, NULL, 0, NULL);
+ if (ret) {
+ dev_err(dev, "failed to add MFD devices: %d\n", ret);
+ goto err_disable;
+ }
return 0;
@@ -504,7 +440,26 @@ static int lm3533_i2c_probe(struct i2c_client *i2c)
return PTR_ERR(lm3533->regmap);
lm3533->dev = &i2c->dev;
- lm3533->irq = i2c->irq;
+
+ lm3533->hwen = devm_gpiod_get_optional(lm3533->dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(lm3533->hwen))
+ return dev_err_probe(lm3533->dev, PTR_ERR(lm3533->hwen),
+ "failed to get HWEN GPIO\n");
+
+ device_property_read_u32(lm3533->dev, "ti,boost-ovp-microvolt",
+ &lm3533->boost_ovp);
+
+ lm3533->boost_ovp = clamp(lm3533->boost_ovp, LM3533_BOOST_OVP_MIN,
+ LM3533_BOOST_OVP_MAX);
+ lm3533->boost_ovp = lm3533->boost_ovp / (8 * MICRO) - 2;
+
+ device_property_read_u32(lm3533->dev, "ti,boost-freq-hz",
+ &lm3533->boost_freq);
+
+ lm3533->boost_freq = clamp(lm3533->boost_freq, LM3533_BOOST_FREQ_MIN,
+ LM3533_BOOST_FREQ_MAX);
+ lm3533->boost_freq = lm3533->boost_freq / (500 * KILO) - 1;
return lm3533_device_init(lm3533);
}
@@ -518,6 +473,12 @@ static void lm3533_i2c_remove(struct i2c_client *i2c)
lm3533_device_exit(lm3533);
}
+static const struct of_device_id lm3533_match_table[] = {
+ { .compatible = "ti,lm3533" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lm3533_match_table);
+
static const struct i2c_device_id lm3533_i2c_ids[] = {
{ "lm3533" },
{ }
@@ -528,6 +489,7 @@ static struct i2c_driver lm3533_i2c_driver = {
.driver = {
.name = "lm3533",
.dev_groups = lm3533_attribute_groups,
+ .of_match_table = lm3533_match_table,
},
.id_table = lm3533_i2c_ids,
.probe = lm3533_i2c_probe,
diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c
index 91e13cfa3cf0..3aab8ece4e8c 100644
--- a/drivers/mfd/lm3533-ctrlbank.c
+++ b/drivers/mfd/lm3533-ctrlbank.c
@@ -13,11 +13,6 @@
#include <linux/mfd/lm3533.h>
-
-#define LM3533_MAX_CURRENT_MIN 5000
-#define LM3533_MAX_CURRENT_MAX 29800
-#define LM3533_MAX_CURRENT_STEP 800
-
#define LM3533_PWM_MAX 0x3f
#define LM3533_REG_PWM_BASE 0x14
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 9ef171d3aaea..2c24647fc17a 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -9,7 +9,9 @@
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
+#include <linux/property.h>
#include <linux/backlight.h>
#include <linux/regmap.h>
#include <linux/slab.h>
@@ -29,6 +31,9 @@ struct lm3533_bl {
struct backlight_device *bd;
int id;
+ u32 max_current;
+ u32 pwm;
+
bool have_als;
};
@@ -242,25 +247,25 @@ static const struct attribute_group *lm3533_bl_attribute_groups[] = {
NULL,
};
-static int lm3533_bl_setup(struct lm3533_bl *bl,
- struct lm3533_bl_platform_data *pdata)
+static int lm3533_bl_setup(struct lm3533_bl *bl)
{
int ret;
- ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current);
+ ret = lm3533_ctrlbank_set_max_current(&bl->cb, bl->max_current);
if (ret)
return ret;
- return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm);
+ return lm3533_ctrlbank_set_pwm(&bl->cb, bl->pwm);
}
static int lm3533_bl_probe(struct platform_device *pdev)
{
struct lm3533 *lm3533;
- struct lm3533_bl_platform_data *pdata;
struct lm3533_bl *bl;
struct backlight_device *bd;
struct backlight_properties props;
+ char *name = NULL;
+ u32 default_brightness = LM3533_BL_MAX_BRIGHTNESS;
int ret;
dev_dbg(&pdev->dev, "%s\n", __func__);
@@ -269,12 +274,6 @@ static int lm3533_bl_probe(struct platform_device *pdev)
if (!lm3533)
return -EINVAL;
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data\n");
- return -EINVAL;
- }
-
if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) {
dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id);
return -EINVAL;
@@ -292,13 +291,21 @@ static int lm3533_bl_probe(struct platform_device *pdev)
bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
bl->cb.dev = NULL; /* until registered */
+ name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s-%d",
+ pdev->name, pdev->id);
+ if (!name)
+ return -ENOMEM;
+
+ device_property_read_u32(&pdev->dev, "default-brightness",
+ &default_brightness);
+
memset(&props, 0, sizeof(props));
props.type = BACKLIGHT_RAW;
props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
- props.brightness = pdata->default_brightness;
- bd = devm_backlight_device_register(&pdev->dev, pdata->name,
- pdev->dev.parent, bl, &lm3533_bl_ops,
- &props);
+ props.brightness = default_brightness;
+
+ bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
+ bl, &lm3533_bl_ops, &props);
if (IS_ERR(bd)) {
dev_err(&pdev->dev, "failed to register backlight device\n");
return PTR_ERR(bd);
@@ -309,12 +316,19 @@ static int lm3533_bl_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, bl);
- backlight_update_status(bd);
+ device_property_read_u32(&pdev->dev, "led-max-microamp",
+ &bl->max_current);
+ bl->max_current = clamp(bl->max_current, LM3533_MAX_CURRENT_MIN,
+ LM3533_MAX_CURRENT_MAX);
- ret = lm3533_bl_setup(bl, pdata);
+ device_property_read_u32(&pdev->dev, "ti,pwm-config-mask", &bl->pwm);
+
+ ret = lm3533_bl_setup(bl);
if (ret)
return ret;
+ backlight_update_status(bd);
+
ret = lm3533_ctrlbank_enable(&bl->cb);
if (ret)
return ret;
@@ -366,11 +380,18 @@ static void lm3533_bl_shutdown(struct platform_device *pdev)
lm3533_ctrlbank_disable(&bl->cb);
}
+static const struct of_device_id lm3533_bl_match_table[] = {
+ { .compatible = "ti,lm3533-backlight" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lm3533_bl_match_table);
+
static struct platform_driver lm3533_bl_driver = {
.driver = {
.name = "lm3533-backlight",
.pm = &lm3533_bl_pm_ops,
.dev_groups = lm3533_bl_attribute_groups,
+ .of_match_table = lm3533_bl_match_table,
},
.probe = lm3533_bl_probe,
.remove = lm3533_bl_remove,
diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h
index 74cfb52c3bd1..5710e88da45d 100644
--- a/include/linux/mfd/lm3533.h
+++ b/include/linux/mfd/lm3533.h
@@ -15,6 +15,10 @@
#define LM3533_ATTR_RW(_name) \
DEVICE_ATTR(_name, S_IRUGO | S_IWUSR , show_##_name, store_##_name)
+#define LM3533_MAX_CURRENT_MIN 5000
+#define LM3533_MAX_CURRENT_MAX 29800
+#define LM3533_MAX_CURRENT_STEP 800
+
struct device;
struct gpio_desc;
struct regmap;
@@ -25,7 +29,9 @@ struct lm3533 {
struct regmap *regmap;
struct gpio_desc *hwen;
- int irq;
+
+ u32 boost_ovp;
+ u32 boost_freq;
unsigned have_als:1;
unsigned have_backlights:1;
@@ -38,50 +44,6 @@ struct lm3533_ctrlbank {
int id;
};
-struct lm3533_als_platform_data {
- unsigned pwm_mode:1; /* PWM input mode (default analog) */
- u8 r_select; /* 1 - 127 (ignored in PWM-mode) */
-};
-
-struct lm3533_bl_platform_data {
- char *name;
- u16 max_current; /* 5000 - 29800 uA (800 uA step) */
- u8 default_brightness; /* 0 - 255 */
- u8 pwm; /* 0 - 0x3f */
-};
-
-struct lm3533_led_platform_data {
- char *name;
- const char *default_trigger;
- u16 max_current; /* 5000 - 29800 uA (800 uA step) */
- u8 pwm; /* 0 - 0x3f */
-};
-
-enum lm3533_boost_freq {
- LM3533_BOOST_FREQ_500KHZ,
- LM3533_BOOST_FREQ_1000KHZ,
-};
-
-enum lm3533_boost_ovp {
- LM3533_BOOST_OVP_16V,
- LM3533_BOOST_OVP_24V,
- LM3533_BOOST_OVP_32V,
- LM3533_BOOST_OVP_40V,
-};
-
-struct lm3533_platform_data {
- enum lm3533_boost_ovp boost_ovp;
- enum lm3533_boost_freq boost_freq;
-
- struct lm3533_als_platform_data *als;
-
- struct lm3533_bl_platform_data *backlights;
- int num_backlights;
-
- struct lm3533_led_platform_data *leds;
- int num_leds;
-};
-
int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb);
int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb);
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 08/14] mfd: lm3533: Convert to use OF bindings
2026-06-17 8:00 ` [PATCH v5 08/14] mfd: lm3533: Convert to use OF bindings Svyatoslav Ryhel
@ 2026-06-17 8:16 ` sashiko-bot
0 siblings, 0 replies; 22+ messages in thread
From: sashiko-bot @ 2026-06-17 8:16 UTC (permalink / raw)
To: Svyatoslav Ryhel; +Cc: robh, dri-devel, devicetree, conor+dt
Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] The `default-brightness` property is read from the Device Tree as a `u32` without being clamped to `LM3533_BL_MAX_BRIGHTNESS` (255).
--
commit ea75baf449ff637e79d3393f0fdd68b3fcf947de
Author: Svyatoslav Ryhel <clamor95@gmail.com>
mfd: lm3533: Convert to use OF bindings
This commit removes platform data support and transitions the driver to use
Device Tree bindings for its configuration.
> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> index 9ef171d3aaeab..2c24647fc17a4 100644
> --- a/drivers/video/backlight/lm3533_bl.c
> +++ b/drivers/video/backlight/lm3533_bl.c
[ ... ]
> @@ -292,13 +291,21 @@ static int lm3533_bl_probe(struct platform_device *pdev)
> bl->cb.id = lm3533_bl_get_ctrlbank_id(bl);
> bl->cb.dev = NULL; /* until registered */
>
> + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s-%d",
> + pdev->name, pdev->id);
> + if (!name)
> + return -ENOMEM;
> +
> + device_property_read_u32(&pdev->dev, "default-brightness",
> + &default_brightness);
> +
> memset(&props, 0, sizeof(props));
> props.type = BACKLIGHT_RAW;
> props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
> - props.brightness = pdata->default_brightness;
> + props.brightness = default_brightness;
[Severity: Medium]
Should default_brightness be clamped to LM3533_BL_MAX_BRIGHTNESS before being
assigned to props.brightness?
The transition to Device Tree bindings introduces reading default-brightness
as a u32. In the previous platform data implementation, default_brightness
was a u8, which inherently restricted it to a 0-255 range.
If a Device Tree provides a value greater than 255, it will be implicitly
truncated to an 8-bit unsigned integer when passed to the hardware writing
functions (for instance, 256 would wrap around to 0). This would cause the
backlight to turn off instead of setting it to the expected maximum brightness.
Does it make sense to clamp default_brightness similar to how led-max-microamp
is clamped later in this function?
> - bd = devm_backlight_device_register(&pdev->dev, pdata->name,
> - pdev->dev.parent, bl, &lm3533_bl_ops,
> - &props);
> +
> + bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
> + bl, &lm3533_bl_ops, &props);
[ ... ]
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260617080031.99156-1-clamor95@gmail.com?part=8
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 09/14] mfd: lm3533: Add support for VIN power supply
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (7 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 08/14] mfd: lm3533: Convert to use OF bindings Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 10/14] mfd: lm3533: Set DMA mask Svyatoslav Ryhel
` (4 subsequent siblings)
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Add support for 2.7V-5.5V VIN power supply.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/mfd/lm3533-core.c | 23 +++++++++++++++++++++--
include/linux/mfd/lm3533.h | 2 ++
2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index a5aa7da9668b..4b5d94e9ed27 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -17,6 +17,7 @@
#include <linux/mod_devicetable.h>
#include <linux/property.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
@@ -113,14 +114,25 @@ static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
return ret;
}
-static void lm3533_enable(struct lm3533 *lm3533)
+static int lm3533_enable(struct lm3533 *lm3533)
{
+ int ret;
+
+ ret = regulator_enable(lm3533->vin_supply);
+ if (ret) {
+ dev_err(lm3533->dev, "failed to enable vin power supply\n");
+ return ret;
+ }
+
gpiod_set_value(lm3533->hwen, 1);
+
+ return 0;
}
static void lm3533_disable(struct lm3533 *lm3533)
{
gpiod_set_value(lm3533->hwen, 0);
+ regulator_disable(lm3533->vin_supply);
}
enum lm3533_attribute_type {
@@ -333,7 +345,9 @@ static int lm3533_device_init(struct lm3533 *lm3533)
}
}
- lm3533_enable(lm3533);
+ ret = lm3533_enable(lm3533);
+ if (ret)
+ return ret;
ret = regmap_update_bits(lm3533->regmap, LM3533_REG_BOOST_PWM,
LM3533_BOOST_FREQ_MASK,
@@ -447,6 +461,11 @@ static int lm3533_i2c_probe(struct i2c_client *i2c)
return dev_err_probe(lm3533->dev, PTR_ERR(lm3533->hwen),
"failed to get HWEN GPIO\n");
+ lm3533->vin_supply = devm_regulator_get(lm3533->dev, "vin");
+ if (IS_ERR(lm3533->vin_supply))
+ return dev_err_probe(lm3533->dev, PTR_ERR(lm3533->vin_supply),
+ "failed to get vin-supply\n");
+
device_property_read_u32(lm3533->dev, "ti,boost-ovp-microvolt",
&lm3533->boost_ovp);
diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h
index 5710e88da45d..8f72dd41e8f0 100644
--- a/include/linux/mfd/lm3533.h
+++ b/include/linux/mfd/lm3533.h
@@ -22,6 +22,7 @@
struct device;
struct gpio_desc;
struct regmap;
+struct regulator;
struct lm3533 {
struct device *dev;
@@ -29,6 +30,7 @@ struct lm3533 {
struct regmap *regmap;
struct gpio_desc *hwen;
+ struct regulator *vin_supply;
u32 boost_ovp;
u32 boost_freq;
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 10/14] mfd: lm3533: Set DMA mask
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (8 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 09/14] mfd: lm3533: Add support for VIN power supply Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 11/14] video: backlight: lm3533_bl: Improve logic of sysfs functions Svyatoslav Ryhel
` (3 subsequent siblings)
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Missing coherent_dma_mask assigning triggers the following warning in
dmesg:
[ 3.287872] platform lm3533-backlight.0: DMA mask not set
Since this warning might be elevated to an error in the future, set
coherent_dma_mask to zero because both the core and cells do not utilize
DMA.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/mfd/lm3533-core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
index 4b5d94e9ed27..db8581d1b073 100644
--- a/drivers/mfd/lm3533-core.c
+++ b/drivers/mfd/lm3533-core.c
@@ -480,6 +480,10 @@ static int lm3533_i2c_probe(struct i2c_client *i2c)
LM3533_BOOST_FREQ_MAX);
lm3533->boost_freq = lm3533->boost_freq / (500 * KILO) - 1;
+ /* LM3533 and child devices do not use DMA */
+ i2c->dev.coherent_dma_mask = 0;
+ i2c->dev.dma_mask = &i2c->dev.coherent_dma_mask;
+
return lm3533_device_init(lm3533);
}
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 11/14] video: backlight: lm3533_bl: Improve logic of sysfs functions
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (9 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 10/14] mfd: lm3533: Set DMA mask Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:16 ` sashiko-bot
2026-06-17 8:00 ` [PATCH v5 12/14] video: backlight: lm3533_bl: Set initial mapping mode from DT Svyatoslav Ryhel
` (2 subsequent siblings)
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Simplify the sysfs logic of properties by switching to macros and proper
regmap helpers.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>
---
drivers/video/backlight/lm3533_bl.c | 62 ++++++++++-------------------
1 file changed, 22 insertions(+), 40 deletions(-)
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 2c24647fc17a..9eb0db640948 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -23,6 +23,8 @@
#define LM3533_BL_MAX_BRIGHTNESS 255
#define LM3533_REG_CTRLBANK_AB_BCONF 0x1a
+#define CTRLBANK_AB_BCONF_ALS(n) BIT(2 * (n))
+#define CTRLBANK_AB_BCONF_MODE(n) BIT(2 * (n) + 1)
struct lm3533_bl {
@@ -85,88 +87,68 @@ static ssize_t show_als_channel(struct device *dev,
return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
}
-static ssize_t show_als_en(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t show_als_en(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
- u32 val;
- u8 mask;
- bool enable;
int ret;
- ret = regmap_read(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
- if (ret)
+ ret = regmap_test_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ CTRLBANK_AB_BCONF_ALS(ctrlbank));
+ if (ret < 0)
return ret;
- mask = 1 << (2 * ctrlbank);
- enable = val & mask;
-
- return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ret);
}
-static ssize_t store_als_en(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static ssize_t store_als_en(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
int enable;
- u8 mask;
int ret;
if (kstrtoint(buf, 0, &enable))
return -EINVAL;
- mask = 1 << (2 * ctrlbank);
-
ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
- mask, enable);
+ CTRLBANK_AB_BCONF_ALS(ctrlbank), enable);
if (ret)
return ret;
return len;
}
-static ssize_t show_linear(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t show_linear(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
- u32 val;
- u8 mask;
- int linear;
+ int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
int ret;
- ret = regmap_read(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF, &val);
- if (ret)
+ ret = regmap_test_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ CTRLBANK_AB_BCONF_MODE(ctrlbank));
+ if (ret < 0)
return ret;
- mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
-
- if (val & mask)
- linear = 1;
- else
- linear = 0;
-
- return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
+ return scnprintf(buf, PAGE_SIZE, "%x\n", ret);
}
-static ssize_t store_linear(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t len)
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
+ int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
unsigned long linear;
- u8 mask;
int ret;
if (kstrtoul(buf, 0, &linear))
return -EINVAL;
- mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1);
-
ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
- mask, linear);
+ CTRLBANK_AB_BCONF_MODE(ctrlbank), linear);
if (ret)
return ret;
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 11/14] video: backlight: lm3533_bl: Improve logic of sysfs functions
2026-06-17 8:00 ` [PATCH v5 11/14] video: backlight: lm3533_bl: Improve logic of sysfs functions Svyatoslav Ryhel
@ 2026-06-17 8:16 ` sashiko-bot
0 siblings, 0 replies; 22+ messages in thread
From: sashiko-bot @ 2026-06-17 8:16 UTC (permalink / raw)
To: Svyatoslav Ryhel; +Cc: robh, devicetree, dri-devel, conor+dt
Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Critical] Sysfs attributes were inadvertently moved from the backlight class device to the platform device, breaking userspace ABI.
--
commit b4eaddced56809e9f87ffe143724f151f0e7013e
Author: Svyatoslav Ryhel <clamor95@gmail.com>
mfd: lm3533: Use dev_groups in struct device_driver
This commit replaces manual sysfs attribute creation during probe and
removal in favor of using dev_groups in struct device_driver. The goal
is to let the core handle the creation and removal of these attributes
automatically.
> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> index 4d6f680334802..9ef171d3aaeab 100644
> --- a/drivers/video/backlight/lm3533_bl.c
> +++ b/drivers/video/backlight/lm3533_bl.c
[ ... ]
> @@ -304,28 +309,17 @@ static int lm3533_bl_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, bl);
>
> - ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group);
[Severity: Critical]
By removing this manual sysfs_create_group() call and moving it to the platform
driver's dev_groups, will this change the location of the sysfs attributes?
The original code registers the attributes on the backlight class device's
kobject (&bd->dev.kobj), meaning they appear under
/sys/class/backlight/<name>/.
> - if (ret < 0) {
> - dev_err(&pdev->dev, "failed to create sysfs attributes\n");
> - return ret;
> - }
> -
> backlight_update_status(bd);
[ ... ]
> @@ -377,6 +370,7 @@ static struct platform_driver lm3533_bl_driver = {
> .driver = {
> .name = "lm3533-backlight",
> .pm = &lm3533_bl_pm_ops,
> + .dev_groups = lm3533_bl_attribute_groups,
[Severity: Critical]
Does moving the attributes to the platform driver's dev_groups inadvertently
register them on the platform device instead of the backlight class device?
This means attributes like als_channel, als_en, and linear would now be exposed
under /sys/bus/platform/devices/lm3533-backlight.<id>/ instead of their
previous location.
Will this break backward compatibility for userspace tools relying on the
standard backlight path?
> },
> .probe = lm3533_bl_probe,
> .remove = lm3533_bl_remove,
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260617080031.99156-1-clamor95@gmail.com?part=11
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 12/14] video: backlight: lm3533_bl: Set initial mapping mode from DT
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (10 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 11/14] video: backlight: lm3533_bl: Improve logic of sysfs functions Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 13/14] video: backlight: lm3533_bl: Implement backlight_scale property Svyatoslav Ryhel
2026-06-17 8:00 ` [PATCH v5 14/14] video: leds: backlight: lm3533: Support getting LED sources from DT Svyatoslav Ryhel
13 siblings, 0 replies; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Add support to obtain the initial mapping mode from DT instead of leaving
it unconfigured.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>
---
drivers/video/backlight/lm3533_bl.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 9eb0db640948..d003d5802508 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -37,6 +37,7 @@ struct lm3533_bl {
u32 pwm;
bool have_als;
+ bool linear;
};
@@ -231,8 +232,14 @@ static const struct attribute_group *lm3533_bl_attribute_groups[] = {
static int lm3533_bl_setup(struct lm3533_bl *bl)
{
+ int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
int ret;
+ ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
+ CTRLBANK_AB_BCONF_MODE(ctrlbank), bl->linear);
+ if (ret)
+ return ret;
+
ret = lm3533_ctrlbank_set_max_current(&bl->cb, bl->max_current);
if (ret)
return ret;
@@ -286,6 +293,9 @@ static int lm3533_bl_probe(struct platform_device *pdev)
props.max_brightness = LM3533_BL_MAX_BRIGHTNESS;
props.brightness = default_brightness;
+ bl->linear = device_property_read_bool(&pdev->dev,
+ "ti,linear-mapping-mode");
+
bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
bl, &lm3533_bl_ops, &props);
if (IS_ERR(bd)) {
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v5 13/14] video: backlight: lm3533_bl: Implement backlight_scale property
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (11 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 12/14] video: backlight: lm3533_bl: Set initial mapping mode from DT Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:17 ` sashiko-bot
2026-06-17 8:00 ` [PATCH v5 14/14] video: leds: backlight: lm3533: Support getting LED sources from DT Svyatoslav Ryhel
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Since the device supports linear and non-linear modes, implement the
backlight_scale property to describe this state.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>
---
drivers/video/backlight/lm3533_bl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index d003d5802508..c99fc68cb669 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -142,6 +142,7 @@ static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
{
struct lm3533_bl *bl = dev_get_drvdata(dev);
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
+ struct backlight_device *bd = bl->bd;
unsigned long linear;
int ret;
@@ -153,6 +154,9 @@ static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
if (ret)
return ret;
+ bd->props.scale = linear ? BACKLIGHT_SCALE_LINEAR :
+ BACKLIGHT_SCALE_NON_LINEAR;
+
return len;
}
@@ -295,6 +299,8 @@ static int lm3533_bl_probe(struct platform_device *pdev)
bl->linear = device_property_read_bool(&pdev->dev,
"ti,linear-mapping-mode");
+ props.scale = bl->linear ? BACKLIGHT_SCALE_LINEAR :
+ BACKLIGHT_SCALE_NON_LINEAR;
bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
bl, &lm3533_bl_ops, &props);
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 13/14] video: backlight: lm3533_bl: Implement backlight_scale property
2026-06-17 8:00 ` [PATCH v5 13/14] video: backlight: lm3533_bl: Implement backlight_scale property Svyatoslav Ryhel
@ 2026-06-17 8:17 ` sashiko-bot
0 siblings, 0 replies; 22+ messages in thread
From: sashiko-bot @ 2026-06-17 8:17 UTC (permalink / raw)
To: Svyatoslav Ryhel; +Cc: dri-devel, conor+dt, devicetree, robh
Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] Race condition in `store_linear` leading to hardware and software state mismatch.
--
commit 52a62eb2455ff3beba4492c4d5e3f63ad2e5e71d
Author: Svyatoslav Ryhel <clamor95@gmail.com>
video: backlight: lm3533_bl: Implement backlight_scale property
This commit implements the backlight_scale property for the lm3533_bl driver.
It describes whether the backlight operates in linear or non-linear mode
based on the device state.
> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> --- a/drivers/video/backlight/lm3533_bl.c
> +++ b/drivers/video/backlight/lm3533_bl.c
> @@ -142,6 +142,7 @@ static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
> {
> struct lm3533_bl *bl = dev_get_drvdata(dev);
> int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
> + struct backlight_device *bd = bl->bd;
> unsigned long linear;
> int ret;
>
> @@ -153,6 +154,9 @@ static ssize_t store_linear(struct device *dev, struct device_attribute *attr,
> if (ret)
> return ret;
>
> + bd->props.scale = linear ? BACKLIGHT_SCALE_LINEAR :
> + BACKLIGHT_SCALE_NON_LINEAR;
[Severity: Medium]
Could this allow the hardware state and the software property to diverge
during concurrent writes?
Since kernfs does not serialize concurrent writes to sysfs files, if two
threads write contradictory values at the same time, the regmap updates and
the bd->props.scale updates could interleave. This might result in the
hardware being configured in one mode while bd->props.scale incorrectly
reports the opposite mode.
Would it make sense to protect this update sequence with a lock to ensure both
the hardware and software properties are updated atomically?
> +
> return len;
> }
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260617080031.99156-1-clamor95@gmail.com?part=13
^ permalink raw reply [flat|nested] 22+ messages in thread
* [PATCH v5 14/14] video: leds: backlight: lm3533: Support getting LED sources from DT
2026-06-17 8:00 [PATCH v5 00/14] mfd: lm3533: convert to OF bindings, improve support Svyatoslav Ryhel
` (12 preceding siblings ...)
2026-06-17 8:00 ` [PATCH v5 13/14] video: backlight: lm3533_bl: Implement backlight_scale property Svyatoslav Ryhel
@ 2026-06-17 8:00 ` Svyatoslav Ryhel
2026-06-17 8:18 ` sashiko-bot
13 siblings, 1 reply; 22+ messages in thread
From: Svyatoslav Ryhel @ 2026-06-17 8:00 UTC (permalink / raw)
To: Lee Jones, Daniel Thompson, Jingoo Han, Pavel Machek, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Jonathan Cameron,
David Lechner, Nuno Sá, Andy Shevchenko, Helge Deller,
Svyatoslav Ryhel
Cc: Johan Hovold, dri-devel, linux-leds, devicetree, linux-kernel,
linux-iio, linux-fbdev
Add Control Bank to HVLED/LVLED muxing support based on the led-sources
defined in the device tree.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
drivers/leds/leds-lm3533.c | 60 +++++++++++++++++++++++++++++
drivers/video/backlight/lm3533_bl.c | 45 ++++++++++++++++++++++
2 files changed, 105 insertions(+)
diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
index ed810c23f30f..9e07953814fd 100644
--- a/drivers/leds/leds-lm3533.c
+++ b/drivers/leds/leds-lm3533.c
@@ -27,6 +27,11 @@
#define LM3533_ALS_CHANNEL_LV_MIN 1
#define LM3533_ALS_CHANNEL_LV_MAX 2
+#define LM3533_REG_OUTPUT_CONF1 0x10
+#define OUTPUT_CONF1_SHIFT 2
+#define OUTPUT_LVLED_MASK 0x3
+#define LM3533_REG_OUTPUT_CONF2 0x11
+#define OUTPUT_CONF2_SHIFT 6
#define LM3533_REG_CTRLBANK_BCONF_BASE 0x1b
#define LM3533_REG_PATTERN_ENABLE 0x28
#define LM3533_REG_PATTERN_LOW_TIME_BASE 0x71
@@ -55,6 +60,9 @@ struct lm3533_led {
u32 max_current;
u32 pwm;
+ int num_leds;
+ u32 leds[LM3533_LVCTRLBANK_MAX];
+
bool have_als;
};
@@ -623,8 +631,36 @@ static const struct attribute_group *lm3533_led_attribute_groups[] = {
static int lm3533_led_setup(struct lm3533_led *led)
{
+ u32 output_cfg_shift = 0;
+ u32 output_cfg_val = 0;
+ u32 output_cfg_mask = 0;
int ret;
+ if (led->num_leds) {
+ for (int i = 0; i < led->num_leds; i++) {
+ if (led->leds[i] >= LM3533_LVCTRLBANK_MAX)
+ continue;
+
+ output_cfg_shift = led->leds[i] * 2;
+ output_cfg_val |= led->id << output_cfg_shift;
+ output_cfg_mask |= OUTPUT_LVLED_MASK << output_cfg_shift;
+ }
+
+ /* LVLED1, LVLED2 and LVLED3 */
+ ret = regmap_update_bits(led->regmap, LM3533_REG_OUTPUT_CONF1,
+ output_cfg_mask << OUTPUT_CONF1_SHIFT,
+ output_cfg_val << OUTPUT_CONF1_SHIFT);
+ if (ret)
+ return ret;
+
+ /* LVLED4 and LVLED5 */
+ ret = regmap_update_bits(led->regmap, LM3533_REG_OUTPUT_CONF2,
+ output_cfg_mask >> OUTPUT_CONF2_SHIFT,
+ output_cfg_val >> OUTPUT_CONF2_SHIFT);
+ if (ret)
+ return ret;
+ }
+
ret = lm3533_ctrlbank_set_max_current(&led->cb, led->max_current);
if (ret)
return ret;
@@ -699,6 +735,30 @@ static int lm3533_led_probe(struct platform_device *pdev)
device_property_read_u32(&pdev->dev, "ti,pwm-config-mask", &led->pwm);
+ /*
+ * If led-sources property is not set then either this Control Bank uses
+ * its default LVLED or is not linked to any LVLED at all.
+ */
+ led->num_leds = device_property_count_u32(&pdev->dev, "led-sources");
+ if (led->num_leds > LM3533_LVCTRLBANK_MAX) {
+ dev_err(&pdev->dev, "num of LED sources exceeds max %d: %d\n",
+ LM3533_LVCTRLBANK_MAX, led->num_leds);
+ ret = -EINVAL;
+ goto err_deregister;
+ }
+
+ if (led->num_leds < 0)
+ led->num_leds = 0;
+
+ if (led->num_leds > 0) {
+ ret = device_property_read_u32_array(&pdev->dev, "led-sources",
+ led->leds, led->num_leds);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to get led-sources\n");
+ goto err_deregister;
+ }
+ }
+
ret = lm3533_led_setup(led);
if (ret)
goto err_deregister;
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index c99fc68cb669..b3e5b3042d34 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -7,6 +7,7 @@
* Author: Johan Hovold <jhovold@gmail.com>
*/
+#include <linux/bits.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mod_devicetable.h>
@@ -22,6 +23,7 @@
#define LM3533_HVCTRLBANK_COUNT 2
#define LM3533_BL_MAX_BRIGHTNESS 255
+#define LM3533_REG_OUTPUT_CONF1 0x10
#define LM3533_REG_CTRLBANK_AB_BCONF 0x1a
#define CTRLBANK_AB_BCONF_ALS(n) BIT(2 * (n))
#define CTRLBANK_AB_BCONF_MODE(n) BIT(2 * (n) + 1)
@@ -36,6 +38,9 @@ struct lm3533_bl {
u32 max_current;
u32 pwm;
+ int num_leds;
+ u32 led_strings[LM3533_HVCTRLBANK_COUNT];
+
bool have_als;
bool linear;
};
@@ -237,6 +242,8 @@ static const struct attribute_group *lm3533_bl_attribute_groups[] = {
static int lm3533_bl_setup(struct lm3533_bl *bl)
{
int ctrlbank = lm3533_bl_get_ctrlbank_id(bl);
+ u32 output_cfg_val = 0;
+ u32 output_cfg_mask = 0;
int ret;
ret = regmap_assign_bits(bl->regmap, LM3533_REG_CTRLBANK_AB_BCONF,
@@ -244,6 +251,21 @@ static int lm3533_bl_setup(struct lm3533_bl *bl)
if (ret)
return ret;
+ if (bl->num_leds) {
+ for (int i = 0; i < bl->num_leds; i++) {
+ if (bl->led_strings[i] >= LM3533_HVCTRLBANK_COUNT)
+ continue;
+
+ output_cfg_val |= ctrlbank << bl->led_strings[i];
+ output_cfg_mask |= BIT(bl->led_strings[i]);
+ }
+
+ ret = regmap_update_bits(bl->regmap, LM3533_REG_OUTPUT_CONF1,
+ output_cfg_mask, output_cfg_val);
+ if (ret)
+ return ret;
+ }
+
ret = lm3533_ctrlbank_set_max_current(&bl->cb, bl->max_current);
if (ret)
return ret;
@@ -321,6 +343,29 @@ static int lm3533_bl_probe(struct platform_device *pdev)
device_property_read_u32(&pdev->dev, "ti,pwm-config-mask", &bl->pwm);
+ /*
+ * If led-sources property is not set then either this Control Bank uses
+ * its default HVLED or is not linked to any HVLED at all.
+ */
+ bl->num_leds = device_property_count_u32(&pdev->dev, "led-sources");
+ if (bl->num_leds > LM3533_HVCTRLBANK_COUNT) {
+ dev_err(&pdev->dev, "num of LED sources %d exceeds max %d\n",
+ bl->num_leds, LM3533_HVCTRLBANK_COUNT);
+ return -EINVAL;
+ }
+
+ if (bl->num_leds < 0)
+ bl->num_leds = 0;
+
+ if (bl->num_leds > 0) {
+ ret = device_property_read_u32_array(&pdev->dev, "led-sources",
+ bl->led_strings,
+ bl->num_leds);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "failed to get led-sources\n");
+ }
+
ret = lm3533_bl_setup(bl);
if (ret)
return ret;
--
2.53.0
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v5 14/14] video: leds: backlight: lm3533: Support getting LED sources from DT
2026-06-17 8:00 ` [PATCH v5 14/14] video: leds: backlight: lm3533: Support getting LED sources from DT Svyatoslav Ryhel
@ 2026-06-17 8:18 ` sashiko-bot
0 siblings, 0 replies; 22+ messages in thread
From: sashiko-bot @ 2026-06-17 8:18 UTC (permalink / raw)
To: Svyatoslav Ryhel; +Cc: devicetree, conor+dt, dri-devel, robh
Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Low] Out-of-bounds bitmask shift causes regcache pollution and unnecessary I2C bus writes for LM3533_REG_OUTPUT_CONF1.
--
commit a74553be2d2b60a05a193e9dc35527d3d4a425da
Author: Svyatoslav Ryhel <clamor95@gmail.com>
video: leds: backlight: lm3533: Support getting LED sources from DT
This commit adds Control Bank to HVLED/LVLED muxing support based on
the led-sources defined in the device tree.
> diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
> index ed810c23f30f3..9e07953814fdd 100644
> --- a/drivers/leds/leds-lm3533.c
> +++ b/drivers/leds/leds-lm3533.c
[ ... ]
> @@ -623,8 +631,36 @@ static const struct attribute_group *lm3533_led_attribute_groups[] = {
>
> static int lm3533_led_setup(struct lm3533_led *led)
> {
> + u32 output_cfg_shift = 0;
> + u32 output_cfg_val = 0;
> + u32 output_cfg_mask = 0;
> int ret;
>
> + if (led->num_leds) {
> + for (int i = 0; i < led->num_leds; i++) {
> + if (led->leds[i] >= LM3533_LVCTRLBANK_MAX)
> + continue;
> +
> + output_cfg_shift = led->leds[i] * 2;
> + output_cfg_val |= led->id << output_cfg_shift;
> + output_cfg_mask |= OUTPUT_LVLED_MASK << output_cfg_shift;
> + }
> +
> + /* LVLED1, LVLED2 and LVLED3 */
> + ret = regmap_update_bits(led->regmap, LM3533_REG_OUTPUT_CONF1,
> + output_cfg_mask << OUTPUT_CONF1_SHIFT,
> + output_cfg_val << OUTPUT_CONF1_SHIFT);
[Severity: Low]
Can this shift cause bits to fall outside the 8-bit register width?
When led-sources specifies LVLED4 or LVLED5, output_cfg_mask accumulates
bits that, when shifted left by OUTPUT_CONF1_SHIFT (which is 2), will exceed
8 bits (for example, forming masks like 0x300 or 0xC00).
Because regmap_update_bits operates on unsigned int internally, these
out-of-bounds bits are applied to the cached register value. This causes
the internal comparison (tmp != orig) to incorrectly evaluate to true,
triggering an unnecessary I2C write.
Although the I2C subsystem harmlessly truncates the value to 8 bits so the
hardware state is not corrupted, does it make sense to apply an explicit
8-bit mask (e.g., & 0xFF) before passing the shifted mask and value to
regmap_update_bits() to prevent regcache pollution and redundant bus traffic?
> + if (ret)
> + return ret;
> +
> + /* LVLED4 and LVLED5 */
> + ret = regmap_update_bits(led->regmap, LM3533_REG_OUTPUT_CONF2,
> + output_cfg_mask >> OUTPUT_CONF2_SHIFT,
> + output_cfg_val >> OUTPUT_CONF2_SHIFT);
> + if (ret)
> + return ret;
> + }
[ ... ]
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260617080031.99156-1-clamor95@gmail.com?part=14
^ permalink raw reply [flat|nested] 22+ messages in thread