* [PATCH 1/6] regulator: lm363x: Make the gpio register enable flexible
2019-04-05 14:55 [PATCH 0/6] LM36274 LMU Introduction Dan Murphy
@ 2019-04-05 14:55 ` Dan Murphy
2019-04-09 18:44 ` Jacek Anaszewski
2019-04-05 14:55 ` [PATCH 2/6] dt-bindings: mfd: Add lm36274 bindings to ti-lmu Dan Murphy
` (4 subsequent siblings)
5 siblings, 1 reply; 10+ messages in thread
From: Dan Murphy @ 2019-04-05 14:55 UTC (permalink / raw)
To: robh+dt, jacek.anaszewski, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds, Dan Murphy
The use of and enablement of the GPIO can be used across devices.
Use the enable_reg in the regulator descriptor for the register to
write.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/regulator/lm363x-regulator.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
index c876e161052a..382b1cecdd93 100644
--- a/drivers/regulator/lm363x-regulator.c
+++ b/drivers/regulator/lm363x-regulator.c
@@ -263,8 +263,8 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
if (gpiod) {
cfg.ena_gpiod = gpiod;
-
- ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
+ ret = regmap_update_bits(regmap,
+ lm363x_regulator_desc[id].enable_reg,
LM3632_EXT_EN_MASK,
LM3632_EXT_EN_MASK);
if (ret) {
--
2.19.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* Re: [PATCH 1/6] regulator: lm363x: Make the gpio register enable flexible
2019-04-05 14:55 ` [PATCH 1/6] regulator: lm363x: Make the gpio register enable flexible Dan Murphy
@ 2019-04-09 18:44 ` Jacek Anaszewski
0 siblings, 0 replies; 10+ messages in thread
From: Jacek Anaszewski @ 2019-04-09 18:44 UTC (permalink / raw)
To: Dan Murphy, robh+dt, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds
Hi Dan,
Regulator maintainers should be added too.
On 4/5/19 4:55 PM, Dan Murphy wrote:
> The use of and enablement of the GPIO can be used across devices.
> Use the enable_reg in the regulator descriptor for the register to
> write.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
> drivers/regulator/lm363x-regulator.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
> index c876e161052a..382b1cecdd93 100644
> --- a/drivers/regulator/lm363x-regulator.c
> +++ b/drivers/regulator/lm363x-regulator.c
> @@ -263,8 +263,8 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
>
> if (gpiod) {
> cfg.ena_gpiod = gpiod;
> -
> - ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
> + ret = regmap_update_bits(regmap,
> + lm363x_regulator_desc[id].enable_reg,
> LM3632_EXT_EN_MASK,
> LM3632_EXT_EN_MASK);
> if (ret) {
>
--
Best regards,
Jacek Anaszewski
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 2/6] dt-bindings: mfd: Add lm36274 bindings to ti-lmu
2019-04-05 14:55 [PATCH 0/6] LM36274 LMU Introduction Dan Murphy
2019-04-05 14:55 ` [PATCH 1/6] regulator: lm363x: Make the gpio register enable flexible Dan Murphy
@ 2019-04-05 14:55 ` Dan Murphy
2019-04-05 14:55 ` [PATCH 3/6] mfd: ti-lmu: Add LM36274 support to the ti-lmu Dan Murphy
` (3 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: Dan Murphy @ 2019-04-05 14:55 UTC (permalink / raw)
To: robh+dt, jacek.anaszewski, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds, Dan Murphy
Add the LM36274 backlight driver with regulator support.
This is a multi-function device for backlight applications.
Backlight properties will be documented in it's a supplemental
bindings document.
Regulator support is documented in the regulator/lm363x-regulator.txt
http://www.ti.com/lit/ds/symlink/lm36274.pdf
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
.../devicetree/bindings/mfd/ti-lmu.txt | 54 +++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
index a948a8f41b2c..6ada671c1038 100644
--- a/Documentation/devicetree/bindings/mfd/ti-lmu.txt
+++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
@@ -8,6 +8,7 @@ TI LMU driver supports lighting devices below.
LM3632 Backlight and regulator
LM3633 Backlight, LED and fault monitor
LM3695 Backlight
+ LM36274 Backlight and regulator
Required properties:
- compatible: Should be one of:
@@ -15,11 +16,13 @@ Required properties:
"ti,lm3632"
"ti,lm3633"
"ti,lm3695"
+ "ti,lm36274"
- reg: I2C slave address.
0x11 for LM3632
0x29 for LM3631
0x36 for LM3633
0x63 for LM3695
+ 0x11 for LM36274
Optional property:
- enable-gpios: A GPIO specifier for hardware enable pin.
@@ -50,12 +53,14 @@ Optional nodes:
- compatible: Should be one of:
"ti,lm3633-fault-monitor"
- leds: LED properties for LM3633. Please refer to [2].
+ LED properties for LM36274. Please refer to [4].
- regulators: Regulator properties for LM3631 and LM3632.
Please refer to [3].
[1] ../leds/backlight/ti-lmu-backlight.txt
[2] ../leds/leds-lm3633.txt
[3] ../regulator/lm363x-regulator.txt
+[4] ../leds/leds-lm36274.txt
lm3631@29 {
compatible = "ti,lm3631";
@@ -213,3 +218,52 @@ lm3695@63 {
};
};
};
+
+lm36274@11 {
+ compatible = "ti,lm36274";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x11>;
+
+ enable-gpios = <&pioC 2 GPIO_ACTIVE_HIGH>;
+ regulators {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lm363x-regulator";
+
+ enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
+ <&pioC 1 GPIO_ACTIVE_HIGH>;
+
+ vboost {
+ regulator-name = "lcd_boost";
+ regulator-min-microvolt = <4000000>;
+ regulator-max-microvolt = <7150000>;
+ regulator-always-on;
+ };
+
+ vpos {
+ regulator-name = "lcd_vpos";
+ regulator-min-microvolt = <4000000>;
+ regulator-max-microvolt = <6500000>;
+ };
+
+ vneg {
+ regulator-name = "lcd_vneg";
+ regulator-min-microvolt = <4000000>;
+ regulator-max-microvolt = <6500000>;
+ };
+ };
+
+ backlight {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lm36274-backlight";
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 2>;
+ label = "white:backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+ };
+};
--
2.19.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 3/6] mfd: ti-lmu: Add LM36274 support to the ti-lmu
2019-04-05 14:55 [PATCH 0/6] LM36274 LMU Introduction Dan Murphy
2019-04-05 14:55 ` [PATCH 1/6] regulator: lm363x: Make the gpio register enable flexible Dan Murphy
2019-04-05 14:55 ` [PATCH 2/6] dt-bindings: mfd: Add lm36274 bindings to ti-lmu Dan Murphy
@ 2019-04-05 14:55 ` Dan Murphy
2019-04-05 14:55 ` [PATCH 4/6] regulator: lm363x: Add support for LM36274 Dan Murphy
` (2 subsequent siblings)
5 siblings, 0 replies; 10+ messages in thread
From: Dan Murphy @ 2019-04-05 14:55 UTC (permalink / raw)
To: robh+dt, jacek.anaszewski, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds, Dan Murphy
Add the LM36274 register support to the ti-lmu MFD driver.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/mfd/Kconfig | 5 ++---
drivers/mfd/ti-lmu.c | 14 ++++++++++++++
include/linux/mfd/ti-lmu-register.h | 23 +++++++++++++++++++++++
include/linux/mfd/ti-lmu.h | 4 ++++
4 files changed, 43 insertions(+), 3 deletions(-)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index fcae244229b3..5606411038bb 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1311,9 +1311,8 @@ config MFD_TI_LMU
select REGMAP_I2C
help
Say yes here to enable support for TI LMU chips.
-
- TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, and LM3695.
- It consists of backlight, LED and regulator driver.
+ TI LMU MFD supports LM3532, LM3631, LM3632, LM3633, LM3695 and
+ LM36274. It consists of backlight, LED and regulator driver.
It provides consistent device controls for lighting functions.
config MFD_OMAP_USB_HOST
diff --git a/drivers/mfd/ti-lmu.c b/drivers/mfd/ti-lmu.c
index 89b1c5b584af..691ab9dd6236 100644
--- a/drivers/mfd/ti-lmu.c
+++ b/drivers/mfd/ti-lmu.c
@@ -111,6 +111,17 @@ static const struct mfd_cell lm3695_devices[] = {
},
};
+static const struct mfd_cell lm36274_devices[] = {
+ LM363X_REGULATOR(LM36274_BOOST),
+ LM363X_REGULATOR(LM36274_LDO_POS),
+ LM363X_REGULATOR(LM36274_LDO_NEG),
+ {
+ .name = "lm36274-leds",
+ .id = LM36274,
+ .of_compatible = "ti,lm36274-backlight",
+ },
+};
+
#define TI_LMU_DATA(chip, max_reg) \
static const struct ti_lmu_data chip##_data = \
{ \
@@ -123,6 +134,7 @@ TI_LMU_DATA(lm3631, LM3631_MAX_REG);
TI_LMU_DATA(lm3632, LM3632_MAX_REG);
TI_LMU_DATA(lm3633, LM3633_MAX_REG);
TI_LMU_DATA(lm3695, LM3695_MAX_REG);
+TI_LMU_DATA(lm36274, LM36274_MAX_REG);
static int ti_lmu_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
@@ -191,6 +203,7 @@ static const struct of_device_id ti_lmu_of_match[] = {
{ .compatible = "ti,lm3632", .data = &lm3632_data },
{ .compatible = "ti,lm3633", .data = &lm3633_data },
{ .compatible = "ti,lm3695", .data = &lm3695_data },
+ { .compatible = "ti,lm36274", .data = &lm36274_data },
{ }
};
MODULE_DEVICE_TABLE(of, ti_lmu_of_match);
@@ -200,6 +213,7 @@ static const struct i2c_device_id ti_lmu_ids[] = {
{ "lm3632", LM3632 },
{ "lm3633", LM3633 },
{ "lm3695", LM3695 },
+ { "lm36274", LM36274 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ti_lmu_ids);
diff --git a/include/linux/mfd/ti-lmu-register.h b/include/linux/mfd/ti-lmu-register.h
index 76998b01764b..076d8dea38fd 100644
--- a/include/linux/mfd/ti-lmu-register.h
+++ b/include/linux/mfd/ti-lmu-register.h
@@ -189,4 +189,27 @@
#define LM3695_REG_BRT_MSB 0x14
#define LM3695_MAX_REG 0x14
+
+/* LM36274 */
+#define LM36274_REG_REV 0x01
+#define LM36274_REG_BL_CFG_1 0x02
+#define LM36274_REG_BL_CFG_2 0x03
+#define LM36274_REG_BRT_LSB 0x04
+#define LM36274_REG_BRT_MSB 0x05
+#define LM36274_REG_BL_EN 0x08
+
+#define LM36274_REG_BIAS_CONFIG_1 0x09
+#define LM36274_EXT_EN_MASK BIT(0)
+#define LM36274_EN_VNEG_MASK BIT(1)
+#define LM36274_EN_VPOS_MASK BIT(2)
+
+#define LM36274_REG_BIAS_CONFIG_2 0x0a
+#define LM36274_REG_BIAS_CONFIG_3 0x0b
+#define LM36274_REG_VOUT_BOOST 0x0c
+#define LM36274_REG_VOUT_POS 0x0d
+#define LM36274_REG_VOUT_NEG 0x0e
+#define LM36274_VOUT_MASK 0x3F
+
+#define LM36274_MAX_REG 0x13
+
#endif
diff --git a/include/linux/mfd/ti-lmu.h b/include/linux/mfd/ti-lmu.h
index 54e9d272e81c..0957598c7d41 100644
--- a/include/linux/mfd/ti-lmu.h
+++ b/include/linux/mfd/ti-lmu.h
@@ -26,6 +26,7 @@ enum ti_lmu_id {
LM3632,
LM3633,
LM3695,
+ LM36274,
LMU_MAX_ID,
};
@@ -67,6 +68,9 @@ enum lm363x_regulator_id {
LM3632_BOOST, /* Boost output */
LM3632_LDO_POS, /* Positive display bias output */
LM3632_LDO_NEG, /* Negative display bias output */
+ LM36274_BOOST, /* Boost output */
+ LM36274_LDO_POS, /* Positive display bias output */
+ LM36274_LDO_NEG, /* Negative display bias output */
};
/**
--
2.19.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 4/6] regulator: lm363x: Add support for LM36274
2019-04-05 14:55 [PATCH 0/6] LM36274 LMU Introduction Dan Murphy
` (2 preceding siblings ...)
2019-04-05 14:55 ` [PATCH 3/6] mfd: ti-lmu: Add LM36274 support to the ti-lmu Dan Murphy
@ 2019-04-05 14:55 ` Dan Murphy
2019-04-05 14:55 ` [PATCH 5/6] dt-bindings: leds: Add LED bindings for the LM36274 Dan Murphy
2019-04-05 14:55 ` [PATCH 6/6] leds: lm36274: Introduce the TI LM36274 LED driver Dan Murphy
5 siblings, 0 replies; 10+ messages in thread
From: Dan Murphy @ 2019-04-05 14:55 UTC (permalink / raw)
To: robh+dt, jacek.anaszewski, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds, Dan Murphy
Adding regulator support for the LM36274 backlight driver.
This device can leverage this existing code as the functionality
and registers are common enough between the LM36274 and the LM363x
series of devices.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/regulator/Kconfig | 2 +-
drivers/regulator/lm363x-regulator.c | 52 ++++++++++++++++++++++++++++
2 files changed, 53 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index b7f249ee5e68..23252ae81fdf 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -362,7 +362,7 @@ config REGULATOR_LM363X
tristate "TI LM363X voltage regulators"
depends on MFD_TI_LMU
help
- This driver supports LM3631 and LM3632 voltage regulators for
+ This driver supports LM3631, LM3632 and LM36274 voltage regulators for
the LCD bias.
One boost output voltage is configurable and always on.
Other LDOs are used for the display module.
diff --git a/drivers/regulator/lm363x-regulator.c b/drivers/regulator/lm363x-regulator.c
index 382b1cecdd93..1944677b1448 100644
--- a/drivers/regulator/lm363x-regulator.c
+++ b/drivers/regulator/lm363x-regulator.c
@@ -37,6 +37,11 @@
#define LM3632_VBOOST_MIN 4500000
#define LM3632_VLDO_MIN 4000000
+/* LM36274 */
+#define LM36274_BOOST_VSEL_MAX 0x3f
+#define LM36274_LDO_VSEL_MAX 0x34
+#define LM36274_VOLTAGE_MIN 4000000
+
/* Common */
#define LM363X_STEP_50mV 50000
#define LM363X_STEP_500mV 500000
@@ -217,6 +222,51 @@ static const struct regulator_desc lm363x_regulator_desc[] = {
.enable_reg = LM3632_REG_BIAS_CONFIG,
.enable_mask = LM3632_EN_VNEG_MASK,
},
+
+ /* LM36274 */
+ {
+ .name = "vboost",
+ .of_match = "vboost",
+ .id = LM36274_BOOST,
+ .ops = &lm363x_boost_voltage_table_ops,
+ .n_voltages = LM36274_BOOST_VSEL_MAX,
+ .min_uV = LM36274_VOLTAGE_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM36274_REG_VOUT_BOOST,
+ .vsel_mask = LM36274_VOUT_MASK,
+ },
+ {
+ .name = "ldo_vpos",
+ .of_match = "vpos",
+ .id = LM36274_LDO_POS,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM36274_LDO_VSEL_MAX,
+ .min_uV = LM36274_VOLTAGE_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM36274_REG_VOUT_POS,
+ .vsel_mask = LM36274_VOUT_MASK,
+ .enable_reg = LM36274_REG_BIAS_CONFIG_1,
+ .enable_mask = LM36274_EN_VPOS_MASK,
+ },
+ {
+ .name = "ldo_vneg",
+ .of_match = "vneg",
+ .id = LM36274_LDO_NEG,
+ .ops = &lm363x_regulator_voltage_table_ops,
+ .n_voltages = LM36274_LDO_VSEL_MAX,
+ .min_uV = LM36274_VOLTAGE_MIN,
+ .uV_step = LM363X_STEP_50mV,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ .vsel_reg = LM36274_REG_VOUT_NEG,
+ .vsel_mask = LM36274_VOUT_MASK,
+ .enable_reg = LM36274_REG_BIAS_CONFIG_1,
+ .enable_mask = LM36274_EN_VNEG_MASK,
+ },
};
static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
@@ -229,9 +279,11 @@ static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev,
*/
switch (id) {
case LM3632_LDO_POS:
+ case LM36274_LDO_POS:
return gpiod_get_index_optional(dev, "enable", 0,
GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
case LM3632_LDO_NEG:
+ case LM36274_LDO_NEG:
return gpiod_get_index_optional(dev, "enable", 1,
GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
default:
--
2.19.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 5/6] dt-bindings: leds: Add LED bindings for the LM36274
2019-04-05 14:55 [PATCH 0/6] LM36274 LMU Introduction Dan Murphy
` (3 preceding siblings ...)
2019-04-05 14:55 ` [PATCH 4/6] regulator: lm363x: Add support for LM36274 Dan Murphy
@ 2019-04-05 14:55 ` Dan Murphy
2019-04-08 10:10 ` Pavel Machek
2019-04-05 14:55 ` [PATCH 6/6] leds: lm36274: Introduce the TI LM36274 LED driver Dan Murphy
5 siblings, 1 reply; 10+ messages in thread
From: Dan Murphy @ 2019-04-05 14:55 UTC (permalink / raw)
To: robh+dt, jacek.anaszewski, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds, Dan Murphy
Add the LM36274 LED specific bindings.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
.../devicetree/bindings/leds/leds-lm36274.txt | 82 +++++++++++++++++++
1 file changed, 82 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/leds-lm36274.txt
diff --git a/Documentation/devicetree/bindings/leds/leds-lm36274.txt b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
new file mode 100644
index 000000000000..359990d85b28
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
@@ -0,0 +1,82 @@
+* Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias
+
+The LM36274 is an integrated four-channel WLED driver and LCD bias supply.
+The backlight boost provides the power to bias four parallel LED strings with
+up to 29-V total output voltage. The 11-bit LED current is programmable via
+the I2C bus and/or controlled via a logic level PWM input from 60 μA to 30 mA.
+
+Parent device properties are documented in ../mfd/ti_lmu.txt
+Regulator properties are documented in ../regulator/lm363x-regulator.txt
+
+Required backlight properties:
+ - compatible:
+ "ti,lm36274-backlight"
+ - reg : 0
+ - #address-cells : 1
+ - #size-cells : 0
+ - led-sources : Indicates which LED strings will be enabled.
+ Values from 0-3, sources is 0 based so strings will be
+ source value + 1.
+
+Optional backlight properties:
+ - label : see Documentation/devicetree/bindings/leds/common.txt
+ - linux,default-trigger :
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+HVLED string 1 and 3 are controlled by control bank A and HVLED 2 string is
+controlled by control bank B.
+
+lm36274@11 {
+ compatible = "ti,lm36274";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x11>;
+
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+
+ regulators {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lm363x-regulator";
+
+ enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
+ <&pioC 1 GPIO_ACTIVE_HIGH>;
+
+ vboost {
+ regulator-name = "lcd_boost";
+ regulator-min-microvolt = <4000000>;
+ regulator-max-microvolt = <7150000>;
+ regulator-always-on;
+ };
+
+ vpos {
+ regulator-name = "lcd_vpos";
+ regulator-min-microvolt = <4000000>;
+ regulator-max-microvolt = <6500000>;
+ };
+
+ vneg {
+ regulator-name = "lcd_vneg";
+ regulator-min-microvolt = <4000000>;
+ regulator-max-microvolt = <6500000>;
+ };
+ };
+
+ backlight {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "ti,lm36274-backlight";
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 2>;
+ label = "white:backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+ };
+};
+
+For more product information please see the link below:
+http://www.ti.com/lit/ds/symlink/lm36274.pdf
--
2.19.0
^ permalink raw reply related [flat|nested] 10+ messages in thread* Re: [PATCH 5/6] dt-bindings: leds: Add LED bindings for the LM36274
2019-04-05 14:55 ` [PATCH 5/6] dt-bindings: leds: Add LED bindings for the LM36274 Dan Murphy
@ 2019-04-08 10:10 ` Pavel Machek
2019-04-10 11:37 ` Dan Murphy
0 siblings, 1 reply; 10+ messages in thread
From: Pavel Machek @ 2019-04-08 10:10 UTC (permalink / raw)
To: Dan Murphy
Cc: robh+dt, jacek.anaszewski, lee.jones, devicetree, linux-kernel,
linux-leds
[-- Attachment #1: Type: text/plain, Size: 1130 bytes --]
On Fri 2019-04-05 09:55:39, Dan Murphy wrote:
> Add the LM36274 LED specific bindings.
>
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
> .../devicetree/bindings/leds/leds-lm36274.txt | 82 +++++++++++++++++++
> 1 file changed, 82 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/leds/leds-lm36274.txt
>
> diff --git a/Documentation/devicetree/bindings/leds/leds-lm36274.txt b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
> new file mode 100644
> index 000000000000..359990d85b28
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
> @@ -0,0 +1,82 @@
> +* Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias
> +
> +The LM36274 is an integrated four-channel WLED driver and LCD bias supply.
> +The backlight boost provides the power to bias four parallel LED strings with
> +up to 29-V total output voltage. The 11-bit LED current is rogrammable via
29V
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 181 bytes --]
^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH 5/6] dt-bindings: leds: Add LED bindings for the LM36274
2019-04-08 10:10 ` Pavel Machek
@ 2019-04-10 11:37 ` Dan Murphy
0 siblings, 0 replies; 10+ messages in thread
From: Dan Murphy @ 2019-04-10 11:37 UTC (permalink / raw)
To: Pavel Machek
Cc: robh+dt, jacek.anaszewski, lee.jones, devicetree, linux-kernel,
linux-leds
Pavel
On 4/8/19 5:10 AM, Pavel Machek wrote:
> On Fri 2019-04-05 09:55:39, Dan Murphy wrote:
>> Add the LM36274 LED specific bindings.
>>
>> Signed-off-by: Dan Murphy <dmurphy@ti.com>
>> ---
>> .../devicetree/bindings/leds/leds-lm36274.txt | 82 +++++++++++++++++++
>> 1 file changed, 82 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/leds/leds-lm36274.txt
>>
>> diff --git a/Documentation/devicetree/bindings/leds/leds-lm36274.txt b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
>> new file mode 100644
>> index 000000000000..359990d85b28
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
>> @@ -0,0 +1,82 @@
>> +* Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias
>> +
>> +The LM36274 is an integrated four-channel WLED driver and LCD bias supply.
>> +The backlight boost provides the power to bias four parallel LED strings with
>> +up to 29-V total output voltage. The 11-bit LED current is rogrammable via
> 29V
>
Ack
> Pavel
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH 6/6] leds: lm36274: Introduce the TI LM36274 LED driver
2019-04-05 14:55 [PATCH 0/6] LM36274 LMU Introduction Dan Murphy
` (4 preceding siblings ...)
2019-04-05 14:55 ` [PATCH 5/6] dt-bindings: leds: Add LED bindings for the LM36274 Dan Murphy
@ 2019-04-05 14:55 ` Dan Murphy
5 siblings, 0 replies; 10+ messages in thread
From: Dan Murphy @ 2019-04-05 14:55 UTC (permalink / raw)
To: robh+dt, jacek.anaszewski, pavel, lee.jones
Cc: devicetree, linux-kernel, linux-leds, Dan Murphy
Introduce the LM36274 LED driver. This driver uses the ti-lmu
MFD driver to probe this LED driver. The driver configures only the
LED registers and enables the outputs according to the config file.
The driver utilizes the ti-lmu-led-common framework to set the brightness
bits.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
drivers/leds/Kconfig | 9 +-
drivers/leds/Makefile | 1 +
drivers/leds/leds-lm36274.c | 174 ++++++++++++++++++++++++++++++++++++
3 files changed, 183 insertions(+), 1 deletion(-)
create mode 100644 drivers/leds/leds-lm36274.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 2d1576f4d5d6..c0bf59544886 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -783,12 +783,19 @@ config LEDS_LM3697
Say Y to enable the LM3697 LED driver for TI LMU devices.
This supports the LED device LM3697.
+config LEDS_LM36274
+ tristate "LED driver for LM36274"
+ depends on LEDS_TI_LMU_COMMON
+ help
+ Say Y to enable the LM36274 LED driver for TI LMU devices.
+ This supports the LED device LM36274.
+
config LEDS_TI_LMU_COMMON
tristate "LED driver for TI LMU"
help
Say Y to enable the LED driver for TI LMU devices.
This supports common features between the TI LM3532, LM3631, LM3632,
- LM3633, LM3695 and LM3697.
+ LM3633, LM3695, LM3697 and LM36274
comment "LED Triggers"
source "drivers/leds/trigger/Kconfig"
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 2eb0225d8dc6..7ff67215b38c 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -81,6 +81,7 @@ obj-$(CONFIG_LEDS_LM3692X) += leds-lm3692x.o
obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o
obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o
+obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o
obj-$(CONFIG_LEDS_TI_LMU_COMMON) += ti-lmu-led-common.o
# LED SPI Drivers
diff --git a/drivers/leds/leds-lm36274.c b/drivers/leds/leds-lm36274.c
new file mode 100644
index 000000000000..6a419c47c47f
--- /dev/null
+++ b/drivers/leds/leds-lm36274.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM36274 LED chip family driver
+// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/leds.h>
+#include <linux/ti-lmu-led-common.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/ti-lmu.h>
+#include <linux/mfd/ti-lmu-register.h>
+
+#include <uapi/linux/uleds.h>
+
+#define LM36274_MAX_STRINGS 4
+#define LM36274_BL_EN BIT(4)
+
+/**
+ * struct lm36274
+ * @pdev: platform device
+ * @led_dev: led class device
+ * @lmu_data: Register and setting values for common code
+ * @regmap: Devices register map
+ * @dev: Pointer to the devices device struct
+ * @led_sources - The LED strings supported in this array
+ * @num_leds - Number of LED strings are supported in this array
+ */
+struct lm36274 {
+ struct platform_device *pdev;
+ struct led_classdev led_dev;
+ struct ti_lmu_bank lmu_data;
+ struct regmap *regmap;
+ struct device *dev;
+
+ u32 led_sources[LM36274_MAX_STRINGS];
+ int num_leds;
+};
+
+static int lm36274_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lm36274 *led = container_of(led_cdev, struct lm36274, led_dev);
+
+ return ti_lmu_common_set_brightness(&led->lmu_data, brt_val);
+}
+
+static int lm36274_init(struct lm36274 *lm36274_data)
+{
+ int enable_val = 0;
+ int i;
+
+ for (i = 0; i < lm36274_data->num_leds; i++)
+ enable_val |= (1 << lm36274_data->led_sources[i]);
+
+ if (!enable_val) {
+ dev_err(lm36274_data->dev, "No LEDs were enabled\n");
+ return -EINVAL;
+ }
+
+ enable_val |= LM36274_BL_EN;
+
+ return regmap_write(lm36274_data->regmap, LM36274_REG_BL_EN,
+ enable_val);
+}
+
+static int lm36274_parse_dt(struct lm36274 *lm36274_data)
+{
+ struct fwnode_handle *child = NULL;
+ char label[LED_MAX_NAME_SIZE];
+ struct device *dev = &lm36274_data->pdev->dev;
+ const char *name;
+ int child_cnt;
+ int ret = -EINVAL;
+
+ /* There should only be 1 node */
+ child_cnt = device_get_child_node_count(dev);
+ if (child_cnt != 1)
+ return ret;
+
+ device_for_each_child_node(dev, child) {
+ ret = fwnode_property_read_string(child, "label", &name);
+ if (ret)
+ snprintf(label, sizeof(label),
+ "%s::", lm36274_data->pdev->name);
+ else
+ snprintf(label, sizeof(label),
+ "%s:%s", lm36274_data->pdev->name, name);
+
+ lm36274_data->num_leds = fwnode_property_read_u32_array(child,
+ "led-sources",
+ NULL, 0);
+ if (lm36274_data->num_leds <= 0)
+ return -ENODEV;
+
+ ret = fwnode_property_read_u32_array(child, "led-sources",
+ lm36274_data->led_sources,
+ lm36274_data->num_leds);
+ if (ret) {
+ dev_err(dev, "led-sources property missing\n");
+ return -EINVAL;
+ }
+
+ fwnode_property_read_string(child, "linux,default-trigger",
+ &lm36274_data->led_dev.default_trigger);
+
+ }
+
+ lm36274_data->lmu_data.regmap = lm36274_data->regmap;
+ lm36274_data->lmu_data.max_brightness = MAX_BRIGHTNESS_11BIT;
+ lm36274_data->lmu_data.msb_brightness_reg = LM36274_REG_BRT_MSB;
+ lm36274_data->lmu_data.lsb_brightness_reg = LM36274_REG_BRT_LSB;
+
+ lm36274_data->led_dev.name = label;
+ lm36274_data->led_dev.max_brightness = MAX_BRIGHTNESS_11BIT;
+ lm36274_data->led_dev.brightness_set_blocking = lm36274_brightness_set;
+
+ return ret;
+}
+
+static int lm36274_probe(struct platform_device *pdev)
+{
+ struct ti_lmu *lmu = dev_get_drvdata(pdev->dev.parent);
+ struct lm36274 *lm36274_data;
+ int ret;
+
+ lm36274_data = devm_kzalloc(&pdev->dev, sizeof(*lm36274_data),
+ GFP_KERNEL);
+ if (!lm36274_data) {
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ lm36274_data->pdev = pdev;
+ lm36274_data->dev = lmu->dev;
+ lm36274_data->regmap = lmu->regmap;
+ dev_set_drvdata(&pdev->dev, lm36274_data);
+
+ ret = lm36274_parse_dt(lm36274_data);
+ if (ret) {
+ dev_err(lm36274_data->dev, "Failed to parse DT node\n");
+ return ret;
+ }
+
+ ret = lm36274_init(lm36274_data);
+ if (ret) {
+ dev_err(lm36274_data->dev, "Failed to init the device\n");
+ return ret;
+ }
+
+ return devm_led_classdev_register(lm36274_data->dev,
+ &lm36274_data->led_dev);
+}
+
+static const struct of_device_id of_lm36274_leds_match[] = {
+ { .compatible = "ti,lm36274-backlight", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lm36274_leds_match);
+
+static struct platform_driver lm36274_driver = {
+ .probe = lm36274_probe,
+ .driver = {
+ .name = "lm36274-leds",
+ },
+};
+module_platform_driver(lm36274_driver)
+
+MODULE_DESCRIPTION("Texas Instruments LM36274 LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
--
2.19.0
^ permalink raw reply related [flat|nested] 10+ messages in thread