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-rw-r--r--Documentation/devicetree/bindings/leds/leds-lm36274.txt85
-rw-r--r--Documentation/devicetree/bindings/leds/leds-lm3697.txt73
-rw-r--r--Documentation/devicetree/bindings/mfd/ti-lmu.txt88
-rw-r--r--drivers/leds/Kconfig25
-rw-r--r--drivers/leds/Makefile3
-rw-r--r--drivers/leds/leds-lm36274.c172
-rw-r--r--drivers/leds/leds-lm3697.c395
-rw-r--r--drivers/leds/leds-ti-lmu-common.c156
-rw-r--r--drivers/mfd/Kconfig5
-rw-r--r--drivers/mfd/ti-lmu.c23
-rw-r--r--drivers/regulator/Kconfig2
-rw-r--r--drivers/regulator/lm363x-regulator.c78
-rw-r--r--include/linux/leds-ti-lmu-common.h47
-rw-r--r--include/linux/mfd/ti-lmu-register.h63
-rw-r--r--include/linux/mfd/ti-lmu.h5
15 files changed, 1135 insertions, 85 deletions
diff --git a/Documentation/devicetree/bindings/leds/leds-lm36274.txt b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
new file mode 100644
index 000000000000..456a589c65f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-lm36274.txt
@@ -0,0 +1,85 @@
+* 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 29V 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 uA to 30 mA.
+
+Parent device properties are documented in
+Documentation/devicetree/bindings/mfd/ti_lmu.txt
+
+Regulator properties are documented in
+Documentation/devicetree/bindings/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
diff --git a/Documentation/devicetree/bindings/leds/leds-lm3697.txt b/Documentation/devicetree/bindings/leds/leds-lm3697.txt
new file mode 100644
index 000000000000..63992d732959
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-lm3697.txt
@@ -0,0 +1,73 @@
+* Texas Instruments - LM3697 Highly Efficient White LED Driver
+
+The LM3697 11-bit LED driver provides high-
+performance backlight dimming for 1, 2, or 3 series
+LED strings while delivering up to 90% efficiency.
+
+This device is suitable for display and keypad lighting
+
+Required properties:
+ - compatible:
+ "ti,lm3697"
+ - reg : I2C slave address
+ - #address-cells : 1
+ - #size-cells : 0
+
+Optional properties:
+ - enable-gpios : GPIO pin to enable/disable the device
+ - vled-supply : LED supply
+
+Required child properties:
+ - reg : 0 - LED is Controlled by bank A
+ 1 - LED is Controlled by bank B
+ - led-sources : Indicates which HVLED string is associated to which
+ control bank. This is a zero based property so
+ HVLED1 = 0, HVLED2 = 1, HVLED3 = 2.
+ Additional information is contained
+ in Documentation/devicetree/bindings/leds/common.txt
+
+Optional child properties:
+ - ti,brightness-resolution - see Documentation/devicetree/bindings/mfd/ti-lmu.txt
+ - ramp-up-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
+ - ramp-down-us: see Documentation/devicetree/bindings/mfd/ti-lmu.txt
+ - 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.
+
+led-controller@36 {
+ compatible = "ti,lm3697";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x36>;
+
+ enable-gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
+ vled-supply = <&vbatt>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 2>;
+ ti,brightness-resolution = <2047>;
+ ramp-up-us = <5000>;
+ ramp-down-us = <1000>;
+ label = "white:first_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+
+ led@1 {
+ reg = <1>;
+ led-sources = <1>;
+ ti,brightness-resolution = <255>;
+ ramp-up-us = <500>;
+ ramp-down-us = <1000>;
+ label = "white:second_backlight_cluster";
+ linux,default-trigger = "backlight";
+ };
+}
+
+For more product information please see the link below:
+http://www.ti.com/lit/ds/symlink/lm3697.pdf
diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
index 86ca786d54fc..2296b8f24de4 100644
--- a/Documentation/devicetree/bindings/mfd/ti-lmu.txt
+++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
@@ -8,7 +8,7 @@ TI LMU driver supports lighting devices below.
LM3632 Backlight and regulator
LM3633 Backlight, LED and fault monitor
LM3695 Backlight
- LM3697 Backlight and fault monitor
+ LM36274 Backlight and regulator
Required properties:
- compatible: Should be one of:
@@ -16,15 +16,32 @@ Required properties:
"ti,lm3632"
"ti,lm3633"
"ti,lm3695"
- "ti,lm3697"
+ "ti,lm36274"
- reg: I2C slave address.
0x11 for LM3632
0x29 for LM3631
- 0x36 for LM3633, LM3697
+ 0x36 for LM3633
0x63 for LM3695
+ 0x11 for LM36274
-Optional property:
+Optional properties:
- enable-gpios: A GPIO specifier for hardware enable pin.
+ - ramp-up-us: Current ramping from one brightness level to
+ the a higher brightness level.
+ Range from 2048 us - 117.44 s
+ - ramp-down-us: Current ramping from one brightness level to
+ the a lower brightness level.
+ Range from 2048 us - 117.44 s
+ - ti,brightness-resolution - This determines whether to use 8 bit brightness
+ mode or 11 bit brightness mode. If this value is
+ not set the device is defaulted to the preferred
+ 8bit brightness mode per 7.3.4.1 of the data
+ sheet. This setting can either be in the parent
+ node or as part of the LED child nodes. This
+ is determined by the part itself if the strings
+ have a common brightness register or individual
+ brightness registers.
+ The values are 255 (8bit) or 2047 (11bit).
Required node:
- backlight: All LMU devices have backlight child nodes.
@@ -35,14 +52,15 @@ Optional nodes:
Required properties:
- compatible: Should be one of:
"ti,lm3633-fault-monitor"
- "ti,lm3697-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";
@@ -90,7 +108,7 @@ lm3631@29 {
lcd_bl {
led-sources = <0 1>;
- ramp-up-msec = <300>;
+ ramp-up-us = <300000>;
};
};
};
@@ -152,15 +170,15 @@ lm3633@36 {
main {
label = "main_lcd";
led-sources = <1 2>;
- ramp-up-msec = <500>;
- ramp-down-msec = <500>;
+ ramp-up-us = <500000>;
+ ramp-down-us = <500000>;
};
front {
label = "front_lcd";
led-sources = <0>;
- ramp-up-msec = <1000>;
- ramp-down-msec = <0>;
+ ramp-up-us = <1000000>;
+ ramp-down-us = <0>;
};
};
@@ -201,23 +219,51 @@ lm3695@63 {
};
};
-lm3697@36 {
- compatible = "ti,lm3697";
- reg = <0x36>;
+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";
- backlight {
- compatible = "ti,lm3697-backlight";
+ enable-gpios = <&pioC 0 GPIO_ACTIVE_HIGH>,
+ <&pioC 1 GPIO_ACTIVE_HIGH>;
- lcd {
- led-sources = <0 1 2>;
- ramp-up-msec = <200>;
- ramp-down-msec = <200>;
+ 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>;
};
};
- fault-monitor {
- compatible = "ti,lm3697-fault-monitor";
+ 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";
+ };
};
};
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 35fcddb7ac2a..fb8072303ee8 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -793,6 +793,31 @@ config LEDS_SPI_BYTE
for controlling the brightness. Currently the following controller is
supported: Ubiquiti airCube ISP microcontroller based LED controller.
+config LEDS_TI_LMU_COMMON
+ tristate "LED driver for TI LMU"
+ depends on LEDS_CLASS
+ depends on REGMAP
+ 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.
+
+config LEDS_LM3697
+ tristate "LED driver for LM3697"
+ depends on LEDS_TI_LMU_COMMON
+ depends on I2C && OF
+ help
+ 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
+ depends on MFD_TI_LMU
+ help
+ Say Y to enable the LM36274 LED driver for TI LMU devices.
+ This supports the LED device LM36274.
+
comment "LED Triggers"
source "drivers/leds/trigger/Kconfig"
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 2e8bff590700..41fb073a39c1 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -82,6 +82,9 @@ obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o
obj-$(CONFIG_LEDS_LM3692X) += leds-lm3692x.o
obj-$(CONFIG_LEDS_SC27XX_BLTC) += leds-sc27xx-bltc.o
obj-$(CONFIG_LEDS_LM3601X) += leds-lm3601x.o
+obj-$(CONFIG_LEDS_TI_LMU_COMMON) += leds-ti-lmu-common.o
+obj-$(CONFIG_LEDS_LM3697) += leds-lm3697.o
+obj-$(CONFIG_LEDS_LM36274) += leds-lm36274.o
# LED SPI Drivers
obj-$(CONFIG_LEDS_CR0014114) += leds-cr0014114.o
diff --git a/drivers/leds/leds-lm36274.c b/drivers/leds/leds-lm36274.c
new file mode 100644
index 000000000000..ed9dc857ec8f
--- /dev/null
+++ b/drivers/leds/leds-lm36274.c
@@ -0,0 +1,172 @@
+// 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/leds-ti-lmu-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 -EINVAL;
+
+ 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 ret;
+ }
+
+ 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 0;
+}
+
+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)
+ return -ENOMEM;
+
+ 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");
diff --git a/drivers/leds/leds-lm3697.c b/drivers/leds/leds-lm3697.c
new file mode 100644
index 000000000000..54e0e35df824
--- /dev/null
+++ b/drivers/leds/leds-lm3697.c
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0
+// TI LM3697 LED chip family driver
+// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/regulator/consumer.h>
+#include <linux/leds-ti-lmu-common.h>
+
+#define LM3697_REV 0x0
+#define LM3697_RESET 0x1
+#define LM3697_OUTPUT_CONFIG 0x10
+#define LM3697_CTRL_A_RAMP 0x11
+#define LM3697_CTRL_B_RAMP 0x12
+#define LM3697_CTRL_A_B_RT_RAMP 0x13
+#define LM3697_CTRL_A_B_RAMP_CFG 0x14
+#define LM3697_CTRL_A_B_BRT_CFG 0x16
+#define LM3697_CTRL_A_FS_CURR_CFG 0x17
+#define LM3697_CTRL_B_FS_CURR_CFG 0x18
+#define LM3697_PWM_CFG 0x1c
+#define LM3697_CTRL_A_BRT_LSB 0x20
+#define LM3697_CTRL_A_BRT_MSB 0x21
+#define LM3697_CTRL_B_BRT_LSB 0x22
+#define LM3697_CTRL_B_BRT_MSB 0x23
+#define LM3697_CTRL_ENABLE 0x24
+
+#define LM3697_SW_RESET BIT(0)
+
+#define LM3697_CTRL_A_EN BIT(0)
+#define LM3697_CTRL_B_EN BIT(1)
+#define LM3697_CTRL_A_B_EN (LM3697_CTRL_A_EN | LM3697_CTRL_B_EN)
+
+#define LM3697_MAX_LED_STRINGS 3
+
+#define LM3697_CONTROL_A 0
+#define LM3697_CONTROL_B 1
+#define LM3697_MAX_CONTROL_BANKS 2
+
+/**
+ * struct lm3697_led -
+ * @hvled_strings: Array of LED strings associated with a control bank
+ * @label: LED label
+ * @led_dev: LED class device
+ * @priv: Pointer to the device struct
+ * @lmu_data: Register and setting values for common code
+ * @control_bank: Control bank the LED is associated to. 0 is control bank A
+ * 1 is control bank B
+ */
+struct lm3697_led {
+ u32 hvled_strings[LM3697_MAX_LED_STRINGS];
+ char label[LED_MAX_NAME_SIZE];
+ struct led_classdev led_dev;
+ struct lm3697 *priv;
+ struct ti_lmu_bank lmu_data;
+ int control_bank;
+ int enabled;
+ int num_leds;
+};
+
+/**
+ * struct lm3697 -
+ * @enable_gpio: Hardware enable gpio
+ * @regulator: LED supply regulator pointer
+ * @client: Pointer to the I2C client
+ * @regmap: Devices register map
+ * @dev: Pointer to the devices device struct
+ * @lock: Lock for reading/writing the device
+ * @leds: Array of LED strings
+ */
+struct lm3697 {
+ struct gpio_desc *enable_gpio;
+ struct regulator *regulator;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct device *dev;
+ struct mutex lock;
+
+ int bank_cfg;
+
+ struct lm3697_led leds[];
+};
+
+static const struct reg_default lm3697_reg_defs[] = {
+ {LM3697_OUTPUT_CONFIG, 0x6},
+ {LM3697_CTRL_A_RAMP, 0x0},
+ {LM3697_CTRL_B_RAMP, 0x0},
+ {LM3697_CTRL_A_B_RT_RAMP, 0x0},
+ {LM3697_CTRL_A_B_RAMP_CFG, 0x0},
+ {LM3697_CTRL_A_B_BRT_CFG, 0x0},
+ {LM3697_CTRL_A_FS_CURR_CFG, 0x13},
+ {LM3697_CTRL_B_FS_CURR_CFG, 0x13},
+ {LM3697_PWM_CFG, 0xc},
+ {LM3697_CTRL_A_BRT_LSB, 0x0},
+ {LM3697_CTRL_A_BRT_MSB, 0x0},
+ {LM3697_CTRL_B_BRT_LSB, 0x0},
+ {LM3697_CTRL_B_BRT_MSB, 0x0},
+ {LM3697_CTRL_ENABLE, 0x0},
+};
+
+static const struct regmap_config lm3697_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = LM3697_CTRL_ENABLE,
+ .reg_defaults = lm3697_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(lm3697_reg_defs),
+ .cache_type = REGCACHE_FLAT,
+};
+
+static int lm3697_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brt_val)
+{
+ struct lm3697_led *led = container_of(led_cdev, struct lm3697_led,
+ led_dev);
+ int ctrl_en_val = (1 << led->control_bank);
+ int ret;
+
+ mutex_lock(&led->priv->lock);
+
+ if (brt_val == LED_OFF) {
+ ret = regmap_update_bits(led->priv->regmap, LM3697_CTRL_ENABLE,
+ ctrl_en_val, ~ctrl_en_val);
+ if (ret) {
+ dev_err(&led->priv->client->dev, "Cannot write ctrl register\n");
+ goto brightness_out;
+ }
+
+ led->enabled = LED_OFF;
+ } else {
+ ret = ti_lmu_common_set_brightness(&led->lmu_data, brt_val);
+ if (ret) {
+ dev_err(&led->priv->client->dev,
+ "Cannot write brightness\n");
+ goto brightness_out;
+ }
+
+ if (!led->enabled) {
+ ret = regmap_update_bits(led->priv->regmap,
+ LM3697_CTRL_ENABLE,
+ ctrl_en_val, ctrl_en_val);
+ if (ret) {
+ dev_err(&led->priv->client->dev,
+ "Cannot enable the device\n");
+ goto brightness_out;
+ }
+
+ led->enabled = brt_val;
+ }
+ }
+
+brightness_out:
+ mutex_unlock(&led->priv->lock);
+ return ret;
+}
+
+static int lm3697_init(struct lm3697 *priv)
+{
+ struct lm3697_led *led;
+ int i, ret;
+
+ if (priv->enable_gpio) {
+ gpiod_direction_output(priv->enable_gpio, 1);
+ } else {
+ ret = regmap_write(priv->regmap, LM3697_RESET, LM3697_SW_RESET);
+ if (ret) {
+ dev_err(&priv->client->dev, "Cannot reset the device\n");
+ goto out;
+ }
+ }
+
+ ret = regmap_write(priv->regmap, LM3697_CTRL_ENABLE, 0x0);
+ if (ret) {
+ dev_err(&priv->client->dev, "Cannot write ctrl enable\n");
+ goto out;
+ }
+
+ ret = regmap_write(priv->regmap, LM3697_OUTPUT_CONFIG, priv->bank_cfg);
+ if (ret)
+ dev_err(&priv->client->dev, "Cannot write OUTPUT config\n");
+
+ for (i = 0; i < LM3697_MAX_CONTROL_BANKS; i++) {
+ led = &priv->leds[i];
+ ret = ti_lmu_common_set_ramp(&led->lmu_data);
+ if (ret)
+ dev_err(&priv->client->dev, "Setting the ramp rate failed\n");
+ }
+out:
+ return ret;
+}
+
+static int lm3697_probe_dt(struct lm3697 *priv)
+{
+ struct fwnode_handle *child = NULL;
+ struct lm3697_led *led;
+ const char *name;
+ int control_bank;
+ size_t i = 0;
+ int ret = -EINVAL;
+ int j;
+
+ priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev,
+ "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(priv->enable_gpio)) {
+ ret = PTR_ERR(priv->enable_gpio);
+ dev_err(&priv->client->dev, "Failed to get enable gpio: %d\n",
+ ret);
+ return ret;
+ }
+
+ priv->regulator = devm_regulator_get(&priv->client->dev, "vled");
+ if (IS_ERR(priv->regulator))
+ priv->regulator = NULL;
+
+ device_for_each_child_node(priv->dev, child) {
+ ret = fwnode_property_read_u32(child, "reg", &control_bank);
+ if (ret) {
+ dev_err(&priv->client->dev, "reg property missing\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ if (control_bank > LM3697_CONTROL_B) {
+ dev_err(&priv->client->dev, "reg property is invalid\n");
+ ret = -EINVAL;
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ led = &priv->leds[i];
+
+ ret = ti_lmu_common_get_brt_res(&priv->client->dev,
+ child, &led->lmu_data);
+ if (ret)
+ dev_warn(&priv->client->dev, "brightness resolution property missing\n");
+
+ led->control_bank = control_bank;
+ led->lmu_data.regmap = priv->regmap;
+ led->lmu_data.runtime_ramp_reg = LM3697_CTRL_A_RAMP +
+ control_bank;
+ led->lmu_data.msb_brightness_reg = LM3697_CTRL_A_BRT_MSB +
+ led->control_bank * 2;
+ led->lmu_data.lsb_brightness_reg = LM3697_CTRL_A_BRT_LSB +
+ led->control_bank * 2;
+
+ led->num_leds = fwnode_property_read_u32_array(child,
+ "led-sources",
+ NULL, 0);
+
+ if (led->num_leds > LM3697_MAX_LED_STRINGS) {
+ dev_err(&priv->client->dev, "To many LED strings defined\n");
+ continue;
+ }
+
+ ret = fwnode_property_read_u32_array(child, "led-sources",
+ led->hvled_strings,
+ led->num_leds);
+ if (ret) {
+ dev_err(&priv->client->dev, "led-sources property missing\n");
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ for (j = 0; j < led->num_leds; j++)
+ priv->bank_cfg |=
+ (led->control_bank << led->hvled_strings[j]);
+
+ ret = ti_lmu_common_get_ramp_params(&priv->client->dev,
+ child, &led->lmu_data);
+ if (ret)
+ dev_warn(&priv->client->dev, "runtime-ramp properties missing\n");
+
+ fwnode_property_read_string(child, "linux,default-trigger",
+ &led->led_dev.default_trigger);
+
+ ret = fwnode_property_read_string(child, "label", &name);
+ if (ret)
+ snprintf(led->label, sizeof(led->label),
+ "%s::", priv->client->name);
+ else
+ snprintf(led->label, sizeof(led->label),
+ "%s:%s", priv->client->name, name);
+
+ led->priv = priv;
+ led->led_dev.name = led->label;
+ led->led_dev.max_brightness = led->lmu_data.max_brightness;
+ led->led_dev.brightness_set_blocking = lm3697_brightness_set;
+
+ ret = devm_led_classdev_register(priv->dev, &led->led_dev);
+ if (ret) {
+ dev_err(&priv->client->dev, "led register err: %d\n",
+ ret);
+ fwnode_handle_put(child);
+ goto child_out;
+ }
+
+ i++;
+ }
+
+child_out:
+ return ret;
+}
+
+static int lm3697_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm3697 *led;
+ int count;
+ int ret;
+
+ count = device_get_child_node_count(&client->dev);
+ if (!count) {
+ dev_err(&client->dev, "LEDs are not defined in device tree!");
+ return -ENODEV;
+ }
+
+ led = devm_kzalloc(&client->dev, struct_size(led, leds, count),
+ GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
+
+ mutex_init(&led->lock);
+ i2c_set_clientdata(client, led);
+
+ led->client = client;
+ led->dev = &client->dev;
+ led->regmap = devm_regmap_init_i2c(client, &lm3697_regmap_config);
+ if (IS_ERR(led->regmap)) {
+ ret = PTR_ERR(led->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = lm3697_probe_dt(led);
+ if (ret)
+ return ret;
+
+ return lm3697_init(led);
+}
+
+static int lm3697_remove(struct i2c_client *client)
+{
+ struct lm3697 *led = i2c_get_clientdata(client);
+ int ret;
+
+ ret = regmap_update_bits(led->regmap, LM3697_CTRL_ENABLE,
+ LM3697_CTRL_A_B_EN, 0);
+ if (ret) {
+ dev_err(&led->client->dev, "Failed to disable the device\n");
+ return ret;
+ }
+
+ if (led->enable_gpio)
+ gpiod_direction_output(led->enable_gpio, 0);
+
+ if (led->regulator) {
+ ret = regulator_disable(led->regulator);
+ if (ret)
+ dev_err(&led->client->dev,
+ "Failed to disable regulator\n");
+ }
+
+ mutex_destroy(&led->lock);
+
+ return 0;
+}
+
+static const struct i2c_device_id lm3697_id[] = {
+ { "lm3697", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm3697_id);
+
+static const struct of_device_id of_lm3697_leds_match[] = {
+ { .compatible = "ti,lm3697", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_lm3697_leds_match);
+
+static struct i2c_driver lm3697_driver = {
+ .driver = {
+ .name = "lm3697",
+ .of_match_table = of_lm3697_leds_match,
+ },
+ .probe = lm3697_probe,
+ .remove = lm3697_remove,
+ .id_table = lm3697_id,
+};
+module_i2c_driver(lm3697_driver);
+
+MODULE_DESCRIPTION("Texas Instruments LM3697 LED driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-ti-lmu-common.c b/drivers/leds/leds-ti-lmu-common.c
new file mode 100644
index 000000000000..adc7293004f1
--- /dev/null
+++ b/drivers/leds/leds-ti-lmu-common.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2015 Texas Instruments
+// Copyright 2018 Sebastian Reichel
+// Copyright 2018 Pavel Machek <pavel@ucw.cz>
+// TI LMU LED common framework, based on previous work from
+// Milo Kim <milo.kim@ti.com>
+
+#include <linux/bitops.h>
+#include <linux/err.h>
+#include <linux/of_device.h>
+
+#include <linux/leds-ti-lmu-common.h>
+
+const static int ramp_table[16] = {2048, 262000, 524000, 1049000, 2090000,
+ 4194000, 8389000, 16780000, 33550000, 41940000,
+ 50330000, 58720000, 67110000, 83880000,
+ 100660000, 117440000};
+
+static int ti_lmu_common_update_brightness(struct ti_lmu_bank *lmu_bank,
+ int brightness)
+{
+ struct regmap *regmap = lmu_bank->regmap;
+ u8 reg, val;
+ int ret;
+
+ /*
+ * Brightness register update
+ *
+ * 11 bit dimming: update LSB bits and write MSB byte.
+ * MSB brightness should be shifted.
+ * 8 bit dimming: write MSB byte.
+ */
+ if (lmu_bank->max_brightness == MAX_BRIGHTNESS_11BIT) {
+ reg = lmu_bank->lsb_brightness_reg;
+ ret = regmap_update_bits(regmap, reg,
+ LMU_11BIT_LSB_MASK,
+ brightness);
+ if (ret)
+ return ret;
+
+ val = brightness >> LMU_11BIT_MSB_SHIFT;
+ } else {
+ val = brightness;
+ }
+
+ reg = lmu_bank->msb_brightness_reg;
+
+ return regmap_write(regmap, reg, val);
+}
+
+int ti_lmu_common_set_brightness(struct ti_lmu_bank *lmu_bank, int brightness)
+{
+ return ti_lmu_common_update_brightness(lmu_bank, brightness);
+}
+EXPORT_SYMBOL(ti_lmu_common_set_brightness);
+
+static int ti_lmu_common_convert_ramp_to_index(unsigned int usec)
+{
+ int size = ARRAY_SIZE(ramp_table);
+ int i;
+
+ if (usec <= ramp_table[0])
+ return 0;
+
+ if (usec > ramp_table[size - 1])
+ return size - 1;
+
+ for (i = 1; i < size; i++) {
+ if (usec == ramp_table[i])
+ return i;
+
+ /* Find an approximate index by looking up the table */
+ if (usec > ramp_table[i - 1] && usec < ramp_table[i]) {
+ if (usec - ramp_table[i - 1] < ramp_table[i] - usec)
+ return i - 1;
+ else
+ return i;
+ }
+ }
+
+ return -EINVAL;
+}
+
+int ti_lmu_common_set_ramp(struct ti_lmu_bank *lmu_bank)
+{
+ struct regmap *regmap = lmu_bank->regmap;
+ u8 ramp, ramp_up, ramp_down;
+
+ if (lmu_bank->ramp_up_usec == 0 && lmu_bank->ramp_down_usec == 0) {
+ ramp_up = 0;
+ ramp_down = 0;
+ } else {
+ ramp_up = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_up_usec);
+ ramp_down = ti_lmu_common_convert_ramp_to_index(lmu_bank->ramp_down_usec);
+ }
+
+ if (ramp_up < 0 || ramp_down < 0)
+ return -EINVAL;
+
+ ramp = (ramp_up << 4) | ramp_down;
+
+ return regmap_write(regmap, lmu_bank->runtime_ramp_reg, ramp);
+
+}