Re: [PATCH v8 2/2] leds: lm3601x: Introduce the lm3601x LED driver

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On 05/22/2018 03:12 PM, Andy Shevchenko wrote:
> On Tue, May 22, 2018 at 5:24 PM, Dan Murphy <dmurphy@xxxxxx> wrote:
>> Introduce the family of LED devices that can
>> drive a torch, strobe or IR LED.
>>
>> The LED driver can be configured with a strobe
>> timer to execute a strobe flash.  The IR LED
>> brightness is controlled via the torch brightness
>> register.
>>
>> The data sheet for each the LM36010 and LM36011
>> LED drivers can be found here:
>> http://www.ti.com/product/LM36010
>> http://www.ti.com/product/LM36011
>>
>> Signed-off-by: Dan Murphy <dmurphy@xxxxxx>
>> ---
>>
>> v8 - Removed OF Kconfig dependency, change strobe to flash, updated label generation,
>> fixed brightness calculation, added mutex_destroy and flash_unregister - https://patchwork.kernel.org/patch/10416163/
>>
>> v7 - Numerous fixes to many to list.  Highlights are moved from OF APIs to device_property
>> APIs, updated LED registration, timeout to reg algorithim, and fixed label generation -
>> https://patchwork.kernel.org/patch/10401437/
>> v6 - This driver has been heavily modified from v5.  There is no longer reading
>> of individual child nodes.  There are too many changes to list here see -
>> https://patchwork.kernel.org/patch/10392123/
>> v5 - Fixed magic numbers, change reg cache type, added of_put_node to release
>> the dt node ref, and I did not change the remove function to leave the LED in its
>> state on driver removal - https://patchwork.kernel.org/patch/10391741/
>> v4 - Fixed Cocci issue using ARRAY_SIZE - https://patchwork.kernel.org/patch/10389259/
>> v3 - removed wildcard dt compatible, fixed copyright, fixed struct doc, removed
>> RO registers from default, added regmap volatile for FLAGS_REG, updated regmap cache type,
>> fixed unlock and extra semi colon in strobe_set, removed unnecessary out label
>> in led register and fixed checking of the ret in brightness_set - https://patchwork.kernel.org/patch/10386243/
>> v2 - Fixed kbuild issue and removed unused cdev_strobe - https://patchwork.kernel.org/patch/10384585/
>>
>>
>>  drivers/leds/Kconfig        |   9 +
>>  drivers/leds/Makefile       |   1 +
>>  drivers/leds/leds-lm3601x.c | 492 ++++++++++++++++++++++++++++++++++++
>>  3 files changed, 502 insertions(+)
>>  create mode 100644 drivers/leds/leds-lm3601x.c
>>
>> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
>> index 2c896c0e69e1..d95d436e6089 100644
>> --- a/drivers/leds/Kconfig
>> +++ b/drivers/leds/Kconfig
>> @@ -145,6 +145,15 @@ config LEDS_LM3692X
>>           This option enables support for the TI LM3692x family
>>           of white LED string drivers used for backlighting.
>>
>> +config LEDS_LM3601X
>> +       tristate "LED support for LM3601x Chips"
>> +       depends on LEDS_CLASS && I2C
>> +       depends on LEDS_CLASS_FLASH
>> +       select REGMAP_I2C
>> +       help
>> +         This option enables support for the TI LM3601x family
>> +         of flash, torch and indicator classes.
>> +
>>  config LEDS_LOCOMO
>>         tristate "LED Support for Locomo device"
>>         depends on LEDS_CLASS
>> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
>> index 91eca81cae82..b79807fe1b67 100644
>> --- a/drivers/leds/Makefile
>> +++ b/drivers/leds/Makefile
>> @@ -76,6 +76,7 @@ obj-$(CONFIG_LEDS_MLXREG)             += leds-mlxreg.o
>>  obj-$(CONFIG_LEDS_NIC78BX)             += leds-nic78bx.o
>>  obj-$(CONFIG_LEDS_MT6323)              += leds-mt6323.o
>>  obj-$(CONFIG_LEDS_LM3692X)             += leds-lm3692x.o
>> +obj-$(CONFIG_LEDS_LM3601X)             += leds-lm3601x.o
>>
>>  # LED SPI Drivers
>>  obj-$(CONFIG_LEDS_DAC124S085)          += leds-dac124s085.o
>> diff --git a/drivers/leds/leds-lm3601x.c b/drivers/leds/leds-lm3601x.c
>> new file mode 100644
>> index 000000000000..b1f0ede704c1
>> --- /dev/null
>> +++ b/drivers/leds/leds-lm3601x.c
>> @@ -0,0 +1,492 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +// Flash and torch driver for Texas Instruments LM3601X LED
>> +// Flash driver chip family
>> +// Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
>> +
>> +#include <linux/delay.h>
>> +#include <linux/i2c.h>
>> +#include <linux/leds.h>
>> +#include <linux/led-class-flash.h>
>> +#include <linux/module.h>
>> +#include <linux/regmap.h>
>> +#include <linux/slab.h>
>> +#include <uapi/linux/uleds.h>
>> +
>> +#define LM3601X_LED_IR         0x0
>> +#define LM3601X_LED_TORCH      0x1
>> +
>> +/* Registers */
>> +#define LM3601X_ENABLE_REG     0x01
>> +#define LM3601X_CFG_REG                0x02
>> +#define LM3601X_LED_FLASH_REG  0x03
>> +#define LM3601X_LED_TORCH_REG  0x04
>> +#define LM3601X_FLAGS_REG      0x05
>> +#define LM3601X_DEV_ID_REG     0x06
>> +
>> +#define LM3601X_SW_RESET       BIT(7)
>> +
>> +/* Enable Mode bits */
>> +#define LM3601X_MODE_STANDBY   0x00
>> +#define LM3601X_MODE_IR_DRV    BIT(0)
>> +#define LM3601X_MODE_TORCH     BIT(1)
>> +#define LM3601X_MODE_STROBE    (BIT(0) | BIT(1))
>> +#define LM3601X_STRB_EN                BIT(2)
>> +#define LM3601X_STRB_EDGE_TRIG BIT(3)
>> +#define LM3601X_IVFM_EN                BIT(4)
>> +
>> +#define LM36010_BOOST_LIMIT_28 BIT(5)
>> +#define LM36010_BOOST_FREQ_4MHZ        BIT(6)
>> +#define LM36010_BOOST_MODE_PASS        BIT(7)
>> +
>> +/* Flag Mask */
>> +#define LM3601X_FLASH_TIME_OUT BIT(0)
>> +#define LM3601X_UVLO_FAULT     BIT(1)
>> +#define LM3601X_THERM_SHUTDOWN BIT(2)
>> +#define LM3601X_THERM_CURR     BIT(3)
>> +#define LM36010_CURR_LIMIT     BIT(4)
>> +#define LM3601X_SHORT_FAULT    BIT(5)
>> +#define LM3601X_IVFM_TRIP      BIT(6)
>> +#define LM36010_OVP_FAULT      BIT(7)
>> +
>> +#define LM3601X_MAX_TORCH_I_UA 376000
>> +#define LM3601X_MIN_TORCH_I_UA 2400
>> +#define LM3601X_TORCH_REG_DIV  2965
>> +
>> +#define LM3601X_MAX_STROBE_I_UA        1500000
>> +#define LM3601X_MIN_STROBE_I_UA        11000
>> +#define LM3601X_STROBE_REG_DIV 11800
>> +
>> +#define LM3601X_TIMEOUT_MASK   0x1e
>> +#define LM3601X_ENABLE_MASK    (LM3601X_MODE_IR_DRV | LM3601X_MODE_TORCH)
>> +
>> +#define LM3601X_LOWER_STEP_US  40000
>> +#define LM3601X_UPPER_STEP_US  200000
>> +#define LM3601X_MIN_TIMEOUT_US 40000
>> +#define LM3601X_MAX_TIMEOUT_US 1600000
>> +#define LM3601X_TIMEOUT_XOVER_US 400000
>> +
>> +enum lm3601x_type {
>> +       CHIP_LM36010 = 0,
>> +       CHIP_LM36011,
>> +};
>> +
>> +/**
>> + * struct lm3601x_led -
>> + * @fled_cdev: flash LED class device pointer
>> + * @client: Pointer to the I2C client
>> + * @regmap: Devices register map
>> + * @lock: Lock for reading/writing the device
>> + * @led_name: LED label for the Torch or IR LED
>> + * @flash_timeout: the timeout for the flash
>> + * @last_flag: last known flags register value
>> + * @torch_current_max: maximum current for the torch
>> + * @flash_current_max: maximum current for the flash
>> + * @max_flash_timeout: maximum timeout for the flash
>> + * @led_mode: The mode to enable either IR or Torch
>> + */
>> +struct lm3601x_led {
>> +       struct led_classdev_flash fled_cdev;
>> +       struct i2c_client *client;
>> +       struct regmap *regmap;
>> +       struct mutex lock;
>> +
>> +       char led_name[LED_MAX_NAME_SIZE];
>> +
>> +       unsigned int flash_timeout;
>> +       unsigned int last_flag;
>> +
>> +       u32 torch_current_max;
>> +       u32 flash_current_max;
>> +       u32 max_flash_timeout;
>> +
>> +       u32 led_mode;
>> +};
>> +
>> +static const struct reg_default lm3601x_regmap_defs[] = {
>> +       { LM3601X_ENABLE_REG, 0x20 },
>> +       { LM3601X_CFG_REG, 0x15 },
>> +       { LM3601X_LED_FLASH_REG, 0x00 },
>> +       { LM3601X_LED_TORCH_REG, 0x00 },
>> +};
>> +
>> +static bool lm3601x_volatile_reg(struct device *dev, unsigned int reg)
>> +{
>> +       switch (reg) {
>> +       case LM3601X_FLAGS_REG:
>> +               return true;
>> +       default:
>> +               return false;
>> +       }
>> +}
>> +
>> +static const struct regmap_config lm3601x_regmap = {
>> +       .reg_bits = 8,
>> +       .val_bits = 8,
>> +
>> +       .max_register = LM3601X_DEV_ID_REG,
>> +       .reg_defaults = lm3601x_regmap_defs,
>> +       .num_reg_defaults = ARRAY_SIZE(lm3601x_regmap_defs),
>> +       .cache_type = REGCACHE_RBTREE,
>> +       .volatile_reg = lm3601x_volatile_reg,
>> +};
>> +
> 
>> +static struct lm3601x_led *fled_cdev_to_led(
>> +                               struct led_classdev_flash *fled_cdev)
> 
> Didn't notice before. This will look much better in one line.

Gives LTL warning.

> 
>> +{
>> +       return container_of(fled_cdev, struct lm3601x_led, fled_cdev);
>> +}
>> +
>> +static int lm3601x_read_faults(struct lm3601x_led *led)
>> +{
>> +       int flags_val;
>> +       int ret;
>> +
>> +       ret = regmap_read(led->regmap, LM3601X_FLAGS_REG, &flags_val);
>> +       if (ret < 0)
>> +               return -EIO;
>> +
>> +       led->last_flag = 0;
>> +
>> +       if (flags_val & LM36010_OVP_FAULT)
>> +               led->last_flag |= LED_FAULT_OVER_VOLTAGE;
>> +
>> +       if (flags_val & (LM3601X_THERM_SHUTDOWN | LM3601X_THERM_CURR))
>> +               led->last_flag |= LED_FAULT_OVER_TEMPERATURE;
>> +
>> +       if (flags_val & LM3601X_SHORT_FAULT)
>> +               led->last_flag |= LED_FAULT_SHORT_CIRCUIT;
>> +
>> +       if (flags_val & LM36010_CURR_LIMIT)
>> +               led->last_flag |= LED_FAULT_OVER_CURRENT;
>> +
>> +       if (flags_val & LM3601X_UVLO_FAULT)
>> +               led->last_flag |= LED_FAULT_UNDER_VOLTAGE;
>> +
>> +       if (flags_val & LM3601X_IVFM_TRIP)
>> +               led->last_flag |= LED_FAULT_INPUT_VOLTAGE;
>> +
>> +       if (flags_val & LM3601X_THERM_SHUTDOWN)
>> +               led->last_flag |= LED_FAULT_LED_OVER_TEMPERATURE;
>> +
>> +       return led->last_flag;
>> +}
>> +
>> +static int lm3601x_brightness_set(struct led_classdev *cdev,
>> +                                       enum led_brightness brightness)
>> +{
>> +       struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(cdev);
>> +       struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
>> +       int ret, led_mode_val;
>> +
>> +       mutex_lock(&led->lock);
>> +
>> +       ret = lm3601x_read_faults(led);
>> +       if (ret < 0)
>> +               goto out;
>> +
>> +       if (led->led_mode == LM3601X_LED_TORCH)
>> +               led_mode_val = LM3601X_MODE_TORCH;
>> +       else
>> +               led_mode_val = LM3601X_MODE_IR_DRV;
>> +
>> +       if (brightness == LED_OFF) {
>> +               ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
>> +                                       led_mode_val, LED_OFF);
>> +               goto out;
>> +       }
>> +
>> +       ret = regmap_write(led->regmap, LM3601X_LED_TORCH_REG, brightness);
>> +       if (ret < 0)
>> +               goto out;
>> +
>> +       ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
>> +                               LM3601X_MODE_TORCH | LM3601X_MODE_IR_DRV,
>> +                               led_mode_val);
>> +out:
>> +       mutex_unlock(&led->lock);
>> +       return ret;
>> +}
>> +
>> +static int lm3601x_flash_set(struct led_classdev_flash *fled_cdev,
>> +                               bool state)
>> +{
>> +       struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
> 
>> +       int timeout_reg_val = 0;
> 
> Redundant assignment.

OK

> 
>> +       int current_timeout;
>> +       int ret;
>> +
>> +       mutex_lock(&led->lock);
>> +
>> +       ret = regmap_read(led->regmap, LM3601X_CFG_REG, &current_timeout);
>> +       if (ret < 0)
>> +               goto out;
>> +
>> +       if (led->flash_timeout >= LM3601X_TIMEOUT_XOVER_US)
>> +               timeout_reg_val = led->flash_timeout / LM3601X_UPPER_STEP_US + 0x07;
>> +       else
>> +               timeout_reg_val = led->flash_timeout / LM3601X_LOWER_STEP_US - 0x01;
>> +
>> +       if (led->flash_timeout != current_timeout)
>> +               ret = regmap_update_bits(led->regmap, LM3601X_CFG_REG,
>> +                                       LM3601X_TIMEOUT_MASK, timeout_reg_val);
>> +
>> +       if (state)
>> +               ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
>> +                                       LM3601X_MODE_TORCH | LM3601X_MODE_IR_DRV,
>> +                                       LM3601X_MODE_STROBE);
>> +       else
>> +               ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
>> +                                       LM3601X_MODE_STROBE, LED_OFF);
>> +
>> +       ret = lm3601x_read_faults(led);
>> +out:
>> +       mutex_unlock(&led->lock);
>> +       return ret;
>> +}
>> +
>> +static int lm3601x_flash_brightness_set(struct led_classdev_flash *fled_cdev,
>> +                                       u32 brightness)
>> +{
>> +       struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
> 
>> +       int ret;
>> +       u8 brightness_val;
> 
> Better to read reversed xmas tree order.

ok

> 
>> +
>> +       mutex_lock(&led->lock);
>> +       ret = lm3601x_read_faults(led);
>> +       if (ret < 0)
>> +               goto out;
>> +
>> +       if (brightness == LED_OFF) {
>> +               ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
>> +                                       LM3601X_MODE_STROBE, LED_OFF);
>> +               goto out;
>> +       }
>> +
>> +       brightness_val = brightness / LM3601X_STROBE_REG_DIV;
>> +
>> +       ret = regmap_write(led->regmap, LM3601X_LED_FLASH_REG, brightness_val);
>> +out:
>> +       mutex_unlock(&led->lock);
>> +       return ret;
>> +}
>> +
>> +static int lm3601x_flash_timeout_set(struct led_classdev_flash *fled_cdev,
>> +                               u32 timeout)
>> +{
>> +       struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
> 
>> +       int ret = 0;
> 
> Redundant variable.

Removed

> 
>> +
>> +       mutex_lock(&led->lock);
>> +
>> +       led->flash_timeout = timeout;
>> +
>> +       mutex_unlock(&led->lock);
>> +
>> +       return ret;
>> +}
>> +
>> +static int lm3601x_flash_get(struct led_classdev_flash *fled_cdev,
>> +                               bool *state)
>> +{
>> +       struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
>> +       int ret;
>> +       int flash_state;
>> +
>> +       mutex_lock(&led->lock);
>> +
>> +       ret = regmap_read(led->regmap, LM3601X_ENABLE_REG, &flash_state);
>> +       if (ret < 0)
>> +               goto out;
>> +
>> +       *state = flash_state & LM3601X_MODE_STROBE;
>> +
>> +out:
>> +       mutex_unlock(&led->lock);
>> +       return ret;
>> +}
>> +
>> +static int lm3601x_flash_fault_get(struct led_classdev_flash *fled_cdev,
>> +                               u32 *fault)
>> +{
>> +       struct lm3601x_led *led = fled_cdev_to_led(fled_cdev);
>> +
>> +       lm3601x_read_faults(led);
>> +
>> +       *fault = led->last_flag;
>> +
>> +       return 0;
>> +}
>> +
>> +static const struct led_flash_ops flash_ops = {
>> +       .flash_brightness_set   = lm3601x_flash_brightness_set,
>> +       .strobe_set             = lm3601x_flash_set,
>> +       .strobe_get             = lm3601x_flash_get,
>> +       .timeout_set            = lm3601x_flash_timeout_set,
>> +       .fault_get              = lm3601x_flash_fault_get,
>> +};
>> +
>> +static int lm3601x_register_leds(struct lm3601x_led *led)
>> +{
>> +       struct led_classdev *led_cdev;
>> +       struct led_flash_setting *setting;
>> +
>> +       led->fled_cdev.ops = &flash_ops;
>> +
>> +       setting = &led->fled_cdev.timeout;
>> +       setting->min = LM3601X_MIN_TIMEOUT_US;
>> +       setting->max = led->max_flash_timeout;
>> +       setting->step = LM3601X_LOWER_STEP_US;
>> +       setting->val = led->max_flash_timeout;
>> +
>> +       setting = &led->fled_cdev.brightness;
>> +       setting->min = LM3601X_MIN_STROBE_I_UA;
>> +       setting->max = led->flash_current_max;
>> +       setting->step = LM3601X_TORCH_REG_DIV;
>> +       setting->val = led->flash_current_max;
>> +
>> +       led_cdev = &led->fled_cdev.led_cdev;
>> +       led_cdev->name = led->led_name;
>> +       led_cdev->brightness_set_blocking = lm3601x_brightness_set;
>> +       led_cdev->max_brightness = DIV_ROUND_UP(led->torch_current_max,
>> +                                               LM3601X_TORCH_REG_DIV);
>> +       led_cdev->flags |= LED_DEV_CAP_FLASH;
>> +
>> +       return led_classdev_flash_register(&led->client->dev, &led->fled_cdev);
>> +}
>> +
>> +static int lm3601x_parse_node(struct lm3601x_led *led,
> 
>> +                             struct device_node *node)
> 
> I don't see how it's used.

Removed

> 
>> +{
>> +       struct fwnode_handle *child = NULL;
>> +       int ret = -ENODEV;
>> +       const char *name;
>> +
>> +       child = device_get_next_child_node(&led->client->dev, child);
>> +       if (!child) {
>> +               dev_err(&led->client->dev, "No LED Child node\n");
>> +               return ret;
>> +       }
>> +
>> +       ret = fwnode_property_read_u32(child, "reg", &led->led_mode);
>> +       if (ret) {
>> +               dev_err(&led->client->dev, "reg DT property missing\n");
>> +               goto out_err;
>> +       }
>> +
>> +       if (led->led_mode > LM3601X_LED_TORCH ||
>> +           led->led_mode < LM3601X_LED_IR) {
>> +               dev_warn(&led->client->dev, "Invalid led mode requested\n");
>> +               ret = -EINVAL;
>> +               goto out_err;
>> +       }
>> +
>> +       ret = fwnode_property_read_string(child, "label", &name);
>> +       if (ret) {
>> +               if (led->led_mode == LM3601X_LED_TORCH)
>> +                       name = "torch";
>> +               else
>> +                       name = "infrared";
>> +       }
>> +
>> +       snprintf(led->led_name, sizeof(led->led_name),
>> +               "%s:%s", led->client->name, name);
>> +
>> +       ret = fwnode_property_read_u32(child, "led-max-microamp",
>> +                                       &led->torch_current_max);
> 
>> +       if (ret < 0) {
> 
> Be consistent with above or other way around.

Fixed

> 
>> +               dev_warn(&led->client->dev,
>> +                       "led-max-microamp DT property missing\n");
>> +               goto out_err;
>> +       }
>> +
>> +       ret = fwnode_property_read_u32(child, "flash-max-microamp",
>> +                               &led->flash_current_max);
>> +       if (ret < 0) {
>> +               dev_warn(&led->client->dev,
>> +                        "flash-max-microamp DT property missing\n");
>> +               goto out_err;
>> +       }
>> +
>> +       ret = fwnode_property_read_u32(child, "flash-max-timeout-us",
>> +                               &led->max_flash_timeout);
>> +       if (ret < 0) {
>> +               dev_warn(&led->client->dev,
>> +                        "flash-max-timeout-us DT property missing\n");
>> +               goto out_err;
>> +       }
>> +
>> +out_err:
>> +       fwnode_handle_put(child);
>> +       return ret;
>> +}
>> +
>> +static int lm3601x_probe(struct i2c_client *client,
>> +                       const struct i2c_device_id *id)
>> +{
>> +       struct lm3601x_led *led;
> 
>> +       int err;
> 
> Be consistent, either err everywhere, or ret.

Seems pedantic but I will change it

> 
>> +
>> +       led = devm_kzalloc(&client->dev, sizeof(*led), GFP_KERNEL);
>> +       if (!led)
>> +               return -ENOMEM;
>> +
>> +       led->client = client;
>> +       i2c_set_clientdata(client, led);
>> +
> 
>> +       err = lm3601x_parse_node(led, client->dev.of_node);
> 
> Can't you use dev_fwnode() helper?
> It seems it's even not used inside the function.

Dropping of_node anyway it is unused

> 
>> +       if (err < 0)
>> +               return -ENODEV;
>> +
>> +       led->regmap = devm_regmap_init_i2c(client, &lm3601x_regmap);
>> +       if (IS_ERR(led->regmap)) {
>> +               err = PTR_ERR(led->regmap);
>> +               dev_err(&client->dev,
>> +                       "Failed to allocate register map: %d\n", err);
>> +               return err;
>> +       }
>> +
>> +       mutex_init(&led->lock);
>> +
>> +       return lm3601x_register_leds(led);
>> +}
>> +
>> +static int lm3601x_remove(struct i2c_client *client)
>> +{
>> +       struct lm3601x_led *led = i2c_get_clientdata(client);
>> +
>> +       led_classdev_flash_unregister(&led->fled_cdev);
>> +       mutex_destroy(&led->lock);
>> +
>> +       return regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
>> +                          LM3601X_ENABLE_MASK,
>> +                          LM3601X_MODE_STANDBY);
>> +}
>> +
> 
>> +static const struct i2c_device_id lm3601x_id[] = {
>> +       { "LM36010", CHIP_LM36010 },
>> +       { "LM36011", CHIP_LM36011 },
>> +       { }
>> +};
>> +MODULE_DEVICE_TABLE(i2c, lm3601x_id);
> 
> Are you going to use it as a pure i2c driver? If yes, I would like to hear why.
> Otherwise just switch to ->probe_new().

I was going to use the id variable but with code changes I don't use it anymore so
I can convert the driver.

Dan

> 
>> +
>> +static const struct of_device_id of_lm3601x_leds_match[] = {
>> +       { .compatible = "ti,lm36010", },
>> +       { .compatible = "ti,lm36011", },
>> +       { }
>> +};
>> +MODULE_DEVICE_TABLE(of, of_lm3601x_leds_match);
>> +
>> +static struct i2c_driver lm3601x_i2c_driver = {
>> +       .driver = {
>> +               .name = "lm3601x",
>> +               .of_match_table = of_lm3601x_leds_match,
>> +       },
>> +       .probe = lm3601x_probe,
>> +       .remove = lm3601x_remove,
>> +       .id_table = lm3601x_id,
>> +};
>> +module_i2c_driver(lm3601x_i2c_driver);
>> +
>> +MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3601X");
>> +MODULE_AUTHOR("Dan Murphy <dmurphy@xxxxxx>");
>> +MODULE_LICENSE("GPL v2");
>> --
>> 2.17.0.582.gccdcbd54c
>>
> 
> 
> 


-- 
------------------
Dan Murphy
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