4  * General device driver for TI lm3646, Dual FLASH LED Driver
81 static int lm3646_mode_ctrl(struct lm3646_flash *flash,  in lm3646_mode_ctrl()  argument
86 		return regmap_write(flash->regmap,  in lm3646_mode_ctrl()
87 				    REG_ENABLE, flash->mode_reg | MODE_SHDN);  in lm3646_mode_ctrl()
89 		return regmap_write(flash->regmap,  in lm3646_mode_ctrl()
90 				    REG_ENABLE, flash->mode_reg | MODE_TORCH);  in lm3646_mode_ctrl()
92 		return regmap_write(flash->regmap,  in lm3646_mode_ctrl()
93 				    REG_ENABLE, flash->mode_reg | MODE_FLASH);  in lm3646_mode_ctrl()
101 	struct lm3646_flash *flash = to_lm3646_flash(ctrl);  in lm3646_get_ctrl()  local
108 	rval = regmap_read(flash->regmap, REG_FLAG, &reg_val);  in lm3646_get_ctrl()
135 	struct lm3646_flash *flash = to_lm3646_flash(ctrl);  in lm3646_set_ctrl()  local
143 			return lm3646_mode_ctrl(flash, ctrl->val);  in lm3646_set_ctrl()
144 		/* switch to SHDN mode before flash strobe on */  in lm3646_set_ctrl()
145 		return lm3646_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);  in lm3646_set_ctrl()
148 		return regmap_update_bits(flash->regmap,  in lm3646_set_ctrl()
154 		/* read and check current mode of chip to start flash */  in lm3646_set_ctrl()
155 		rval = regmap_read(flash->regmap, REG_ENABLE, &reg_val);  in lm3646_set_ctrl()
158 		/* flash on */  in lm3646_set_ctrl()
159 		return lm3646_mode_ctrl(flash, V4L2_FLASH_LED_MODE_FLASH);  in lm3646_set_ctrl()
164 		 * flash mode will be turned automatically  in lm3646_set_ctrl()
165 		 * from FLASH mode to SHDN mode after flash duration timeout  in lm3646_set_ctrl()
166 		 * read and check current mode of chip to stop flash  in lm3646_set_ctrl()
168 		rval = regmap_read(flash->regmap, REG_ENABLE, &reg_val);  in lm3646_set_ctrl()
172 			return lm3646_mode_ctrl(flash,  in lm3646_set_ctrl()
177 		return regmap_update_bits(flash->regmap,  in lm3646_set_ctrl()
183 		return regmap_update_bits(flash->regmap,  in lm3646_set_ctrl()
189 		return regmap_update_bits(flash->regmap,  in lm3646_set_ctrl()
203 static int lm3646_init_controls(struct lm3646_flash *flash)  in lm3646_init_controls()  argument
206 	struct v4l2_ctrl_handler *hdl = &flash->ctrls_led;  in lm3646_init_controls()
210 	/* flash mode */  in lm3646_init_controls()
215 	/* flash source */  in lm3646_init_controls()
219 	/* flash strobe */  in lm3646_init_controls()
221 	/* flash strobe stop */  in lm3646_init_controls()
224 	/* flash strobe timeout */  in lm3646_init_controls()
228 			  LM3646_FLASH_TOUT_STEP, flash->pdata->flash_timeout);  in lm3646_init_controls()
230 	/* max flash current */  in lm3646_init_controls()
256 	flash->subdev_led.ctrl_handler = hdl;  in lm3646_init_controls()
271 static int lm3646_subdev_init(struct lm3646_flash *flash)  in lm3646_subdev_init()  argument
273 	struct i2c_client *client = to_i2c_client(flash->dev);  in lm3646_subdev_init()
276 	v4l2_i2c_subdev_init(&flash->subdev_led, client, &lm3646_ops);  in lm3646_subdev_init()
277 	flash->subdev_led.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;  in lm3646_subdev_init()
278 	strscpy(flash->subdev_led.name, LM3646_NAME,  in lm3646_subdev_init()
279 		sizeof(flash->subdev_led.name));  in lm3646_subdev_init()
280 	rval = lm3646_init_controls(flash);  in lm3646_subdev_init()
283 	rval = media_entity_pads_init(&flash->subdev_led.entity, 0, NULL);  in lm3646_subdev_init()
286 	flash->subdev_led.entity.function = MEDIA_ENT_F_FLASH;  in lm3646_subdev_init()
290 	v4l2_ctrl_handler_free(&flash->ctrls_led);  in lm3646_subdev_init()
294 static int lm3646_init_device(struct lm3646_flash *flash)  in lm3646_init_device()  argument
300 	rval = regmap_read(flash->regmap, REG_ENABLE, &reg_val);  in lm3646_init_device()
303 	flash->mode_reg = reg_val & 0xfc;  in lm3646_init_device()
306 	rval = lm3646_mode_ctrl(flash, V4L2_FLASH_LED_MODE_NONE);  in lm3646_init_device()
311 	 * LED1 flash current setting  in lm3646_init_device()
312 	 * LED2 flash current = Total(Max) flash current - LED1 flash current  in lm3646_init_device()
314 	rval = regmap_update_bits(flash->regmap,  in lm3646_init_device()
317 				  (flash->pdata->led1_flash_brt));  in lm3646_init_device()
326 	rval = regmap_update_bits(flash->regmap,  in lm3646_init_device()
329 				  (flash->pdata->led1_torch_brt));  in lm3646_init_device()
334 	return regmap_read(flash->regmap, REG_FLAG, &reg_val);  in lm3646_init_device()
340 	struct lm3646_flash *flash;  in lm3646_probe()  local
344 	flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);  in lm3646_probe()
345 	if (flash == NULL)  in lm3646_probe()
348 	flash->regmap = devm_regmap_init_i2c(client, &lm3646_regmap);  in lm3646_probe()
349 	if (IS_ERR(flash->regmap))  in lm3646_probe()
350 		return PTR_ERR(flash->regmap);  in lm3646_probe()
364 	flash->pdata = pdata;  in lm3646_probe()
365 	flash->dev = &client->dev;  in lm3646_probe()
367 	rval = lm3646_subdev_init(flash);  in lm3646_probe()
371 	rval = lm3646_init_device(flash);  in lm3646_probe()
375 	i2c_set_clientdata(client, flash);  in lm3646_probe()
382 	struct lm3646_flash *flash = i2c_get_clientdata(client);  in lm3646_remove()  local
384 	v4l2_device_unregister_subdev(&flash->subdev_led);  in lm3646_remove()
385 	v4l2_ctrl_handler_free(&flash->ctrls_led);  in lm3646_remove()
386 	media_entity_cleanup(&flash->subdev_led.entity);  in lm3646_remove()
411 MODULE_DESCRIPTION("Texas Instruments LM3646 Dual Flash LED driver");