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Commit 63b501e2 authored by Haojian Zhuang's avatar Haojian Zhuang Committed by Samuel Ortiz
Browse files

mfd: max8925: Use register offset as REG in backlight 



Remove the register offset definition. All these register offset
are transfered as IORESOURCE_REG resources.

Signed-off-by: default avatarHaojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 70ffd691

drivers/mfd/max8925-core.c

+14 −17
Original line number Diff line number Diff line
@@ -18,20 +18,16 @@ 
#include <linux/mfd/core.h>

#include <linux/mfd/max8925.h>



static struct resource backlight_resources[] = {

	{

		.name	= "max8925-backlight",

		.start	= MAX8925_WLED_MODE_CNTL,

		.end	= MAX8925_WLED_CNTL,

		.flags	= IORESOURCE_REG,

	},

static struct resource bk_resources[] __devinitdata = {

	{ 0x84, 0x84, "mode control", IORESOURCE_REG, },

	{ 0x85, 0x85, "control",      IORESOURCE_REG, },

};



static struct mfd_cell backlight_devs[] = {

static struct mfd_cell bk_devs[] __devinitdata = {

	{

		.name		= "max8925-backlight",

		.num_resources	= 1,

		.resources	= &backlight_resources[0],

		.num_resources	= ARRAY_SIZE(bk_resources),

		.resources	= &bk_resources[0],

		.id		= -1,

	},

};
@@ -623,14 +619,15 @@ int __devinit max8925_device_init(struct max8925_chip *chip, 
	}



	if (pdata && pdata->backlight) {

		ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],

				      ARRAY_SIZE(backlight_devs),

				      &backlight_resources[0], 0, NULL);

		bk_devs[0].platform_data = &pdata->backlight;

		bk_devs[0].pdata_size = sizeof(struct max8925_backlight_pdata);

	}

	ret = mfd_add_devices(chip->dev, 0, bk_devs, ARRAY_SIZE(bk_devs),

			      NULL, 0, NULL);

	if (ret < 0) {

		dev_err(chip->dev, "Failed to add backlight subdev\n");

		goto out_dev;

	}

	}



	if (pdata && pdata->power) {

		ret = mfd_add_devices(chip->dev, 0, &power_devs[0],

drivers/video/backlight/max8925_bl.c

+41 −38
Original line number Diff line number Diff line
@@ -28,6 +28,8 @@ struct max8925_backlight_data { 
	struct max8925_chip	*chip;



	int	current_brightness;

	int	reg_mode_cntl;

	int	reg_cntl;

};



static int max8925_backlight_set(struct backlight_device *bl, int brightness)
@@ -42,16 +44,16 @@ static int max8925_backlight_set(struct backlight_device *bl, int brightness) 
	else

		value = brightness;



	ret = max8925_reg_write(chip->i2c, MAX8925_WLED_CNTL, value);

	ret = max8925_reg_write(chip->i2c, data->reg_cntl, value);

	if (ret < 0)

		goto out;



	if (!data->current_brightness && brightness)

		/* enable WLED output */

		ret = max8925_set_bits(chip->i2c, MAX8925_WLED_MODE_CNTL, 1, 1);

		ret = max8925_set_bits(chip->i2c, data->reg_mode_cntl, 1, 1);

	else if (!brightness)

		/* disable WLED output */

		ret = max8925_set_bits(chip->i2c, MAX8925_WLED_MODE_CNTL, 1, 0);

		ret = max8925_set_bits(chip->i2c, data->reg_mode_cntl, 1, 0);

	if (ret < 0)

		goto out;

	dev_dbg(chip->dev, "set brightness %d\n", value);
@@ -85,7 +87,7 @@ static int max8925_backlight_get_brightness(struct backlight_device *bl) 
	struct max8925_chip *chip = data->chip;

	int ret;



	ret = max8925_reg_read(chip->i2c, MAX8925_WLED_CNTL);

	ret = max8925_reg_read(chip->i2c, data->reg_cntl);

	if (ret < 0)

		return -EINVAL;

	data->current_brightness = ret;
@@ -102,69 +104,70 @@ static const struct backlight_ops max8925_backlight_ops = { 
static int __devinit max8925_backlight_probe(struct platform_device *pdev)

{

	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);

	struct max8925_platform_data *max8925_pdata;

	struct max8925_backlight_pdata *pdata = NULL;

	struct max8925_backlight_pdata *pdata = pdev->dev.platform_data;

	struct max8925_backlight_data *data;

	struct backlight_device *bl;

	struct backlight_properties props;

	struct resource *res;

	char name[MAX8925_NAME_SIZE];

	unsigned char value;

	int ret;



	res = platform_get_resource(pdev, IORESOURCE_REG, 0);

	if (res == NULL) {

		dev_err(&pdev->dev, "No I/O resource!\n");

		return -EINVAL;

	}



	if (pdev->dev.parent->platform_data) {

		max8925_pdata = pdev->dev.parent->platform_data;

		pdata = max8925_pdata->backlight;

	}



	if (!pdata) {

		dev_err(&pdev->dev, "platform data isn't assigned to "

			"backlight\n");

		return -EINVAL;

	}

	int ret = 0;



	data = devm_kzalloc(&pdev->dev, sizeof(struct max8925_backlight_data),

			    GFP_KERNEL);

	if (data == NULL)

		return -ENOMEM;

	strncpy(name, res->name, MAX8925_NAME_SIZE);



	res = platform_get_resource(pdev, IORESOURCE_REG, 0);

	if (!res) {

		dev_err(&pdev->dev, "No REG resource for mode control!\n");

		ret = -ENXIO;

		goto out;

	}

	data->reg_mode_cntl = res->start;

	res = platform_get_resource(pdev, IORESOURCE_REG, 1);

	if (!res) {

		dev_err(&pdev->dev, "No REG resource for control!\n");

		ret = -ENXIO;

		goto out;

	}

	data->reg_cntl = res->start;



	data->chip = chip;

	data->current_brightness = 0;



	memset(&props, 0, sizeof(struct backlight_properties));

	props.type = BACKLIGHT_RAW;

	props.max_brightness = MAX_BRIGHTNESS;

	bl = backlight_device_register(name, &pdev->dev, data,

	bl = backlight_device_register("max8925-backlight", &pdev->dev, data,

					&max8925_backlight_ops, &props);

	if (IS_ERR(bl)) {

		dev_err(&pdev->dev, "failed to register backlight\n");

		return PTR_ERR(bl);

		ret = PTR_ERR(bl);

		goto out;

	}

	bl->props.brightness = MAX_BRIGHTNESS;



	platform_set_drvdata(pdev, bl);



	value = 0;

	if (pdata) {

		if (pdata->lxw_scl)

			value |= (1 << 7);

		if (pdata->lxw_freq)

			value |= (LWX_FREQ(pdata->lxw_freq) << 4);

		if (pdata->dual_string)

			value |= (1 << 1);

	ret = max8925_set_bits(chip->i2c, MAX8925_WLED_MODE_CNTL, 0xfe, value);

	}

	ret = max8925_set_bits(chip->i2c, data->reg_mode_cntl, 0xfe, value);

	if (ret < 0)

		goto out;

		goto out_brt;



	backlight_update_status(bl);

	return 0;

out:

out_brt:

	backlight_device_unregister(bl);

out:

	devm_kfree(&pdev->dev, data);

	return ret;

}