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Commit ca76ceb8 authored by Mark Brown's avatar Mark Brown
Browse files

mfd: arizona: Read the device identification information after boot 



Future devices may not fully report the device identification information
until their boot sequence is complete so defer acting on these until that
has finished.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent f722406f

drivers/mfd/arizona-core.c

+49 −31
Original line number Diff line number Diff line
@@ -536,51 +536,22 @@ int arizona_dev_init(struct arizona *arizona) 


	regcache_cache_only(arizona->regmap, false);



	/* Verify that this is a chip we know about */

	ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);

	if (ret != 0) {

		dev_err(dev, "Failed to read ID register: %d\n", ret);

		goto err_reset;

	}



	ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,

			  &arizona->rev);

	if (ret != 0) {

		dev_err(dev, "Failed to read revision register: %d\n", ret);

		goto err_reset;

	}

	arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;



	switch (reg) {

#ifdef CONFIG_MFD_WM5102

	case 0x5102:

		type_name = "WM5102";

		if (arizona->type != WM5102) {

			dev_err(arizona->dev, "WM5102 registered as %d\n",

				arizona->type);

			arizona->type = WM5102;

		}

		apply_patch = wm5102_patch;

		arizona->rev &= 0x7;

		break;

#endif

#ifdef CONFIG_MFD_WM5110

	case 0x5110:

		type_name = "WM5110";

		if (arizona->type != WM5110) {

			dev_err(arizona->dev, "WM5110 registered as %d\n",

				arizona->type);

			arizona->type = WM5110;

		}

		apply_patch = wm5110_patch;

		break;

#endif

	default:

		dev_err(arizona->dev, "Unknown device ID %x\n", reg);

		dev_err(arizona->dev, "Unknown device ID: %x\n", reg);

		goto err_reset;

	}



	dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');



	/* If we have a /RESET GPIO we'll already be reset */

	if (!arizona->pdata.reset) {

		regcache_mark_dirty(arizona->regmap);
@@ -600,6 +571,7 @@ int arizona_dev_init(struct arizona *arizona) 
		}

	}



	/* Ensure device startup is complete */

	switch (arizona->type) {

	case WM5102:

		ret = regmap_read(arizona->regmap, 0x19, &val);
@@ -620,6 +592,52 @@ int arizona_dev_init(struct arizona *arizona) 
		break;

	}



	/* Read the device ID information & do device specific stuff */

	ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);

	if (ret != 0) {

		dev_err(dev, "Failed to read ID register: %d\n", ret);

		goto err_reset;

	}



	ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,

			  &arizona->rev);

	if (ret != 0) {

		dev_err(dev, "Failed to read revision register: %d\n", ret);

		goto err_reset;

	}

	arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;



	switch (reg) {

#ifdef CONFIG_MFD_WM5102

	case 0x5102:

		type_name = "WM5102";

		if (arizona->type != WM5102) {

			dev_err(arizona->dev, "WM5102 registered as %d\n",

				arizona->type);

			arizona->type = WM5102;

		}

		apply_patch = wm5102_patch;

		arizona->rev &= 0x7;

		break;

#endif

#ifdef CONFIG_MFD_WM5110

	case 0x5110:

		type_name = "WM5110";

		if (arizona->type != WM5110) {

			dev_err(arizona->dev, "WM5110 registered as %d\n",

				arizona->type);

			arizona->type = WM5110;

		}

		apply_patch = wm5110_patch;

		break;

#endif

	default:

		dev_err(arizona->dev, "Unknown device ID %x\n", reg);

		goto err_reset;

	}



	dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');



	if (apply_patch) {

		ret = apply_patch(arizona);

		if (ret != 0) {