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mfd: Use regcache_sync_region() to sync wm8994 GPIO registers on suspend

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Now we have regcache sync region we can use it to do a more efficient
sync of the pin configuration after we reset the device during suspend.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2012-06-29 14:55:39 +01:00 committed by Samuel Ortiz
parent 59db96913c
commit ed393dcd41
1 changed files with 4 additions and 9 deletions
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13
drivers/mfd/wm8994-core.c
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@ -196,7 +196,6 @@ static int wm8994_suspend(struct device *dev)
{
struct wm8994 *wm8994 = dev_get_drvdata(dev);
int ret;
int gpio_regs[WM8994_NUM_GPIO_REGS];
/* Don't actually go through with the suspend if the CODEC is
* still active (eg, for audio passthrough from CP. */
@ -278,27 +277,23 @@ static int wm8994_suspend(struct device *dev)
WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);
/* Save GPIO registers before reset */
regmap_bulk_read(wm8994->regmap, WM8994_GPIO_1, gpio_regs,
WM8994_NUM_GPIO_REGS);
/* Explicitly put the device into reset in case regulators
* don't get disabled in order to ensure consistent restart.
*/
wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
regcache_mark_dirty(wm8994->regmap);
/* Restore GPIO registers to prevent problems with mismatched
* pin configurations.
*/
ret = regmap_bulk_write(wm8994->regmap, WM8994_GPIO_1, gpio_regs,
WM8994_NUM_GPIO_REGS);
ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
WM8994_GPIO_11);
if (ret != 0)
dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
regcache_cache_only(wm8994->regmap, true);
regcache_mark_dirty(wm8994->regmap);
wm8994->suspended = true;
ret = regulator_bulk_disable(wm8994->num_supplies,