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

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>

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index f75cdcc..53293c7 100644 (file)
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -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,