Messages in this thread Patch in this message | | | From | Mark Brown <> | Subject | [PATCH] mfd: arizona: Sync regcache after reset | Date | Tue, 20 Nov 2012 14:49:10 +0900 |
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From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
In the absence of a physical reset line the chip is reset by writing the first register, which is done after the register patch has been applied. This patch synchronises the register cache after the reset to preserve any register changes that had been applied.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> --- drivers/mfd/arizona-core.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index 202bf55..f4f9bf8 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -415,11 +415,19 @@ int __devinit arizona_dev_init(struct arizona *arizona) /* If we have a /RESET GPIO we'll already be reset */ if (!arizona->pdata.reset) { + regcache_mark_dirty(arizona->regmap); + ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0); if (ret != 0) { dev_err(dev, "Failed to reset device: %d\n", ret); goto err_reset; } + + ret = regcache_sync(arizona->regmap); + if (ret != 0) { + dev_err(dev, "Failed to sync device: %d\n", ret); + goto err_reset; + } } ret = arizona_wait_for_boot(arizona); -- 1.7.10.4
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