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mfd: wcd934x: Mark CPE registers as volatile

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Some of the CPE (Codec Processing Engine) registers in wcd934x audio
codec are read-write registers with only few bits that are read-only.
Add change to mark such registers as volatile to avoid reading stale
value from cache for the read-only bits.

CRs-Fixed: 1049012
Change-Id: I6d77cf57e940c9efa6be64565d9ea7d328f0cd9b
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
This commit is contained in:
Bhalchandra Gajare 2016-08-17 12:05:25 -07:00
parent 008f057bba
commit 4087c68e23
1 changed files with 4 additions and 0 deletions
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4
drivers/mfd/wcd934x-regmap.c
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@ -1854,6 +1854,10 @@ static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg)
*/
switch (reg) {
case WCD934X_CPE_SS_SOC_SW_COLLAPSE_CTL:
case WCD934X_CPE_SS_PWR_SYS_PSTATE_CTL_0:
case WCD934X_CPE_SS_PWR_SYS_PSTATE_CTL_1:
case WCD934X_CPE_SS_CPAR_CTL:
case WCD934X_CPE_SS_STATUS:
return true;
}