diff options
| author | Bhalchandra Gajare <gajare@codeaurora.org> | 2016-08-01 16:23:32 -0700 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-08-02 20:21:27 -0700 |
| commit | 3cf508f6463c649d79b8a8a808ad7a92d403e0e5 (patch) | |
| tree | fbe47c8c910fde366320ccf31b5b5a3c95eb7ed1 /drivers | |
| parent | ec9fd7cc51bcc302aefe26e4cbfc7f4e2590918d (diff) | |
mfd: wcd934x: Mark CPE registers as volatile
Currently only read-only registers are marked as volatile. It is
possible that some registers could be read-write and still have
subset of the bits that are updated by the hardware. Add change
to mark such CPE (codec processing engine) register as volatile.
CRs-Fixed: 1049012
Change-Id: I1cedf646d0df1ab5968df4830502649de305c9d1
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/wcd934x-regmap.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mfd/wcd934x-regmap.c b/drivers/mfd/wcd934x-regmap.c index 9a09f87d8472..398f0086537a 100644 --- a/drivers/mfd/wcd934x-regmap.c +++ b/drivers/mfd/wcd934x-regmap.c @@ -1848,6 +1848,15 @@ static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg) if (reg_tbl && reg_tbl[reg_offset] == WCD934X_READ) return true; + /* + * Need to mark volatile for registers that are writable but + * only few bits are read-only + */ + switch (reg) { + case WCD934X_CPE_SS_SOC_SW_COLLAPSE_CTL: + return true; + } + return false; } |