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misc: cs40l2x: Add bounds checking to click comp. enable control

Browse source 
Added a safety check such that all non-zero values written to the
comp_enable control are translated to '1' when passed to the DSP.

Change-Id: I359def9737eeb8e1f77abdd76ce8d7a3ef069ee5
Signed-off-by: Jeff LaBundy <jeff.labundy@cirrus.com>
Signed-off-by: Ravi Vembu <raviv@motorola.com>
Mot-CRs-Fixed: (CR)
Reviewed-on: https://gerrit.mot.com/1202247
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Submit-Approved: Jira Key
This commit is contained in:
Jeff LaBundy 2018-06-07 06:44:52 -05:00 • committed by Ravikumar Vembu
commit 58e01af0a2
2 changed files with 6 additions and 2 deletions
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5
drivers/misc/cs40l2x.c
View file

@ -794,7 +794,7 @@ static ssize_t cs40l2x_comp_enable_show(struct device *dev,
mutex_lock(&cs40l2x->lock);
ret = regmap_read(cs40l2x->regmap,
cs40l2x_dsp_reg(cs40l2x, "COMPENSATION_ENABLE",
CS40L2X_XM_UNPACKED_TYPE), &val);
CS40L2X_XM_UNPACKED_TYPE), &val);
mutex_unlock(&cs40l2x->lock);
if (ret) {
@ -820,7 +820,8 @@ static ssize_t cs40l2x_comp_enable_store(struct device *dev,
mutex_lock(&cs40l2x->lock);
ret = regmap_write(cs40l2x->regmap,
cs40l2x_dsp_reg(cs40l2x, "COMPENSATION_ENABLE",
CS40L2X_XM_UNPACKED_TYPE), val);
CS40L2X_XM_UNPACKED_TYPE),
val ? CS40L2X_COMP_ENABLED : CS40L2X_COMP_DISABLED);
mutex_unlock(&cs40l2x->lock);
if (ret) {

3
drivers/misc/cs40l2x.h
View file

@ -754,6 +754,9 @@
#define CS40L2X_GPIO1_ENABLED 1
#define CS40L2X_GPIO1_DISABLED 0
#define CS40L2X_COMP_ENABLED 1
#define CS40L2X_COMP_DISABLED 0
bool cs40l2x_readable_reg(struct device *dev, unsigned int reg);
bool cs40l2x_precious_reg(struct device *dev, unsigned int reg);