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| author |   Xiubo Li <Li.Xiubo@freescale.com> | 2014-10-15 13:21:34 +0800 |
|---|---|---|
| committer |   Thierry Reding <thierry.reding@gmail.com> | 2014-12-01 10:44:48 +0100 |
| commit | 49599cf6bb8098ecde64f2bda3337b5fcf6323c5 (patch) | |
| tree | 71d8a9af13bf026606d39e25c1a734835477e469 /drivers/pwm | |
| parent | pwm: ftm: Correctly track usage count (diff) | |
| download | linux-dev-49599cf6bb8098ecde64f2bda3337b5fcf6323c5.tar.xz linux-dev-49599cf6bb8098ecde64f2bda3337b5fcf6323c5.zip | |
pwm: ftm: Add regmap rbtree type cache support
This patch is to prepare for adding PM support for FTM PWM driver using
callback function suspend and resume in .driver.pm of platform_driver.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-fsl-ftm.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c index 1150598b7532..9bfbea5dbf2f 100644 --- a/drivers/pwm/pwm-fsl-ftm.c +++ b/drivers/pwm/pwm-fsl-ftm.c @@ -397,12 +397,23 @@ static int fsl_pwm_init(struct fsl_pwm_chip *fpc) return 0; } +static bool fsl_pwm_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case FTM_CNT: + return true; + } + return false; +} + static const struct regmap_config fsl_pwm_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, .max_register = FTM_PWMLOAD, + .volatile_reg = fsl_pwm_volatile_reg, + .cache_type = REGCACHE_RBTREE, }; static int fsl_pwm_probe(struct platform_device *pdev) |