From 49599cf6bb8098ecde64f2bda3337b5fcf6323c5 Mon Sep 17 00:00:00 2001 From: Xiubo Li Date: Wed, 15 Oct 2014 13:21:34 +0800 Subject: [PATCH] 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 Signed-off-by: Thierry Reding --- drivers/pwm/pwm-fsl-ftm.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/pwm/pwm-fsl-ftm.c b/drivers/pwm/pwm-fsl-ftm.c index 1150598..9bfbea5 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) -- 2.7.4