From: Xiubo Li
Date: Wed, 15 Oct 2014 05:21:34 +0000 (+0800)
Subject: pwm: ftm: Add regmap rbtree type cache support
X-Git-Tag: v3.19-rc1~47^2~2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=49599cf6bb8098ecde64f2bda3337b5fcf6323c5;p=karo-tx-linux.git
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
---
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)