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Message-ID: <1413350495-40980-3-git-send-email-Li.Xiubo@freescale.com>
Date: Wed, 15 Oct 2014 13:21:34 +0800
From: Xiubo Li <Li.Xiubo@...escale.com>
To: <thierry.reding@...il.com>, <linux-pwm@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH v2 2/3] 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@...escale.com>
---
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)
--
2.1.0.27.g96db324
--
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