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authorLukasz Majewski <l.majewski@majess.pl>2017-01-29 22:54:08 +0100
committerThierry Reding <thierry.reding@gmail.com>2017-01-30 09:12:42 +0100
commitb3c088fe0297d7580bef5d5830fa5fc69ae8443c (patch)
treeb062d963b3f8b7cdab2fa00811fa5480cc649f33 /drivers/pwm/pwm-imx.c
parent0038922954236a6af424e2604ece88404dfbc41c (diff)
pwm: imx: Rewrite v1 code to facilitate switch to atomic PWM
The code has been rewritten to remove "generic" calls to imx_pwm_{enable|disable|config}. Such approach would facilitate switch to atomic PWM (a.k.a ->apply()) implementation. Suggested-by: Stefan Agner <stefan@agner.ch> Suggested-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Lukasz Majewski <l.majewski@majess.pl> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'drivers/pwm/pwm-imx.c')
-rw-r--r--drivers/pwm/pwm-imx.c32
1 files changed, 22 insertions, 10 deletions
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index c405cb777808..5c712104066a 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -90,19 +90,33 @@ static int imx_pwm_config_v1(struct pwm_chip *chip,
return 0;
}
-static void imx_pwm_set_enable_v1(struct pwm_chip *chip, bool enable)
+static int imx_pwm_enable_v1(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct imx_chip *imx = to_imx_chip(chip);
u32 val;
+ int ret;
+
+ ret = clk_prepare_enable(imx->clk_per);
+ if (ret < 0)
+ return ret;
val = readl(imx->mmio_base + MX1_PWMC);
+ val |= MX1_PWMC_EN;
+ writel(val, imx->mmio_base + MX1_PWMC);
- if (enable)
- val |= MX1_PWMC_EN;
- else
- val &= ~MX1_PWMC_EN;
+ return 0;
+}
+
+static void imx_pwm_disable_v1(struct pwm_chip *chip, struct pwm_device *pwm)
+{
+ struct imx_chip *imx = to_imx_chip(chip);
+ u32 val;
+ val = readl(imx->mmio_base + MX1_PWMC);
+ val &= ~MX1_PWMC_EN;
writel(val, imx->mmio_base + MX1_PWMC);
+
+ clk_disable_unprepare(imx->clk_per);
}
static int imx_pwm_config_v2(struct pwm_chip *chip,
@@ -240,9 +254,9 @@ static void imx_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
}
static const struct pwm_ops imx_pwm_ops_v1 = {
- .enable = imx_pwm_enable,
- .disable = imx_pwm_disable,
- .config = imx_pwm_config,
+ .enable = imx_pwm_enable_v1,
+ .disable = imx_pwm_disable_v1,
+ .config = imx_pwm_config_v1,
.owner = THIS_MODULE,
};
@@ -261,8 +275,6 @@ struct imx_pwm_data {
};
static struct imx_pwm_data imx_pwm_data_v1 = {
- .config = imx_pwm_config_v1,
- .set_enable = imx_pwm_set_enable_v1,
.ops = &imx_pwm_ops_v1,
};

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