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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>
This commit is contained in:
Lukasz Majewski 2017-01-29 22:54:08 +01:00 committed by Thierry Reding
parent 0038922954
commit b3c088fe02
1 changed files with 24 additions and 12 deletions
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36
drivers/pwm/pwm-imx.c
View File

@ -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);
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);
if (enable)
val |= MX1_PWMC_EN;
else
val &= ~MX1_PWMC_EN;
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,
};