diff options
| author | Lukasz Majewski <l.majewski@majess.pl> | 2017-01-30 00:54:08 +0300 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2017-01-30 11:12:42 +0300 |
| commit | b3c088fe0297d7580bef5d5830fa5fc69ae8443c (patch) | |
| tree | b062d963b3f8b7cdab2fa00811fa5480cc649f33 /drivers/pwm | |
| parent | 0038922954236a6af424e2604ece88404dfbc41c (diff) | |
| download | linux-b3c088fe0297d7580bef5d5830fa5fc69ae8443c.tar.xz | |
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')
| -rw-r--r-- | drivers/pwm/pwm-imx.c | 32 |
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, }; |