With this patch the polarity settings for i.MX's PWMv2 is now supported on top of atomic PWM setting
Signed-off-by: Bhuvanchandra DV <bhuvanchandra...@toradex.com> Signed-off-by: Lukasz Majewski <l.majew...@majess.pl> --- Changes for v3: - None Changes for v2: - New patch --- drivers/pwm/pwm-imx.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c index b636526..03b01a4 100644 --- a/drivers/pwm/pwm-imx.c +++ b/drivers/pwm/pwm-imx.c @@ -38,6 +38,7 @@ #define MX3_PWMCR_DOZEEN (1 << 24) #define MX3_PWMCR_WAITEN (1 << 23) #define MX3_PWMCR_DBGEN (1 << 22) +#define MX3_PWMCR_POUTC (1 << 18) #define MX3_PWMCR_CLKSRC_IPG_HIGH (2 << 16) #define MX3_PWMCR_CLKSRC_IPG (1 << 16) #define MX3_PWMCR_SWR (1 << 3) @@ -215,6 +216,9 @@ static int imx_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm, if (state->enabled) cr |= MX3_PWMCR_EN; + if (state->polarity == PWM_POLARITY_INVERSED) + cr |= MX3_PWMCR_POUTC; + writel(cr, imx->mmio_base + MX3_PWMCR); /* Disable the clock if the PWM is being disabled. */ @@ -237,6 +241,7 @@ static struct pwm_ops imx_pwm_ops_v2 = { }; struct imx_pwm_data { + bool polarity_supported; struct pwm_ops *pwm_ops; }; @@ -245,6 +250,7 @@ static struct imx_pwm_data imx_pwm_data_v1 = { }; static struct imx_pwm_data imx_pwm_data_v2 = { + .polarity_supported = true, .pwm_ops = &imx_pwm_ops_v2, }; @@ -285,6 +291,11 @@ static int imx_pwm_probe(struct platform_device *pdev) imx->chip.base = -1; imx->chip.npwm = 1; imx->chip.can_sleep = true; + if (data->polarity_supported) { + dev_dbg(&pdev->dev, "PWM supports output inversion\n"); + imx->chip.of_xlate = of_pwm_xlate_with_flags; + imx->chip.of_pwm_n_cells = 3; + } r = platform_get_resource(pdev, IORESOURCE_MEM, 0); imx->mmio_base = devm_ioremap_resource(&pdev->dev, r); -- 2.1.4