@@ -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)
@@ -234,6 +235,9 @@ 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. */
@@ -258,6 +262,7 @@ static struct pwm_ops imx_pwm_ops_v2 = {
};
struct imx_pwm_data {
+ bool polarity_supported;
struct pwm_ops *pwm_ops;
};
@@ -266,6 +271,7 @@ 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,
};
@@ -313,6 +319,11 @@ 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);