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SubjectRe: [PATCHv3 3/3] pwm: imx: support output polarity inversion
Hi Lothar,

On Fri, Mar 28, 2014 at 09:49:00AM +0100, Lothar Waßmann wrote:
> static struct pwm_ops imx_pwm_ops = {
> .enable = imx_pwm_enable,
> .disable = imx_pwm_disable,
> @@ -210,6 +228,7 @@ struct imx_pwm_data {
> int (*config)(struct pwm_chip *chip,
> struct pwm_device *pwm, int duty_ns, int period_ns);
> void (*set_enable)(struct pwm_chip *chip, bool enable);
> + unsigned output_polarity:1;
> };
>
> static struct imx_pwm_data imx_pwm_data_v1 = {
> @@ -220,6 +239,7 @@ static struct imx_pwm_data imx_pwm_data_v1 = {
> static struct imx_pwm_data imx_pwm_data_v2 = {
> .config = imx_pwm_config_v2,
> .set_enable = imx_pwm_set_enable_v2,
> + .output_polarity = 1,
> };
>
> static const struct of_device_id imx_pwm_dt_ids[] = {
> @@ -272,6 +292,11 @@ static int imx_pwm_probe(struct platform_device *pdev)
> return PTR_ERR(imx->mmio_base);
>
> data = of_id->data;
> + if (data->output_polarity) {
> + dev_dbg(&pdev->dev, "PWM supports output inversion\n");
> + imx_pwm_ops.set_polarity = imx_pwm_set_polarity;
> + }

You shouldn't modify imx_pwm_ops in the probe function, it's not good
style and prevents us from making the ops const.

Sascha

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