lkml.org 
[lkml]   [2014]   [Jan]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 2/2] pwm: imx: support polarity inversion
Date
On Monday 13 January 2014 11:29:48 Lothar Waßmann wrote:

> diff --git a/arch/arm/boot/dts/imx50.dtsi b/arch/arm/boot/dts/imx50.dtsi
> index 01c0499..e3647a8 100644
> --- a/arch/arm/boot/dts/imx50.dtsi
> +++ b/arch/arm/boot/dts/imx50.dtsi
> @@ -273,7 +273,7 @@
> };
>
> pwm1: pwm@53fb4000 {
> - #pwm-cells = <2>;
> + #pwm-cells = <3>;
> compatible = "fsl,imx50-pwm", "fsl,imx27-pwm";
> reg = <0x53fb4000 0x4000>;
> clocks = <&clks IMX5_CLK_PWM1_IPG_GATE>,
...
> @@ -271,6 +293,13 @@ static int imx_pwm_probe(struct platform_device *pdev)
> return PTR_ERR(imx->mmio_base);
>
> data = of_id->data;
> + if (data->output_polarity) {
> + dev_info(&pdev->dev, "PWM supports inversion\n");
> + imx_pwm_ops.set_polarity = imx_pwm_set_polarity;
> + imx->chip.of_xlate = of_pwm_xlate_with_flags;
> + imx->chip.of_pwm_n_cells = 3;
> + }
> +
> imx->config = data->config;
> imx->set_enable = data->set_enable;

This looks like you are breaking compatibility with the binding,
which requires #pwm-cells to be <2>. You can extend the binding
to allow both <2> and <3>, but then you have to not only document
that change in the binding, but also ensure that the pwm driver
is able to use either variant.

Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2014-01-13 13:01    [W:0.660 / U:1.376 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site