[+cc Geert, Kevin, Simon]
On Mon, Nov 14, 2016 at 11:15:53AM +0000, Srinivas Kandagatla wrote:
> This patch adds support to pm clocks via device tree, so that the clocks
> can be turned on and off during runtime pm. This patch is required for
> Qualcomm msm8996 pcie controller which sits on a bus with its own
> power-domain and clocks.
>
> Without this patch the clock associated with the bus are never turned on.
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
I don't see a formal maintainer for drivers/bus/simple-pm-bus.c, but I'd
like an ack or at least a review from Geert or Simon.
> ---
> drivers/bus/simple-pm-bus.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c
> index c5eb46c..63b7e8c 100644
> --- a/drivers/bus/simple-pm-bus.c
> +++ b/drivers/bus/simple-pm-bus.c
> @@ -11,6 +11,7 @@
> #include <linux/module.h>
> #include <linux/of_platform.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_clock.h>
> #include <linux/pm_runtime.h>
>
>
> @@ -22,17 +23,26 @@ static int simple_pm_bus_probe(struct platform_device *pdev)
>
> pm_runtime_enable(&pdev->dev);
>
> - if (np)
> + if (np) {
> + of_pm_clk_add_clks(&pdev->dev);
> of_platform_populate(np, NULL, NULL, &pdev->dev);
> + }
>
> return 0;
> }
>
> +static const struct dev_pm_ops simple_pm_bus_pm_ops = {
> + SET_RUNTIME_PM_OPS(pm_clk_suspend,
> + pm_clk_resume, NULL)
> +};
> +
> static int simple_pm_bus_remove(struct platform_device *pdev)
> {
> dev_dbg(&pdev->dev, "%s\n", __func__);
>
> pm_runtime_disable(&pdev->dev);
> + pm_clk_destroy(&pdev->dev);
> +
> return 0;
> }
>
> @@ -48,6 +58,7 @@ static struct platform_driver simple_pm_bus_driver = {
> .driver = {
> .name = "simple-pm-bus",
> .of_match_table = simple_pm_bus_of_match,
> + .pm = &simple_pm_bus_pm_ops,
> },
> };
>
> --
> 2.10.1
>
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