On Thursday 21 June 2018 02:52 PM, Keerthy wrote:
> Adds rtc_only support. This needs resume function to shutdown and
> reboot the m3.
A gentle ping on this series.
>
> Signed-off-by: Keerthy <j-keerthy@xxxxxx>
> ---
>
> This is tested on am437x-gp-evm and target for 4.19
>
> drivers/soc/ti/wkup_m3_ipc.c | 41 +++++++++++++++++++++++++++++++++++++++++
> include/linux/wkup_m3_ipc.h | 3 +++
> 2 files changed, 44 insertions(+)
>
> diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c
> index 369aef5..b732c39 100644
> --- a/drivers/soc/ti/wkup_m3_ipc.c
> +++ b/drivers/soc/ti/wkup_m3_ipc.c
> @@ -329,12 +329,24 @@ static int wkup_m3_finish_low_power(struct wkup_m3_ipc *m3_ipc)
> return 0;
> }
>
> +/**
> + * wkup_m3_set_rtc_only - Set the rtc_only flag
> + * @wkup_m3_wakeup: struct wkup_m3_wakeup_src * gets assigned the
> + * wakeup src value
> + */
> +static void wkup_m3_set_rtc_only(struct wkup_m3_ipc *m3_ipc)
> +{
> + if (m3_ipc_state)
> + m3_ipc_state->is_rtc_only = true;
> +}
> +
> static struct wkup_m3_ipc_ops ipc_ops = {
> .set_mem_type = wkup_m3_set_mem_type,
> .set_resume_address = wkup_m3_set_resume_address,
> .prepare_low_power = wkup_m3_prepare_low_power,
> .finish_low_power = wkup_m3_finish_low_power,
> .request_pm_status = wkup_m3_request_pm_status,
> + .set_rtc_only = wkup_m3_set_rtc_only,
> };
>
> /**
> @@ -484,6 +496,32 @@ static int wkup_m3_ipc_remove(struct platform_device *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_PM
> +static int wkup_m3_ipc_suspend(struct device *dev)
> +{
> + /*
> + * Nothing needs to be done on suspend even with rtc_only flag set
> + */
> + return 0;
> +}
> +
> +static int wkup_m3_ipc_resume(struct device *dev)
> +{
> + if (m3_ipc_state->is_rtc_only) {
> + rproc_shutdown(m3_ipc_state->rproc);
> + rproc_boot(m3_ipc_state->rproc);
> + }
> +
> + m3_ipc_state->is_rtc_only = false;
> +
> + return 0;
> +}
> +
> +static const struct dev_pm_ops wkup_m3_ipc_pm_ops = {
> + SET_SYSTEM_SLEEP_PM_OPS(wkup_m3_ipc_suspend, wkup_m3_ipc_resume)
> +};
> +#endif
> +
> static const struct of_device_id wkup_m3_ipc_of_match[] = {
> { .compatible = "ti,am3352-wkup-m3-ipc", },
> { .compatible = "ti,am4372-wkup-m3-ipc", },
> @@ -497,6 +535,9 @@ static int wkup_m3_ipc_remove(struct platform_device *pdev)
> .driver = {
> .name = "wkup_m3_ipc",
> .of_match_table = wkup_m3_ipc_of_match,
> +#ifdef CONFIG_PM
> + .pm = &wkup_m3_ipc_pm_ops,
> +#endif
> },
> };
>
> diff --git a/include/linux/wkup_m3_ipc.h b/include/linux/wkup_m3_ipc.h
> index d6ba7d3..d639df1 100644
> --- a/include/linux/wkup_m3_ipc.h
> +++ b/include/linux/wkup_m3_ipc.h
> @@ -40,6 +40,7 @@ struct wkup_m3_ipc {
> struct mbox_chan *mbox;
>
> struct wkup_m3_ipc_ops *ops;
> + int is_rtc_only;
> };
>
> struct wkup_m3_ipc_ops {
> @@ -48,8 +49,10 @@ struct wkup_m3_ipc_ops {
> int (*prepare_low_power)(struct wkup_m3_ipc *m3_ipc, int state);
> int (*finish_low_power)(struct wkup_m3_ipc *m3_ipc);
> int (*request_pm_status)(struct wkup_m3_ipc *m3_ipc);
> + void (*set_rtc_only)(struct wkup_m3_ipc *m3_ipc);
> };
>
> struct wkup_m3_ipc *wkup_m3_ipc_get(void);
> void wkup_m3_ipc_put(struct wkup_m3_ipc *m3_ipc);
> +void wkup_m3_set_rtc_only_mode(void);
> #endif /* _LINUX_WKUP_M3_IPC_H */
>
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