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| author | Keerthy <j-keerthy@ti.com> | 2018-07-05 05:19:06 +0200 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@oracle.com> | 2018-07-05 05:19:06 +0200 |
| commit | 7a872b6fb7fdc4213e9bb4e1c83a65e6b8af7ebd (patch) | |
| tree | c4cad2c81d10540c13b5c9f547635c8cd22d09d5 | |
| parent | memory: ti-emif-sram: Add resume function to recopy sram code (diff) | |
| download | linux-7a872b6fb7fdc4213e9bb4e1c83a65e6b8af7ebd.tar.xz linux-7a872b6fb7fdc4213e9bb4e1c83a65e6b8af7ebd.zip | |
soc: ti: wkup_m3_ipc: Add rtc_only with ddr in self refresh mode support
Adds rtc_only support. This needs resume function to shutdown and
reboot the m3.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
| -rw-r--r-- | drivers/soc/ti/wkup_m3_ipc.c | 41 | ||||
| -rw-r--r-- | include/linux/wkup_m3_ipc.h | 3 |
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c index 369aef5e7228..b732c39e2754 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 struct platform_driver wkup_m3_ipc_driver = { .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 d6ba7d39a62f..d639df15e8ba 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 */ |