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authorKeerthy <j-keerthy@ti.com>2018-07-05 06:19:06 +0300
committerSantosh Shilimkar <santosh.shilimkar@oracle.com>2018-07-05 06:19:06 +0300
commit7a872b6fb7fdc4213e9bb4e1c83a65e6b8af7ebd (patch)
treec4cad2c81d10540c13b5c9f547635c8cd22d09d5 /drivers/soc/ti/wkup_m3_ipc.c
parent38853979e6dce8466a1f611cadebc0f00adb901b (diff)
downloadlinux-7a872b6fb7fdc4213e9bb4e1c83a65e6b8af7ebd.tar.xz
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>
Diffstat (limited to 'drivers/soc/ti/wkup_m3_ipc.c')
-rw-r--r--drivers/soc/ti/wkup_m3_ipc.c41
1 files changed, 41 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
},
};