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path: root/drivers/soc/ti/wkup_m3_ipc.c
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Diffstat (limited to 'drivers/soc/ti/wkup_m3_ipc.c')
-rw-r--r--drivers/soc/ti/wkup_m3_ipc.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c
index 369aef5e7228..f5cb8c0af09f 100644
--- a/drivers/soc/ti/wkup_m3_ipc.c
+++ b/drivers/soc/ti/wkup_m3_ipc.c
@@ -46,6 +46,7 @@
#define M3_BASELINE_VERSION 0x191
#define M3_STATUS_RESP_MASK (0xffff << 16)
#define M3_FW_VERSION_MASK 0xffff
+#define M3_WAKE_SRC_MASK 0xff
#define M3_STATE_UNKNOWN 0
#define M3_STATE_RESET 1
@@ -55,6 +56,23 @@
static struct wkup_m3_ipc *m3_ipc_state;
+static const struct wkup_m3_wakeup_src wakeups[] = {
+ {.irq_nr = 35, .src = "USB0_PHY"},
+ {.irq_nr = 36, .src = "USB1_PHY"},
+ {.irq_nr = 40, .src = "I2C0"},
+ {.irq_nr = 41, .src = "RTC Timer"},
+ {.irq_nr = 42, .src = "RTC Alarm"},
+ {.irq_nr = 43, .src = "Timer0"},
+ {.irq_nr = 44, .src = "Timer1"},
+ {.irq_nr = 45, .src = "UART"},
+ {.irq_nr = 46, .src = "GPIO0"},
+ {.irq_nr = 48, .src = "MPU_WAKE"},
+ {.irq_nr = 49, .src = "WDT0"},
+ {.irq_nr = 50, .src = "WDT1"},
+ {.irq_nr = 51, .src = "ADC_TSC"},
+ {.irq_nr = 0, .src = "Unknown"},
+};
+
static void am33xx_txev_eoi(struct wkup_m3_ipc *m3_ipc)
{
writel(AM33XX_M3_TXEV_ACK,
@@ -329,12 +347,45 @@ static int wkup_m3_finish_low_power(struct wkup_m3_ipc *m3_ipc)
return 0;
}
+/**
+ * wkup_m3_request_wake_src - Get the wakeup source info passed from wkup_m3
+ * @m3_ipc: Pointer to wkup_m3_ipc context
+ */
+static const char *wkup_m3_request_wake_src(struct wkup_m3_ipc *m3_ipc)
+{
+ unsigned int wakeup_src_idx;
+ int j, val;
+
+ val = wkup_m3_ctrl_ipc_read(m3_ipc, 6);
+
+ wakeup_src_idx = val & M3_WAKE_SRC_MASK;
+
+ for (j = 0; j < ARRAY_SIZE(wakeups) - 1; j++) {
+ if (wakeups[j].irq_nr == wakeup_src_idx)
+ return wakeups[j].src;
+ }
+ return wakeups[j].src;
+}
+
+/**
+ * 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,
+ .request_wake_src = wkup_m3_request_wake_src,
+ .set_rtc_only = wkup_m3_set_rtc_only,
};
/**
@@ -484,6 +535,30 @@ static int wkup_m3_ipc_remove(struct platform_device *pdev)
return 0;
}
+static int __maybe_unused wkup_m3_ipc_suspend(struct device *dev)
+{
+ /*
+ * Nothing needs to be done on suspend even with rtc_only flag set
+ */
+ return 0;
+}
+
+static int __maybe_unused 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)
+};
+
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 +572,7 @@ static struct platform_driver wkup_m3_ipc_driver = {
.driver = {
.name = "wkup_m3_ipc",
.of_match_table = wkup_m3_ipc_of_match,
+ .pm = &wkup_m3_ipc_pm_ops,
},
};