soc: ti: wkup_m3_ipc: Add wkup_m3_request_wake_src

Add wkup_m3_request_wake_src to allow users to get the name of
the wakeup source after a DeepSleep or Standby transition.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/soc/ti/wkup_m3_ipc.c b/drivers/soc/ti/wkup_m3_ipc.c
index b732c39e2754..6840688236b9 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,
@@ -330,6 +348,26 @@ static int wkup_m3_finish_low_power(struct wkup_m3_ipc *m3_ipc)
 }
 
 /**
+ * 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
@@ -346,6 +384,7 @@ static struct wkup_m3_ipc_ops ipc_ops = {
         .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,
 };