soc: swr-mstr: Fix headset detect issue during clk stop wakeup

When ext clk stop wakeup and slave_pending_irq come together
then interrupt at swrslave is cleared due to calling
enable_slave_irq. Do not clear interrupts for enable_slave_irq
when its called from clk stop wakeup.

Change-Id: Ia710030ab80306d6750bea7264f0d4c07053d701
Signed-off-by: Vatsal Bucha <[email protected]>

soc/swr-mstr-ctrl.c

@@ -1991,10 +1991,12 @@ static void swrm_enable_slave_irq(struct swr_mstr_ctrl *swrm)
 	dev_dbg(swrm->dev, "%s: slave status: 0x%x\n", __func__, status);
 	for (i = 0; i < (swrm->num_dev + 1); i++) {
 		if (status & SWRM_MCP_SLV_STATUS_MASK) {
-			swrm_cmd_fifo_rd_cmd(swrm, &temp, i, 0x0,
+			if (!swrm->clk_stop_wakeup) {
+				swrm_cmd_fifo_rd_cmd(swrm, &temp, i, 0x0,
 					SWRS_SCP_INT_STATUS_CLEAR_1, 1);
-			swrm_cmd_fifo_wr_cmd(swrm, 0xFF, i, 0x0,
+				swrm_cmd_fifo_wr_cmd(swrm, 0xFF, i, 0x0,
 					SWRS_SCP_INT_STATUS_CLEAR_1);
+			}
 			swrm_cmd_fifo_wr_cmd(swrm, 0x4, i, 0x0,
 					SWRS_SCP_INT_STATUS_MASK_1);
 		}
@@ -2243,7 +2245,9 @@ handle_irq:
 				 * re-enable Host IRQ and process slave pending
 				 * interrupts, if any.
 				 */
+				swrm->clk_stop_wakeup = true;
 				swrm_enable_slave_irq(swrm);
+				swrm->clk_stop_wakeup = false;
 			}
 			break;
 		default:
@@ -2864,6 +2868,8 @@ static int swrm_probe(struct platform_device *pdev)
 	swrm->dev_up = true;
 	swrm->state = SWR_MSTR_UP;
 	swrm->ipc_wakeup = false;
+	swrm->enable_slave_irq = false;
+	swrm->clk_stop_wakeup = false;
 	swrm->ipc_wakeup_triggered = false;
 	swrm->disable_div2_clk_switch = FALSE;
 	init_completion(&swrm->reset);

soc/swr-mstr-ctrl.h

@@ -200,6 +200,7 @@ struct swr_mstr_ctrl {
 	u32 num_auto_enum;
 	bool enable_slave_irq;
 	u32 is_always_on;
+	bool clk_stop_wakeup;
 	struct swr_port_params pp[SWR_UC_MAX][SWR_MAX_MSTR_PORT_NUM];/*max_devNum * max_ports 11 * 14 */
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *debugfs_swrm_dent;