input: touchscreen: sec: Read touch_offload device_id from DT.

Bug: 174189879
Test: Verified device_id with locally built ROM.
Signed-off-by: Mark Chang <changmark@google.com>
Change-Id: Iec8037c750274121fb39c9c963cf46d8f6b80b95

2 files changed, 16 insertions, 3 deletions

diff --git a/sec_ts.c b/sec_ts.c
index cf901ec..5f4ce12 100644
--- a/sec_ts.c
+++ b/sec_ts.c
@@ -3021,6 +3021,7 @@ static int sec_ts_parse_dt(struct spi_device *client)
 	struct sec_ts_plat_data *pdata = dev->platform_data;
 	struct device_node *np = dev->of_node;
 	u32 coords[2];
+	u8 offload_id[4];
 	int ret = 0;
 	int count = 0;
 	u32 ic_match_value;
@@ -3281,6 +3282,19 @@ static int sec_ts_parse_dt(struct spi_device *client)
 
 	pdata->support_mt_pressure = true;
 
+	pdata->offload_id = 0;
+	if (of_property_read_u8_array(np, "sec,touch_offload_id",
+				      offload_id, 4) == -EINVAL)
+		input_err(true, &client->dev,
+			  "%s: Failed to read sec,touch_offload_id\n");
+	else {
+		pdata->offload_id = *(u32 *)offload_id;
+		input_info(true, &client->dev,
+			   "%s: Offload device ID = \"%c%c%c%c\" / 0x%08X\n",
+			   __func__, offload_id[0], offload_id[1], offload_id[2],
+			   offload_id[3], pdata->offload_id);
+	}
+
 	if (of_property_read_u8(np, "sec,mm2px", &pdata->mm2px) < 0)
 		pdata->mm2px = 1;
 	input_info(true, &client->dev,
@@ -3973,9 +3987,7 @@ static int sec_ts_probe(struct spi_device *client)
 #if IS_ENABLED(CONFIG_TOUCHSCREEN_OFFLOAD)
 	ts->offload.caps.touch_offload_major_version = 1;
 	ts->offload.caps.touch_offload_minor_version = 0;
-	/* ID equivalent to the 4-byte, little-endian string: '00r3' */
-	ts->offload.caps.device_id =
-	    '3' << 24 | 'r' << 16 | '0' << 8 | '0' << 0;
+	ts->offload.caps.device_id = ts->plat_data->offload_id;
 	ts->offload.caps.display_width = ts->plat_data->max_x + 1;
 	ts->offload.caps.display_height = ts->plat_data->max_y + 1;
 	ts->offload.caps.tx_size = ts->tx_count;
diff --git a/sec_ts.h b/sec_ts.h
index 46afaaa..5a4ec78 100644
--- a/sec_ts.h
+++ b/sec_ts.h
@@ -1139,6 +1139,7 @@ struct sec_ts_plat_data {
 
 	struct drm_panel *panel;
 	u32 initial_panel_index;
+	u32 offload_id;
 
 	/* convert mm to pixel for major and minor */
 	u8 mm2px;