Renesas MSIOF (Clock-Synchronized Serial Interface with FIFO) can work as
both SPI and I2S. MSIOF-I2S will use Audio Graph Card/Card2 driver which
Of-Graph in DT.
MSIOF-SPI/I2S are using same DT compatible properties.
MSIOF-I2S uses Of-Graph for Audio-Graph-Card/Card2,
MSIOF-SPI doesn't use Of-Graph.
Check "port" node when driver probing
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
drivers/spi/spi-sh-msiof.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 8a98c313548e..51415131eff1 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/sh_dma.h>
@@ -1276,10 +1277,19 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
const struct sh_msiof_chipdata *chipdata;
struct sh_msiof_spi_info *info;
struct sh_msiof_spi_priv *p;
+ struct device_node *port;
unsigned long clksrc;
int i;
int ret;
+ /* Check whether MSIOF is used as I2S mode or SPI mode by checking "port" node */
+ port = of_graph_get_next_port(pdev->dev.of_node, NULL);
+ if (port) {
+ /* It was MSIOF-I2S */
+ of_node_put(port);
+ return -ENODEV;
+ }
+
chipdata = of_device_get_match_data(&pdev->dev);
if (chipdata) {
info = sh_msiof_spi_parse_dt(&pdev->dev);
--
2.43.0
