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spi: sh-msiof: ignore driver probing if it was MSIOF Sound

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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@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/87wmbi2x0g.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kuninori Morimoto
2025-04-17 23:23:12 +00:00
committed by Mark Brown
parent c4887bd4b3
commit cf0668184d
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/spi-sh-msiof.c
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@@ -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>
@@ -1281,6 +1282,11 @@ static int sh_msiof_spi_probe(struct platform_device *pdev)
int i;
int ret;
/* Check whether MSIOF is used as I2S mode or SPI mode by checking "port" node */
struct device_node *port __free(device_node) = of_graph_get_next_port(dev->of_node, NULL);
if (port) /* It was MSIOF-I2S */
return -ENODEV;
chipdata = of_device_get_match_data(dev);
if (chipdata) {
info = sh_msiof_spi_parse_dt(dev);