Unverified Commit cf066818 authored by Kuninori Morimoto's avatar Kuninori Morimoto Committed by Mark Brown
Browse files

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



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: default avatarKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/87wmbi2x0g.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent c4887bd4

drivers/spi/spi-sh-msiof.c

+6 −0
Original line number Diff line number Diff line
@@ -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);