[PATCH 2/3] spi: spidev: Add an entry for lwn,bk4-spi

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <festevam@denx.de>

Currently, the compatible string used for Liebherr's BK4 external SPI
controller device is "lwn,bk4", which is the same as the board compatible
string documented at fsl.yaml.

This causes several dt-schema warnings:

make dtbs_check DT_SCHEMA_FILES=fsl.yaml
...

['lwn,bk4'] is too short
'lwn,bk4' is not one of ['tq,imx8dxp-tqma8xdp-mba8xx']
'lwn,bk4' is not one of ['tq,imx8qxp-tqma8xqp-mba8xx']
'lwn,bk4' is not one of ['armadeus,imx1-apf9328', 'fsl,imx1ads']
...

Add a more specific "lwn,bk4-spi" compatible string entry for this
device to fix the problem.

The original "lwn,bk4" is kept to keep compatibility with old DTBs.

Signed-off-by: Fabio Estevam <festevam@denx.de>
---
 drivers/spi/spidev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index 653f82984216..2b87b9ae56c0 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -705,6 +705,7 @@ static const struct spi_device_id spidev_spi_ids[] = {
 	{ .name = "ltc2488" },
 	{ .name = "sx1301" },
 	{ .name = "bk4" },
+	{ .name = "bk4-spi" },
 	{ .name = "dhcom-board" },
 	{ .name = "m53cpld" },
 	{ .name = "spi-petra" },
@@ -734,6 +735,7 @@ static const struct of_device_id spidev_dt_ids[] = {
 	{ .compatible = "elgin,jg10309-01", .data = &spidev_of_check },
 	{ .compatible = "lineartechnology,ltc2488", .data = &spidev_of_check },
 	{ .compatible = "lwn,bk4", .data = &spidev_of_check },
+	{ .compatible = "lwn,bk4-spi", .data = &spidev_of_check },
 	{ .compatible = "menlo,m53cpld", .data = &spidev_of_check },
 	{ .compatible = "micron,spi-authenta", .data = &spidev_of_check },
 	{ .compatible = "rohm,bh2228fv", .data = &spidev_of_check },
-- 
2.34.1