[PATCH] spi: dw: allow providing own set_cs callback

From: Alexandre Belloni
Date: Tue Jul 17 2018 - 10:23:11 EST


Allow platform specific drivers to provide their own set_cs callback when
the IP integration requires it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
drivers/spi/spi-dw.c | 3 +++
drivers/spi/spi-dw.h | 1 +
2 files changed, 4 insertions(+)

diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index f693bfe95ab9..0d8ccb8be5ec 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -505,6 +505,9 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
master->dev.of_node = dev->of_node;
master->flags = SPI_MASTER_GPIO_SS;

+ if (dws->set_cs)
+ master->set_cs = dws->set_cs;
+
/* Basic HW init */
spi_hw_init(dev, dws);

diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 2cde2473b3e9..446013022849 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -112,6 +112,7 @@ struct dw_spi {
u32 reg_io_width; /* DR I/O width in bytes */
u16 bus_num;
u16 num_cs; /* supported slave numbers */
+ void (*set_cs)(struct spi_device *spi, bool enable);

/* Current message transfer state info */
size_t len;
--
2.18.0