diff mbox series

[11/15] spi: img-spfi: Set device select bits for SPFI port state

Message ID 20180722212010.3979-12-afaerber@suse.de (mailing list archive)
State Accepted
Commit baec8eb323cd59d1bfe148a287610819d5897838
Headers show
Series MIPS: pistachio: Creator Ci40 aka Marduk SPI-UART | expand

Commit Message

Andreas Färber July 22, 2018, 9:20 p.m. UTC 
From: Ionela Voinescu <ionela.voinescu@imgtec.com>

Even if the chip select line is not controlled by the SPFI
hardware, the device select bits need to be set to specify
the chip select line in use for the hardware to know what
parameters to use for the current transfer.

Signed-off-by: Ionela Voinescu <ionela.voinescu@imgtec.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 drivers/spi/spi-img-spfi.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c
index c845a505bae6..0d73d31a6a2b 100644
--- a/drivers/spi/spi-img-spfi.c
+++ b/drivers/spi/spi-img-spfi.c
@@ -438,6 +438,9 @@  static int img_spfi_prepare(struct spi_master *master, struct spi_message *msg)
 	u32 val;
 
 	val = spfi_readl(spfi, SPFI_PORT_STATE);
+	val &= ~(SPFI_PORT_STATE_DEV_SEL_MASK <<
+		 SPFI_PORT_STATE_DEV_SEL_SHIFT);
+	val |= msg->spi->chip_select << SPFI_PORT_STATE_DEV_SEL_SHIFT;
 	if (msg->spi->mode & SPI_CPHA)
 		val |= SPFI_PORT_STATE_CK_PHASE(msg->spi->chip_select);
 	else