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[4/4] spi: spi-ath79: Set the initial state of CS0

Message ID 1429885164-28501-5-git-send-email-albeu@free.fr (mailing list archive)
State Accepted
Commit 83f0f398a0a64a6e94dccb5a812c67648cedef29
Headers show

Commit Message

Alban Bedel April 24, 2015, 2:19 p.m. UTC 
The internal chip select CS0 wasn't initialized properly to work with
CS HIGH chips.

Signed-off-by: Alban Bedel <albeu@free.fr>
---
 drivers/spi/spi-ath79.c | 8 ++++++++
 1 file changed, 8 insertions(+)
diff mbox

Patch

diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c
index b37bedd..bf1f9b3 100644
--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -115,6 +115,7 @@  static void ath79_spi_disable(struct ath79_spi *sp)
 
 static int ath79_spi_setup_cs(struct spi_device *spi)
 {
+	struct ath79_spi *sp = ath79_spidev_to_sp(spi);
 	int status;
 
 	if (spi->chip_select && !gpio_is_valid(spi->cs_gpio))
@@ -132,6 +133,13 @@  static int ath79_spi_setup_cs(struct spi_device *spi)
 
 		status = gpio_request_one(spi->cs_gpio, flags,
 					  dev_name(&spi->dev));
+	} else {
+		if (spi->mode & SPI_CS_HIGH)
+			sp->ioc_base &= ~AR71XX_SPI_IOC_CS0;
+		else
+			sp->ioc_base |= AR71XX_SPI_IOC_CS0;
+
+		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);
 	}
 
 	return status;