From 83f0f398a0a64a6e94dccb5a812c67648cedef29 Mon Sep 17 00:00:00 2001 From: Alban Bedel Date: Fri, 24 Apr 2015 16:19:24 +0200 Subject: [PATCH] spi: spi-ath79: Set the initial state of CS0 The internal chip select CS0 wasn't initialized properly to work with CS HIGH chips. Signed-off-by: Alban Bedel Signed-off-by: Mark Brown --- drivers/spi/spi-ath79.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c index b37bedd059b3..bf1f9b32c597 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; -- 2.20.1