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| author |   Alban Bedel <albeu@free.fr> | 2015-04-24 16:19:24 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2015-04-27 15:44:57 +0100 |
| commit | 83f0f398a0a64a6e94dccb5a812c67648cedef29 (patch) | |
| tree | f3c4e1c217603e174c8b978dacaeefcd27ada7ab /drivers/spi/spi-ath79.c | |
| parent | spi: spi-ath79: Use clk_prepare_enable and clk_disable_unprepare (diff) | |
| download | linux-dev-83f0f398a0a64a6e94dccb5a812c67648cedef29.tar.xz linux-dev-83f0f398a0a64a6e94dccb5a812c67648cedef29.zip | |
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 <albeu@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-ath79.c')
| -rw-r--r-- | drivers/spi/spi-ath79.c | 8 |
1 files changed, 8 insertions, 0 deletions
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; |