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spi: spi-gpio: fix SPI_CS_HIGH capability 

spi-gpio is capable of dealing with active-high chip-selects.
Unfortunately, commit 4b859db2c6 ("spi: spi-gpio: add SPI_3WIRE
support") broke this by setting master->mode_bits, which overrides
the setting in the spi-bitbang code.  Fix this.

[Fixed a trivial conflict with SPI_3WIRE_HIZ support -- broonie]

Fixes: 4b859db2c6 ("spi: spi-gpio: add SPI_3WIRE support")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Russell King 2019-02-21 15:59:58 +00:00 committed by Mark Brown
parent ef070b4e4a
commit b89fefda7d
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-gpio.c
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@ -428,7 +428,8 @@ static int spi_gpio_probe(struct platform_device *pdev)
return status; return status;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32);
master->mode_bits = SPI_3WIRE | SPI_3WIRE_HIZ | SPI_CPHA | SPI_CPOL; master->mode_bits = SPI_3WIRE | SPI_3WIRE_HIZ | SPI_CPHA | SPI_CPOL |
SPI_CS_HIGH;
master->flags = master_flags; master->flags = master_flags;
master->bus_num = pdev->id; master->bus_num = pdev->id;
/* The master needs to think there is a chipselect even if not connected */ /* The master needs to think there is a chipselect even if not connected */
@ -455,7 +456,6 @@ static int spi_gpio_probe(struct platform_device *pdev)
spi_gpio->bitbang.txrx_word[SPI_MODE_3] = spi_gpio_spec_txrx_word_mode3; spi_gpio->bitbang.txrx_word[SPI_MODE_3] = spi_gpio_spec_txrx_word_mode3;
} }
spi_gpio->bitbang.setup_transfer = spi_bitbang_setup_transfer; spi_gpio->bitbang.setup_transfer = spi_bitbang_setup_transfer;
spi_gpio->bitbang.flags = SPI_CS_HIGH;
status = spi_bitbang_start(&spi_gpio->bitbang); status = spi_bitbang_start(&spi_gpio->bitbang);
if (status) if (status)