linux-kernel - [PATCH] spi: gpio: Advertise support for SPI_CS

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Date:   Sun, 10 Feb 2019 18:10:08 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     linux-spi@...r.kernel.org
Cc:     Jonathan Neuschäfer <j.neuschaefer@....net>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] spi: gpio: Advertise support for SPI_CS_HIGH

The spi-gpio driver already handles different chip select polarities,
but so far this was not advertised in master->mode_bits.

This patch fixes mmc_spi on top of spi_gpio, which is useful in some
testing scenarios.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@....net>
---
 drivers/spi/spi-gpio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
index a4aee26028cd..3e98c1a0ba6d 100644
--- a/drivers/spi/spi-gpio.c
+++ b/drivers/spi/spi-gpio.c
@@ -428,7 +428,8 @@ static int spi_gpio_probe(struct platform_device *pdev)
 		return status;
 
 	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->bus_num = pdev->id;
 	/* The master needs to think there is a chipselect even if not connected */
-- 
2.20.1