From 5e31ba0c0543a04483b53151eb5b7413efece94c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Martin=20Hundeb=C3=B8ll?= <martin@geanix.com>
Date: Wed, 14 Oct 2020 11:02:30 +0200
Subject: [PATCH] spi: bcm2835: fix gpio cs level inversion
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The work on improving gpio chip-select in spi core, and the following
fixes, has caused the bcm2835 spi driver to use wrong levels. Fix this
by simply removing level handling in the bcm2835 driver, and let the
core do its work.
Fixes: 3e5ec1db8bfe ("spi: Fix SPI_CS_HIGH setting when using native and GPIO CS")
Cc: <stable@vger.kernel.org>
Signed-off-by: Martin Hundebøll <martin@geanix.com>
Link: https://lore.kernel.org/r/20201014090230.2706810-1-martin@geanix.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/spi/spi-bcm2835.c | 12 ------------
1 file changed, 12 deletions(-)
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index b87116e9b4136..9b6ba94fe878a 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -1259,18 +1259,6 @@ static int bcm2835_spi_setup(struct spi_device *spi)
if (!chip)
return 0;
- /*
- * Retrieve the corresponding GPIO line used for CS.
- * The inversion semantics will be handled by the GPIO core
- * code, so we pass GPIOD_OUT_LOW for "unasserted" and
- * the correct flag for inversion semantics. The SPI_CS_HIGH
- * on spi->mode cannot be checked for polarity in this case
- * as the flag use_gpio_descriptors enforces SPI_CS_HIGH.
- */
- if (of_property_read_bool(spi->dev.of_node, "spi-cs-high"))
- lflags = GPIO_ACTIVE_HIGH;
- else
- lflags = GPIO_ACTIVE_LOW;
spi->cs_gpiod = gpiochip_request_own_desc(chip, 8 - spi->chip_select,
DRV_NAME,
lflags,
--
2.39.5