2017-03-04 18:37:50 +00:00
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From c0aaf0d4213bfc9df85c397cd974f7a6f15255f2 Mon Sep 17 00:00:00 2001
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2017-02-07 20:07:54 +00:00
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Fri, 1 Jul 2016 22:09:24 +0100
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Subject: [PATCH] spi-bcm2835: Disable forced software CS
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Select software CS in bcm2708_common.dtsi, and disable the automatic
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conversion in the driver to allow hardware CS to be re-enabled with an
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overlay.
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See: https://github.com/raspberrypi/linux/issues/1547
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/spi/spi-bcm2835.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/spi/spi-bcm2835.c
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+++ b/drivers/spi/spi-bcm2835.c
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@@ -707,6 +707,7 @@ static int bcm2835_spi_setup(struct spi_
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return -EINVAL;
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}
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+#if 0
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/* now translate native cs to GPIO */
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/* first look for chip select pins in the devices pin groups */
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for (pingroup_index = 0;
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@@ -756,6 +757,7 @@ static int bcm2835_spi_setup(struct spi_
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spi->chip_select, spi->cs_gpio, err);
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return err;
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}
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+#endif
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return 0;
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}
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