8f9e91ad03
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
28 lines
1,017 B
Diff
28 lines
1,017 B
Diff
From 4f636d7bd30a55b7f5096785203b79ee08c64d25 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Mon, 13 May 2024 15:40:02 +0100
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Subject: [PATCH] spi: dw: Handle any number of gpiod CS lines
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Even when configured to use only gpiod CS lines, the DW SPI controller
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still expects a bit to be set in the SER register, otherwise transfers
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stall. For the csgpiod case, nominate bit 0 for the job.
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See: https://github.com/raspberrypi/linux/issues/6159
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/spi/spi-dw-core.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/spi/spi-dw-core.c
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+++ b/drivers/spi/spi-dw-core.c
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@@ -100,7 +100,8 @@ void dw_spi_set_cs(struct spi_device *sp
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* support active-high or active-low CS level.
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*/
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if (cs_high == enable)
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- dw_writel(dws, DW_SPI_SER, BIT(spi_get_chipselect(spi, 0)));
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+ dw_writel(dws, DW_SPI_SER,
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+ BIT(spi_get_csgpiod(spi, 0) ? 0 : spi_get_chipselect(spi, 0)));
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else
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dw_writel(dws, DW_SPI_SER, 0);
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}
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