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Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.62 Manually rebased: bcm27xx/patches-6.12/950-0358-mmc-sdhci-of-dwcmshc-define-sdio-timeout-clocks.patch Removed upstreamed: backport-6.12/830-v6.18-spi-bcm63xx-fix-premature-CS-deassertion-on-RX-only-transactions.patch[1] All other patches automatically rebased. 1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.62&id=e31194bf494f6900a5f96f55ed194a00e458f8d1 Build system: x86/64 Build-tested: flogic/glinet_gl-mt6000, ramips/tplink_archer-a6-v3, x86/64-glibc Run-tested: flogic/glinet_gl-mt6000, ramips/tplink_archer-a6-v3, x86/64-glibc Signed-off-by: John Audia <therealgraysky@proton.me> Link: https://github.com/openwrt/openwrt/pull/21126 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
From: Chuanhong Guo <gch981213@gmail.com>
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Date: Thu, 19 Sep 2024 09:23:27 +0800
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Subject: [PATCH 16/20] spi: spi-mem: allow gpio cs in spi_mem_exec_op
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spi_mem_exec_op can use gpio cs, either by not asserting the native
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cs or switching the native cs pin to GPIO mode with pinctrl.
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Allow calling exec_op when GPIO CS present and control GPIO CS
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before and after calling exec_op.
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If exec_op decided to return -EOPNOTSUPP, the code will assert and
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deassert GPIO CS without clock pulsing, which should be fine on most
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SPI slaves.
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Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
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---
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drivers/spi/spi-mem.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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--- a/drivers/spi/spi-mem.c
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+++ b/drivers/spi/spi-mem.c
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@@ -384,13 +384,19 @@ int spi_mem_exec_op(struct spi_mem *mem,
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if (!spi_mem_internal_supports_op(mem, op))
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return -EOPNOTSUPP;
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- if (ctlr->mem_ops && ctlr->mem_ops->exec_op && !spi_get_csgpiod(mem->spi, 0)) {
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+ if (ctlr->mem_ops && ctlr->mem_ops->exec_op) {
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ret = spi_mem_access_start(mem);
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if (ret)
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return ret;
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+ if (spi_get_csgpiod(mem->spi, 0))
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+ gpiod_set_value_cansleep(spi_get_csgpiod(mem->spi, 0), 1);
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+
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ret = ctlr->mem_ops->exec_op(mem, op);
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+ if (spi_get_csgpiod(mem->spi, 0))
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+ gpiod_set_value_cansleep(spi_get_csgpiod(mem->spi, 0), 0);
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+
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spi_mem_access_end(mem);
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/*
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