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38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
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From: Shiji Yang <yangshiji66@outlook.com>
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Date: Wed, 13 Mar 2024 22:36:31 +0800
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Subject: [PATCH] mfd: syscon: support skip reset control for syscon devices
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Some platform device drivers(e.g. ag71xx) expect exclusive reset
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control. Fetching reset controller for syscon[1] will break these
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drivers. This patch introduces a new property 'syscon-no-reset'
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to skip it.
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[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit?id=7d1e3bd94828ad9fc86f55253cd6fec8edd65394
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Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
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---
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drivers/mfd/syscon.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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--- a/drivers/mfd/syscon.c
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+++ b/drivers/mfd/syscon.c
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@@ -52,7 +52,7 @@ static struct syscon *of_syscon_register
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int ret;
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struct regmap_config syscon_config = syscon_regmap_config;
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struct resource res;
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- struct reset_control *reset;
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+ struct reset_control *reset = NULL;
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syscon = kzalloc(sizeof(*syscon), GFP_KERNEL);
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if (!syscon)
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@@ -134,7 +134,8 @@ static struct syscon *of_syscon_register
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goto err_attach_clk;
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}
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- reset = of_reset_control_get_optional_exclusive(np, NULL);
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+ if (!of_property_read_bool(np, "syscon-no-reset"))
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+ reset = of_reset_control_get_optional_exclusive(np, NULL);
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if (IS_ERR(reset)) {
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ret = PTR_ERR(reset);
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goto err_attach_clk;
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