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69 lines
2.1 KiB
Diff
69 lines
2.1 KiB
Diff
From: Adrian Schmutzler <freifunk@adrianschmutzler.de>
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Date: Fri, 03 Apr 2020 19:50:03 +0200
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Subject: add removed helper syscon_regmap_lookup_by_pdevname
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The helper syscon_regmap_lookup_by_pdevname has been removed in 29d14b668d2f
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("mfd: Remove unused helper syscon_regmap_lookup_by_pdevname") due to lack
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of users.
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Thus, we have to maintain it locally.
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This patch includes a fix due to changes in driver_find_device;
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kernel commit: 92ce7e83b4e5 ("driver_find_device: Unify the match function
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with class_find_device()")
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Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
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--- a/drivers/mfd/syscon.c
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+++ b/drivers/mfd/syscon.c
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@@ -204,6 +204,27 @@ struct regmap *syscon_regmap_lookup_by_c
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}
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EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_compatible);
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+static int syscon_match_pdevname(struct device *dev, const void *data)
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+{
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+ return !strcmp(dev_name(dev), (const char *)data);
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+}
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+
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+struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
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+{
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+ struct device *dev;
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+ struct syscon *syscon;
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+
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+ dev = driver_find_device(&syscon_driver.driver, NULL, (void *)s,
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+ syscon_match_pdevname);
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+ if (!dev)
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+ return ERR_PTR(-EPROBE_DEFER);
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+
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+ syscon = dev_get_drvdata(dev);
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+
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+ return syscon->regmap;
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+}
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+EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_pdevname);
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+
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struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
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const char *property)
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{
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--- a/include/linux/mfd/syscon.h
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+++ b/include/linux/mfd/syscon.h
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@@ -20,6 +20,7 @@ struct device_node;
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extern struct regmap *device_node_to_regmap(struct device_node *np);
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extern struct regmap *syscon_node_to_regmap(struct device_node *np);
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extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
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+extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
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extern struct regmap *syscon_regmap_lookup_by_phandle(
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struct device_node *np,
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const char *property);
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@@ -38,6 +39,11 @@ static inline struct regmap *syscon_regm
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{
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return ERR_PTR(-ENOTSUPP);
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}
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+
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+static inline struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
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+{
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+ return ERR_PTR(-ENOTSUPP);
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+}
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static inline struct regmap *syscon_regmap_lookup_by_phandle(
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struct device_node *np,
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