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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/base/regmap/regmap-slimbus.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/base/regmap/regmap-slimbus.c')
-rw-r--r--drivers/base/regmap/regmap-slimbus.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap-slimbus.c b/drivers/base/regmap/regmap-slimbus.c
new file mode 100644
index 0000000000..8075db788b
--- /dev/null
+++ b/drivers/base/regmap/regmap-slimbus.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017, Linaro Ltd.
+
+#include <linux/regmap.h>
+#include <linux/slimbus.h>
+#include <linux/module.h>
+
+#include "internal.h"
+
+static int regmap_slimbus_write(void *context, const void *data, size_t count)
+{
+ struct slim_device *sdev = context;
+
+ return slim_write(sdev, *(u16 *)data, count - 2, (u8 *)data + 2);
+}
+
+static int regmap_slimbus_read(void *context, const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct slim_device *sdev = context;
+
+ return slim_read(sdev, *(u16 *)reg, val_size, val);
+}
+
+static const struct regmap_bus regmap_slimbus_bus = {
+ .write = regmap_slimbus_write,
+ .read = regmap_slimbus_read,
+ .reg_format_endian_default = REGMAP_ENDIAN_LITTLE,
+ .val_format_endian_default = REGMAP_ENDIAN_LITTLE,
+};
+
+static const struct regmap_bus *regmap_get_slimbus(struct slim_device *slim,
+ const struct regmap_config *config)
+{
+ if (config->val_bits == 8 && config->reg_bits == 16)
+ return &regmap_slimbus_bus;
+
+ return ERR_PTR(-ENOTSUPP);
+}
+
+struct regmap *__regmap_init_slimbus(struct slim_device *slimbus,
+ const struct regmap_config *config,
+ struct lock_class_key *lock_key,
+ const char *lock_name)
+{
+ const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config);
+
+ if (IS_ERR(bus))
+ return ERR_CAST(bus);
+
+ return __regmap_init(&slimbus->dev, bus, &slimbus->dev, config,
+ lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__regmap_init_slimbus);
+
+struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
+ const struct regmap_config *config,
+ struct lock_class_key *lock_key,
+ const char *lock_name)
+{
+ const struct regmap_bus *bus = regmap_get_slimbus(slimbus, config);
+
+ if (IS_ERR(bus))
+ return ERR_CAST(bus);
+
+ return __devm_regmap_init(&slimbus->dev, bus, &slimbus, config,
+ lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__devm_regmap_init_slimbus);
+
+MODULE_LICENSE("GPL v2");