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-rw-r--r--drivers/base/regmap/Kconfig4
-rw-r--r--drivers/base/regmap/internal.h2
-rw-r--r--drivers/base/regmap/regmap-w1.c4
-rw-r--r--drivers/base/regmap/regmap.c111
4 files changed, 103 insertions, 18 deletions
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 073c0b77e5b3..e7fa7b4bf9af 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -5,6 +5,7 @@
config REGMAP
default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ)
select IRQ_DOMAIN if REGMAP_IRQ
+ select REGMAP_HWSPINLOCK if HWSPINLOCK=y
bool
config REGCACHE_COMPRESSED
@@ -36,3 +37,6 @@ config REGMAP_MMIO
config REGMAP_IRQ
bool
+
+config REGMAP_HWSPINLOCK
+ bool
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 2a4435d76028..8641183cac2f 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -157,6 +157,8 @@ struct regmap {
struct rb_root range_tree;
void *selector_work_buf; /* Scratch buffer used for selector */
+
+ struct hwspinlock *hwlock;
};
struct regcache_ops {
diff --git a/drivers/base/regmap/regmap-w1.c b/drivers/base/regmap/regmap-w1.c
index 5f04e7bf063e..e6c64b0be5b2 100644
--- a/drivers/base/regmap/regmap-w1.c
+++ b/drivers/base/regmap/regmap-w1.c
@@ -1,7 +1,7 @@
/*
* Register map access API - W1 (1-Wire) support
*
- * Copyright (C) 2017 OAO Radioavionica
+ * Copyright (c) 2017 Radioavionica Corporation
* Author: Alex A. Mihaylov <minimumlaw@rambler.ru>
*
* This program is free software; you can redistribute it and/or modify
@@ -11,7 +11,7 @@
#include <linux/regmap.h>
#include <linux/module.h>
-#include "../../w1/w1.h"
+#include <linux/w1.h>
#include "internal.h"
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index b9a779a4a739..8d516a9bfc01 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -20,6 +20,7 @@
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/log2.h>
+#include <linux/hwspinlock.h>
#define CREATE_TRACE_POINTS
#include "trace.h"
@@ -413,6 +414,51 @@ static unsigned int regmap_parse_64_native(const void *buf)
}
#endif
+#ifdef REGMAP_HWSPINLOCK
+static void regmap_lock_hwlock(void *__map)
+{
+ struct regmap *map = __map;
+
+ hwspin_lock_timeout(map->hwlock, UINT_MAX);
+}
+
+static void regmap_lock_hwlock_irq(void *__map)
+{
+ struct regmap *map = __map;
+
+ hwspin_lock_timeout_irq(map->hwlock, UINT_MAX);
+}
+
+static void regmap_lock_hwlock_irqsave(void *__map)
+{
+ struct regmap *map = __map;
+
+ hwspin_lock_timeout_irqsave(map->hwlock, UINT_MAX,
+ &map->spinlock_flags);
+}
+
+static void regmap_unlock_hwlock(void *__map)
+{
+ struct regmap *map = __map;
+
+ hwspin_unlock(map->hwlock);
+}
+
+static void regmap_unlock_hwlock_irq(void *__map)
+{
+ struct regmap *map = __map;
+
+ hwspin_unlock_irq(map->hwlock);
+}
+
+static void regmap_unlock_hwlock_irqrestore(void *__map)
+{
+ struct regmap *map = __map;
+
+ hwspin_unlock_irqrestore(map->hwlock, &map->spinlock_flags);
+}
+#endif
+
static void regmap_lock_mutex(void *__map)
{
struct regmap *map = __map;
@@ -627,6 +673,34 @@ struct regmap *__regmap_init(struct device *dev,
map->lock = config->lock;
map->unlock = config->unlock;
map->lock_arg = config->lock_arg;
+ } else if (config->hwlock_id) {
+#ifdef REGMAP_HWSPINLOCK
+ map->hwlock = hwspin_lock_request_specific(config->hwlock_id);
+ if (!map->hwlock) {
+ ret = -ENXIO;
+ goto err_map;
+ }
+
+ switch (config->hwlock_mode) {
+ case HWLOCK_IRQSTATE:
+ map->lock = regmap_lock_hwlock_irqsave;
+ map->unlock = regmap_unlock_hwlock_irqrestore;
+ break;
+ case HWLOCK_IRQ:
+ map->lock = regmap_lock_hwlock_irq;
+ map->unlock = regmap_unlock_hwlock_irq;
+ break;
+ default:
+ map->lock = regmap_lock_hwlock;
+ map->unlock = regmap_unlock_hwlock;
+ break;
+ }
+
+ map->lock_arg = map;
+#else
+ ret = -EINVAL;
+ goto err_map;
+#endif
} else {
if ((bus && bus->fast_io) ||
config->fast_io) {
@@ -729,7 +803,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_write = regmap_format_2_6_write;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
@@ -739,7 +813,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_write = regmap_format_4_12_write;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
@@ -749,7 +823,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_write = regmap_format_7_9_write;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
@@ -759,7 +833,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_write = regmap_format_10_14_write;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
@@ -779,13 +853,13 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_reg = regmap_format_16_native;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
case 24:
if (reg_endian != REGMAP_ENDIAN_BIG)
- goto err_map;
+ goto err_hwlock;
map->format.format_reg = regmap_format_24;
break;
@@ -801,7 +875,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_reg = regmap_format_32_native;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
@@ -818,13 +892,13 @@ struct regmap *__regmap_init(struct device *dev,
map->format.format_reg = regmap_format_64_native;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
#endif
default:
- goto err_map;
+ goto err_hwlock;
}
if (val_endian == REGMAP_ENDIAN_NATIVE)
@@ -853,12 +927,12 @@ struct regmap *__regmap_init(struct device *dev,
map->format.parse_val = regmap_parse_16_native;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
case 24:
if (val_endian != REGMAP_ENDIAN_BIG)
- goto err_map;
+ goto err_hwlock;
map->format.format_val = regmap_format_24;
map->format.parse_val = regmap_parse_24;
break;
@@ -879,7 +953,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.parse_val = regmap_parse_32_native;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
#ifdef CONFIG_64BIT
@@ -900,7 +974,7 @@ struct regmap *__regmap_init(struct device *dev,
map->format.parse_val = regmap_parse_64_native;
break;
default:
- goto err_map;
+ goto err_hwlock;
}
break;
#endif
@@ -909,18 +983,18 @@ struct regmap *__regmap_init(struct device *dev,
if (map->format.format_write) {
if ((reg_endian != REGMAP_ENDIAN_BIG) ||
(val_endian != REGMAP_ENDIAN_BIG))
- goto err_map;
+ goto err_hwlock;
map->use_single_write = true;
}
if (!map->format.format_write &&
!(map->format.format_reg && map->format.format_val))
- goto err_map;
+ goto err_hwlock;
map->work_buf = kzalloc(map->format.buf_size, GFP_KERNEL);
if (map->work_buf == NULL) {
ret = -ENOMEM;
- goto err_map;
+ goto err_hwlock;
}
if (map->format.format_write) {
@@ -1041,6 +1115,9 @@ err_regcache:
err_range:
regmap_range_exit(map);
kfree(map->work_buf);
+err_hwlock:
+ if (IS_ENABLED(REGMAP_HWSPINLOCK) && map->hwlock)
+ hwspin_lock_free(map->hwlock);
err_map:
kfree(map);
err:
@@ -1228,6 +1305,8 @@ void regmap_exit(struct regmap *map)
kfree(async->work_buf);
kfree(async);
}
+ if (IS_ENABLED(REGMAP_HWSPINLOCK) && map->hwlock)
+ hwspin_lock_free(map->hwlock);
kfree(map);
}
EXPORT_SYMBOL_GPL(regmap_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 01:55:51 +0000