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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 07:55:48 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 07:55:48 -0800
commit99b8f42ee2ab93077154f09d397cdc1dfb15926e (patch)
tree5a76a94a568fcf306743f9708b940410fab1ad14 /include
parent139353ffbe42ac7abda42f3259c1c374cbf4b779 (diff)
parent7c8a2994309214cbb6dba33cd72ec85f91fd6fcd (diff)
Merge tag 'regmap-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown: "Quite a few enhancements this time around, helpers and diagnostics for the most part which is good to see: - Addition of table based lookups for the register access checks from Davide Ciminaghi, making life easier for drivers with big blocks of similar registers. - Allow drivers to get the irqdomain for regmap irq_chips, allowing the domain to be used with other APIs. - Debug improvements for paged register maps. - Performance improvments for some of the diagnostic infrastructure, very helpful for devices with large register maps." * tag 'regmap-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: debugfs: Cache offsets of valid regions for dump regmap: debugfs: Factor out initial seek regmap: debugfs: Avoid overflows for very small reads regmap: Cache register and value sizes for debugfs regmap: introduce tables for readable/writeable/volatile/precious checks regmap: core: Report registers in hex when we can't cache regmap: Fix printing of size_t variable regmap: make lock/unlock functions customizable regmap: silence GCC warning regmap: Split raw writes that cross window boundaries regmap: Make return code checks consistent regmap: Factor range lookup out of page selection regmap: Provide debugfs read of register ranges regmap: Factor out debugfs register read regmap: Allow ranges to be named regmap: When we sanity check during range adds say what errors we find regmap: Rename n_ranges to num_ranges regmap: irq: Allow users to retrieve the irq_domain
Diffstat (limited to 'include')
-rw-r--r--include/linux/regmap.h95
1 files changed, 88 insertions, 7 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index e3bcc3f4dcb..b7e95bf942c 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -19,6 +19,7 @@
struct module;
struct device;
struct i2c_client;
+struct irq_domain;
struct spi_device;
struct regmap;
struct regmap_range_cfg;
@@ -54,6 +55,39 @@ enum regmap_endian {
};
/**
+ * A register range, used for access related checks
+ * (readable/writeable/volatile/precious checks)
+ *
+ * @range_min: address of first register
+ * @range_max: address of last register
+ */
+struct regmap_range {
+ unsigned int range_min;
+ unsigned int range_max;
+};
+
+/*
+ * A table of ranges including some yes ranges and some no ranges.
+ * If a register belongs to a no_range, the corresponding check function
+ * will return false. If a register belongs to a yes range, the corresponding
+ * check function will return true. "no_ranges" are searched first.
+ *
+ * @yes_ranges : pointer to an array of regmap ranges used as "yes ranges"
+ * @n_yes_ranges: size of the above array
+ * @no_ranges: pointer to an array of regmap ranges used as "no ranges"
+ * @n_no_ranges: size of the above array
+ */
+struct regmap_access_table {
+ const struct regmap_range *yes_ranges;
+ unsigned int n_yes_ranges;
+ const struct regmap_range *no_ranges;
+ unsigned int n_no_ranges;
+};
+
+typedef void (*regmap_lock)(void *);
+typedef void (*regmap_unlock)(void *);
+
+/**
* Configuration for the register map of a device.
*
* @name: Optional name of the regmap. Useful when a device has multiple
@@ -67,16 +101,39 @@ enum regmap_endian {
* @val_bits: Number of bits in a register value, mandatory.
*
* @writeable_reg: Optional callback returning true if the register
- * can be written to.
+ * can be written to. If this field is NULL but wr_table
+ * (see below) is not, the check is performed on such table
+ * (a register is writeable if it belongs to one of the ranges
+ * specified by wr_table).
* @readable_reg: Optional callback returning true if the register
- * can be read from.
+ * can be read from. If this field is NULL but rd_table
+ * (see below) is not, the check is performed on such table
+ * (a register is readable if it belongs to one of the ranges
+ * specified by rd_table).
* @volatile_reg: Optional callback returning true if the register
- * value can't be cached.
+ * value can't be cached. If this field is NULL but
+ * volatile_table (see below) is not, the check is performed on
+ * such table (a register is volatile if it belongs to one of
+ * the ranges specified by volatile_table).
* @precious_reg: Optional callback returning true if the rgister
- * should not be read outside of a call from the driver
- * (eg, a clear on read interrupt status register).
+ * should not be read outside of a call from the driver
+ * (eg, a clear on read interrupt status register). If this
+ * field is NULL but precious_table (see below) is not, the
+ * check is performed on such table (a register is precious if
+ * it belongs to one of the ranges specified by precious_table).
+ * @lock: Optional lock callback (overrides regmap's default lock
+ * function, based on spinlock or mutex).
+ * @unlock: As above for unlocking.
+ * @lock_arg: this field is passed as the only argument of lock/unlock
+ * functions (ignored in case regular lock/unlock functions
+ * are not overridden).
*
* @max_register: Optional, specifies the maximum valid register index.
+ * @wr_table: Optional, points to a struct regmap_access_table specifying
+ * valid ranges for write access.
+ * @rd_table: As above, for read access.
+ * @volatile_table: As above, for volatile registers.
+ * @precious_table: As above, for precious registers.
* @reg_defaults: Power on reset values for registers (for use with
* register cache support).
* @num_reg_defaults: Number of elements in reg_defaults.
@@ -116,8 +173,15 @@ struct regmap_config {
bool (*readable_reg)(struct device *dev, unsigned int reg);
bool (*volatile_reg)(struct device *dev, unsigned int reg);
bool (*precious_reg)(struct device *dev, unsigned int reg);
+ regmap_lock lock;
+ regmap_unlock unlock;
+ void *lock_arg;
unsigned int max_register;
+ const struct regmap_access_table *wr_table;
+ const struct regmap_access_table *rd_table;
+ const struct regmap_access_table *volatile_table;
+ const struct regmap_access_table *precious_table;
const struct reg_default *reg_defaults;
unsigned int num_reg_defaults;
enum regcache_type cache_type;
@@ -133,7 +197,7 @@ struct regmap_config {
enum regmap_endian val_format_endian;
const struct regmap_range_cfg *ranges;
- unsigned int n_ranges;
+ unsigned int num_ranges;
};
/**
@@ -142,6 +206,8 @@ struct regmap_config {
* 1. page selector register update;
* 2. access through data window registers.
*
+ * @name: Descriptive name for diagnostics
+ *
* @range_min: Address of the lowest register address in virtual range.
* @range_max: Address of the highest register in virtual range.
*
@@ -153,6 +219,8 @@ struct regmap_config {
* @window_len: Number of registers in data window.
*/
struct regmap_range_cfg {
+ const char *name;
+
/* Registers of virtual address range */
unsigned int range_min;
unsigned int range_max;
@@ -181,7 +249,9 @@ typedef void (*regmap_hw_free_context)(void *context);
* Description of a hardware bus for the register map infrastructure.
*
* @fast_io: Register IO is fast. Use a spinlock instead of a mutex
- * to perform locking.
+ * to perform locking. This field is ignored if custom lock/unlock
+ * functions are used (see fields lock/unlock of
+ * struct regmap_config).
* @write: Write operation.
* @gather_write: Write operation with split register/value, return -ENOTSUPP
* if not implemented on a given device.
@@ -262,6 +332,16 @@ void regcache_mark_dirty(struct regmap *map);
int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int num_regs);
+static inline bool regmap_reg_in_range(unsigned int reg,
+ const struct regmap_range *range)
+{
+ return reg >= range->range_min && reg <= range->range_max;
+}
+
+bool regmap_reg_in_ranges(unsigned int reg,
+ const struct regmap_range *ranges,
+ unsigned int nranges);
+
/**
* Description of an IRQ for the generic regmap irq_chip.
*
@@ -317,6 +397,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data);
int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data);
int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq);
+struct irq_domain *regmap_irq_get_domain(struct regmap_irq_chip_data *data);
#else