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regmap: Updates for v4.4

Browse source 
Quite a few new features for regmap this time, mostly expanding things
 around the edges of the existing functionality to cover more devices
 rather than thinsg with wide applicability:
 
  - Support for offload of the update_bits() operation to hardware where
    devices implement bit level access.
  - Support for a few extra operations that need scratch buffers on
    fast_io devices where we can't sleep.
  - Expanded the feature set of regmap_irq to cope with some extra
    register layouts.
  - Cleanups to the debugfs code.
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Merge tag 'regmap-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "Quite a few new features for regmap this time, mostly expanding things
  around the edges of the existing functionality to cover more devices
  rather than thinsg with wide applicability:

   - Support for offload of the update_bits() operation to hardware
     where devices implement bit level access.
   - Support for a few extra operations that need scratch buffers on
     fast_io devices where we can't sleep.
   - Expanded the feature set of regmap_irq to cope with some extra
     register layouts.
   - Cleanups to the debugfs code"

* tag 'regmap-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: Allow installing custom reg_update_bits function
  regmap: debugfs: simplify regmap_reg_ranges_read_file() slightly
  regmap: debugfs: use memcpy instead of snprintf
  regmap: debugfs: use snprintf return value in regmap_reg_ranges_read_file()
  regmap: Add generic macro to define regmap_irq
  regmap: debugfs: Remove scratch buffer for register length calculation
  regmap: irq: add ack_invert flag for chips using cleared bits as ack
  regmap: irq: add support for chips who have separate unmask registers
  regmap: Allocate buffers with GFP_ATOMIC when fast_io == true
This commit is contained in:
Linus Torvalds 2015-11-02 16:16:24 -08:00
commit 5062ecdb66
5 changed files with 91 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/linux/regmap.h
View file

@ -296,6 +296,8 @@ typedef int (*regmap_hw_reg_read)(void *context, unsigned int reg,
unsigned int *val);
typedef int (*regmap_hw_reg_write)(void *context, unsigned int reg,
unsigned int val);
typedef int (*regmap_hw_reg_update_bits)(void *context, unsigned int reg,
unsigned int mask, unsigned int val);
typedef struct regmap_async *(*regmap_hw_async_alloc)(void);
typedef void (*regmap_hw_free_context)(void *context);
@ -335,6 +337,7 @@ struct regmap_bus {
regmap_hw_gather_write gather_write;
regmap_hw_async_write async_write;
regmap_hw_reg_write reg_write;
regmap_hw_reg_update_bits reg_update_bits;
regmap_hw_read read;
regmap_hw_reg_read reg_read;
regmap_hw_free_context free_context;
@ -791,6 +794,9 @@ struct regmap_irq {
unsigned int mask;
};
#define REGMAP_IRQ_REG(_irq, _off, _mask) \
[_irq] = { .reg_offset = (_off), .mask = (_mask) }
/**
* Description of a generic regmap irq_chip. This is not intended to
* handle every possible interrupt controller, but it should handle a
@ -800,6 +806,8 @@ struct regmap_irq {
*
* @status_base: Base status register address.
* @mask_base: Base mask register address.
* @unmask_base: Base unmask register address. for chips who have
* separate mask and unmask registers
* @ack_base: Base ack address. If zero then the chip is clear on read.
* Using zero value is possible with @use_ack bit.
* @wake_base: Base address for wake enables. If zero unsupported.
@ -807,6 +815,7 @@ struct regmap_irq {
* @init_ack_masked: Ack all masked interrupts once during initalization.
* @mask_invert: Inverted mask register: cleared bits are masked out.
* @use_ack: Use @ack register even if it is zero.
* @ack_invert: Inverted ack register: cleared bits for ack.
* @wake_invert: Inverted wake register: cleared bits are wake enabled.
* @runtime_pm: Hold a runtime PM lock on the device when accessing it.
*
@ -820,12 +829,14 @@ struct regmap_irq_chip {
unsigned int status_base;
unsigned int mask_base;
unsigned int unmask_base;
unsigned int ack_base;
unsigned int wake_base;
unsigned int irq_reg_stride;
bool init_ack_masked:1;
bool mask_invert:1;
bool use_ack:1;
bool ack_invert:1;
bool wake_invert:1;
bool runtime_pm:1;