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regmap: Updates for v3.14 

Nothing terribly exciting with regmap this release, mainly a few small
 extensions to allow more devices to be supported:
 
  - Allow the bulk I/O APIs to be used with no-bus regmaps.
  - Support interrupt controllers with zero ack base.
  - Warning and spelling fixes.
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Merge tag 'regmap-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "Nothing terribly exciting with regmap this release, mainly a few small
  extensions to allow more devices to be supported:

   - Allow the bulk I/O APIs to be used with no-bus regmaps
   - Support interrupt controllers with zero ack base
   - Warning and spelling fixes"

* tag 'regmap-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: fix a couple of typos
  regmap: Allow regmap_bulk_write() to work for "no-bus" regmaps
  regmap: Allow regmap_bulk_read() to work for "no-bus" regmaps
  regmap: irq: Allow using zero value for ack_base
  regmap: Fix 'ret' would return an uninitialized value
This commit is contained in:
Linus Torvalds 2014-01-25 13:18:00 -08:00
parent 4ba9920e5e 86776fc174
commit bb1b64908f
3 changed files with 54 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/base/regmap/regmap-irq.c
View File

@ -113,7 +113,7 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
* OR if there is masked interrupt which hasn't been Acked,
* it'll be ignored in irq handler, then may introduce irq storm
*/
if (d->mask_buf[i] && d->chip->ack_base) {
if (d->mask_buf[i] && (d->chip->ack_base || d->chip->use_ack)) {
reg = d->chip->ack_base +
(i * map->reg_stride * d->irq_reg_stride);
ret = regmap_write(map, reg, d->mask_buf[i]);
@ -271,7 +271,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
for (i = 0; i < data->chip->num_regs; i++) {
data->status_buf[i] &= ~data->mask_buf[i];
if (data->status_buf[i] && chip->ack_base) {
if (data->status_buf[i] && (chip->ack_base || chip->use_ack)) {
reg = chip->ack_base +
(i * map->reg_stride * data->irq_reg_stride);
ret = regmap_write(map, reg, data->status_buf[i]);
@ -448,7 +448,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
goto err_alloc;
}
if (d->status_buf[i] && chip->ack_base) {
if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) {
reg = chip->ack_base +
(i * map->reg_stride * d->irq_reg_stride);
ret = regmap_write(map, reg,

72
drivers/base/regmap/regmap.c
View File

@ -1514,21 +1514,49 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
{
int ret = 0, i;
size_t val_bytes = map->format.val_bytes;
void *wval;
if (!map->bus)
return -EINVAL;
if (!map->format.parse_inplace)
if (map->bus && !map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
map->lock(map->lock_arg);
/*
* Some devices don't support bulk write, for
* them we have a series of single write operations.
*/
if (!map->bus || map->use_single_rw) {
for (i = 0; i < val_count; i++) {
unsigned int ival;
/* No formatting is require if val_byte is 1 */
if (val_bytes == 1) {
wval = (void *)val;
switch (val_bytes) {
case 1:
ival = *(u8 *)(val + (i * val_bytes));
break;
case 2:
ival = *(u16 *)(val + (i * val_bytes));
break;
case 4:
ival = *(u32 *)(val + (i * val_bytes));
break;
#ifdef CONFIG_64BIT
case 8:
ival = *(u64 *)(val + (i * val_bytes));
break;
#endif
default:
ret = -EINVAL;
goto out;
}
ret = _regmap_write(map, reg + (i * map->reg_stride),
ival);
if (ret != 0)
goto out;
}
} else {
void *wval;
wval = kmemdup(val, val_count * val_bytes, GFP_KERNEL);
if (!wval) {
ret = -ENOMEM;
@ -1537,27 +1565,11 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
}
for (i = 0; i < val_count * val_bytes; i += val_bytes)
map->format.parse_inplace(wval + i);
}
/*
* Some devices does not support bulk write, for
* them we have a series of single write operations.
*/
if (map->use_single_rw) {
for (i = 0; i < val_count; i++) {
ret = _regmap_raw_write(map,
reg + (i * map->reg_stride),
val + (i * val_bytes),
val_bytes);
if (ret != 0)
goto out;
}
} else {
ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
}
if (val_bytes != 1)
kfree(wval);
}
out:
map->unlock(map->lock_arg);
return ret;
@ -1897,14 +1909,10 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
size_t val_bytes = map->format.val_bytes;
bool vol = regmap_volatile_range(map, reg, val_count);
if (!map->bus)
return -EINVAL;
if (!map->format.parse_inplace)
return -EINVAL;
if (reg % map->reg_stride)
return -EINVAL;
if (vol || map->cache_type == REGCACHE_NONE) {
if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
/*
* Some devices does not support bulk read, for
* them we have a series of single read operations.
@ -2173,6 +2181,10 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int i, ret;
bool bypass;
if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n",
num_regs))
return 0;
map->lock(map->lock_arg);
bypass = map->cache_bypass;

15
include/linux/regmap.h
View File

@ -122,9 +122,9 @@ typedef void (*regmap_unlock)(void *);
* 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
* @precious_reg: Optional callback returning true if the register
* should not be read outside of a call from the driver
* (eg, a clear on read interrupt status register). If this
* (e.g., 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).
@ -136,9 +136,9 @@ typedef void (*regmap_unlock)(void *);
* are not overridden).
* @reg_read: Optional callback that if filled will be used to perform
* all the reads from the registers. Should only be provided for
* devices whos read operation cannot be represented as a simple read
* operation on a bus such as SPI, I2C, etc. Most of the devices do
* not need this.
* devices whose read operation cannot be represented as a simple
* read operation on a bus such as SPI, I2C, etc. Most of the
* devices do not need this.
* @reg_write: Same as above for writing.
* @fast_io: Register IO is fast. Use a spinlock instead of a mutex
* to perform locking. This field is ignored if custom lock/unlock
@ -497,11 +497,13 @@ struct regmap_irq {
*
* @status_base: Base status register address.
* @mask_base: Base mask register address.
* @ack_base: Base ack address. If zero then the chip is clear on read.
* @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.
* @irq_reg_stride: Stride to use for chips where registers are not contiguous.
* @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.
* @wake_invert: Inverted wake register: cleared bits are wake enabled.
* @runtime_pm: Hold a runtime PM lock on the device when accessing it.
*
@ -520,6 +522,7 @@ struct regmap_irq_chip {
unsigned int irq_reg_stride;
bool init_ack_masked:1;
bool mask_invert:1;
bool use_ack:1;
bool wake_invert:1;
bool runtime_pm:1;