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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-25 13:18:00 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-25 13:18:00 -0800
commitbb1b64908f5a346b0654f02999e1a022a7e0c07d (patch)
tree0531fff6b1277750bc18c0a54d92be719f213b1c /drivers/base
parent4ba9920e5e9c0e16b5ed24292d45322907bb9035 (diff)
parent86776fc174973e556be7d668763f509a81124f8b (diff)
downloadlinux-bb1b64908f5a346b0654f02999e1a022a7e0c07d.tar.bz2
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
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/regmap/regmap-irq.c6
-rw-r--r--drivers/base/regmap/regmap.c72
2 files changed, 45 insertions, 33 deletions
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 763c60d3d277..82692068d3cb 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -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,
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c2e002100949..6a19515f8a45 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -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;
+
+ 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;
+ }
- /* No formatting is require if val_byte is 1 */
- if (val_bytes == 1) {
- wval = (void *)val;
+ 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;