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| author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-07-18 11:50:47 +0530 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-07-25 00:36:53 +0200 |
| commit | 75edd5af601800cf1c8797ed1da14f4ddbda6d47 (patch) | |
| tree | 2494babc10b9d13a1bcf757f1ca2f5a3b2d0265d /drivers/mfd/tps6586x.c | |
| parent | 1176b5be67692e910c8d4b055902c314e7249e36 (diff) | |
| download | talos-op-linux-75edd5af601800cf1c8797ed1da14f4ddbda6d47.tar.gz talos-op-linux-75edd5af601800cf1c8797ed1da14f4ddbda6d47.zip | |
mfd: Cache tps6586x register through regmap
To cache the interrupt mask register, use the regmap RB_TREE
cache-ing mechanism in place of implementing it locally.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/tps6586x.c')
| -rw-r--r-- | drivers/mfd/tps6586x.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/mfd/tps6586x.c b/drivers/mfd/tps6586x.c index 6f59594c6c11..d59bfb77326b 100644 --- a/drivers/mfd/tps6586x.c +++ b/drivers/mfd/tps6586x.c @@ -104,7 +104,6 @@ struct tps6586x { struct mutex irq_lock; int irq_base; u32 irq_en; - u8 mask_cache[5]; u8 mask_reg[5]; }; @@ -276,12 +275,11 @@ static void tps6586x_irq_sync_unlock(struct irq_data *data) int i; for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { - if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) { - if (!WARN_ON(tps6586x_write(tps6586x->dev, - TPS6586X_INT_MASK1 + i, - tps6586x->mask_reg[i]))) - tps6586x->mask_cache[i] = tps6586x->mask_reg[i]; - } + int ret; + ret = tps6586x_write(tps6586x->dev, + TPS6586X_INT_MASK1 + i, + tps6586x->mask_reg[i]); + WARN_ON(ret); } mutex_unlock(&tps6586x->irq_lock); @@ -328,7 +326,6 @@ static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq, mutex_init(&tps6586x->irq_lock); for (i = 0; i < 5; i++) { - tps6586x->mask_cache[i] = 0xff; tps6586x->mask_reg[i] = 0xff; tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); } @@ -478,10 +475,21 @@ static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *clien } #endif +static bool is_volatile_reg(struct device *dev, unsigned int reg) +{ + /* Cache all interrupt mask register */ + if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5)) + return false; + + return true; +} + static const struct regmap_config tps6586x_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TPS6586X_MAX_REGISTER - 1, + .volatile_reg = is_volatile_reg, + .cache_type = REGCACHE_RBTREE, }; static int __devinit tps6586x_i2c_probe(struct i2c_client *client, |
