mfd: sec: Add register cache for interrupt mask registers

The performance of regmap-irq is improved if the interrupt mask registers
can be cached since it does read/modify/update cycles so start using the
register cache infrastructure for those registers. We should use this more
widely but I don't have a datasheet and this is a nice, conservative
starting point.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index e493001..79c0750 100644 (file)
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -106,6 +106,31 @@ int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
 }
 EXPORT_SYMBOL_GPL(sec_reg_update);
 
+static bool s2mps11_volatile(struct device *dev, unsigned int reg)
+{
+       switch (reg) {
+       case S2MPS11_REG_INT1M:
+       case S2MPS11_REG_INT2M:
+       case S2MPS11_REG_INT3M:
+               return false;
+       default:
+               return true;
+       }
+}
+
+static bool s5m8763_volatile(struct device *dev, unsigned int reg)
+{
+       switch (reg) {
+       case S5M8763_REG_IRQM1:
+       case S5M8763_REG_IRQM2:
+       case S5M8763_REG_IRQM3:
+       case S5M8763_REG_IRQM4:
+               return false;
+       default:
+               return true;
+       }
+}
+
 static struct regmap_config sec_regmap_config = {
        .reg_bits = 8,
        .val_bits = 8,
@@ -116,6 +141,8 @@ static struct regmap_config s2mps11_regmap_config = {
        .val_bits = 8,
 
        .max_register = S2MPS11_REG_L38CTRL,
+       .volatile_reg = s2mps11_volatile,
+       .cache_type = REGCACHE_FLAT,
 };
 
 static struct regmap_config s5m8763_regmap_config = {
@@ -123,6 +150,8 @@ static struct regmap_config s5m8763_regmap_config = {
        .val_bits = 8,
 
        .max_register = S5M8763_REG_LBCNFG2,
+       .volatile_reg = s5m8763_volatile,
+       .cache_type = REGCACHE_FLAT,
 };
 
 static struct regmap_config s5m8767_regmap_config = {
@@ -130,6 +159,8 @@ static struct regmap_config s5m8767_regmap_config = {
        .val_bits = 8,
 
        .max_register = S5M8767_REG_LDO28CTRL,
+       .volatile_reg = s2mps11_volatile,
+       .cache_type = REGCACHE_FLAT,
 };
 
 #ifdef CONFIG_OF