From c6f39257c952bc7da974bf93255936ff2ece2c34 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Sat, 31 Aug 2013 17:48:19 +0100 Subject: [PATCH] mfd: twl6040: Use regmap for register cache Rather then open coding a cache of the vibra control registers use the regmap cache code. Also cache the interrupt mask register, providing a small performance improvement for the interrupt code. Signed-off-by: Mark Brown Acked-by: Peter Ujfalusi Signed-off-by: Samuel Ortiz --- drivers/mfd/twl6040.c | 43 ++++++++++++++++++++++++++----------- include/linux/mfd/twl6040.h | 1 - 2 files changed, 30 insertions(+), 14 deletions(-) diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c index 492ee2cd3400..c7df66a208d4 100644 --- a/drivers/mfd/twl6040.c +++ b/drivers/mfd/twl6040.c @@ -63,15 +63,9 @@ int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg) int ret; unsigned int val; - /* Vibra control registers from cache */ - if (unlikely(reg == TWL6040_REG_VIBCTLL || - reg == TWL6040_REG_VIBCTLR)) { - val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)]; - } else { - ret = regmap_read(twl6040->regmap, reg, &val); - if (ret < 0) - return ret; - } + ret = regmap_read(twl6040->regmap, reg, &val); + if (ret < 0) + return ret; return val; } @@ -82,9 +76,6 @@ int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val) int ret; ret = regmap_write(twl6040->regmap, reg, val); - /* Cache the vibra control registers */ - if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR) - twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val; return ret; } @@ -461,9 +452,20 @@ EXPORT_SYMBOL(twl6040_get_sysclk); /* Get the combined status of the vibra control register */ int twl6040_get_vibralr_status(struct twl6040 *twl6040) { + unsigned int reg; + int ret; u8 status; - status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1]; + ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, ®); + if (ret != 0) + return ret; + status = reg; + + ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, ®); + if (ret != 0) + return ret; + status |= reg; + status &= (TWL6040_VIBENA | TWL6040_VIBSEL); return status; @@ -490,12 +492,27 @@ static bool twl6040_readable_reg(struct device *dev, unsigned int reg) return true; } +static bool twl6040_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case TWL6040_REG_VIBCTLL: + case TWL6040_REG_VIBCTLR: + case TWL6040_REG_INTMR: + return false; + default: + return true; + } +} + static struct regmap_config twl6040_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TWL6040_REG_STATUS, /* 0x2e */ .readable_reg = twl6040_readable_reg, + .volatile_reg = twl6040_volatile_reg, + + .cache_type = REGCACHE_RBTREE, }; static const struct regmap_irq twl6040_irqs[] = { diff --git a/include/linux/mfd/twl6040.h b/include/linux/mfd/twl6040.h index 7e7fbce7a308..2b7d26573431 100644 --- a/include/linux/mfd/twl6040.h +++ b/include/linux/mfd/twl6040.h @@ -229,7 +229,6 @@ struct twl6040 { int audpwron; int power_count; int rev; - u8 vibra_ctrl_cache[2]; /* PLL configuration */ int pll; -- 2.20.1