From 34d9030b5d06ec0072796b3ab6a3fa24e53ece3d Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Fri, 11 Nov 2016 11:29:52 +0800 Subject: mfd: axp20x: Add address extension registers for AXP806 regmap The AXP806 supports either master/standalone or slave mode. Slave mode allows sharing the serial bus, even with multiple AXP806 which all have the same hardware address. This is done with extra "serial interface address extension", or AXP806_BUS_ADDR_EXT, and "register address extension", or AXP806_REG_ADDR_EXT, registers. The former is read-only, with 1 bit customizable at the factory, and 1 bit depending on the state of an external pin. The latter is writable. Only when the these device addressing bits (in the upper 4 bits of the registers) match, will the device respond to operations on its other registers. Add these 2 registers to the regmap so we can access them. Signed-off-by: Chen-Yu Tsai Signed-off-by: Lee Jones --- drivers/mfd/axp20x.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/mfd') diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c index 98377d29b783b..ed918de84238c 100644 --- a/drivers/mfd/axp20x.c +++ b/drivers/mfd/axp20x.c @@ -136,6 +136,7 @@ static const struct regmap_range axp806_writeable_ranges[] = { regmap_reg_range(AXP806_PWR_OUT_CTRL1, AXP806_CLDO3_V_CTRL), regmap_reg_range(AXP20X_IRQ1_EN, AXP20X_IRQ2_EN), regmap_reg_range(AXP20X_IRQ1_STATE, AXP20X_IRQ2_STATE), + regmap_reg_range(AXP806_REG_ADDR_EXT, AXP806_REG_ADDR_EXT), }; static const struct regmap_range axp806_volatile_ranges[] = { @@ -306,7 +307,7 @@ static const struct regmap_config axp806_regmap_config = { .val_bits = 8, .wr_table = &axp806_writeable_table, .volatile_table = &axp806_volatile_table, - .max_register = AXP806_VREF_TEMP_WARN_L, + .max_register = AXP806_REG_ADDR_EXT, .cache_type = REGCACHE_RBTREE, }; -- cgit v1.2.3