On Fri, 11 Nov 2016, Chen-Yu Tsai wrote:
> 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 <w...@csie.org>
> ---
> drivers/mfd/axp20x.c | 3 ++-
> include/linux/mfd/axp20x.h | 2 ++
> 2 files changed, 4 insertions(+), 1 deletion(-)
Applied, thanks.
> diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
> index ba130be32e61..cdaeb34a9a38 100644
> --- a/drivers/mfd/axp20x.c
> +++ b/drivers/mfd/axp20x.c
> @@ -135,6 +135,7 @@ 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[] = {
> @@ -305,7 +306,7 @@ 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,
> };
>
> diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
> index fec597fb34cb..7e85ececcedf 100644
> --- a/include/linux/mfd/axp20x.h
> +++ b/include/linux/mfd/axp20x.h
> @@ -115,6 +115,8 @@ enum {
> #define AXP806_CLDO2_V_CTRL 0x25
> #define AXP806_CLDO3_V_CTRL 0x26
> #define AXP806_VREF_TEMP_WARN_L 0xf3
> +#define AXP806_BUS_ADDR_EXT 0xfe
> +#define AXP806_REG_ADDR_EXT 0xff
>
> /* Interrupt */
> #define AXP152_IRQ1_EN 0x40
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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