On Thu, Jul 08, 2021 at 08:33:48PM +0200, Stephan Gerhold wrote: > All devices based on ST-Ericsson Ux500 use a PMIC similar to AB8500 > (Analog Baseband). There is AB8500, AB8505, AB9540 and AB8540 > although in practice only AB8500 and AB8505 are relevant since the > platforms with AB9540 and AB8540 were cancelled and never used in > production. > > In general, the AB8500 PMIC uses I2C as control interface, where the > different register banks are represented as separate I2C devices. > However, in practice AB8500 is always connected to a special I2C bus > on the DB8500 SoC that is controlled by the power/reset/clock > management unit (PRCMU) firmware. > > Add a simple driver that allows reading/writing registers of the > AB8500 PMIC. The driver directly accesses registers from the PRCMU > parent device (represented by syscon in U-Boot). Abstracting it > further (e.g. with the i2c uclass) would not provide any advantage > because the PRCMU I2C bus is always just connected to AB8500 and > vice-versa. > > The ab8500.h header is mostly taken as-is from Linux (with some > minor adjustments) to allow using similar code in both Linux and > U-Boot. > > Cc: Linus Walleij <linus.wall...@linaro.org> > Signed-off-by: Stephan Gerhold <step...@gerhold.net> > Acked-by: Jaehoon Chung <jh80.ch...@samsung.com>
Applied to u-boot/master, thanks! -- Tom
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