[PATCH v2 1/3] power: pmic: Add driver for ST-Ericsson AB8500 via PRCMU

[Tom Rini]

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.walleij at linaro.org>
> Signed-off-by: Stephan Gerhold <stephan at gerhold.net>
> Acked-by: Jaehoon Chung <jh80.chung at samsung.com>

Applied to u-boot/master, thanks!

-- 
Tom
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