[PATCH v4 4/5] soc: samsung: exynos-chipid: add google,gs101-otp support

[André Draszik]

On Mon, 2025-12-22 at 16:30 +0000, Tudor Ambarus wrote:
> GS101 is different (but also e850 and autov9 I assume) from the SoCs
> that are currently handled by the exynos-chipid driver because the
> chip ID info is part of the OTP registers. GS101 OTP has a clock, an
> interrupt line, a register space (that contains product and chip ID,
> TMU data, ASV, etc) and a 32Kbit memory space that can be
> read/program/locked with specific commands. On GS101 the "ChipID block"
> is just an abstraction, it's not a physical device. When the power-on
> sequence progresses, the OTP chipid values are loaded to the OTP
> registers.
> 
> Add the GS101 chip ID support. The support is intentionally added in the
> exynos-chipid driver, and not in a dedicated Exynos OTP driver, because
> we estimate that there will not be any OTP consumers in the kernel other
> than the chip ID/SoC interface. The downstream GS101 drivers confirm
> this supposition.
> 
> Signed-off-by: Tudor Ambarus <tudor.ambarus at linaro.org>
> ---
>  drivers/soc/samsung/exynos-chipid.c | 70 ++++++++++++++++++++++++++++++++-----
>  1 file changed, 61 insertions(+), 9 deletions(-)

Reviewed-by: André Draszik <andre.draszik at linaro.org>