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SubjectRe: [PATCH 3/3] media: platform: meson-ao-cec-g12a: add wakeup support
Hi Guillaume,

(I don't know the specifics of this hardware but I have two general
comments below)

On Thu, Dec 12, 2019 at 4:00 PM Guillaume La Roque
<glaroque@baylibre.com> wrote:
> +#define CECB_FUNC_CFG_REG 0xA0
> +#define CECB_FUNC_CFG_MASK GENMASK(6, 0)
> +#define CECB_FUNC_CFG_CEC_ON 0x01
> +#define CECB_FUNC_CFG_OTP_ON 0x02
> +#define CECB_FUNC_CFG_AUTO_STANDBY 0x04
> +#define CECB_FUNC_CFG_AUTO_POWER_ON 0x08
> +#define CECB_FUNC_CFG_ALL 0x2f
> +#define CECB_FUNC_CFG_NONE 0x0
> +
> +#define CECB_LOG_ADDR_REG 0xA4
> +#define CECB_LOG_ADDR_MASK GENMASK(22, 16)
do these registers have some RTI_* prefix in the datasheet?
that would make it easier to spot that these registers belong to AO /
RTI (while all other registers belong to the CEC controller)

[...]
> + if (ao_cec->regmap_ao_sysctrl)
> + ret |= regmap_update_bits(ao_cec->regmap_ao_sysctrl,
> + CECB_LOG_ADDR_REG,
> + CECB_FUNC_CFG_MASK,
why do we need to mask CECB_FUNC_CFG_MASK (from register 0xa0) in the
CECB_LOG_ADDR_REG register (0xa4)?

> + logical_addr << CECB_LOG_ADDR_SHIFT);
FIELD_PREP(CECB_FUNC_CFG_MASK, logical_addr) would make it consistent
with the rest of the driver
then you can also drop the #define CECB_LOG_ADDR_SHIFT


Martin

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