On 01/02/2024 12:29, Peter Griffin wrote:
>>> int ret;
>>>
>>> pmu_base_addr = devm_platform_ioremap_resource(pdev, 0);
>>> @@ -137,6 +333,35 @@ static int exynos_pmu_probe(struct platform_device *pdev)
>>> GFP_KERNEL);
>>> if (!pmu_context)
>>> return -ENOMEM;
>>> +
>>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>> + if (!res)
>>> + return -ENODEV;
>>> +
>>> + pmuregmap_config.max_register = resource_size(res) -
>>> + pmuregmap_config.reg_stride;
>>> +
>>> + if (of_device_is_compatible(np, "google,gs101-pmu")) {
>>
>> No compatibles inside the probe. Use driver match data. This applies to
>> all drivers in all subsystems.
>
> Noted, will fix in v3.
>
>>
>>> + pmuregmap_config.reg_read = tensor_sec_reg_read;
>>> + pmuregmap_config.reg_write = tensor_sec_reg_write;
>>> + pmuregmap_config.reg_update_bits = tensor_sec_update_bits;
>>
>> No, regmap_config should be const and please use match data.
>
> Are you sure you want the regmap_config struct const?
>
> In my draft v3 I have implemented it so far having a regmap_smccfg
> struct which sets all the configuration apart from max_register field
> (used by gs101) and a regmap_mmiocfg struct (used by all other
> exynos-pmu SoCs). The choice over which regmap_config to register is
> made via match data exynos_pmu_data flag 'pmu_secure' which is set
> only for gs101. That avoids having to define exynos_pmu_data structs
> for the other exynos SoCs that currently don't really need them
> (exynos7, exynos850, exynos5443, exyno5410 etc).
>
> But I still wish to set at runtime the regmap_config.max_register
> field based on the resource size coming from DT. Having the structs
> const would prohibit that and mean we need to specify many more
> regmap_config structs where the only difference is the max_register
> field.
>
> Is the above approach acceptable for you?
Having it non-const is one more step of supporting only one instance of
PMU device, but we already rely on such design choice, so I guess it is
fine. If ever needed, this can be easily converted to devm_kmemdup...
Best regards,
Krzysztof
