Re: [PATCH v4 2/5] platform/x86: intel_pmc_ipc: Add pmc gcr read/write/update api's

[Andy Shevchenko]

On Sat, Apr 1, 2017 at 2:27 AM, Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
> This patch adds API's to read/write/update PMC GC registers.
> PMC dependent devices like iTCO_WDT, Telemetry has requirement

iTCO_wdt

> to acces GCR registers. These API's can be used for this
> purpose.

> --- a/drivers/platform/x86/intel_pmc_ipc.c
> +++ b/drivers/platform/x86/intel_pmc_ipc.c

> +static inline int is_gcr_valid(u32 offset)

Pointer to ipcdev should be a parameter to this function.

> +{
> +       if (!ipcdev.has_gcr_regs)
> +               return -EACCES;
> +
> +       if (offset > PLAT_RESOURCE_GCR_SIZE)
> +               return -EINVAL;
> +
> +       return 0;
> +}

> +/**
> + * intel_pmc_gcr_update() - Update PMC GCR register bits
> + * @offset:    offset of GCR register from GCR address base
> + * @mask:      bit mask for update operation
> + * @val:       update value
> + *

> + * Updates the bits of given GCR register as specified by
> + * mask and val

-> * @mask and @val.

You would need to refresh how to use kernel doc.

> + *
> + * Return:     negative value on error or 0 on success.
> + */

With Best Regards,
Andy Shevchenko