linux-kernel - Re: [PATCH 2/2] soc: samsung: exynos-pmu: update to use of_syscon_register

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Date: Mon, 17 Jun 2024 10:35:05 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Peter Griffin <peter.griffin@...aro.org>, lee@...nel.org, arnd@...db.de,
  krzk@...nel.org, alim.akhtar@...sung.com
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
  linux-kernel@...r.kernel.org, tudor.ambarus@...aro.org,
 saravanak@...gle.com,  willmcvicker@...gle.com, semen.protsenko@...aro.org,
 kernel-team@...roid.com
Subject: Re: [PATCH 2/2] soc: samsung: exynos-pmu: update to use
 of_syscon_register_regmap()

On Fri, 2024-06-14 at 15:04 +0100, Peter Griffin wrote:
> For SoCs like gs101 that need a special regmap, register this with
> of_syscon_register_regmap api, so it can be returned by
> syscon_regmap_lookup_by_phandle() and friends.
> 
> For SoCs that don't require a custom regmap, revert back to syscon
> creating the mmio regmap rather than duplicating the logic here.
> 
> exynos_get_pmu_regmap_by_phandle() api is also updated to retrieve
> the regmap via syscon. The exynos_get_pmu_regmap_by_phandle() api
> is kept around until fw_devlink support for syscon property is added
> for the pinctrl-samsung driver that also runs at postcore_initcall
> level.
> 
> All other exynos client drivers can revert back to
> syscon_regmap_lookup_by_phandle().
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>

With this series, the exynos5 usb phy driver works on gs101 without
having to patch it to use exynos_get_pmu_regmap_by_phandle() instead
of the standard syscon_regmap_lookup_by_phandle():

Tested-by: André Draszik <andre.draszik@...aro.org>