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[79.49.235.115]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b72bdbcea51sm1319505466b.4.2025.11.11.03.49.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Nov 2025 03:49:21 -0800 (PST) From: Andrea della Porta X-Google-Original-From: Andrea della Porta Date: Tue, 11 Nov 2025 12:51:40 +0100 To: Stanimir Varbanov Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org, Broadcom internal kernel review list , linux-pm@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Ray Jui , Scott Branden , Lee Jones , Ulf Hansson , Willow Cunningham , Stefan Wahren , Saenz Julienne , Andrea della Porta , Phil Elwell , Jonathan Bell , Dave Stevenson Subject: Re: [PATCH 1/4] pmdomain: bcm: bcm2835-power: Prepare to support BCM2712 Message-ID: References: <20250917063233.1270-1-svarbanov@suse.de> <20250917063233.1270-2-svarbanov@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250917063233.1270-2-svarbanov@suse.de> Hi Stan, On 09:32 Wed 17 Sep , Stanimir Varbanov wrote: > BCM2712 has a PM block but lacks asb and rpivid_asb register > spaces. To avoid unwanted results add a check for asb existence > during probe and also add a new register offset for bcm2712 to > control grafx_v3d power domain. The decision to use the new > register is implicit - if asb register base is null then the > driver is probed for bcm2712 (the other supported SoCs have > asb register space). > > Signed-off-by: Stanimir Varbanov > --- > drivers/pmdomain/bcm/bcm2835-power.c | 17 +++++++++++++---- > 1 file changed, 13 insertions(+), 4 deletions(-) > > diff --git a/drivers/pmdomain/bcm/bcm2835-power.c b/drivers/pmdomain/bcm/bcm2835-power.c > index f5289fd184d0..1d29addfe036 100644 > --- a/drivers/pmdomain/bcm/bcm2835-power.c > +++ b/drivers/pmdomain/bcm/bcm2835-power.c > @@ -79,6 +79,7 @@ > #define PM_IMAGE 0x108 > #define PM_GRAFX 0x10c > #define PM_PROC 0x110 > +#define PM_GRAFX_2712 0x304 > #define PM_ENAB BIT(12) > #define PM_ISPRSTN BIT(8) > #define PM_H264RSTN BIT(7) > @@ -381,6 +382,9 @@ static int bcm2835_power_pd_power_on(struct generic_pm_domain *domain) > return bcm2835_power_power_on(pd, PM_GRAFX); > > case BCM2835_POWER_DOMAIN_GRAFX_V3D: > + if (!power->asb) > + return bcm2835_asb_power_on(pd, PM_GRAFX_2712, > + 0, 0, PM_V3DRSTN); > return bcm2835_asb_power_on(pd, PM_GRAFX, > ASB_V3D_M_CTRL, ASB_V3D_S_CTRL, > PM_V3DRSTN); > @@ -447,6 +451,9 @@ static int bcm2835_power_pd_power_off(struct generic_pm_domain *domain) > return bcm2835_power_power_off(pd, PM_GRAFX); > > case BCM2835_POWER_DOMAIN_GRAFX_V3D: > + if (!power->asb) > + return bcm2835_asb_power_off(pd, PM_GRAFX_2712, > + 0, 0, PM_V3DRSTN); > return bcm2835_asb_power_off(pd, PM_GRAFX, > ASB_V3D_M_CTRL, ASB_V3D_S_CTRL, > PM_V3DRSTN); > @@ -635,10 +642,12 @@ static int bcm2835_power_probe(struct platform_device *pdev) > power->asb = pm->asb; > power->rpivid_asb = pm->rpivid_asb; > > - id = readl(power->asb + ASB_AXI_BRDG_ID); > - if (id != BCM2835_BRDG_ID /* "BRDG" */) { > - dev_err(dev, "ASB register ID returned 0x%08x\n", id); > - return -ENODEV; > + if (power->asb) { > + id = readl(power->asb + ASB_AXI_BRDG_ID); > + if (id != BCM2835_BRDG_ID /* "BRDG" */) { > + dev_err(dev, "ASB register ID returned 0x%08x\n", id); > + return -ENODEV; > + } > } > > if (power->rpivid_asb) { > -- > 2.47.0 > Tested-by: Andrea della Porta Cheers, Andrea