diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0484-soc-bcm-bcm2835-pm-Add-support-for-2711.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0484-soc-bcm-bcm2835-pm-Add-support-for-2711.patch | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0484-soc-bcm-bcm2835-pm-Add-support-for-2711.patch b/target/linux/bcm27xx/patches-4.19/950-0484-soc-bcm-bcm2835-pm-Add-support-for-2711.patch new file mode 100644 index 0000000000..4c87289455 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0484-soc-bcm-bcm2835-pm-Add-support-for-2711.patch @@ -0,0 +1,102 @@ +From f3470769d4e64084fc7f3060d634aff8fdf8f75d Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Fri, 11 Jan 2019 17:31:07 -0800 +Subject: [PATCH] soc: bcm: bcm2835-pm: Add support for 2711. + +Without the actual power management part any more, there's a lot less +to set up for V3D. We just need to clear the RSTN field for the power +domain, and expose the reset controller for toggling it again. + +This is definitely incomplete -- the old ISP and H264 is in the old +bridge, but since we have no consumers of it I've just done the +minimum to get V3D working. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/mfd/bcm2835-pm.c | 11 +++++++++++ + drivers/soc/bcm/bcm2835-power.c | 22 ++++++++++++++++++++++ + include/linux/mfd/bcm2835-pm.h | 1 + + 3 files changed, 34 insertions(+) + +--- a/drivers/mfd/bcm2835-pm.c ++++ b/drivers/mfd/bcm2835-pm.c +@@ -50,6 +50,17 @@ static int bcm2835_pm_probe(struct platf + if (ret) + return ret; + ++ /* Map the ARGON ASB regs if present. */ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 2); ++ if (res) { ++ pm->arg_asb = devm_ioremap_resource(dev, res); ++ if (IS_ERR(pm->arg_asb)) { ++ dev_err(dev, "Failed to map ARGON ASB: %ld\n", ++ PTR_ERR(pm->arg_asb)); ++ return PTR_ERR(pm->arg_asb); ++ } ++ } ++ + /* We'll use the presence of the AXI ASB regs in the + * bcm2835-pm binding as the key for whether we can reference + * the full PM register range and support power domains. +--- a/drivers/soc/bcm/bcm2835-power.c ++++ b/drivers/soc/bcm/bcm2835-power.c +@@ -143,6 +143,8 @@ struct bcm2835_power { + /* AXI Async bridge registers. */ + void __iomem *asb; + ++ bool is_2711; ++ + struct genpd_onecell_data pd_xlate; + struct bcm2835_power_domain domains[BCM2835_POWER_DOMAIN_COUNT]; + struct reset_controller_dev reset; +@@ -192,6 +194,10 @@ static int bcm2835_power_power_off(struc + { + struct bcm2835_power *power = pd->power; + ++ /* 2711 has no power domains above the reset controller. */ ++ if (power->is_2711) ++ return 0; ++ + /* Enable functional isolation */ + PM_WRITE(pm_reg, PM_READ(pm_reg) & ~PM_ISFUNC); + +@@ -213,6 +219,10 @@ static int bcm2835_power_power_on(struct + int inrush; + bool powok; + ++ /* 2711 has no power domains above the reset controller. */ ++ if (power->is_2711) ++ return 0; ++ + /* If it was already powered on by the fw, leave it that way. */ + if (PM_READ(pm_reg) & PM_POWUP) + return 0; +@@ -627,6 +637,18 @@ static int bcm2835_power_probe(struct pl + power->base = pm->base; + power->asb = pm->asb; + ++ /* 2711 hack: the new ARGON ASB took over V3D, which is our ++ * only consumer of this driver so far. The old ASB seems to ++ * still be present with ISP and H264 bits but no V3D, but I ++ * don't know if that's real or not. The V3D is in the same ++ * place in the new ASB as the old one, so just poke the new ++ * one for now. ++ */ ++ if (pm->arg_asb) { ++ power->asb = pm->arg_asb; ++ power->is_2711 = true; ++ } ++ + id = ASB_READ(ASB_AXI_BRDG_ID); + if (id != 0x62726467 /* "BRDG" */) { + dev_err(dev, "ASB register ID returned 0x%08x\n", id); +--- a/include/linux/mfd/bcm2835-pm.h ++++ b/include/linux/mfd/bcm2835-pm.h +@@ -9,6 +9,7 @@ struct bcm2835_pm { + struct device *dev; + void __iomem *base; + void __iomem *asb; ++ void __iomem *arg_asb; + }; + + #endif /* BCM2835_MFD_PM_H */ |