diff options
| author | Thierry Reding <treding@nvidia.com> | 2019-04-15 11:32:25 +0200 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2019-06-05 09:16:34 -0700 |
| commit | f9ec2ec8504aa5d94d5be7f43c743040e549b157 (patch) | |
| tree | 7c68e815ecd3606853e85c899917ee3c95e91942 /arch/arm/mach-tegra/powergate.c | |
| parent | 147fac6aef043b41a48b3ad87639c6872da298f1 (diff) | |
ARM: tegra: Support TZ-only access to PMC
Some devices may restrict access to the PMC to TrustZone software only.
Non-TZ software can detect this and use SMC calls to the firmware that
runs in the TrustZone to perform accesses to PMC registers.
Note that this also fixes reset_cpu() and the enterrcm command on
Tegra186 where they were previously trying to access the PMC at a wrong
physical address.
Based on work by Kalyani Chidambaram <kalyanic@nvidia.com> and Tom
Warren <twarren@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/powergate.c')
| -rw-r--r-- | arch/arm/mach-tegra/powergate.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c index e45f0961b24..761c9ef19e3 100644 --- a/arch/arm/mach-tegra/powergate.c +++ b/arch/arm/mach-tegra/powergate.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2014-2019, NVIDIA CORPORATION. All rights reserved. */ #include <common.h> @@ -11,6 +11,7 @@ #include <asm/arch/powergate.h> #include <asm/arch/tegra.h> +#include <asm/arch-tegra/pmc.h> #define PWRGATE_TOGGLE 0x30 #define PWRGATE_TOGGLE_START (1 << 8) @@ -24,18 +25,18 @@ static int tegra_powergate_set(enum tegra_powergate id, bool state) u32 value, mask = state ? (1 << id) : 0, old_mask; unsigned long start, timeout = 25; - value = readl(NV_PA_PMC_BASE + PWRGATE_STATUS); + value = tegra_pmc_readl(PWRGATE_STATUS); old_mask = value & (1 << id); if (mask == old_mask) return 0; - writel(PWRGATE_TOGGLE_START | id, NV_PA_PMC_BASE + PWRGATE_TOGGLE); + tegra_pmc_writel(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE); start = get_timer(0); while (get_timer(start) < timeout) { - value = readl(NV_PA_PMC_BASE + PWRGATE_STATUS); + value = tegra_pmc_readl(PWRGATE_STATUS); if ((value & (1 << id)) == mask) return 0; } @@ -69,7 +70,7 @@ static int tegra_powergate_remove_clamping(enum tegra_powergate id) else value = 1 << id; - writel(value, NV_PA_PMC_BASE + REMOVE_CLAMPING); + tegra_pmc_writel(value, REMOVE_CLAMPING); return 0; } |