diff options
Diffstat (limited to 'arch/arm/cpu/tegra-common/powergate.c')
-rw-r--r-- | arch/arm/cpu/tegra-common/powergate.c | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/arch/arm/cpu/tegra-common/powergate.c b/arch/arm/cpu/tegra-common/powergate.c deleted file mode 100644 index 439cff3..0000000 --- a/arch/arm/cpu/tegra-common/powergate.c +++ /dev/null @@ -1,102 +0,0 @@ -/* - * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. - * - * SPDX-License-Identifier: GPL-2.0 - */ - -#include <common.h> -#include <errno.h> - -#include <asm/io.h> -#include <asm/types.h> - -#include <asm/arch/powergate.h> -#include <asm/arch/tegra.h> - -#define PWRGATE_TOGGLE 0x30 -#define PWRGATE_TOGGLE_START (1 << 8) - -#define REMOVE_CLAMPING 0x34 - -#define PWRGATE_STATUS 0x38 - -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); - old_mask = value & (1 << id); - - if (mask == old_mask) - return 0; - - writel(PWRGATE_TOGGLE_START | id, NV_PA_PMC_BASE + PWRGATE_TOGGLE); - - start = get_timer(0); - - while (get_timer(start) < timeout) { - value = readl(NV_PA_PMC_BASE + PWRGATE_STATUS); - if ((value & (1 << id)) == mask) - return 0; - } - - return -ETIMEDOUT; -} - -static int tegra_powergate_power_on(enum tegra_powergate id) -{ - return tegra_powergate_set(id, true); -} - -int tegra_powergate_power_off(enum tegra_powergate id) -{ - return tegra_powergate_set(id, false); -} - -static int tegra_powergate_remove_clamping(enum tegra_powergate id) -{ - unsigned long value; - - /* - * The REMOVE_CLAMPING register has the bits for the PCIE and VDEC - * partitions reversed. This was originally introduced on Tegra20 but - * has since been carried forward for backwards-compatibility. - */ - if (id == TEGRA_POWERGATE_VDEC) - value = 1 << TEGRA_POWERGATE_PCIE; - else if (id == TEGRA_POWERGATE_PCIE) - value = 1 << TEGRA_POWERGATE_VDEC; - else - value = 1 << id; - - writel(value, NV_PA_PMC_BASE + REMOVE_CLAMPING); - - return 0; -} - -int tegra_powergate_sequence_power_up(enum tegra_powergate id, - enum periph_id periph) -{ - int err; - - reset_set_enable(periph, 1); - - err = tegra_powergate_power_on(id); - if (err < 0) - return err; - - clock_enable(periph); - - udelay(10); - - err = tegra_powergate_remove_clamping(id); - if (err < 0) - return err; - - udelay(10); - - reset_set_enable(periph, 0); - - return 0; -} |