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Diffstat (limited to 'arch/arm/mach-tegra/powergate.c')
-rw-r--r--arch/arm/mach-tegra/powergate.c280
1 files changed, 0 insertions, 280 deletions
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c
deleted file mode 100644
index f076f0f80fcd..000000000000
--- a/arch/arm/mach-tegra/powergate.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/*
- * drivers/powergate/tegra-powergate.c
- *
- * Copyright (c) 2010 Google, Inc
- *
- * Author:
- * Colin Cross <ccross@google.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/clk.h>
-#include <linux/debugfs.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/export.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/seq_file.h>
-#include <linux/spinlock.h>
-#include <linux/clk/tegra.h>
-#include <linux/tegra-powergate.h>
-
-#include "fuse.h"
-#include "iomap.h"
-
-#define PWRGATE_TOGGLE 0x30
-#define PWRGATE_TOGGLE_START (1 << 8)
-
-#define REMOVE_CLAMPING 0x34
-
-#define PWRGATE_STATUS 0x38
-
-static int tegra_num_powerdomains;
-static int tegra_num_cpu_domains;
-static u8 *tegra_cpu_domains;
-static u8 tegra30_cpu_domains[] = {
- TEGRA_POWERGATE_CPU0,
- TEGRA_POWERGATE_CPU1,
- TEGRA_POWERGATE_CPU2,
- TEGRA_POWERGATE_CPU3,
-};
-
-static DEFINE_SPINLOCK(tegra_powergate_lock);
-
-static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
-
-static u32 pmc_read(unsigned long reg)
-{
- return readl(pmc + reg);
-}
-
-static void pmc_write(u32 val, unsigned long reg)
-{
- writel(val, pmc + reg);
-}
-
-static int tegra_powergate_set(int id, bool new_state)
-{
- bool status;
- unsigned long flags;
-
- spin_lock_irqsave(&tegra_powergate_lock, flags);
-
- status = pmc_read(PWRGATE_STATUS) & (1 << id);
-
- if (status == new_state) {
- spin_unlock_irqrestore(&tegra_powergate_lock, flags);
- return 0;
- }
-
- pmc_write(PWRGATE_TOGGLE_START | id, PWRGATE_TOGGLE);
-
- spin_unlock_irqrestore(&tegra_powergate_lock, flags);
-
- return 0;
-}
-
-int tegra_powergate_power_on(int id)
-{
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- return tegra_powergate_set(id, true);
-}
-
-int tegra_powergate_power_off(int id)
-{
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- return tegra_powergate_set(id, false);
-}
-
-int tegra_powergate_is_powered(int id)
-{
- u32 status;
-
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- status = pmc_read(PWRGATE_STATUS) & (1 << id);
- return !!status;
-}
-
-int tegra_powergate_remove_clamping(int id)
-{
- u32 mask;
-
- if (id < 0 || id >= tegra_num_powerdomains)
- return -EINVAL;
-
- /*
- * Tegra 2 has a bug where PCIE and VDE clamping masks are
- * swapped relatively to the partition ids
- */
- if (id == TEGRA_POWERGATE_VDEC)
- mask = (1 << TEGRA_POWERGATE_PCIE);
- else if (id == TEGRA_POWERGATE_PCIE)
- mask = (1 << TEGRA_POWERGATE_VDEC);
- else
- mask = (1 << id);
-
- pmc_write(mask, REMOVE_CLAMPING);
-
- return 0;
-}
-
-/* Must be called with clk disabled, and returns with clk enabled */
-int tegra_powergate_sequence_power_up(int id, struct clk *clk)
-{
- int ret;
-
- tegra_periph_reset_assert(clk);
-
- ret = tegra_powergate_power_on(id);
- if (ret)
- goto err_power;
-
- ret = clk_prepare_enable(clk);
- if (ret)
- goto err_clk;
-
- udelay(10);
-
- ret = tegra_powergate_remove_clamping(id);
- if (ret)
- goto err_clamp;
-
- udelay(10);
- tegra_periph_reset_deassert(clk);
-
- return 0;
-
-err_clamp:
- clk_disable_unprepare(clk);
-err_clk:
- tegra_powergate_power_off(id);
-err_power:
- return ret;
-}
-EXPORT_SYMBOL(tegra_powergate_sequence_power_up);
-
-int tegra_cpu_powergate_id(int cpuid)
-{
- if (cpuid > 0 && cpuid < tegra_num_cpu_domains)
- return tegra_cpu_domains[cpuid];
-
- return -EINVAL;
-}
-
-int __init tegra_powergate_init(void)
-{
- switch (tegra_chip_id) {
- case TEGRA20:
- tegra_num_powerdomains = 7;
- break;
- case TEGRA30:
- tegra_num_powerdomains = 14;
- tegra_num_cpu_domains = 4;
- tegra_cpu_domains = tegra30_cpu_domains;
- break;
- default:
- /* Unknown Tegra variant. Disable powergating */
- tegra_num_powerdomains = 0;
- break;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_DEBUG_FS
-
-static const char * const *powergate_name;
-
-static const char * const powergate_name_t20[] = {
- [TEGRA_POWERGATE_CPU] = "cpu",
- [TEGRA_POWERGATE_3D] = "3d",
- [TEGRA_POWERGATE_VENC] = "venc",
- [TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_PCIE] = "pcie",
- [TEGRA_POWERGATE_L2] = "l2",
- [TEGRA_POWERGATE_MPE] = "mpe",
-};
-
-static const char * const powergate_name_t30[] = {
- [TEGRA_POWERGATE_CPU] = "cpu0",
- [TEGRA_POWERGATE_3D] = "3d0",
- [TEGRA_POWERGATE_VENC] = "venc",
- [TEGRA_POWERGATE_VDEC] = "vdec",
- [TEGRA_POWERGATE_PCIE] = "pcie",
- [TEGRA_POWERGATE_L2] = "l2",
- [TEGRA_POWERGATE_MPE] = "mpe",
- [TEGRA_POWERGATE_HEG] = "heg",
- [TEGRA_POWERGATE_SATA] = "sata",
- [TEGRA_POWERGATE_CPU1] = "cpu1",
- [TEGRA_POWERGATE_CPU2] = "cpu2",
- [TEGRA_POWERGATE_CPU3] = "cpu3",
- [TEGRA_POWERGATE_CELP] = "celp",
- [TEGRA_POWERGATE_3D1] = "3d1",
-};
-
-static int powergate_show(struct seq_file *s, void *data)
-{
- int i;
-
- seq_printf(s, " powergate powered\n");
- seq_printf(s, "------------------\n");
-
- for (i = 0; i < tegra_num_powerdomains; i++)
- seq_printf(s, " %9s %7s\n", powergate_name[i],
- tegra_powergate_is_powered(i) ? "yes" : "no");
- return 0;
-}
-
-static int powergate_open(struct inode *inode, struct file *file)
-{
- return single_open(file, powergate_show, inode->i_private);
-}
-
-static const struct file_operations powergate_fops = {
- .open = powergate_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-int __init tegra_powergate_debugfs_init(void)
-{
- struct dentry *d;
-
- switch (tegra_chip_id) {
- case TEGRA20:
- powergate_name = powergate_name_t20;
- break;
- case TEGRA30:
- powergate_name = powergate_name_t30;
- break;
- }
-
- if (powergate_name) {
- d = debugfs_create_file("powergate", S_IRUGO, NULL, NULL,
- &powergate_fops);
- if (!d)
- return -ENOMEM;
- }
-
- return 0;
-}
-
-#endif
generated by cgit (git 2.34.1) at 2025-12-25 14:18:47 +0000