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ARM: tegra: prepare powergate.c for multiple variants

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Prepare the powergating code for other Tegra variants which have a different
number of powerdomains.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Peter De Schrijver 2012-02-10 01:47:46 +02:00 committed by Olof Johansson
parent b36ab9754e
commit 8f5d6f1b46
2 changed files with 27 additions and 7 deletions
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1
arch/arm/mach-tegra/include/mach/powergate.h
View File

@ -27,7 +27,6 @@
#define TEGRA_POWERGATE_VDEC 4
#define TEGRA_POWERGATE_L2 5
#define TEGRA_POWERGATE_MPE 6
#define TEGRA_NUM_POWERGATE 7
int tegra_powergate_power_on(int id);
int tegra_powergate_power_off(int id);

33
arch/arm/mach-tegra/powergate.c
View File

@ -31,6 +31,8 @@
#include <mach/iomap.h>
#include <mach/powergate.h>
#include "fuse.h"
#define PWRGATE_TOGGLE 0x30
#define PWRGATE_TOGGLE_START (1 << 8)
@ -38,6 +40,8 @@
#define PWRGATE_STATUS 0x38
static int tegra_num_powerdomains;
static DEFINE_SPINLOCK(tegra_powergate_lock);
static void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
@ -75,7 +79,7 @@ static int tegra_powergate_set(int id, bool new_state)
int tegra_powergate_power_on(int id)
{
if (id < 0 || id >= TEGRA_NUM_POWERGATE)
if (id < 0 || id >= tegra_num_powerdomains)
return -EINVAL;
return tegra_powergate_set(id, true);
@ -83,17 +87,18 @@ int tegra_powergate_power_on(int id)
int tegra_powergate_power_off(int id)
{
if (id < 0 || id >= TEGRA_NUM_POWERGATE)
if (id < 0 || id >= tegra_num_powerdomains)
return -EINVAL;
return tegra_powergate_set(id, false);
}
static bool tegra_powergate_is_powered(int id)
static int tegra_powergate_is_powered(int id)
{
u32 status;
WARN_ON(id < 0 || id >= TEGRA_NUM_POWERGATE);
if (id < 0 || id >= tegra_num_powerdomains)
return -EINVAL;
status = pmc_read(PWRGATE_STATUS) & (1 << id);
return !!status;
@ -103,7 +108,7 @@ int tegra_powergate_remove_clamping(int id)
{
u32 mask;
if (id < 0 || id >= TEGRA_NUM_POWERGATE)
if (id < 0 || id >= tegra_num_powerdomains)
return -EINVAL;
/*
@ -156,6 +161,22 @@ err_power:
return ret;
}
int __init tegra_powergate_init(void)
{
switch (tegra_chip_id) {
case TEGRA20:
tegra_num_powerdomains = 7;
break;
default:
/* Unknown Tegra variant. Disable powergating */
tegra_num_powerdomains = 0;
break;
}
return 0;
}
arch_initcall(tegra_powergate_init);
#ifdef CONFIG_DEBUG_FS
static const char * const powergate_name[] = {
@ -175,7 +196,7 @@ static int powergate_show(struct seq_file *s, void *data)
seq_printf(s, " powergate powered\n");
seq_printf(s, "------------------\n");
for (i = 0; i < TEGRA_NUM_POWERGATE; i++)
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;