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| author | Peter De Schrijver <pdeschrijver@nvidia.com> | 2012-02-10 00:47:46 +0100 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-02-26 23:44:44 +0100 |
| commit | 8f5d6f1b46df37ad3eea8f4e09bbe4bbe1bfc6c3 (patch) | |
| tree | 9d1b06a25856a250f69e8932eafbd25f57d2edcb /arch/arm/mach-tegra/powergate.c | |
| parent | ARM: tegra: rework Tegra secondary CPU core bringup (diff) | |
| download | linux-8f5d6f1b46df37ad3eea8f4e09bbe4bbe1bfc6c3.tar.xz linux-8f5d6f1b46df37ad3eea8f4e09bbe4bbe1bfc6c3.zip | |
ARM: tegra: prepare powergate.c for multiple variants
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>
Diffstat (limited to 'arch/arm/mach-tegra/powergate.c')
| -rw-r--r-- | arch/arm/mach-tegra/powergate.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c index 948306491a59..9b828f2ed2b6 100644 --- a/arch/arm/mach-tegra/powergate.c +++ b/arch/arm/mach-tegra/powergate.c @@ -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; |