diff options
| author | Simon Glass <sjg@chromium.org> | 2015-06-05 14:39:38 -0600 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2015-06-09 09:56:14 -0700 |
| commit | 701b7b1d2cf657d435d2bd6caf43d0247d37220d (patch) | |
| tree | cfe96111de110583a53d7aaed19050a00c3f6bbe /arch/arm/mach-tegra/powergate.c | |
| parent | cd3c67692b13fb24f69b3016bc9990eeaaa32ca1 (diff) | |
| download | u-boot-701b7b1d2cf657d435d2bd6caf43d0247d37220d.tar.gz | |
tegra: Introduce SRAM repair on tegra124
This is required in order to avoid instability when running from caches
after the kernel starts.
Signed-off-by: Simon Glass <sjg@chromium.org>
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 | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c index 6331cd40fd..30ae036bff 100644 --- a/arch/arm/mach-tegra/powergate.c +++ b/arch/arm/mach-tegra/powergate.c @@ -9,7 +9,7 @@ #include <asm/io.h> #include <asm/types.h> - +#include <asm/arch/flow.h> #include <asm/arch/powergate.h> #include <asm/arch/tegra.h> @@ -75,11 +75,29 @@ static int tegra_powergate_remove_clamping(enum tegra_powergate id) return 0; } +static void tegra_powergate_ram_repair(void) +{ +#ifdef CONFIG_TEGRA124 + struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE; + + /* Request RAM repair for cluster 0 and wait until complete */ + setbits_le32(&flow->ram_repair, RAM_REPAIR_REQ); + while (!(readl(&flow->ram_repair) & RAM_REPAIR_STS)) + ; + + /* Same for cluster 1 */ + setbits_le32(&flow->ram_repair_cluster1, RAM_REPAIR_REQ); + while (!(readl(&flow->ram_repair_cluster1) & RAM_REPAIR_STS)) + ; +#endif +} + int tegra_powergate_sequence_power_up(enum tegra_powergate id, enum periph_id periph) { int err; + tegra_powergate_ram_repair(); reset_set_enable(periph, 1); err = tegra_powergate_power_on(id); |