From 701b7b1d2cf657d435d2bd6caf43d0247d37220d Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 5 Jun 2015 14:39:38 -0600 Subject: 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 Signed-off-by: Tom Warren --- arch/arm/mach-tegra/powergate.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-tegra/powergate.c') diff --git a/arch/arm/mach-tegra/powergate.c b/arch/arm/mach-tegra/powergate.c index 6331cd4..30ae036 100644 --- a/arch/arm/mach-tegra/powergate.c +++ b/arch/arm/mach-tegra/powergate.c @@ -9,7 +9,7 @@ #include #include - +#include #include #include @@ -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); -- cgit v1.1