diff options
Diffstat (limited to 'arch/arm/mach-aspeed/ast2500/clk_ast2500.c')
| -rw-r--r-- | arch/arm/mach-aspeed/ast2500/clk_ast2500.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-aspeed/ast2500/clk_ast2500.c b/arch/arm/mach-aspeed/ast2500/clk_ast2500.c index 079909f..30cfac1 100644 --- a/arch/arm/mach-aspeed/ast2500/clk_ast2500.c +++ b/arch/arm/mach-aspeed/ast2500/clk_ast2500.c @@ -6,6 +6,7 @@ #include <common.h> #include <dm.h> +#include <asm/io.h> #include <asm/arch/scu_ast2500.h> int ast_get_clk(struct udevice **devp) @@ -28,3 +29,17 @@ void *ast_get_scu(void) return priv->scu; } + +void ast_scu_unlock(struct ast2500_scu *scu) +{ + writel(SCU_UNLOCK_VALUE, &scu->protection_key); + while (!readl(&scu->protection_key)) + ; +} + +void ast_scu_lock(struct ast2500_scu *scu) +{ + writel(~SCU_UNLOCK_VALUE, &scu->protection_key); + while (readl(&scu->protection_key)) + ; +} |