From 64ce2fbd6c9ebb68e274ae1b3c449e1cae86c5b6 Mon Sep 17 00:00:00 2001 From: Tom Rini Date: Thu, 5 Jun 2014 11:15:28 -0400 Subject: [PATCH] arm:am33xx: Add a scale_vcores() hook Similar to OMAP4/5 we need to scale the voltage up prior to changing the clock frequencies up higher. Add a similar hook to start with. Signed-off-by: Tom Rini --- arch/arm/cpu/armv7/am33xx/clock.c | 11 +++++++++++ arch/arm/include/asm/arch-am33xx/clock.h | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm/cpu/armv7/am33xx/clock.c b/arch/arm/cpu/armv7/am33xx/clock.c index 0672798fe0..ec7d46838b 100644 --- a/arch/arm/cpu/armv7/am33xx/clock.c +++ b/arch/arm/cpu/armv7/am33xx/clock.c @@ -170,8 +170,19 @@ void do_enable_clocks(u32 *const *clk_domains, }; } +/* + * Before scaling up the clocks we need to have the PMIC scale up the + * voltages first. This will be dependent on which PMIC is in use + * and in some cases we may not be scaling things up at all and thus not + * need to do anything here. + */ +__weak void scale_vcores(void) +{ +} + void prcm_init() { enable_basic_clocks(); + scale_vcores(); setup_dplls(); } diff --git a/arch/arm/include/asm/arch-am33xx/clock.h b/arch/arm/include/asm/arch-am33xx/clock.h index f00fad38fe..4af6b57e42 100644 --- a/arch/arm/include/asm/arch-am33xx/clock.h +++ b/arch/arm/include/asm/arch-am33xx/clock.h @@ -107,6 +107,7 @@ const struct dpll_params *get_dpll_mpu_params(void); const struct dpll_params *get_dpll_core_params(void); const struct dpll_params *get_dpll_per_params(void); const struct dpll_params *get_dpll_ddr_params(void); +void scale_vcores(void); void do_setup_dpll(const struct dpll_regs *, const struct dpll_params *); void prcm_init(void); void enable_basic_clocks(void); -- 2.39.2