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arm:am33xx: Add a scale_vcores() hook

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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 <trini@ti.com>
This commit is contained in:
Tom Rini 2014-06-05 11:15:28 -04:00
parent feca6e676e
commit 64ce2fbd6c
2 changed files with 12 additions and 0 deletions
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11
arch/arm/cpu/armv7/am33xx/clock.c
View file

@ -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() void prcm_init()
{ {
enable_basic_clocks(); enable_basic_clocks();
scale_vcores();
setup_dplls(); setup_dplls();
} }

1
arch/arm/include/asm/arch-am33xx/clock.h
View file

@ -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_core_params(void);
const struct dpll_params *get_dpll_per_params(void); const struct dpll_params *get_dpll_per_params(void);
const struct dpll_params *get_dpll_ddr_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 do_setup_dpll(const struct dpll_regs *, const struct dpll_params *);
void prcm_init(void); void prcm_init(void);
void enable_basic_clocks(void); void enable_basic_clocks(void);