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 <trini@ti.com>
diff --git a/arch/arm/cpu/armv7/am33xx/clock.c b/arch/arm/cpu/armv7/am33xx/clock.c
index 0672798..ec7d468 100644
--- a/arch/arm/cpu/armv7/am33xx/clock.c
+++ b/arch/arm/cpu/armv7/am33xx/clock.c
@@ -170,8 +170,19 @@
};
}
+/*
+ * 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 f00fad3..4af6b57 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_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);