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>

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>
Tom Rini
1 parent feca6e676e
Showing 2 changed files with 12 additions and 0 deletions Side-by-side Diff
arch/arm/cpu/armv7/am33xx/clock.c
arch/arm/include/asm/arch-am33xx/clock.h
@@ -170,9 +170,20 @@
 	};
 }
  
+/*
+ * 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();
 }
@@ -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);
...	...	@@ -170,9 +170,20 @@
170	170	};
171	171	}
172	172
	173	+/*
	174	+ * Before scaling up the clocks we need to have the PMIC scale up the
	175	+ * voltages first. This will be dependent on which PMIC is in use
	176	+ * and in some cases we may not be scaling things up at all and thus not
	177	+ * need to do anything here.
	178	+ */
	179	+__weak void scale_vcores(void)
	180	+{
	181	+}
	182	+
173	183	void prcm_init()
174	184	{
175	185	enable_basic_clocks();
	186	+ scale_vcores();
176	187	setup_dplls();
177	188	}
...	...	@@ -107,6 +107,7 @@
107	107	const struct dpll_params *get_dpll_core_params(void);
108	108	const struct dpll_params *get_dpll_per_params(void);
109	109	const struct dpll_params *get_dpll_ddr_params(void);
	110	+void scale_vcores(void);
110	111	void do_setup_dpll(const struct dpll_regs , const struct dpll_params );
111	112	void prcm_init(void);
112	113	void enable_basic_clocks(void);