diff mbox

[U-Boot,2/4] arm:am33xx: Add a scale_vcores() hook

Message ID 1401981330-25101-2-git-send-email-trini@ti.com
State Accepted
Delegated to: Tom Rini
Headers show

Commit Message

Tom Rini June 5, 2014, 3:15 p.m. UTC 
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>
---
 arch/arm/cpu/armv7/am33xx/clock.c        |   11 +++++++++++
 arch/arm/include/asm/arch-am33xx/clock.h |    1 +
 2 files changed, 12 insertions(+)

Comments

Tom Rini June 6, 2014, 9:56 p.m. UTC | #1 
On Thu, Jun 05, 2014 at 11:15:28AM -0400, Tom Rini wrote:

> 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>

Applied to u-boot-ti/master, thanks!
diff mbox

Patch

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 @@  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 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_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);