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rockchip: veyron: Adjust ARM clock after relocation 

Update board_init() to increase the ARM clock to the maximum speed on
veyron boards. This makes quite a large difference in performance. With
this change, speed goes from about 750 DMIPS to 2720 DMIPs.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2016-11-13 14:22:14 -07:00
parent 3a8a42d955
commit 20b13e8d7e
1 changed files with 44 additions and 0 deletions
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44
arch/arm/mach-rockchip/rk3288-board.c
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@ -16,6 +16,8 @@
#include <asm/arch/boot_mode.h>
#include <asm/gpio.h>
#include <dm/pinctrl.h>
#include <dt-bindings/clock/rk3288-cru.h>
#include <power/regulator.h>
DECLARE_GLOBAL_DATA_PTR;
@ -56,6 +58,39 @@ int board_late_init(void)
return rk_board_late_init();
}
#ifndef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
static int veyron_init(void)
{
struct udevice *dev;
struct clk clk;
int ret;
ret = regulator_get_by_platname("vdd_arm", &dev);
if (ret)
return ret;
/* Slowly raise to max CPU voltage to prevent overshoot */
ret = regulator_set_value(dev, 1200000);
if (ret)
return ret;
udelay(175); /* Must wait for voltage to stabilize, 2mV/us */
ret = regulator_set_value(dev, 1400000);
if (ret)
return ret;
udelay(100); /* Must wait for voltage to stabilize, 2mV/us */
ret = rockchip_get_clk(&clk.dev);
if (ret)
return ret;
clk.id = PLL_APLL;
ret = clk_set_rate(&clk, 1800000000);
if (IS_ERR_VALUE(ret))
return ret;
return 0;
}
#endif
int board_init(void)
{
#ifdef CONFIG_ROCKCHIP_SPL_BACK_TO_BROM
@ -87,6 +122,15 @@ err:
return -1;
#else
int ret;
/* We do some SoC one time setting here */
if (!fdt_node_check_compatible(gd->fdt_blob, 0, "google,veyron")) {
ret = veyron_init();
if (ret)
return ret;
}
return 0;
#endif
}