diff options
Diffstat (limited to 'board/google/veyron/veyron.c')
| -rw-r--r-- | board/google/veyron/veyron.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/board/google/veyron/veyron.c b/board/google/veyron/veyron.c index 19edb18a66..dd2c014c60 100644 --- a/board/google/veyron/veyron.c +++ b/board/google/veyron/veyron.c @@ -3,10 +3,93 @@ * (C) Copyright 2015 Google, Inc */ +#include <clk.h> #include <common.h> +#include <dm.h> +#include <asm/arch-rockchip/clock.h> +#include <dt-bindings/clock/rk3288-cru.h> +#include <power/regulator.h> /* * We should increase the DDR voltage to 1.2V using the PWM regulator. * There is a U-Boot driver for this but it may need to add support for the * 'voltage-table' property. */ +#ifndef CONFIG_SPL_BUILD +#if !CONFIG_IS_ENABLED(ROCKCHIP_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) { + debug("Cannot set regulator name\n"); + 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; + + ret = regulator_get_by_platname("vcc33_sd", &dev); + if (ret) { + debug("Cannot get regulator name\n"); + return ret; + } + + ret = regulator_set_value(dev, 3300000); + if (ret) + return ret; + + ret = regulators_enable_boot_on(false); + if (ret) { + debug("%s: Cannot enable boot on regulators\n", __func__); + return ret; + } + + return 0; +} +#endif + +int board_early_init_f(void) +{ + struct udevice *dev; + int ret; + +#if !CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM) + if (!fdt_node_check_compatible(gd->fdt_blob, 0, "google,veyron")) { + ret = veyron_init(); + if (ret) + return ret; + } +#endif + /* + * This init is done in SPL, but when chain-loading U-Boot SPL will + * have been skipped. Allow the clock driver to check if it needs + * setting up. + */ + ret = rockchip_get_clk(&dev); + if (ret) { + debug("CLK init failed: %d\n", ret); + return ret; + } + + return 0; +} +#endif |