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// SPDX-License-Identifier: GPL-2.0+
/*
* (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 <linux/err.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
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