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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Google, Inc
*/
#include <common.h>
#include <dm.h>
#include <asm/io.h>
#include <asm/arch/scu_ast2500.h>
#include <linux/err.h>
int ast_get_clk(struct udevice **devp)
{
return uclass_get_device_by_driver(UCLASS_CLK,
DM_GET_DRIVER(aspeed_ast2500_scu), devp);
}
void *ast_get_scu(void)
{
struct ast2500_clk_priv *priv;
struct udevice *dev;
int ret;
ret = ast_get_clk(&dev);
if (ret)
return ERR_PTR(ret);
priv = dev_get_priv(dev);
return priv->scu;
}
void ast_scu_unlock(struct ast2500_scu *scu)
{
writel(SCU_UNLOCK_VALUE, &scu->protection_key);
while (!readl(&scu->protection_key))
;
}
void ast_scu_lock(struct ast2500_scu *scu)
{
writel(~SCU_UNLOCK_VALUE, &scu->protection_key);
while (readl(&scu->protection_key))
;
}
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