1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2016 Google, Inc
9 #include <asm/arch/scu_ast2500.h>
11 int ast_get_clk(struct udevice **devp)
13 return uclass_get_device_by_driver(UCLASS_CLK,
14 DM_GET_DRIVER(aspeed_ast2500_scu), devp);
17 void *ast_get_scu(void)
19 struct ast2500_clk_priv *priv;
23 ret = ast_get_clk(&dev);
27 priv = dev_get_priv(dev);
32 void ast_scu_unlock(struct ast2500_scu *scu)
34 writel(SCU_UNLOCK_VALUE, &scu->protection_key);
35 while (!readl(&scu->protection_key))
39 void ast_scu_lock(struct ast2500_scu *scu)
41 writel(~SCU_UNLOCK_VALUE, &scu->protection_key);
42 while (readl(&scu->protection_key))