1 /* 2 * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com> 3 * 4 * Derived from linux/arch/mips/bcm63xx/clk.c: 5 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <clk-uclass.h> 12 #include <dm.h> 13 #include <errno.h> 14 #include <asm/io.h> 15 16 #define MAX_CLKS 32 17 18 struct bcm6345_clk_priv { 19 void __iomem *regs; 20 }; 21 22 static int bcm6345_clk_enable(struct clk *clk) 23 { 24 struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev); 25 26 if (clk->id >= MAX_CLKS) 27 return -EINVAL; 28 29 setbits_be32(priv->regs, BIT(clk->id)); 30 31 return 0; 32 } 33 34 static int bcm6345_clk_disable(struct clk *clk) 35 { 36 struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev); 37 38 if (clk->id >= MAX_CLKS) 39 return -EINVAL; 40 41 clrbits_be32(priv->regs, BIT(clk->id)); 42 43 return 0; 44 } 45 46 static struct clk_ops bcm6345_clk_ops = { 47 .disable = bcm6345_clk_disable, 48 .enable = bcm6345_clk_enable, 49 }; 50 51 static const struct udevice_id bcm6345_clk_ids[] = { 52 { .compatible = "brcm,bcm6345-clk" }, 53 { /* sentinel */ } 54 }; 55 56 static int bcm63xx_clk_probe(struct udevice *dev) 57 { 58 struct bcm6345_clk_priv *priv = dev_get_priv(dev); 59 fdt_addr_t addr; 60 fdt_size_t size; 61 62 addr = devfdt_get_addr_size_index(dev, 0, &size); 63 if (addr == FDT_ADDR_T_NONE) 64 return -EINVAL; 65 66 priv->regs = ioremap(addr, size); 67 68 return 0; 69 } 70 71 U_BOOT_DRIVER(clk_bcm6345) = { 72 .name = "clk_bcm6345", 73 .id = UCLASS_CLK, 74 .of_match = bcm6345_clk_ids, 75 .ops = &bcm6345_clk_ops, 76 .probe = bcm63xx_clk_probe, 77 .priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv), 78 }; 79