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