2 * Clock tree for CSR SiRFatlasVI
4 * Copyright (c) 2011 - 2014 Cambridge Silicon Radio Limited, a CSR plc group
7 * Licensed under GPLv2 or later.
10 #include <linux/module.h>
11 #include <linux/bitops.h>
13 #include <linux/clkdev.h>
14 #include <linux/clk-provider.h>
15 #include <linux/of_address.h>
16 #include <linux/syscore_ops.h>
19 #include "clk-common.c"
21 static struct clk_dmn clk_mmc01 = {
22 .regofs = SIRFSOC_CLKC_MMC01_CFG,
25 .init = &clk_mmc01_init,
29 static struct clk_dmn clk_mmc23 = {
30 .regofs = SIRFSOC_CLKC_MMC23_CFG,
33 .init = &clk_mmc23_init,
37 static struct clk_dmn clk_mmc45 = {
38 .regofs = SIRFSOC_CLKC_MMC45_CFG,
41 .init = &clk_mmc45_init,
45 static struct clk_init_data clk_nand_init = {
48 .parent_names = dmn_clk_parents,
49 .num_parents = ARRAY_SIZE(dmn_clk_parents),
52 static struct clk_dmn clk_nand = {
53 .regofs = SIRFSOC_CLKC_NAND_CFG,
56 .init = &clk_nand_init,
60 enum atlas6_clk_index {
61 /* 0 1 2 3 4 5 6 7 8 9 */
62 rtc, osc, pll1, pll2, pll3, mem, sys, security, dsp, gps,
63 mf, io, cpu, uart0, uart1, uart2, tsc, i2c0, i2c1, spi0,
64 spi1, pwmc, efuse, pulse, dmac0, dmac1, nand, audio, usp0, usp1,
65 usp2, vip, gfx, gfx2d, lcd, vpp, mmc01, mmc23, mmc45, usbpll,
66 usb0, usb1, cphif, maxclk,
69 static __initdata struct clk_hw *atlas6_clk_hw_array[maxclk] = {
115 static struct clk *atlas6_clks[maxclk];
117 static void __init atlas6_clk_init(struct device_node *np)
119 struct device_node *rscnp;
122 rscnp = of_find_compatible_node(NULL, NULL, "sirf,prima2-rsc");
123 sirfsoc_rsc_vbase = of_iomap(rscnp, 0);
124 if (!sirfsoc_rsc_vbase)
125 panic("unable to map rsc registers\n");
128 sirfsoc_clk_vbase = of_iomap(np, 0);
129 if (!sirfsoc_clk_vbase)
130 panic("unable to map clkc registers\n");
132 /* These are always available (RTC and 26MHz OSC)*/
133 atlas6_clks[rtc] = clk_register_fixed_rate(NULL, "rtc", NULL,
135 atlas6_clks[osc] = clk_register_fixed_rate(NULL, "osc", NULL,
136 CLK_IS_ROOT, 26000000);
138 for (i = pll1; i < maxclk; i++) {
139 atlas6_clks[i] = clk_register(NULL, atlas6_clk_hw_array[i]);
140 BUG_ON(!atlas6_clks[i]);
142 clk_register_clkdev(atlas6_clks[cpu], NULL, "cpu");
143 clk_register_clkdev(atlas6_clks[io], NULL, "io");
144 clk_register_clkdev(atlas6_clks[mem], NULL, "mem");
145 clk_register_clkdev(atlas6_clks[mem], NULL, "osc");
147 clk_data.clks = atlas6_clks;
148 clk_data.clk_num = maxclk;
150 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
152 CLK_OF_DECLARE(atlas6_clk, "sirf,atlas6-clkc", atlas6_clk_init);