2 * abx500 clock implementation for ux500 platform.
4 * Copyright (C) 2012 ST-Ericsson SA
5 * Author: Ulf Hansson <ulf.hansson@linaro.org>
7 * License terms: GNU General Public License (GPL) version 2
10 #include <linux/err.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/platform_device.h>
14 #include <linux/mfd/abx500/ab8500.h>
15 #include <linux/mfd/abx500/ab8500-sysctrl.h>
16 #include <linux/clkdev.h>
17 #include <linux/clk-provider.h>
18 #include <linux/mfd/dbx500-prcmu.h>
21 /* Clock definitions for ab8500 */
22 static int ab8500_reg_clks(struct device *dev)
27 const char *intclk_parents[] = {"ab8500_sysclk", "ulpclk"};
28 u16 intclk_reg_sel[] = {0 , AB8500_SYSULPCLKCTRL1};
29 u8 intclk_reg_mask[] = {0 , AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_MASK};
30 u8 intclk_reg_bits[] = {
32 (1 << AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_SHIFT)
35 dev_info(dev, "register clocks for ab850x\n");
38 ret = ab8500_sysctrl_set(AB8500_SWATCTRL, AB8500_SWATCTRL_SWATENABLE);
43 clk = clk_reg_prcmu_gate("ab8500_sysclk", NULL, PRCMU_SYSCLK, 0);
44 clk_register_clkdev(clk, "sysclk", "ab8500-usb.0");
45 clk_register_clkdev(clk, "sysclk", "ab-iddet.0");
46 clk_register_clkdev(clk, "sysclk", "snd-soc-mop500.0");
47 clk_register_clkdev(clk, "sysclk", "shrm_bus");
50 clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk2", "ab8500_sysclk",
51 AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ,
52 AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, 0, 0);
53 clk_register_clkdev(clk, "sysclk", "0-0070");
56 clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk3", "ab8500_sysclk",
57 AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ,
58 AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, 0, 0);
59 clk_register_clkdev(clk, "sysclk", "cg1960_core.0");
62 clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk4", "ab8500_sysclk",
63 AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ,
64 AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, 0, 0);
67 clk = clk_reg_sysctrl_gate_fixed_rate(dev, "ulpclk", NULL,
68 AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_ULPCLKREQ,
69 AB8500_SYSULPCLKCTRL1_ULPCLKREQ,
71 clk_register_clkdev(clk, "ulpclk", "snd-soc-mop500.0");
74 clk = clk_reg_sysctrl_set_parent(dev , "intclk", intclk_parents, 2,
75 intclk_reg_sel, intclk_reg_mask, intclk_reg_bits, 0);
76 clk_register_clkdev(clk, "intclk", "snd-soc-mop500.0");
77 clk_register_clkdev(clk, NULL, "ab8500-pwm.1");
80 clk = clk_reg_sysctrl_gate(dev , "audioclk", "intclk",
81 AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA,
82 AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, 0, 0);
83 clk_register_clkdev(clk, "audioclk", "ab8500-codec.0");
88 /* Clock definitions for ab8540 */
89 static int ab8540_reg_clks(struct device *dev)
94 /* Clock definitions for ab9540 */
95 static int ab9540_reg_clks(struct device *dev)
100 static int abx500_clk_probe(struct platform_device *pdev)
102 struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
105 if (is_ab8500(parent) || is_ab8505(parent)) {
106 ret = ab8500_reg_clks(&pdev->dev);
107 } else if (is_ab8540(parent)) {
108 ret = ab8540_reg_clks(&pdev->dev);
109 } else if (is_ab9540(parent)) {
110 ret = ab9540_reg_clks(&pdev->dev);
112 dev_err(&pdev->dev, "non supported plf id\n");
119 static struct platform_driver abx500_clk_driver = {
121 .name = "abx500-clk",
123 .probe = abx500_clk_probe,
126 static int __init abx500_clk_init(void)
128 return platform_driver_register(&abx500_clk_driver);
131 arch_initcall(abx500_clk_init);
133 MODULE_AUTHOR("Ulf Hansson <ulf.hansson@linaro.org");
134 MODULE_DESCRIPTION("ABX500 clk driver");
135 MODULE_LICENSE("GPL v2");