/*
   * abx500 clock implementation for ux500 platform.
   *
   * Copyright (C) 2012 ST-Ericsson SA
   * Author: Ulf Hansson <ulf.hansson@linaro.org>
   *
   * License terms: GNU General Public License (GPL) version 2
   */
  
  #include <linux/err.h>
  #include <linux/module.h>
  #include <linux/device.h>
  #include <linux/platform_device.h>
  #include <linux/mfd/abx500/ab8500.h>

  #include <linux/mfd/abx500/ab8500-sysctrl.h>

  #include <linux/clkdev.h>
  #include <linux/clk-provider.h>
  #include <linux/mfd/dbx500-prcmu.h>
  #include "clk.h"

  
  /* Clock definitions for ab8500 */
  static int ab8500_reg_clks(struct device *dev)
  {

  	int ret;
  	struct clk *clk;
  
  	const char *intclk_parents[] = {"ab8500_sysclk", "ulpclk"};
  	u16 intclk_reg_sel[] = {0 , AB8500_SYSULPCLKCTRL1};
  	u8 intclk_reg_mask[] = {0 , AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_MASK};
  	u8 intclk_reg_bits[] = {
  		0 ,
  		(1 << AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_SHIFT)
  	};
  
  	dev_info(dev, "register clocks for ab850x
  ");
  
  	/* Enable SWAT */
  	ret = ab8500_sysctrl_set(AB8500_SWATCTRL, AB8500_SWATCTRL_SWATENABLE);
  	if (ret)
  		return ret;
  
  	/* ab8500_sysclk */

  	clk = clk_reg_prcmu_gate("ab8500_sysclk", NULL, PRCMU_SYSCLK, 0);

  	clk_register_clkdev(clk, "sysclk", "ab8500-usb.0");
  	clk_register_clkdev(clk, "sysclk", "ab-iddet.0");

  	clk_register_clkdev(clk, "sysclk", "snd-soc-mop500.0");

  	clk_register_clkdev(clk, "sysclk", "shrm_bus");
  
  	/* ab8500_sysclk2 */
  	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk2", "ab8500_sysclk",
  		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ,
  		AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, 0, 0);
  	clk_register_clkdev(clk, "sysclk", "0-0070");
  
  	/* ab8500_sysclk3 */
  	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk3", "ab8500_sysclk",
  		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ,
  		AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, 0, 0);
  	clk_register_clkdev(clk, "sysclk", "cg1960_core.0");
  
  	/* ab8500_sysclk4 */
  	clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk4", "ab8500_sysclk",
  		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ,
  		AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, 0, 0);
  
  	/* ab_ulpclk */
  	clk = clk_reg_sysctrl_gate_fixed_rate(dev, "ulpclk", NULL,
  		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_ULPCLKREQ,
  		AB8500_SYSULPCLKCTRL1_ULPCLKREQ,

  		38400000, 9000, 0);

  	clk_register_clkdev(clk, "ulpclk", "snd-soc-mop500.0");

  
  	/* ab8500_intclk */
  	clk = clk_reg_sysctrl_set_parent(dev , "intclk", intclk_parents, 2,
  		intclk_reg_sel, intclk_reg_mask, intclk_reg_bits, 0);

  	clk_register_clkdev(clk, "intclk", "snd-soc-mop500.0");

  	clk_register_clkdev(clk, NULL, "ab8500-pwm.1");
  
  	/* ab8500_audioclk */
  	clk = clk_reg_sysctrl_gate(dev , "audioclk", "intclk",
  		AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA,
  		AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, 0, 0);

  	clk_register_clkdev(clk, "audioclk", "ab8500-codec.0");

  	return 0;
  }
  
  /* Clock definitions for ab8540 */
  static int ab8540_reg_clks(struct device *dev)
  {
  	return 0;
  }
  
  /* Clock definitions for ab9540 */
  static int ab9540_reg_clks(struct device *dev)
  {
  	return 0;
  }

  static int abx500_clk_probe(struct platform_device *pdev)

  {
  	struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
  	int ret;
  
  	if (is_ab8500(parent) || is_ab8505(parent)) {
  		ret = ab8500_reg_clks(&pdev->dev);
  	} else if (is_ab8540(parent)) {
  		ret = ab8540_reg_clks(&pdev->dev);
  	} else if (is_ab9540(parent)) {
  		ret = ab9540_reg_clks(&pdev->dev);
  	} else {
  		dev_err(&pdev->dev, "non supported plf id
  ");
  		return -ENODEV;
  	}
  
  	return ret;
  }
  
  static struct platform_driver abx500_clk_driver = {
  	.driver = {
  		.name = "abx500-clk",

  	},
  	.probe	= abx500_clk_probe,
  };
  
  static int __init abx500_clk_init(void)
  {
  	return platform_driver_register(&abx500_clk_driver);
  }
  
  arch_initcall(abx500_clk_init);
  
  MODULE_AUTHOR("Ulf Hansson <ulf.hansson@linaro.org");
  MODULE_DESCRIPTION("ABX500 clk driver");
  MODULE_LICENSE("GPL v2");