linux-imx

/*

 * AXI clkgen driver

 *

 * Copyright 2012-2013 Analog Devices Inc.

 *  Author: Lars-Peter Clausen <lars@metafoo.de>

 *

 * Licensed under the GPL-2.

 *

 */

​

#include <linux/platform_device.h>

#include <linux/clk-provider.h>

#include <linux/slab.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/module.h>

#include <linux/err.h>

​

#define AXI_CLKGEN_V2_REG_RESET     0x40

#define AXI_CLKGEN_V2_REG_CLKSEL    0x44

#define AXI_CLKGEN_V2_REG_DRP_CNTRL 0x70

#define AXI_CLKGEN_V2_REG_DRP_STATUS    0x74

​

#define AXI_CLKGEN_V2_RESET_MMCM_ENABLE BIT(1)

#define AXI_CLKGEN_V2_RESET_ENABLE  BIT(0)

​

#define AXI_CLKGEN_V2_DRP_CNTRL_SEL BIT(29)

#define AXI_CLKGEN_V2_DRP_CNTRL_READ    BIT(28)

​

#define AXI_CLKGEN_V2_DRP_STATUS_BUSY   BIT(16)

​

#define MMCM_REG_CLKOUT0_1  0x08

#define MMCM_REG_CLKOUT0_2  0x09

#define MMCM_REG_CLK_FB1    0x14

#define MMCM_REG_CLK_FB2    0x15

#define MMCM_REG_CLK_DIV    0x16

#define MMCM_REG_LOCK1      0x18

#define MMCM_REG_LOCK2      0x19

#define MMCM_REG_LOCK3      0x1a

#define MMCM_REG_FILTER1    0x4e

#define MMCM_REG_FILTER2    0x4f

​

#define MMCM_CLKOUT_NOCOUNT BIT(6)

​

#define MMCM_CLK_DIV_NOCOUNT    BIT(12)

​

struct axi_clkgen {

    void __iomem *base;

    struct clk_hw clk_hw;

};

​

static uint32_t axi_clkgen_lookup_filter(unsigned int m)

{

    switch (m) {

    case 0:

        return 0x01001990;

    case 1:

        return 0x01001190;

    case 2:

        return 0x01009890;

    case 3:

        return 0x01001890;

    case 4:

        return 0x01008890;

    case 5 ... 8:

        return 0x01009090;

    case 9 ... 11:

        return 0x01000890;

    case 12:

        return 0x08009090;

    case 13 ... 22:

        return 0x01001090;

    case 23 ... 36:

        return 0x01008090;

    case 37 ... 46:

        return 0x08001090;

    default:

        return 0x08008090;

    }

}

​

static const uint32_t axi_clkgen_lock_table[] = {

    0x060603e8, 0x060603e8, 0x080803e8, 0x0b0b03e8,

    0x0e0e03e8, 0x111103e8, 0x131303e8, 0x161603e8,

    0x191903e8, 0x1c1c03e8, 0x1f1f0384, 0x1f1f0339,

    0x1f1f02ee, 0x1f1f02bc, 0x1f1f028a, 0x1f1f0271,

    0x1f1f023f, 0x1f1f0226, 0x1f1f020d, 0x1f1f01f4,

    0x1f1f01db, 0x1f1f01c2, 0x1f1f01a9, 0x1f1f0190,

    0x1f1f0190, 0x1f1f0177, 0x1f1f015e, 0x1f1f015e,

    0x1f1f0145, 0x1f1f0145, 0x1f1f012c, 0x1f1f012c,

    0x1f1f012c, 0x1f1f0113, 0x1f1f0113, 0x1f1f0113,

};