linux-imx

/*

 * Marvell Dove pinctrl driver based on mvebu pinctrl core

 *

 * Author: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

​

#include <linux/err.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/bitops.h>

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/mfd/syscon.h>

#include <linux/pinctrl/pinctrl.h>

#include <linux/regmap.h>

​

#include "pinctrl-mvebu.h"

​

/* Internal registers can be configured at any 1 MiB aligned address */

#define INT_REGS_MASK       ~(SZ_1M - 1)

#define MPP4_REGS_OFFS      0xd0440

#define PMU_REGS_OFFS       0xd802c

#define GC_REGS_OFFS        0xe802c

​

/* MPP Base registers */

#define PMU_MPP_GENERAL_CTRL    0x10

#define  AU0_AC97_SEL       BIT(16)

​

/* MPP Control 4 register */

#define SPI_GPIO_SEL        BIT(5)

#define UART1_GPIO_SEL      BIT(4)

#define AU1_GPIO_SEL        BIT(3)

#define CAM_GPIO_SEL        BIT(2)

#define SD1_GPIO_SEL        BIT(1)

#define SD0_GPIO_SEL        BIT(0)

​

/* PMU Signal Select registers */

#define PMU_SIGNAL_SELECT_0 0x00

#define PMU_SIGNAL_SELECT_1 0x04

​

/* Global Config regmap registers */

#define GLOBAL_CONFIG_1     0x00

#define  TWSI_ENABLE_OPTION1    BIT(7)

#define GLOBAL_CONFIG_2     0x04

#define  TWSI_ENABLE_OPTION2    BIT(20)

#define  TWSI_ENABLE_OPTION3    BIT(21)

#define  TWSI_OPTION3_GPIO  BIT(22)

#define SSP_CTRL_STATUS_1   0x08

#define  SSP_ON_AU1     BIT(0)

#define MPP_GENERAL_CONFIG  0x10

#define  AU1_SPDIFO_GPIO_EN BIT(1)

#define  NAND_GPIO_EN       BIT(0)

​

#define CONFIG_PMU  BIT(4)

​

static void __iomem *mpp4_base;

static void __iomem *pmu_base;

static struct regmap *gconfmap;

​

static int dove_pmu_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,

                 unsigned pid, unsigned long *config)

{

    unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;

    unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;

    unsigned long pmu = readl(data->base + PMU_MPP_GENERAL_CTRL);

    unsigned long func;

​

    if ((pmu & BIT(pid)) == 0)

        return mvebu_mmio_mpp_ctrl_get(data, pid, config);

​

    func = readl(pmu_base + PMU_SIGNAL_SELECT_0 + off);

    *config = (func >> shift) & MVEBU_MPP_MASK;

    *config |= CONFIG_PMU;

​

    return 0;

}

​

static int dove_pmu_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,

                 unsigned pid, unsigned long config)

{

    unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;

    unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;

    unsigned long pmu = readl(data->base + PMU_MPP_GENERAL_CTRL);

    unsigned long func;

​