uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * Qualcomm pm8916 pmic gpio driver - part of Qualcomm PM8916 PMIC

 *

 * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>

 */

​

#include <common.h>

#include <dm.h>

#include <power/pmic.h>

#include <spmi/spmi.h>

#include <asm/io.h>

#include <asm/gpio.h>

#include <linux/bitops.h>

​

/* Register offset for each gpio */

#define REG_OFFSET(x)          ((x) * 0x100)

​

/* Register maps */

​

/* Type and subtype are shared for all pm8916 peripherals */

#define REG_TYPE               0x4

#define REG_SUBTYPE            0x5

​

#define REG_STATUS             0x08

#define REG_STATUS_VAL_MASK    0x1

​

/* MODE_CTL */

#define REG_CTL     0x40

#define REG_CTL_MODE_MASK       0x70

#define REG_CTL_MODE_INPUT      0x00

#define REG_CTL_MODE_INOUT      0x20

#define REG_CTL_MODE_OUTPUT     0x10

#define REG_CTL_OUTPUT_MASK     0x0F

​

#define REG_DIG_VIN_CTL        0x41

#define REG_DIG_VIN_VIN0       0

​

#define REG_DIG_PULL_CTL       0x42

#define REG_DIG_PULL_NO_PU     0x5

​

#define REG_DIG_OUT_CTL        0x45

#define REG_DIG_OUT_CTL_CMOS   (0x0 << 4)

#define REG_DIG_OUT_CTL_DRIVE_L 0x1

​

#define REG_EN_CTL             0x46

#define REG_EN_CTL_ENABLE      (1 << 7)

​

struct pm8916_gpio_bank {

    uint32_t pid; /* Peripheral ID on SPMI bus */

};

​

static int pm8916_gpio_set_direction(struct udevice *dev, unsigned offset,

                     bool input, int value)

{

    struct pm8916_gpio_bank *priv = dev_get_priv(dev);

    uint32_t gpio_base = priv->pid + REG_OFFSET(offset);

    int ret;

​

    /* Disable the GPIO */

    ret = pmic_clrsetbits(dev->parent, gpio_base + REG_EN_CTL,

                  REG_EN_CTL_ENABLE, 0);

    if (ret < 0)

        return ret;

​

    /* Select the mode */

    if (input)

        ret = pmic_reg_write(dev->parent, gpio_base + REG_CTL,

                     REG_CTL_MODE_INPUT);

    else

        ret = pmic_reg_write(dev->parent, gpio_base + REG_CTL,

                     REG_CTL_MODE_INOUT | (value ? 1 : 0));

    if (ret < 0)

        return ret;

​

    /* Set the right pull (no pull) */

    ret = pmic_reg_write(dev->parent, gpio_base + REG_DIG_PULL_CTL,

                 REG_DIG_PULL_NO_PU);

    if (ret < 0)

        return ret;

​

    /* Configure output pin drivers if needed */

    if (!input) {

        /* Select the VIN - VIN0, pin is input so it doesn't matter */

        ret = pmic_reg_write(dev->parent, gpio_base + REG_DIG_VIN_CTL,

                     REG_DIG_VIN_VIN0);

        if (ret < 0)

            return ret;

​

        /* Set the right dig out control */

        ret = pmic_reg_write(dev->parent, gpio_base + REG_DIG_OUT_CTL,

                     REG_DIG_OUT_CTL_CMOS |