Release 4.11 drivers/gpio/gpio-wm8994.c
/*
* gpiolib support for Wolfson WM8994
*
* Copyright 2009 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.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/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/regmap.h>
#include <linux/mfd/wm8994/core.h>
#include <linux/mfd/wm8994/pdata.h>
#include <linux/mfd/wm8994/gpio.h>
#include <linux/mfd/wm8994/registers.h>
struct wm8994_gpio {
struct wm8994 *wm8994;
struct gpio_chip gpio_chip;
};
static int wm8994_gpio_request(struct gpio_chip *chip, unsigned offset)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
switch (wm8994->type) {
case WM8958:
switch (offset) {
case 1:
case 2:
case 3:
case 4:
case 6:
return -EINVAL;
}
break;
default:
break;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 74 | 98.67% | 1 | 50.00% |
| Linus Walleij | 1 | 1.33% | 1 | 50.00% |
| Total | 75 | 100.00% | 2 | 100.00% |
static int wm8994_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
WM8994_GPN_DIR, WM8994_GPN_DIR);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 46 | 97.87% | 1 | 50.00% |
| Linus Walleij | 1 | 2.13% | 1 | 50.00% |
| Total | 47 | 100.00% | 2 | 100.00% |
static int wm8994_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
int ret;
ret = wm8994_reg_read(wm8994, WM8994_GPIO_1 + offset);
if (ret < 0)
return ret;
if (ret & WM8994_GPN_LVL)
return 1;
else
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 68 | 98.55% | 1 | 50.00% |
| Linus Walleij | 1 | 1.45% | 1 | 50.00% |
| Total | 69 | 100.00% | 2 | 100.00% |
static int wm8994_gpio_direction_out(struct gpio_chip *chip,
unsigned offset, int value)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
if (value)
value = WM8994_GPN_LVL;
return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
WM8994_GPN_DIR | WM8994_GPN_LVL, value);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 59 | 98.33% | 2 | 66.67% |
| Linus Walleij | 1 | 1.67% | 1 | 33.33% |
| Total | 60 | 100.00% | 3 | 100.00% |
static void wm8994_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
if (value)
value = WM8994_GPN_LVL;
wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset, WM8994_GPN_LVL, value);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 56 | 98.25% | 1 | 50.00% |
| Linus Walleij | 1 | 1.75% | 1 | 50.00% |
| Total | 57 | 100.00% | 2 | 100.00% |
static int wm8994_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
unsigned long config)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
switch (pinconf_to_config_param(config)) {
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
WM8994_GPN_OP_CFG_MASK,
WM8994_GPN_OP_CFG);
case PIN_CONFIG_DRIVE_PUSH_PULL:
return wm8994_set_bits(wm8994, WM8994_GPIO_1 + offset,
WM8994_GPN_OP_CFG_MASK, 0);
default:
break;
}
return -ENOTSUPP;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Walleij | 77 | 88.51% | 1 | 50.00% |
| Mika Westerberg | 10 | 11.49% | 1 | 50.00% |
| Total | 87 | 100.00% | 2 | 100.00% |
static int wm8994_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
return regmap_irq_get_virq(wm8994->irq_data, offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 42 | 97.67% | 2 | 66.67% |
| Linus Walleij | 1 | 2.33% | 1 | 33.33% |
| Total | 43 | 100.00% | 3 | 100.00% |
#ifdef CONFIG_DEBUG_FS
static const char *wm8994_gpio_fn(u16 fn)
{
switch (fn) {
case WM8994_GP_FN_PIN_SPECIFIC:
return "pin-specific";
case WM8994_GP_FN_GPIO:
return "GPIO";
case WM8994_GP_FN_SDOUT:
return "SDOUT";
case WM8994_GP_FN_IRQ:
return "IRQ";
case WM8994_GP_FN_TEMPERATURE:
return "Temperature";
case WM8994_GP_FN_MICBIAS1_DET:
return "MICBIAS1 detect";
case WM8994_GP_FN_MICBIAS1_SHORT:
return "MICBIAS1 short";
case WM8994_GP_FN_MICBIAS2_DET:
return "MICBIAS2 detect";
case WM8994_GP_FN_MICBIAS2_SHORT:
return "MICBIAS2 short";
case WM8994_GP_FN_FLL1_LOCK:
return "FLL1 lock";
case WM8994_GP_FN_FLL2_LOCK:
return "FLL2 lock";
case WM8994_GP_FN_SRC1_LOCK:
return "SRC1 lock";
case WM8994_GP_FN_SRC2_LOCK:
return "SRC2 lock";
case WM8994_GP_FN_DRC1_ACT:
return "DRC1 activity";
case WM8994_GP_FN_DRC2_ACT:
return "DRC2 activity";
case WM8994_GP_FN_DRC3_ACT:
return "DRC3 activity";
case WM8994_GP_FN_WSEQ_STATUS:
return "Write sequencer";
case WM8994_GP_FN_FIFO_ERROR:
return "FIFO error";
case WM8994_GP_FN_OPCLK:
return "OPCLK";
case WM8994_GP_FN_THW:
return "Thermal warning";
case WM8994_GP_FN_DCS_DONE:
return "DC servo";
case WM8994_GP_FN_FLL1_OUT:
return "FLL1 output";
case WM8994_GP_FN_FLL2_OUT:
return "FLL1 output";
default:
return "Unknown";
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 159 | 100.00% | 1 | 100.00% |
| Total | 159 | 100.00% | 1 | 100.00% |
static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
struct wm8994_gpio *wm8994_gpio = gpiochip_get_data(chip);
struct wm8994 *wm8994 = wm8994_gpio->wm8994;
int i;
for (i = 0; i < chip->ngpio; i++) {
int gpio = i + chip->base;
int reg;
const char *label;
/* We report the GPIO even if it's not requested since
* we're also reporting things like alternate
* functions which apply even when the GPIO is not in
* use as a GPIO.
*/
label = gpiochip_is_requested(chip, i);
if (!label)
label = "Unrequested";
seq_printf(s, " gpio-%-3d (%-20.20s) ", gpio, label);
reg = wm8994_reg_read(wm8994, WM8994_GPIO_1 + i);
if (reg < 0) {
dev_err(wm8994->dev,
"GPIO control %d read failed: %d\n",
gpio, reg);
seq_printf(s, "\n");
continue;
}
if (reg & WM8994_GPN_DIR)
seq_printf(s, "in ");
else
seq_printf(s, "out ");
if (reg & WM8994_GPN_PU)
seq_printf(s, "pull up ");
if (reg & WM8994_GPN_PD)
seq_printf(s, "pull down ");
if (reg & WM8994_GPN_POL)
seq_printf(s, "inverted ");
else
seq_printf(s, "noninverted ");
if (reg & WM8994_GPN_OP_CFG)
seq_printf(s, "open drain ");
else
seq_printf(s, "push-pull ");
seq_printf(s, "%s (%x)\n",
wm8994_gpio_fn(reg & WM8994_GPN_FN_MASK), reg);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 245 | 99.19% | 2 | 50.00% |
| Linus Walleij | 2 | 0.81% | 2 | 50.00% |
| Total | 247 | 100.00% | 4 | 100.00% |
#else
#define wm8994_gpio_dbg_show NULL
#endif
static const struct gpio_chip template_chip = {
.label = "wm8994",
.owner = THIS_MODULE,
.request = wm8994_gpio_request,
.direction_input = wm8994_gpio_direction_in,
.get = wm8994_gpio_get,
.direction_output = wm8994_gpio_direction_out,
.set = wm8994_gpio_set,
.set_config = wm8994_gpio_set_config,
.to_irq = wm8994_gpio_to_irq,
.dbg_show = wm8994_gpio_dbg_show,
.can_sleep = true,
};
static int wm8994_gpio_probe(struct platform_device *pdev)
{
struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
struct wm8994_pdata *pdata = dev_get_platdata(wm8994->dev);
struct wm8994_gpio *wm8994_gpio;
int ret;
wm8994_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm8994_gpio),
GFP_KERNEL);
if (wm8994_gpio == NULL)
return -ENOMEM;
wm8994_gpio->wm8994 = wm8994;
wm8994_gpio->gpio_chip = template_chip;
wm8994_gpio->gpio_chip.ngpio = WM8994_GPIO_MAX;
wm8994_gpio->gpio_chip.parent = &pdev->dev;
if (pdata && pdata->gpio_base)
wm8994_gpio->gpio_chip.base = pdata->gpio_base;
else
wm8994_gpio->gpio_chip.base = -1;
ret = devm_gpiochip_add_data(&pdev->dev, &wm8994_gpio->gpio_chip,
wm8994_gpio);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n",
ret);
return ret;
}
platform_set_drvdata(pdev, wm8994_gpio);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 165 | 90.66% | 2 | 28.57% |
| Laxman Dewangan | 9 | 4.95% | 1 | 14.29% |
| Jingoo Han | 3 | 1.65% | 1 | 14.29% |
| Linus Walleij | 3 | 1.65% | 2 | 28.57% |
| abdoulaye berthe | 2 | 1.10% | 1 | 14.29% |
| Total | 182 | 100.00% | 7 | 100.00% |
static struct platform_driver wm8994_gpio_driver = {
.driver.name = "wm8994-gpio",
.probe = wm8994_gpio_probe,
};
static int __init wm8994_gpio_init(void)
{
return platform_driver_register(&wm8994_gpio_driver);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
subsys_initcall(wm8994_gpio_init);
static void __exit wm8994_gpio_exit(void)
{
platform_driver_unregister(&wm8994_gpio_driver);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
module_exit(wm8994_gpio_exit);
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("GPIO interface for WM8994");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8994-gpio");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mark Brown | 1108 | 90.01% | 8 | 42.11% |
| Linus Walleij | 92 | 7.47% | 4 | 21.05% |
| Mika Westerberg | 12 | 0.97% | 1 | 5.26% |
| Laxman Dewangan | 9 | 0.73% | 1 | 5.26% |
| Tejun Heo | 3 | 0.24% | 1 | 5.26% |
| Jingoo Han | 3 | 0.24% | 1 | 5.26% |
| abdoulaye berthe | 2 | 0.16% | 1 | 5.26% |
| Julia Lawall | 1 | 0.08% | 1 | 5.26% |
| Grant C. Likely | 1 | 0.08% | 1 | 5.26% |
| Total | 1231 | 100.00% | 19 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.