mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 01:16:42 +07:00
30c67e93c5
The usual selection of bug fixes and driver updates for GPIO. Nothing really stands out except the addition of the GRGPIO driver and some enhacements to ACPI support -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJRhuKVAAoJEEFnBt12D9kB8kUP/21N7fsCxNocqoIwX8VQPfEY KsXUKRstuETHERHpGCSvMuRAEy1vee9itijrmWOiQT09jztIxg3Sed3u0RCQjQEK mV87RdAObZzm6xTIpy5sQa1bMOlc2AzYhTDDr9f1OpU+L9XMhwq03wq/i74Zij3w 7vq5BkBfGWF84TY5ZG1SNIvtw9P2MYoCHtJKvFyTJWAH05m2bHSfuvvn8vIdcUBL TuVwoeUzbYJtTJatovkh0kyMOOZEh9JVWBPBTNNLyYDmpAKQ6RwBoAi0ZznmF4mk gp88dj6iMHebi7UnlDQJD5crw16cRoMh0pa3EBAjYM0IVhfn8AvFIhma34wTs1Z/ ZuWwwHeR93cQTKwMBT1OHRCPaOdjS5riAR4WJm5Tmq9dV0sjGlbwff26U1uHH8qX mTBA+tje4bVpSHEztmXyw0AOMUv2vid5P0F/sKtEHzfURf8Yjq8xvxyvq14T3dQQ /wzmdLKbzR05phft7Xxa4yzfSy46uvxyUJQQaKdU/jlay/gJFisJXJE0cOrwTOFo SpTCmjnacr8Tlqr04Fj8f8ZgOYrg5VAOUsVE8uY0ETWRCb7iezFw7JGE3qV1kZQk N1lPBbSnIwtkdMiEmyttxpFEb5PwJxX8pUP6JfNyMbMlHoZs2247SeakhRQs/OCx goJQEGz6eeOpvq7koiJg =PwUd -----END PGP SIGNATURE----- Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux Pull GPIO changes from Grant Likely: "The usual selection of bug fixes and driver updates for GPIO. Nothing really stands out except the addition of the GRGPIO driver and some enhacements to ACPI support" I'm pulling this despite the earlier mess. Let's hope it compiles these days. * tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: (46 commits) gpio: grgpio: Add irq support gpio: grgpio: Add device driver for GRGPIO cores gpiolib-acpi: introduce acpi_get_gpio_by_index() helper GPIO: gpio-generic: remove kfree() from bgpio_remove call gpio / ACPI: Handle ACPI events in accordance with the spec gpio: lpc32xx: Fix off-by-one valid range checking for bank gpio: mcp23s08: convert driver to DT gpio/omap: force restore if context loss is not detectable gpio/omap: optimise interrupt service routine gpio/omap: remove extra context restores in *_runtime_resume() gpio/omap: free irq domain in probe() failure paths gpio: gpio-generic: Add 16 and 32 bit big endian byte order support gpio: samsung: Add terminating entry for exynos_pinctrl_ids gpio: mvebu: add dbg_show function MAX7301 GPIO: Do not force SPI speed when using OF Platform gpio: gpio-tps65910.c: fix checkpatch error gpio: gpio-timberdale.c: fix checkpatch error gpio: gpio-tc3589x.c: fix checkpatch errors gpio: gpio-stp-xway.c: fix checkpatch error gpio: gpio-sch.c: fix checkpatch error ...
245 lines
6.0 KiB
C
245 lines
6.0 KiB
C
/*
|
|
* OF helpers for the GPIO API
|
|
*
|
|
* Copyright (c) 2007-2008 MontaVista Software, Inc.
|
|
*
|
|
* Author: Anton Vorontsov <avorontsov@ru.mvista.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/device.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/pinctrl/pinctrl.h>
|
|
#include <linux/slab.h>
|
|
|
|
/* Private data structure for of_gpiochip_find_and_xlate */
|
|
struct gg_data {
|
|
enum of_gpio_flags *flags;
|
|
struct of_phandle_args gpiospec;
|
|
|
|
int out_gpio;
|
|
};
|
|
|
|
/* Private function for resolving node pointer to gpio_chip */
|
|
static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data)
|
|
{
|
|
struct gg_data *gg_data = data;
|
|
int ret;
|
|
|
|
if ((gc->of_node != gg_data->gpiospec.np) ||
|
|
(gc->of_gpio_n_cells != gg_data->gpiospec.args_count) ||
|
|
(!gc->of_xlate))
|
|
return false;
|
|
|
|
ret = gc->of_xlate(gc, &gg_data->gpiospec, gg_data->flags);
|
|
if (ret < 0)
|
|
return false;
|
|
|
|
gg_data->out_gpio = ret + gc->base;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* of_get_named_gpio_flags() - Get a GPIO number and flags to use with GPIO API
|
|
* @np: device node to get GPIO from
|
|
* @propname: property name containing gpio specifier(s)
|
|
* @index: index of the GPIO
|
|
* @flags: a flags pointer to fill in
|
|
*
|
|
* Returns GPIO number to use with Linux generic GPIO API, or one of the errno
|
|
* value on the error condition. If @flags is not NULL the function also fills
|
|
* in flags for the GPIO.
|
|
*/
|
|
int of_get_named_gpio_flags(struct device_node *np, const char *propname,
|
|
int index, enum of_gpio_flags *flags)
|
|
{
|
|
/* Return -EPROBE_DEFER to support probe() functions to be called
|
|
* later when the GPIO actually becomes available
|
|
*/
|
|
struct gg_data gg_data = { .flags = flags, .out_gpio = -EPROBE_DEFER };
|
|
int ret;
|
|
|
|
/* .of_xlate might decide to not fill in the flags, so clear it. */
|
|
if (flags)
|
|
*flags = 0;
|
|
|
|
ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index,
|
|
&gg_data.gpiospec);
|
|
if (ret) {
|
|
pr_debug("%s: can't parse gpios property\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);
|
|
|
|
of_node_put(gg_data.gpiospec.np);
|
|
pr_debug("%s exited with status %d\n", __func__, gg_data.out_gpio);
|
|
return gg_data.out_gpio;
|
|
}
|
|
EXPORT_SYMBOL(of_get_named_gpio_flags);
|
|
|
|
/**
|
|
* of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags
|
|
* @gc: pointer to the gpio_chip structure
|
|
* @np: device node of the GPIO chip
|
|
* @gpio_spec: gpio specifier as found in the device tree
|
|
* @flags: a flags pointer to fill in
|
|
*
|
|
* This is simple translation function, suitable for the most 1:1 mapped
|
|
* gpio chips. This function performs only one sanity check: whether gpio
|
|
* is less than ngpios (that is specified in the gpio_chip).
|
|
*/
|
|
int of_gpio_simple_xlate(struct gpio_chip *gc,
|
|
const struct of_phandle_args *gpiospec, u32 *flags)
|
|
{
|
|
/*
|
|
* We're discouraging gpio_cells < 2, since that way you'll have to
|
|
* write your own xlate function (that will have to retrive the GPIO
|
|
* number and the flags from a single gpio cell -- this is possible,
|
|
* but not recommended).
|
|
*/
|
|
if (gc->of_gpio_n_cells < 2) {
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
|
|
return -EINVAL;
|
|
|
|
if (gpiospec->args[0] >= gc->ngpio)
|
|
return -EINVAL;
|
|
|
|
if (flags)
|
|
*flags = gpiospec->args[1];
|
|
|
|
return gpiospec->args[0];
|
|
}
|
|
EXPORT_SYMBOL(of_gpio_simple_xlate);
|
|
|
|
/**
|
|
* of_mm_gpiochip_add - Add memory mapped GPIO chip (bank)
|
|
* @np: device node of the GPIO chip
|
|
* @mm_gc: pointer to the of_mm_gpio_chip allocated structure
|
|
*
|
|
* To use this function you should allocate and fill mm_gc with:
|
|
*
|
|
* 1) In the gpio_chip structure:
|
|
* - all the callbacks
|
|
* - of_gpio_n_cells
|
|
* - of_xlate callback (optional)
|
|
*
|
|
* 3) In the of_mm_gpio_chip structure:
|
|
* - save_regs callback (optional)
|
|
*
|
|
* If succeeded, this function will map bank's memory and will
|
|
* do all necessary work for you. Then you'll able to use .regs
|
|
* to manage GPIOs from the callbacks.
|
|
*/
|
|
int of_mm_gpiochip_add(struct device_node *np,
|
|
struct of_mm_gpio_chip *mm_gc)
|
|
{
|
|
int ret = -ENOMEM;
|
|
struct gpio_chip *gc = &mm_gc->gc;
|
|
|
|
gc->label = kstrdup(np->full_name, GFP_KERNEL);
|
|
if (!gc->label)
|
|
goto err0;
|
|
|
|
mm_gc->regs = of_iomap(np, 0);
|
|
if (!mm_gc->regs)
|
|
goto err1;
|
|
|
|
gc->base = -1;
|
|
|
|
if (mm_gc->save_regs)
|
|
mm_gc->save_regs(mm_gc);
|
|
|
|
mm_gc->gc.of_node = np;
|
|
|
|
ret = gpiochip_add(gc);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
return 0;
|
|
err2:
|
|
iounmap(mm_gc->regs);
|
|
err1:
|
|
kfree(gc->label);
|
|
err0:
|
|
pr_err("%s: GPIO chip registration failed with status %d\n",
|
|
np->full_name, ret);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(of_mm_gpiochip_add);
|
|
|
|
#ifdef CONFIG_PINCTRL
|
|
static void of_gpiochip_add_pin_range(struct gpio_chip *chip)
|
|
{
|
|
struct device_node *np = chip->of_node;
|
|
struct of_phandle_args pinspec;
|
|
struct pinctrl_dev *pctldev;
|
|
int index = 0, ret;
|
|
|
|
if (!np)
|
|
return;
|
|
|
|
for (;; index++) {
|
|
ret = of_parse_phandle_with_args(np, "gpio-ranges",
|
|
"#gpio-range-cells", index, &pinspec);
|
|
if (ret)
|
|
break;
|
|
|
|
pctldev = of_pinctrl_get(pinspec.np);
|
|
if (!pctldev)
|
|
break;
|
|
|
|
ret = gpiochip_add_pin_range(chip,
|
|
pinctrl_dev_get_devname(pctldev),
|
|
pinspec.args[0],
|
|
pinspec.args[1],
|
|
pinspec.args[2]);
|
|
|
|
if (ret)
|
|
break;
|
|
}
|
|
}
|
|
|
|
#else
|
|
static void of_gpiochip_add_pin_range(struct gpio_chip *chip) {}
|
|
#endif
|
|
|
|
void of_gpiochip_add(struct gpio_chip *chip)
|
|
{
|
|
if ((!chip->of_node) && (chip->dev))
|
|
chip->of_node = chip->dev->of_node;
|
|
|
|
if (!chip->of_node)
|
|
return;
|
|
|
|
if (!chip->of_xlate) {
|
|
chip->of_gpio_n_cells = 2;
|
|
chip->of_xlate = of_gpio_simple_xlate;
|
|
}
|
|
|
|
of_gpiochip_add_pin_range(chip);
|
|
of_node_get(chip->of_node);
|
|
}
|
|
|
|
void of_gpiochip_remove(struct gpio_chip *chip)
|
|
{
|
|
gpiochip_remove_pin_ranges(chip);
|
|
|
|
if (chip->of_node)
|
|
of_node_put(chip->of_node);
|
|
}
|