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staging: mt7621-gpio: remove driver from staging

Browse Source 
Remove driver from staging. It has been accepted in
the linux-gpio tree.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergio Paracuellos 2018-07-09 18:05:48 +02:00 committed by Greg Kroah-Hartman
parent 1cb5c5596b
commit 7c478d6a22
7 changed files with 0 additions and 383 deletions
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2
drivers/staging/Kconfig
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@ -112,8 +112,6 @@ source "drivers/staging/pi433/Kconfig"
source "drivers/staging/mt7621-pinctrl/Kconfig"
source "drivers/staging/mt7621-gpio/Kconfig"
source "drivers/staging/mt7621-spi/Kconfig"
source "drivers/staging/mt7621-dma/Kconfig"

1
drivers/staging/Makefile
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@ -47,7 +47,6 @@ obj-$(CONFIG_DRM_VBOXVIDEO) += vboxvideo/
obj-$(CONFIG_PI433) += pi433/
obj-$(CONFIG_SOC_MT7621) += mt7621-pci/
obj-$(CONFIG_SOC_MT7621) += mt7621-pinctrl/
obj-$(CONFIG_SOC_MT7621) += mt7621-gpio/
obj-$(CONFIG_SOC_MT7621) += mt7621-spi/
obj-$(CONFIG_SOC_MT7621) += mt7621-dma/
obj-$(CONFIG_SOC_MT7621) += mt7621-mmc/

8
drivers/staging/mt7621-gpio/Kconfig
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@ -1,8 +0,0 @@
config GPIO_MT7621
bool "Mediatek MT7621 GPIO Support"
depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST
select GPIO_GENERIC
select GPIOLIB_IRQCHIP
select ARCH_REQUIRE_GPIOLIB
help
Say yes here to support the Mediatek MT7621 SoC GPIO device

3
drivers/staging/mt7621-gpio/Makefile
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@ -1,3 +0,0 @@
obj-$(CONFIG_GPIO_MT7621) += gpio-mt7621.o
ccflags-y += -I$(srctree)/$(src)/include

3
drivers/staging/mt7621-gpio/TODO
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@ -1,3 +0,0 @@
- general code review and clean up
Cc: NeilBrown <neil@brown.name>

331
drivers/staging/mt7621-gpio/gpio-mt7621.c
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@ -1,331 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2013 John Crispin <blogic@openwrt.org>
*/
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#define MTK_BANK_CNT 3
#define MTK_BANK_WIDTH 32
#define GPIO_BANK_WIDE 0x04
#define GPIO_REG_CTRL 0x00
#define GPIO_REG_POL 0x10
#define GPIO_REG_DATA 0x20
#define GPIO_REG_DSET 0x30
#define GPIO_REG_DCLR 0x40
#define GPIO_REG_REDGE 0x50
#define GPIO_REG_FEDGE 0x60
#define GPIO_REG_HLVL 0x70
#define GPIO_REG_LLVL 0x80
#define GPIO_REG_STAT 0x90
#define GPIO_REG_EDGE 0xA0
struct mtk_gc {
struct gpio_chip chip;
spinlock_t lock;
int bank;
u32 rising;
u32 falling;
u32 hlevel;
u32 llevel;
};
/**
* struct mtk_data - state container for
* data of the platform driver. It is 3
* separate gpio-chip each one with its
* own irq_chip.
* @dev: device instance
* @gpio_membase: memory base address
* @gpio_irq: irq number from the device tree
* @gc_map: array of the gpio chips
*/
struct mtk_data {
struct device *dev;
void __iomem *gpio_membase;
int gpio_irq;
struct mtk_gc gc_map[MTK_BANK_CNT];
};
static inline struct mtk_gc *
to_mediatek_gpio(struct gpio_chip *chip)
{
return container_of(chip, struct mtk_gc, chip);
}
static inline void
mtk_gpio_w32(struct mtk_gc *rg, u32 offset, u32 val)
{
struct gpio_chip *gc = &rg->chip;
struct mtk_data *gpio_data = gpiochip_get_data(gc);
offset = (rg->bank * GPIO_BANK_WIDE) + offset;
gc->write_reg(gpio_data->gpio_membase + offset, val);
}
static inline u32
mtk_gpio_r32(struct mtk_gc *rg, u32 offset)
{
struct gpio_chip *gc = &rg->chip;
struct mtk_data *gpio_data = gpiochip_get_data(gc);
offset = (rg->bank * GPIO_BANK_WIDE) + offset;
return gc->read_reg(gpio_data->gpio_membase + offset);
}
static irqreturn_t
mediatek_gpio_irq_handler(int irq, void *data)
{
struct gpio_chip *gc = data;
struct mtk_gc *rg = to_mediatek_gpio(gc);
irqreturn_t ret = IRQ_NONE;
unsigned long pending;
int bit;
pending = mtk_gpio_r32(rg, GPIO_REG_STAT);
for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
u32 map = irq_find_mapping(gc->irq.domain, bit);
generic_handle_irq(map);
mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit));
ret |= IRQ_HANDLED;
}
return ret;
}
static void
mediatek_gpio_irq_unmask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct mtk_gc *rg = to_mediatek_gpio(gc);
int pin = d->hwirq;
unsigned long flags;
u32 rise, fall, high, low;
spin_lock_irqsave(&rg->lock, flags);
rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
high = mtk_gpio_r32(rg, GPIO_REG_HLVL);
low = mtk_gpio_r32(rg, GPIO_REG_LLVL);
mtk_gpio_w32(rg, GPIO_REG_REDGE, rise | (BIT(pin) & rg->rising));
mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall | (BIT(pin) & rg->falling));
mtk_gpio_w32(rg, GPIO_REG_HLVL, high | (BIT(pin) & rg->hlevel));
mtk_gpio_w32(rg, GPIO_REG_LLVL, low | (BIT(pin) & rg->llevel));
spin_unlock_irqrestore(&rg->lock, flags);
}
static void
mediatek_gpio_irq_mask(struct irq_data *d)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct mtk_gc *rg = to_mediatek_gpio(gc);
int pin = d->hwirq;
unsigned long flags;
u32 rise, fall, high, low;
spin_lock_irqsave(&rg->lock, flags);
rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
high = mtk_gpio_r32(rg, GPIO_REG_HLVL);
low = mtk_gpio_r32(rg, GPIO_REG_LLVL);
mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall & ~BIT(pin));
mtk_gpio_w32(rg, GPIO_REG_REDGE, rise & ~BIT(pin));
mtk_gpio_w32(rg, GPIO_REG_HLVL, high & ~BIT(pin));
mtk_gpio_w32(rg, GPIO_REG_LLVL, low & ~BIT(pin));
spin_unlock_irqrestore(&rg->lock, flags);
}
static int
mediatek_gpio_irq_type(struct irq_data *d, unsigned int type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct mtk_gc *rg = to_mediatek_gpio(gc);
int pin = d->hwirq;
u32 mask = BIT(pin);
if (type == IRQ_TYPE_PROBE) {
if ((rg->rising | rg->falling |
rg->hlevel | rg->llevel) & mask)
return 0;
type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
}
rg->rising &= ~mask;
rg->falling &= ~mask;
rg->hlevel &= ~mask;
rg->llevel &= ~mask;
switch (type & IRQ_TYPE_SENSE_MASK) {
case IRQ_TYPE_EDGE_BOTH:
rg->rising |= mask;
rg->falling |= mask;
break;
case IRQ_TYPE_EDGE_RISING:
rg->rising |= mask;
break;
case IRQ_TYPE_EDGE_FALLING:
rg->falling |= mask;
break;
case IRQ_TYPE_LEVEL_HIGH:
rg->hlevel |= mask;
break;
case IRQ_TYPE_LEVEL_LOW:
rg->llevel |= mask;
break;
}
return 0;
}
static struct irq_chip mediatek_gpio_irq_chip = {
.irq_unmask = mediatek_gpio_irq_unmask,
.irq_mask = mediatek_gpio_irq_mask,
.irq_mask_ack = mediatek_gpio_irq_mask,
.irq_set_type = mediatek_gpio_irq_type,
};
static int
mediatek_gpio_xlate(struct gpio_chip *chip,
const struct of_phandle_args *spec, u32 *flags)
{
int gpio = spec->args[0];
struct mtk_gc *rg = to_mediatek_gpio(chip);
if (rg->bank != gpio / MTK_BANK_WIDTH)
return -EINVAL;
if (flags)
*flags = spec->args[1];
return gpio % MTK_BANK_WIDTH;
}
static int
mediatek_gpio_bank_probe(struct platform_device *pdev,
struct device_node *node, int bank)
{
struct mtk_data *gpio = dev_get_drvdata(&pdev->dev);
struct mtk_gc *rg;
void __iomem *dat, *set, *ctrl, *diro;
int ret;
rg = &gpio->gc_map[bank];
memset(rg, 0, sizeof(*rg));
spin_lock_init(&rg->lock);
rg->chip.of_node = node;
rg->bank = bank;
dat = gpio->gpio_membase + GPIO_REG_DATA + (rg->bank * GPIO_BANK_WIDE);
set = gpio->gpio_membase + GPIO_REG_DSET + (rg->bank * GPIO_BANK_WIDE);
ctrl = gpio->gpio_membase + GPIO_REG_DCLR + (rg->bank * GPIO_BANK_WIDE);
diro = gpio->gpio_membase + GPIO_REG_CTRL + (rg->bank * GPIO_BANK_WIDE);
ret = bgpio_init(&rg->chip, &pdev->dev, 4,
dat, set, ctrl, diro, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "bgpio_init() failed\n");
return ret;
}
rg->chip.of_gpio_n_cells = 2;
rg->chip.of_xlate = mediatek_gpio_xlate;
rg->chip.label = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%s-bank%d",
dev_name(&pdev->dev), bank);
ret = devm_gpiochip_add_data(&pdev->dev, &rg->chip, gpio);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpio %d, ret=%d\n",
rg->chip.ngpio, ret);
return ret;
}
if (gpio->gpio_irq) {
/*
* Manually request the irq here instead of passing
* a flow-handler to gpiochip_set_chained_irqchip,
* because the irq is shared.
*/
ret = devm_request_irq(&pdev->dev, gpio->gpio_irq,
mediatek_gpio_irq_handler, IRQF_SHARED,
rg->chip.label, &rg->chip);
if (ret) {
dev_err(&pdev->dev, "Error requesting IRQ %d: %d\n",
gpio->gpio_irq, ret);
return ret;
}
ret = gpiochip_irqchip_add(&rg->chip, &mediatek_gpio_irq_chip,
0, handle_simple_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(&pdev->dev, "failed to add gpiochip_irqchip\n");
return ret;
}
gpiochip_set_chained_irqchip(&rg->chip, &mediatek_gpio_irq_chip,
gpio->gpio_irq, NULL);
}
/* set polarity to low for all gpios */
mtk_gpio_w32(rg, GPIO_REG_POL, 0);
dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
return 0;
}
static int
mediatek_gpio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct mtk_data *gpio_data;
int i;
gpio_data = devm_kzalloc(&pdev->dev, sizeof(*gpio_data), GFP_KERNEL);
if (!gpio_data)
return -ENOMEM;
gpio_data->gpio_membase = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(gpio_data->gpio_membase))
return PTR_ERR(gpio_data->gpio_membase);
gpio_data->gpio_irq = irq_of_parse_and_map(np, 0);
gpio_data->dev = &pdev->dev;
platform_set_drvdata(pdev, gpio_data);
mediatek_gpio_irq_chip.name = dev_name(&pdev->dev);
for (i = 0; i < MTK_BANK_CNT; i++)
mediatek_gpio_bank_probe(pdev, np, i);
return 0;
}
static const struct of_device_id mediatek_gpio_match[] = {
{ .compatible = "mediatek,mt7621-gpio" },
{},
};
MODULE_DEVICE_TABLE(of, mediatek_gpio_match);
static struct platform_driver mediatek_gpio_driver = {
.probe = mediatek_gpio_probe,
.driver = {
.name = "mt7621_gpio",
.of_match_table = mediatek_gpio_match,
},
};
builtin_platform_driver(mediatek_gpio_driver);

35
drivers/staging/mt7621-gpio/mediatek,mt7621-gpio.txt
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@ -1,35 +0,0 @@
Mediatek MT7621 SoC GPIO controller bindings
The IP core used inside these SoCs has 3 banks of 32 GPIOs each.
The registers of all the banks are interwoven inside one single IO range.
We load one GPIO controller instance per bank. Also the GPIO controller can receive
interrupts on any of the GPIOs, either edge or level. It then interrupts the CPU
using GIC INT12.
Required properties for the top level node:
- #gpio-cells : Should be two. The first cell is the GPIO pin number and the
second cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
Only the GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
- #interrupt-cells : Specifies the number of cells needed to encode an
interrupt. Should be 2. The first cell defines the interrupt number,
the second encodes the triger flags encoded as described in
Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
- compatible:
- "mediatek,mt7621-gpio" for Mediatek controllers
- reg : Physical base address and length of the controller's registers
- interrupt-parent : phandle of the parent interrupt controller.
- interrupts : Interrupt specifier for the controllers interrupt.
- interrupt-controller : Mark the device node as an interrupt controller.
- gpio-controller : Marks the device node as a GPIO controller.
Example:
gpio@600 {
#gpio-cells = <2>;
#interrupt-cells = <2>;
compatible = "mediatek,mt7621-gpio";
gpio-controller;
interrupt-controller;
reg = <0x600 0x100>;
interrupt-parent = <&gic>;
interrupts = <GIC_SHARED 12 IRQ_TYPE_LEVEL_HIGH>;
};