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Message-Id: <9e5cc9e957144bd5d4081573ef959f931281eaaa.1461888822.git.chunkeey@googlemail.com>
Date: Fri, 29 Apr 2016 02:53:16 +0200
From: Christian Lamparter <chunkeey@...glemail.com>
To: linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: Christian Lamparter <chunkeey@...glemail.com>,
Álvaro Fernández Rojas
<noltari@...il.com>, Kumar Gala <galak@...eaurora.org>,
Alexander Shiyan <shc_work@...l.ru>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Mark Rutland <mark.rutland@....com>,
Pawel Moll <pawel.moll@....com>,
Rob Herring <robh+dt@...nel.org>,
Alexandre Courbot <gnurou@...il.com>,
Linus Walleij <linus.walleij@...aro.org>
Subject: [RFC v5 3/4] gpio: move clps711x, moxart, ts4800 and gpio-ge into gpio-generic
This patch integrates these GPIO drivers into gpio-generic.
Signed-off-by: Christian Lamparter <chunkeey@...glemail.com>
---
drivers/gpio/Kconfig | 43 +++-----------
drivers/gpio/Makefile | 4 --
drivers/gpio/gpio-clps711x.c | 91 -----------------------------
drivers/gpio/gpio-ge.c | 114 ------------------------------------
drivers/gpio/gpio-generic.c | 134 +++++++++++++++++++++++++++++++++++++++++++
drivers/gpio/gpio-moxart.c | 84 ---------------------------
drivers/gpio/gpio-ts4800.c | 81 --------------------------
7 files changed, 142 insertions(+), 409 deletions(-)
delete mode 100644 drivers/gpio/gpio-clps711x.c
delete mode 100644 drivers/gpio/gpio-ge.c
delete mode 100644 drivers/gpio/gpio-moxart.c
delete mode 100644 drivers/gpio/gpio-ts4800.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index f73f26b..df6ca48 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -152,13 +152,6 @@ config GPIO_BRCMSTB
help
Say yes here to enable GPIO support for Broadcom STB (BCM7XXX) SoCs.
-config GPIO_CLPS711X
- tristate "CLPS711X GPIO support"
- depends on ARCH_CLPS711X || COMPILE_TEST
- select GPIO_GENERIC
- help
- Say yes here to support GPIO on CLPS711X SoCs.
-
config GPIO_DAVINCI
bool "TI Davinci/Keystone GPIO support"
default y if ARCH_DAVINCI
@@ -194,22 +187,18 @@ config GPIO_ETRAXFS
help
Say yes here to support the GPIO controller on Axis ETRAX FS SoCs.
-config GPIO_GE_FPGA
- bool "GE FPGA based GPIO"
- depends on GE_FPGA
- select GPIO_GENERIC
- help
- Support for common GPIO functionality provided on some GE Single Board
- Computers.
-
- This driver provides basic support (configure as input or output, read
- and write pin state) for GPIO implemented in a number of GE single
- board computers.
-
config GPIO_GENERIC_PLATFORM
tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
select GPIO_GENERIC
help
+ Select this to support many generic memory-mapped GPIO controllers.
+
+ This driver also includes support for the following GPIOs:
+ CLPS711X SoCs
+ MOXA ART SoC
+ TS-4800 FPGA DIO blocks and compatibles.
+ GPIOs found on some GE Single Board Computers.
+
Say yes here to support basic platform_device memory-mapped GPIO controllers.
config GPIO_GRGPIO
@@ -286,14 +275,6 @@ config GPIO_MM_LANTIQ
(EBU) found on Lantiq SoCs. The gpios are output only as they are
created by attaching a 16bit latch to the bus.
-config GPIO_MOXART
- bool "MOXART GPIO support"
- depends on ARCH_MOXART || COMPILE_TEST
- select GPIO_GENERIC
- help
- Select this option to enable GPIO driver for
- MOXA ART SoC devices.
-
config GPIO_MPC5200
def_bool y
depends on PPC_MPC52xx
@@ -405,14 +386,6 @@ config GPIO_TEGRA
default y
depends on ARCH_TEGRA || COMPILE_TEST
-config GPIO_TS4800
- tristate "TS-4800 DIO blocks and compatibles"
- depends on OF_GPIO
- depends on SOC_IMX51 || COMPILE_TEST
- select GPIO_GENERIC
- help
- This driver support TS-4800 FPGA GPIO controllers.
-
config GPIO_TZ1090
bool "Toumaz Xenif TZ1090 GPIO support"
depends on SOC_TZ1090
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 74eb1a7..f3856df 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -28,7 +28,6 @@ obj-$(CONFIG_GPIO_ATH79) += gpio-ath79.o
obj-$(CONFIG_GPIO_BCM_KONA) += gpio-bcm-kona.o
obj-$(CONFIG_GPIO_BRCMSTB) += gpio-brcmstb.o
obj-$(CONFIG_GPIO_BT8XX) += gpio-bt8xx.o
-obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
obj-$(CONFIG_GPIO_CRYSTAL_COVE) += gpio-crystalcove.o
obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o
@@ -40,7 +39,6 @@ obj-$(CONFIG_GPIO_EM) += gpio-em.o
obj-$(CONFIG_GPIO_EP93XX) += gpio-ep93xx.o
obj-$(CONFIG_GPIO_ETRAXFS) += gpio-etraxfs.o
obj-$(CONFIG_GPIO_F7188X) += gpio-f7188x.o
-obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o
obj-$(CONFIG_GPIO_GRGPIO) += gpio-grgpio.o
obj-$(CONFIG_GPIO_ICH) += gpio-ich.o
obj-$(CONFIG_GPIO_IOP) += gpio-iop.o
@@ -65,7 +63,6 @@ obj-$(CONFIG_GPIO_MC9S08DZ60) += gpio-mc9s08dz60.o
obj-$(CONFIG_GPIO_MCP23S08) += gpio-mcp23s08.o
obj-$(CONFIG_GPIO_ML_IOH) += gpio-ml-ioh.o
obj-$(CONFIG_GPIO_MM_LANTIQ) += gpio-mm-lantiq.o
-obj-$(CONFIG_GPIO_MOXART) += gpio-moxart.o
obj-$(CONFIG_GPIO_MPC5200) += gpio-mpc5200.o
obj-$(CONFIG_GPIO_MPC8XXX) += gpio-mpc8xxx.o
obj-$(CONFIG_GPIO_MSIC) += gpio-msic.o
@@ -104,7 +101,6 @@ obj-$(CONFIG_GPIO_TPS65218) += gpio-tps65218.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
-obj-$(CONFIG_GPIO_TS4800) += gpio-ts4800.o
obj-$(CONFIG_GPIO_TS5500) += gpio-ts5500.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o
diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c
deleted file mode 100644
index 5a69025..0000000
--- a/drivers/gpio/gpio-clps711x.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * CLPS711X GPIO driver
- *
- * Copyright (C) 2012,2013 Alexander Shiyan <shc_work@...l.ru>
- *
- * 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/module.h>
-#include <linux/gpio/driver.h>
-#include <linux/platform_device.h>
-
-static int clps711x_gpio_probe(struct platform_device *pdev)
-{
- struct device_node *np = pdev->dev.of_node;
- void __iomem *dat, *dir;
- struct gpio_chip *gc;
- struct resource *res;
- int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id;
-
- if ((id < 0) || (id > 4))
- return -ENODEV;
-
- gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
- if (!gc)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- dat = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dat))
- return PTR_ERR(dat);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- dir = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dir))
- return PTR_ERR(dir);
-
- switch (id) {
- case 3:
- /* PORTD is inverted logic for direction register */
- err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
- NULL, dir, 0);
- break;
- default:
- err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
- dir, NULL, 0);
- break;
- }
-
- if (err)
- return err;
-
- switch (id) {
- case 4:
- /* PORTE is 3 lines only */
- gc->ngpio = 3;
- break;
- default:
- break;
- }
-
- gc->base = id * 8;
- gc->owner = THIS_MODULE;
- platform_set_drvdata(pdev, gc);
-
- return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
-}
-
-static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
- { .compatible = "cirrus,clps711x-gpio" },
- { }
-};
-MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
-
-static struct platform_driver clps711x_gpio_driver = {
- .driver = {
- .name = "clps711x-gpio",
- .of_match_table = of_match_ptr(clps711x_gpio_ids),
- },
- .probe = clps711x_gpio_probe,
-};
-module_platform_driver(clps711x_gpio_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alexander Shiyan <shc_work@...l.ru>");
-MODULE_DESCRIPTION("CLPS711X GPIO driver");
-MODULE_ALIAS("platform:clps711x-gpio");
diff --git a/drivers/gpio/gpio-ge.c b/drivers/gpio/gpio-ge.c
deleted file mode 100644
index 8650b29..0000000
--- a/drivers/gpio/gpio-ge.c
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- * Driver for GE FPGA based GPIO
- *
- * Author: Martyn Welch <martyn.welch@...com>
- *
- * 2008 (c) GE Intelligent Platforms Embedded Systems, Inc.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-/* TODO
- *
- * Configuration of output modes (totem-pole/open-drain)
- * Interrupt configuration - interrupts are always generated the FPGA relies on
- * the I/O interrupt controllers mask to stop them propergating
- */
-
-#include <linux/kernel.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
-#include <linux/of_address.h>
-#include <linux/module.h>
-#include <linux/gpio/driver.h>
-
-#define GEF_GPIO_DIRECT 0x00
-#define GEF_GPIO_IN 0x04
-#define GEF_GPIO_OUT 0x08
-#define GEF_GPIO_TRIG 0x0C
-#define GEF_GPIO_POLAR_A 0x10
-#define GEF_GPIO_POLAR_B 0x14
-#define GEF_GPIO_INT_STAT 0x18
-#define GEF_GPIO_OVERRUN 0x1C
-#define GEF_GPIO_MODE 0x20
-
-static const struct of_device_id gef_gpio_ids[] = {
- {
- .compatible = "gef,sbc610-gpio",
- .data = (void *)19,
- }, {
- .compatible = "gef,sbc310-gpio",
- .data = (void *)6,
- }, {
- .compatible = "ge,imp3a-gpio",
- .data = (void *)16,
- },
- { }
-};
-MODULE_DEVICE_TABLE(of, gef_gpio_ids);
-
-static int __init gef_gpio_probe(struct platform_device *pdev)
-{
- const struct of_device_id *of_id =
- of_match_device(gef_gpio_ids, &pdev->dev);
- struct gpio_chip *gc;
- void __iomem *regs;
- int ret;
-
- gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
- if (!gc)
- return -ENOMEM;
-
- regs = of_iomap(pdev->dev.of_node, 0);
- if (!regs)
- return -ENOMEM;
-
- ret = bgpio_init(gc, &pdev->dev, 4, regs + GEF_GPIO_IN,
- regs + GEF_GPIO_OUT, NULL, NULL,
- regs + GEF_GPIO_DIRECT, BGPIOF_BIG_ENDIAN_BYTE_ORDER);
- if (ret) {
- dev_err(&pdev->dev, "bgpio_init failed\n");
- goto err0;
- }
-
- /* Setup pointers to chip functions */
- gc->label = devm_kstrdup(&pdev->dev, pdev->dev.of_node->full_name,
- GFP_KERNEL);
- if (!gc->label) {
- ret = -ENOMEM;
- goto err0;
- }
-
- gc->base = -1;
- gc->ngpio = (u16)(uintptr_t)of_id->data;
- gc->of_gpio_n_cells = 2;
- gc->of_node = pdev->dev.of_node;
-
- /* This function adds a memory mapped GPIO chip */
- ret = devm_gpiochip_add_data(&pdev->dev, gc, NULL);
- if (ret)
- goto err0;
-
- return 0;
-err0:
- iounmap(regs);
- pr_err("%s: GPIO chip registration failed\n",
- pdev->dev.of_node->full_name);
- return ret;
-};
-
-static struct platform_driver gef_gpio_driver = {
- .driver = {
- .name = "gef-gpio",
- .of_match_table = gef_gpio_ids,
- },
-};
-module_platform_driver_probe(gef_gpio_driver, gef_gpio_probe);
-
-MODULE_DESCRIPTION("GE I/O FPGA GPIO driver");
-MODULE_AUTHOR("Martyn Welch <martyn.welch@...com");
-MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index 129c3ba..54afd44 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -609,10 +609,144 @@ static int bgpio_basic_mmio_parse_dt(struct platform_device *pdev,
return 0;
}
+static int clps711x_parse_dt(struct platform_device *pdev,
+ struct bgpio_pdata *pdata,
+ unsigned long *flags)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int id = np ? of_alias_get_id(np, "gpio") : pdev->id;
+ struct resource *res;
+
+ if ((id < 0) || (id > 4))
+ return -ENODEV;
+
+ /* PORTE is 3 lines only */
+ if (id == 4)
+ pdata->ngpio = 3;
+
+ pdata->base = id * 8;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ res->name = "dat";
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res)
+ return -EINVAL;
+
+ /* PORTD is inverted logic for direction register */
+ res->name = (id == 3) ? "dirin" : "dirout";
+ return 0;
+}
+
+static int ge_parse_dt(struct platform_device *pdev,
+ struct bgpio_pdata *pdata,
+ unsigned long *flags)
+{
+ struct device_node *np = pdev->dev.of_node;
+
+ struct resource *res;
+ struct resource nres[] = {
+ DEFINE_RES_MEM_NAMED(0, 1, "dat"),
+ DEFINE_RES_MEM_NAMED(0, 1, "set"),
+ DEFINE_RES_MEM_NAMED(0, 1, "dirin"),
+ };
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res || resource_size(res) != 0x24)
+ return -EINVAL;
+
+ nres[0].start = res->start + 0x04;
+ nres[0].end = nres[0].start + 3;
+ nres[1].start = res->start + 0x08;
+ nres[1].end = nres[1].start + 3;
+ nres[2].start = res->start + 0x00;
+ nres[2].end = nres[2].start + 3;
+ *flags |= BGPIOF_BIG_ENDIAN_BYTE_ORDER;
+ pdata->label = devm_kstrdup(&pdev->dev, np->full_name, GFP_KERNEL);
+ if (!pdata->label)
+ return -ENOMEM;
+
+ if (of_device_is_compatible(np, "ge,imp3a-gpio"))
+ pdata->ngpio = 16;
+ else if (of_device_is_compatible(np, "gef,sbc310-gpio"))
+ pdata->ngpio = 6;
+ else if (of_device_is_compatible(np, "gef,sbc610-gpio"))
+ pdata->ngpio = 19;
+
+ return platform_device_add_resources(pdev, nres, ARRAY_SIZE(nres));
+}
+
+static int moxart_parse_dt(struct platform_device *pdev,
+ struct bgpio_pdata *pdata,
+ unsigned long *flags)
+{
+ struct resource *res;
+ struct resource nres[] = {
+ DEFINE_RES_MEM_NAMED(0, 1, "dat"),
+ DEFINE_RES_MEM_NAMED(0, 1, "set"),
+ DEFINE_RES_MEM_NAMED(0, 1, "dirout"),
+ };
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res || resource_size(res) != 0xc)
+ return -EINVAL;
+
+ pdata->label = "moxart-gpio";
+ *flags |= BGPIOF_READ_OUTPUT_REG_SET;
+ nres[0].start = res->start + 0x04;
+ nres[0].end = nres[0].start + 3;
+ nres[1].start = res->start + 0x00;
+ nres[1].end = nres[1].start + 3;
+ nres[2].start = res->start + 0x08;
+ nres[2].end = nres[2].start + 3;
+ return platform_device_add_resources(pdev, nres, ARRAY_SIZE(nres));
+}
+
+static int ts4800_parse_dt(struct platform_device *pdev,
+ struct bgpio_pdata *pdata,
+ unsigned long *flags)
+{
+ int err;
+ struct resource *res;
+ struct resource nres[] = {
+ DEFINE_RES_MEM_NAMED(0, 1, "dat"),
+ DEFINE_RES_MEM_NAMED(0, 1, "set"),
+ DEFINE_RES_MEM_NAMED(0, 1, "dirout"),
+ };
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res || resource_size(res) != 0x6)
+ return -EINVAL;
+
+ nres[0].start = res->start;
+ nres[0].end = nres[0].start + 1;
+ nres[1].start = res->start + 0x02;
+ nres[1].end = nres[1].start + 1;
+ nres[2].start = res->start + 0x04;
+ nres[2].end = nres[2].start + 1;
+
+ err = of_property_read_u32(pdev->dev.of_node, "ngpios", &pdata->ngpio);
+ if (err == -EINVAL)
+ pdata->ngpio = 16;
+ else if (err)
+ return err;
+
+ return platform_device_add_resources(pdev, nres, ARRAY_SIZE(nres));
+}
+
#define ADD(_name, _func) { .compatible = _name, .data = _func }
static const struct of_device_id bgpio_of_match[] = {
ADD("linux,gpio-mmio", bgpio_basic_mmio_parse_dt),
+ ADD("cirrus,clps711x-gpio", clps711x_parse_dt),
+ ADD("ge,imp3a-gpio", ge_parse_dt),
+ ADD("gef,sbc310-gpio", ge_parse_dt),
+ ADD("gef,sbc610-gpio", ge_parse_dt),
+ ADD("moxa,moxart-gpio", moxart_parse_dt),
+ ADD("technologic,ts4800-gpio", ts4800_parse_dt),
{ }
};
#undef ADD
diff --git a/drivers/gpio/gpio-moxart.c b/drivers/gpio/gpio-moxart.c
deleted file mode 100644
index d58d389..0000000
--- a/drivers/gpio/gpio-moxart.c
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * MOXA ART SoCs GPIO driver.
- *
- * Copyright (C) 2013 Jonas Jensen
- *
- * Jonas Jensen <jonas.jensen@...il.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/of_address.h>
-#include <linux/of_gpio.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/bitops.h>
-#include <linux/gpio/driver.h>
-
-#define GPIO_DATA_OUT 0x00
-#define GPIO_DATA_IN 0x04
-#define GPIO_PIN_DIRECTION 0x08
-
-static int moxart_gpio_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct resource *res;
- struct gpio_chip *gc;
- void __iomem *base;
- int ret;
-
- gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL);
- if (!gc)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_ioremap_resource(dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
-
- ret = bgpio_init(gc, dev, 4, base + GPIO_DATA_IN,
- base + GPIO_DATA_OUT, NULL,
- base + GPIO_PIN_DIRECTION, NULL,
- BGPIOF_READ_OUTPUT_REG_SET);
- if (ret) {
- dev_err(&pdev->dev, "bgpio_init failed\n");
- return ret;
- }
-
- gc->label = "moxart-gpio";
- gc->request = gpiochip_generic_request;
- gc->free = gpiochip_generic_free;
- gc->base = 0;
- gc->owner = THIS_MODULE;
-
- ret = devm_gpiochip_add_data(dev, gc, NULL);
- if (ret) {
- dev_err(dev, "%s: gpiochip_add failed\n",
- dev->of_node->full_name);
- return ret;
- }
-
- return ret;
-}
-
-static const struct of_device_id moxart_gpio_match[] = {
- { .compatible = "moxa,moxart-gpio" },
- { }
-};
-
-static struct platform_driver moxart_gpio_driver = {
- .driver = {
- .name = "moxart-gpio",
- .of_match_table = moxart_gpio_match,
- },
- .probe = moxart_gpio_probe,
-};
-builtin_platform_driver(moxart_gpio_driver);
diff --git a/drivers/gpio/gpio-ts4800.c b/drivers/gpio/gpio-ts4800.c
deleted file mode 100644
index 0c144a7..0000000
--- a/drivers/gpio/gpio-ts4800.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * GPIO driver for the TS-4800 board
- *
- * Copyright (c) 2016 - Savoir-faire Linux
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/gpio/driver.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-
-#define DEFAULT_PIN_NUMBER 16
-#define INPUT_REG_OFFSET 0x00
-#define OUTPUT_REG_OFFSET 0x02
-#define DIRECTION_REG_OFFSET 0x04
-
-static int ts4800_gpio_probe(struct platform_device *pdev)
-{
- struct device_node *node;
- struct gpio_chip *chip;
- struct resource *res;
- void __iomem *base_addr;
- int retval;
- u32 ngpios;
-
- chip = devm_kzalloc(&pdev->dev, sizeof(struct gpio_chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base_addr = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(base_addr))
- return PTR_ERR(base_addr);
-
- node = pdev->dev.of_node;
- if (!node)
- return -EINVAL;
-
- retval = of_property_read_u32(node, "ngpios", &ngpios);
- if (retval == -EINVAL)
- ngpios = DEFAULT_PIN_NUMBER;
- else if (retval)
- return retval;
-
- retval = bgpio_init(chip, &pdev->dev, 2, base_addr + INPUT_REG_OFFSET,
- base_addr + OUTPUT_REG_OFFSET, NULL,
- base_addr + DIRECTION_REG_OFFSET, NULL, 0);
- if (retval) {
- dev_err(&pdev->dev, "bgpio_init failed\n");
- return retval;
- }
-
- chip->ngpio = ngpios;
-
- platform_set_drvdata(pdev, chip);
-
- return devm_gpiochip_add_data(&pdev->dev, chip, NULL);
-}
-
-static const struct of_device_id ts4800_gpio_of_match[] = {
- { .compatible = "technologic,ts4800-gpio", },
- {},
-};
-
-static struct platform_driver ts4800_gpio_driver = {
- .driver = {
- .name = "ts4800-gpio",
- .of_match_table = ts4800_gpio_of_match,
- },
- .probe = ts4800_gpio_probe,
-};
-
-module_platform_driver_probe(ts4800_gpio_driver, ts4800_gpio_probe);
-
-MODULE_AUTHOR("Julien Grossholtz <julien.grossholtz@...oirfairelinux.com>");
-MODULE_DESCRIPTION("TS4800 FPGA GPIO driver");
-MODULE_LICENSE("GPL v2");
--
2.8.1
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