diff options
author | Arnd Bergmann <arnd@arndb.de> | 2013-04-08 18:26:15 +0200 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2013-04-08 18:26:15 +0200 |
commit | e9069cf8b74b50d804fd540a9fd1383504f4af93 (patch) | |
tree | 0b3a30308ffc00a73f681bfdf19214b5ba9ae5a6 /drivers/gpio | |
parent | 4680ebc2c90f663ba70c6bb3d8596b0f2c4dfa9e (diff) | |
parent | ce63d6d4bb9f601de32d4b99f925a65182521873 (diff) | |
download | op-kernel-dev-e9069cf8b74b50d804fd540a9fd1383504f4af93.zip op-kernel-dev-e9069cf8b74b50d804fd540a9fd1383504f4af93.tar.gz |
Merge tag 'vt8500/pinctrl' of git://server.prisktech.co.nz/git/linuxwmt into next/drivers
From Tony Prisk <linux@prisktech.co.nz>:
arm: vt8500: Add pinctrl driver for arch-vt8500
This series adds support for the pinctrl/gpio module on all arch-vt8500
supported SoCs.
As part of the review process, some tidy up is also done to
drivers/of/base.c to remove some code that is being constantly duplicated.
Also, a patch for the bcm2835 pinctrl driver is included to take advantage
of the new of/base.c code.
* tag 'vt8500/pinctrl' of git://server.prisktech.co.nz/git/linuxwmt: (606 commits)
pinctrl: bcm2835: make use of of_property_read_u32_index()
gpio: vt8500: Remove arch-vt8500 gpio driver
arm: vt8500: Remove gpio devicetree nodes
arm: dts: vt8500: Update Wondermedia SoC dtsi files for pinctrl driver
pinctrl: gpio: vt8500: Add pincontrol driver for arch-vt8500
arm: vt8500: Increase available GPIOs on arch-vt8500
of: Remove duplicated code for validating property and value
of: Add support for reading a u32 from a multi-value property.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/gpio')
-rw-r--r-- | drivers/gpio/Kconfig | 6 | ||||
-rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
-rw-r--r-- | drivers/gpio/gpio-mvebu.c | 7 | ||||
-rw-r--r-- | drivers/gpio/gpio-vt8500.c | 355 |
4 files changed, 7 insertions, 362 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 93aaadf..b166e30 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -227,12 +227,6 @@ config GPIO_TS5500 blocks of the TS-5500: DIO1, DIO2 and the LCD port, and the TS-5600 LCD port. -config GPIO_VT8500 - bool "VIA/Wondermedia SoC GPIO Support" - depends on ARCH_VT8500 - help - Say yes here to support the VT8500/WM8505/WM8650 GPIO controller. - config GPIO_XILINX bool "Xilinx GPIO support" depends on PPC_OF || MICROBLAZE diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 22e07bc..a274d7d 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -80,7 +80,6 @@ obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o obj-$(CONFIG_GPIO_VIPERBOARD) += gpio-viperboard.o obj-$(CONFIG_GPIO_VR41XX) += gpio-vr41xx.o -obj-$(CONFIG_GPIO_VT8500) += gpio-vt8500.o obj-$(CONFIG_GPIO_VX855) += gpio-vx855.o obj-$(CONFIG_GPIO_WM831X) += gpio-wm831x.o obj-$(CONFIG_GPIO_WM8350) += gpio-wm8350.o diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index 7472182..61a6fde 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -42,6 +42,7 @@ #include <linux/io.h> #include <linux/of_irq.h> #include <linux/of_device.h> +#include <linux/clk.h> #include <linux/pinctrl/consumer.h> /* @@ -496,6 +497,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev) struct resource *res; struct irq_chip_generic *gc; struct irq_chip_type *ct; + struct clk *clk; unsigned int ngpios; int soc_variant; int i, cpu, id; @@ -529,6 +531,11 @@ static int mvebu_gpio_probe(struct platform_device *pdev) return id; } + clk = devm_clk_get(&pdev->dev, NULL); + /* Not all SoCs require a clock.*/ + if (!IS_ERR(clk)) + clk_prepare_enable(clk); + mvchip->soc_variant = soc_variant; mvchip->chip.label = dev_name(&pdev->dev); mvchip->chip.dev = &pdev->dev; diff --git a/drivers/gpio/gpio-vt8500.c b/drivers/gpio/gpio-vt8500.c deleted file mode 100644 index 81683ca..0000000 --- a/drivers/gpio/gpio-vt8500.c +++ /dev/null @@ -1,355 +0,0 @@ -/* drivers/gpio/gpio-vt8500.c - * - * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> - * Based on arch/arm/mach-vt8500/gpio.c: - * - Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - */ - -#include <linux/module.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/gpio.h> -#include <linux/platform_device.h> -#include <linux/bitops.h> -#include <linux/of.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/of_device.h> - -/* - We handle GPIOs by bank, each bank containing up to 32 GPIOs covered - by one set of registers (although not all may be valid). - - Because different SoC's have different register offsets, we pass the - register offsets as data in vt8500_gpio_dt_ids[]. - - A value of NO_REG is used to indicate that this register is not - supported. Only used for ->en at the moment. -*/ - -#define NO_REG 0xFFFF - -/* - * struct vt8500_gpio_bank_regoffsets - * @en: offset to enable register of the bank - * @dir: offset to direction register of the bank - * @data_out: offset to the data out register of the bank - * @data_in: offset to the data in register of the bank - * @ngpio: highest valid pin in this bank - */ - -struct vt8500_gpio_bank_regoffsets { - unsigned int en; - unsigned int dir; - unsigned int data_out; - unsigned int data_in; - unsigned char ngpio; -}; - -struct vt8500_gpio_data { - unsigned int num_banks; - struct vt8500_gpio_bank_regoffsets banks[]; -}; - -#define VT8500_BANK(__en, __dir, __out, __in, __ngpio) \ -{ \ - .en = __en, \ - .dir = __dir, \ - .data_out = __out, \ - .data_in = __in, \ - .ngpio = __ngpio, \ -} - -static struct vt8500_gpio_data vt8500_data = { - .num_banks = 7, - .banks = { - VT8500_BANK(NO_REG, 0x3C, 0x5C, 0x7C, 9), - VT8500_BANK(0x00, 0x20, 0x40, 0x60, 26), - VT8500_BANK(0x04, 0x24, 0x44, 0x64, 28), - VT8500_BANK(0x08, 0x28, 0x48, 0x68, 31), - VT8500_BANK(0x0C, 0x2C, 0x4C, 0x6C, 19), - VT8500_BANK(0x10, 0x30, 0x50, 0x70, 19), - VT8500_BANK(0x14, 0x34, 0x54, 0x74, 23), - }, -}; - -static struct vt8500_gpio_data wm8505_data = { - .num_banks = 10, - .banks = { - VT8500_BANK(0x64, 0x8C, 0xB4, 0xDC, 22), - VT8500_BANK(0x40, 0x68, 0x90, 0xB8, 8), - VT8500_BANK(0x44, 0x6C, 0x94, 0xBC, 32), - VT8500_BANK(0x48, 0x70, 0x98, 0xC0, 6), - VT8500_BANK(0x4C, 0x74, 0x9C, 0xC4, 16), - VT8500_BANK(0x50, 0x78, 0xA0, 0xC8, 25), - VT8500_BANK(0x54, 0x7C, 0xA4, 0xCC, 5), - VT8500_BANK(0x58, 0x80, 0xA8, 0xD0, 5), - VT8500_BANK(0x5C, 0x84, 0xAC, 0xD4, 12), - VT8500_BANK(0x60, 0x88, 0xB0, 0xD8, 16), - VT8500_BANK(0x500, 0x504, 0x508, 0x50C, 6), - }, -}; - -/* - * No information about which bits are valid so we just make - * them all available until its figured out. - */ -static struct vt8500_gpio_data wm8650_data = { - .num_banks = 9, - .banks = { - VT8500_BANK(0x40, 0x80, 0xC0, 0x00, 32), - VT8500_BANK(0x44, 0x84, 0xC4, 0x04, 32), - VT8500_BANK(0x48, 0x88, 0xC8, 0x08, 32), - VT8500_BANK(0x4C, 0x8C, 0xCC, 0x0C, 32), - VT8500_BANK(0x50, 0x90, 0xD0, 0x10, 32), - VT8500_BANK(0x54, 0x94, 0xD4, 0x14, 32), - VT8500_BANK(0x58, 0x98, 0xD8, 0x18, 32), - VT8500_BANK(0x5C, 0x9C, 0xDC, 0x1C, 32), - VT8500_BANK(0x7C, 0xBC, 0xFC, 0x3C, 32), - VT8500_BANK(0x500, 0x504, 0x508, 0x50C, 6), - }, -}; - -struct vt8500_gpio_chip { - struct gpio_chip chip; - - const struct vt8500_gpio_bank_regoffsets *regs; - void __iomem *base; -}; - -struct vt8500_data { - struct vt8500_gpio_chip *chip; - void __iomem *iobase; - int num_banks; -}; - - -#define to_vt8500(__chip) container_of(__chip, struct vt8500_gpio_chip, chip) - -static int vt8500_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - u32 val; - struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); - - if (vt8500_chip->regs->en == NO_REG) - return 0; - - val = readl_relaxed(vt8500_chip->base + vt8500_chip->regs->en); - val |= BIT(offset); - writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->en); - - return 0; -} - -static void vt8500_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); - u32 val; - - if (vt8500_chip->regs->en == NO_REG) - return; - - val = readl_relaxed(vt8500_chip->base + vt8500_chip->regs->en); - val &= ~BIT(offset); - writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->en); -} - -static int vt8500_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); - - u32 val = readl_relaxed(vt8500_chip->base + vt8500_chip->regs->dir); - val &= ~BIT(offset); - writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->dir); - - return 0; -} - -static int vt8500_gpio_direction_output(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); - - u32 val = readl_relaxed(vt8500_chip->base + vt8500_chip->regs->dir); - val |= BIT(offset); - writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->dir); - - if (value) { - val = readl_relaxed(vt8500_chip->base + - vt8500_chip->regs->data_out); - val |= BIT(offset); - writel_relaxed(val, vt8500_chip->base + - vt8500_chip->regs->data_out); - } - return 0; -} - -static int vt8500_gpio_get_value(struct gpio_chip *chip, unsigned offset) -{ - struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); - - return (readl_relaxed(vt8500_chip->base + vt8500_chip->regs->data_in) >> - offset) & 1; -} - -static void vt8500_gpio_set_value(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct vt8500_gpio_chip *vt8500_chip = to_vt8500(chip); - - u32 val = readl_relaxed(vt8500_chip->base + - vt8500_chip->regs->data_out); - if (value) - val |= BIT(offset); - else - val &= ~BIT(offset); - - writel_relaxed(val, vt8500_chip->base + vt8500_chip->regs->data_out); -} - -static int vt8500_of_xlate(struct gpio_chip *gc, - const struct of_phandle_args *gpiospec, u32 *flags) -{ - /* bank if specificed in gpiospec->args[0] */ - if (flags) - *flags = gpiospec->args[2]; - - return gpiospec->args[1]; -} - -static int vt8500_add_chips(struct platform_device *pdev, void __iomem *base, - const struct vt8500_gpio_data *data) -{ - struct vt8500_data *priv; - struct vt8500_gpio_chip *vtchip; - struct gpio_chip *chip; - int i; - int pin_cnt = 0; - - priv = devm_kzalloc(&pdev->dev, sizeof(struct vt8500_data), GFP_KERNEL); - if (!priv) { - dev_err(&pdev->dev, "failed to allocate memory\n"); - return -ENOMEM; - } - - priv->chip = devm_kzalloc(&pdev->dev, - sizeof(struct vt8500_gpio_chip) * data->num_banks, - GFP_KERNEL); - if (!priv->chip) { - dev_err(&pdev->dev, "failed to allocate chip memory\n"); - return -ENOMEM; - } - - priv->iobase = base; - priv->num_banks = data->num_banks; - platform_set_drvdata(pdev, priv); - - vtchip = priv->chip; - - for (i = 0; i < data->num_banks; i++) { - vtchip[i].base = base; - vtchip[i].regs = &data->banks[i]; - - chip = &vtchip[i].chip; - - chip->of_xlate = vt8500_of_xlate; - chip->of_gpio_n_cells = 3; - chip->of_node = pdev->dev.of_node; - - chip->request = vt8500_gpio_request; - chip->free = vt8500_gpio_free; - chip->direction_input = vt8500_gpio_direction_input; - chip->direction_output = vt8500_gpio_direction_output; - chip->get = vt8500_gpio_get_value; - chip->set = vt8500_gpio_set_value; - chip->can_sleep = 0; - chip->base = pin_cnt; - chip->ngpio = data->banks[i].ngpio; - - pin_cnt += data->banks[i].ngpio; - - gpiochip_add(chip); - } - return 0; -} - -static struct of_device_id vt8500_gpio_dt_ids[] = { - { .compatible = "via,vt8500-gpio", .data = &vt8500_data, }, - { .compatible = "wm,wm8505-gpio", .data = &wm8505_data, }, - { .compatible = "wm,wm8650-gpio", .data = &wm8650_data, }, - { /* Sentinel */ }, -}; - -static int vt8500_gpio_probe(struct platform_device *pdev) -{ - int ret; - void __iomem *gpio_base; - struct resource *res; - const struct of_device_id *of_id = - of_match_device(vt8500_gpio_dt_ids, &pdev->dev); - - if (!of_id) { - dev_err(&pdev->dev, "No matching driver data\n"); - return -ENODEV; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "Unable to get IO resource\n"); - return -ENODEV; - } - - gpio_base = devm_request_and_ioremap(&pdev->dev, res); - if (!gpio_base) { - dev_err(&pdev->dev, "Unable to map GPIO registers\n"); - return -ENOMEM; - } - - ret = vt8500_add_chips(pdev, gpio_base, of_id->data); - - return ret; -} - -static int vt8500_gpio_remove(struct platform_device *pdev) -{ - int i; - int ret; - struct vt8500_data *priv = platform_get_drvdata(pdev); - struct vt8500_gpio_chip *vtchip = priv->chip; - - for (i = 0; i < priv->num_banks; i++) { - ret = gpiochip_remove(&vtchip[i].chip); - if (ret) - dev_warn(&pdev->dev, "gpiochip_remove returned %d\n", - ret); - } - - return 0; -} - -static struct platform_driver vt8500_gpio_driver = { - .probe = vt8500_gpio_probe, - .remove = vt8500_gpio_remove, - .driver = { - .name = "vt8500-gpio", - .owner = THIS_MODULE, - .of_match_table = vt8500_gpio_dt_ids, - }, -}; - -module_platform_driver(vt8500_gpio_driver); - -MODULE_DESCRIPTION("VT8500 GPIO Driver"); -MODULE_AUTHOR("Tony Prisk <linux@prisktech.co.nz>"); -MODULE_LICENSE("GPL v2"); -MODULE_DEVICE_TABLE(of, vt8500_gpio_dt_ids); |