From f63cf88fd88b9d01063338d1f05381800660952e Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 9 Aug 2019 22:27:44 +0200 Subject: ARM: remove w90x900 platform This removes the old Winbond w90x900 platform, also known as Nuvoton NUC900. Wan Zongshun originally contributed the port and maintained it since then. From all I can tell, this platform is no longer being used with modern kernels, based on various indications: - The supported chips (nuc910/950/960) are no longer marketed by the manufacturer - Newer chips from the same family (nuc97x, nuc980, n329x) that are still marketed have Linux BSPs but those were never submitted for upstream inclusion. - The last patch from the platform maintainer was in 2011. - All patches to w90x900 platform specific files afterwards are cleanups that were apparently done without access to test hardware. - Both the website and the email address listed in the MAINTAINERS have become unreachable. Link: https://lore.kernel.org/r/20190809202749.742267-17-arnd@arndb.de Cc: "Wanzongshun (Vincent)" Signed-off-by: Arnd Bergmann --- arch/arm/mach-w90x900/gpio.c | 150 ------------------------------------------- 1 file changed, 150 deletions(-) delete mode 100644 arch/arm/mach-w90x900/gpio.c (limited to 'arch/arm/mach-w90x900/gpio.c') diff --git a/arch/arm/mach-w90x900/gpio.c b/arch/arm/mach-w90x900/gpio.c deleted file mode 100644 index cb5df211f1ed..000000000000 --- a/arch/arm/mach-w90x900/gpio.c +++ /dev/null @@ -1,150 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/arch/arm/mach-w90x900/gpio.c - * - * Generic nuc900 GPIO handling - * - * Wan ZongShun - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include - -#define GPIO_BASE (W90X900_VA_GPIO) -#define GPIO_DIR (0x04) -#define GPIO_OUT (0x08) -#define GPIO_IN (0x0C) -#define GROUPINERV (0x10) -#define GPIO_GPIO(Nb) (0x00000001 << (Nb)) - -#define NUC900_GPIO_CHIP(name, base_gpio, nr_gpio) \ - { \ - .chip = { \ - .label = name, \ - .direction_input = nuc900_dir_input, \ - .direction_output = nuc900_dir_output, \ - .get = nuc900_gpio_get, \ - .set = nuc900_gpio_set, \ - .base = base_gpio, \ - .ngpio = nr_gpio, \ - } \ - } - -struct nuc900_gpio_chip { - struct gpio_chip chip; - void __iomem *regbase; /* Base of group register*/ - spinlock_t gpio_lock; -}; - -static int nuc900_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip); - void __iomem *pio = nuc900_gpio->regbase + GPIO_IN; - unsigned int regval; - - regval = __raw_readl(pio); - regval &= GPIO_GPIO(offset); - - return (regval != 0); -} - -static void nuc900_gpio_set(struct gpio_chip *chip, unsigned offset, int val) -{ - struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip); - void __iomem *pio = nuc900_gpio->regbase + GPIO_OUT; - unsigned int regval; - unsigned long flags; - - spin_lock_irqsave(&nuc900_gpio->gpio_lock, flags); - - regval = __raw_readl(pio); - - if (val) - regval |= GPIO_GPIO(offset); - else - regval &= ~GPIO_GPIO(offset); - - __raw_writel(regval, pio); - - spin_unlock_irqrestore(&nuc900_gpio->gpio_lock, flags); -} - -static int nuc900_dir_input(struct gpio_chip *chip, unsigned offset) -{ - struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip); - void __iomem *pio = nuc900_gpio->regbase + GPIO_DIR; - unsigned int regval; - unsigned long flags; - - spin_lock_irqsave(&nuc900_gpio->gpio_lock, flags); - - regval = __raw_readl(pio); - regval &= ~GPIO_GPIO(offset); - __raw_writel(regval, pio); - - spin_unlock_irqrestore(&nuc900_gpio->gpio_lock, flags); - - return 0; -} - -static int nuc900_dir_output(struct gpio_chip *chip, unsigned offset, int val) -{ - struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip); - void __iomem *outreg = nuc900_gpio->regbase + GPIO_OUT; - void __iomem *pio = nuc900_gpio->regbase + GPIO_DIR; - unsigned int regval; - unsigned long flags; - - spin_lock_irqsave(&nuc900_gpio->gpio_lock, flags); - - regval = __raw_readl(pio); - regval |= GPIO_GPIO(offset); - __raw_writel(regval, pio); - - regval = __raw_readl(outreg); - - if (val) - regval |= GPIO_GPIO(offset); - else - regval &= ~GPIO_GPIO(offset); - - __raw_writel(regval, outreg); - - spin_unlock_irqrestore(&nuc900_gpio->gpio_lock, flags); - - return 0; -} - -static struct nuc900_gpio_chip nuc900_gpio[] = { - NUC900_GPIO_CHIP("GROUPC", 0, 16), - NUC900_GPIO_CHIP("GROUPD", 16, 10), - NUC900_GPIO_CHIP("GROUPE", 26, 14), - NUC900_GPIO_CHIP("GROUPF", 40, 10), - NUC900_GPIO_CHIP("GROUPG", 50, 17), - NUC900_GPIO_CHIP("GROUPH", 67, 8), - NUC900_GPIO_CHIP("GROUPI", 75, 17), -}; - -void __init nuc900_init_gpio(int nr_group) -{ - unsigned i; - struct nuc900_gpio_chip *gpio_chip; - - for (i = 0; i < nr_group; i++) { - gpio_chip = &nuc900_gpio[i]; - spin_lock_init(&gpio_chip->gpio_lock); - gpio_chip->regbase = GPIO_BASE + i * GROUPINERV; - gpiochip_add_data(&gpio_chip->chip, gpio_chip); - } -} -- cgit v1.2.3