From 8f55fed3c98ced66fff21a41e57fd1784f4fd723 Mon Sep 17 00:00:00 2001 From: Jonathan Neuschäfer Date: Fri, 9 Feb 2018 13:07:29 +0100 Subject: gpio: Add GPIO driver for Nintendo Wii MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Nintendo Wii's chipset (called "Hollywood") has a GPIO controller that supports a configurable number of pins (up to 32), interrupts, and some special mechanisms to share the controller between the system's security processor (an ARM926) and the PowerPC CPU. Pin multiplexing is not supported. This patch adds a basic driver for this GPIO controller. Interrupt support will come in a later patch. This patch is based on code developed by Albert Herranz and the GameCube Linux Team, file arch/powerpc/platforms/embedded6xx/hlwd-gpio.c, available at https://github.com/DeltaResero/GC-Wii-Linux-Kernels, but has grown quite dissimilar. v3: - Do some style cleanups, as suggest by Andy Shevchenko v2: - Change hlwd_gpio_driver.driver.name to "gpio-hlwd" to match the filename (was "hlwd_gpio") - Remove unnecessary include of linux/of_gpio.h, as suggested by Linus Walleij. - Add struct device pointer to context struct to make it possible to use dev_info(hlwd->dev, "..."), as suggested by Linus Walleij - Use the GPIO_GENERIC library to reduce code size, as suggested by Linus Walleij - Use iowrite32be instead of __raw_writel for big-endian MMIO access, as suggested by Linus Walleij - Remove commit message paragraph suggesting to diff against the original driver, because it's so different now Signed-off-by: Jonathan Neuschäfer Cc: Albert Herranz Reviewed-by: Segher Boessenkool Reviewed-by: Andy Shevchenko Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/gpio/Kconfig') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index fd0562a37f68..13728dd639e6 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -232,6 +232,15 @@ config GPIO_GRGPIO Select this to support Aeroflex Gaisler GRGPIO cores from the GRLIB VHDL IP core library. +config GPIO_HLWD + tristate "Nintendo Wii (Hollywood) GPIO" + depends on OF_GPIO + select GPIO_GENERIC + help + Select this to support the GPIO controller of the Nintendo Wii. + + If unsure, say N. + config GPIO_ICH tristate "Intel ICH GPIO" depends on PCI && X86 -- cgit v1.2.3