From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 13.mo4.mail-out.ovh.net ([178.33.251.8] helo=mo4.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TLY4c-0007Mq-H5 for barebox@lists.infradead.org; Tue, 09 Oct 2012 11:34:09 +0000 Received: from mail428.ha.ovh.net (b9.ovh.net [213.186.33.59]) by mo4.mail-out.ovh.net (Postfix) with SMTP id E6A22104F4C5 for ; Tue, 9 Oct 2012 13:40:29 +0200 (CEST) Date: Tue, 9 Oct 2012 13:31:42 +0200 From: Jean-Christophe PLAGNIOL-VILLARD Message-ID: <20121009113142.GD26553@game.jcrosoft.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1349734061-32339-6-git-send-email-carlo.caione@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 5/5] Add support for GPIO (BCM2835/Raspberry-Pi) References: <1349734061-32339-1-git-send-email-carlo.caione@gmail.com> <1349734061-32339-6-git-send-email-carlo.caione@gmail.com> To: Carlo Caione Cc: barebox@lists.infradead.org On 00:07 Tue 09 Oct , Carlo Caione wrote: > Signed-off-by: Carlo Caione > --- > drivers/gpio/Kconfig | 3 + > drivers/gpio/Makefile | 1 + > drivers/gpio/gpio-bcm2835.c | 157 ++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 161 insertions(+) > create mode 100644 drivers/gpio/gpio-bcm2835.c > > diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig > index a0e9b58..aa27c0e 100644 > --- a/drivers/gpio/Kconfig > +++ b/drivers/gpio/Kconfig > @@ -6,6 +6,9 @@ if GPIOLIB > > menu "GPIO " > > +config GPIO_BCM2835 > + bool "GPIO support for BCM2835" depends on ARHC_Bxxx > + > config GPIO_PL061 > bool "PrimeCell PL061 GPIO support" > depends on ARM_AMBA > diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile > index e2e97d3..aecdf24 100644 > --- a/drivers/gpio/Makefile > +++ b/drivers/gpio/Makefile > @@ -1,4 +1,5 @@ > obj-$(CONFIG_GPIOLIB) += gpio.o > > +obj-$(CONFIG_GPIO_BCM2835) += gpio-bcm2835.o > obj-$(CONFIG_GPIO_PL061) += gpio-pl061.o > obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o > diff --git a/drivers/gpio/gpio-bcm2835.c b/drivers/gpio/gpio-bcm2835.c > new file mode 100644 > index 0000000..8ee7086 > --- /dev/null > +++ b/drivers/gpio/gpio-bcm2835.c > @@ -0,0 +1,157 @@ > +/* > + * Author: Carlo Caione > + * > + * Based on linux/arch/arm/mach-bcm2708/bcm2708_gpio.c > + * > + * 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. > + * > + * 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. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, > + * MA 02111-1307 USA > + * > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define GPIOFSEL(x) (0x00+(x)*4) > +#define GPIOSET(x) (0x1c+(x)*4) > +#define GPIOCLR(x) (0x28+(x)*4) > +#define GPIOLEV(x) (0x34+(x)*4) > +#define GPIOEDS(x) (0x40+(x)*4) > +#define GPIOREN(x) (0x4c+(x)*4) > +#define GPIOFEN(x) (0x58+(x)*4) > +#define GPIOHEN(x) (0x64+(x)*4) > +#define GPIOLEN(x) (0x70+(x)*4) > +#define GPIOAREN(x) (0x7c+(x)*4) > +#define GPIOAFEN(x) (0x88+(x)*4) > +#define GPIOUD(x) (0x94+(x)*4) > +#define GPIOUDCLK(x) (0x98+(x)*4) > + > +enum { > + GPIO_FSEL_INPUT, GPIO_FSEL_OUTPUT, > + GPIO_FSEL_ALT5, GPIO_FSEL_ALT_4, > + GPIO_FSEL_ALT0, GPIO_FSEL_ALT1, > + GPIO_FSEL_ALT2, GPIO_FSEL_ALT3, > +}; > + > +struct bcm2835_gpio_chip { > + void __iomem *base; > + struct gpio_chip chip; > +}; > + > +static int bcm2835_set_function(struct gpio_chip *chip, unsigned gpio, int function) > +{ you should add one bank pre gpio_chip > + struct bcm2835_gpio_chip *bcmgpio = container_of(chip, struct bcm2835_gpio_chip, chip); > + void __iomem *base = bcmgpio->base; > + unsigned gpiodir; > + unsigned gpio_bank = gpio / 10; > + unsigned gpio_field_offset = (gpio - 10 * gpio_bank) * 3; so this will be dropped > + > + gpiodir = readl(base + GPIOFSEL(gpio_bank)); > + gpiodir &= ~(7 << gpio_field_offset); > + gpiodir |= function << gpio_field_offset; > + writel(gpiodir, base + GPIOFSEL(gpio_bank)); > + gpiodir = readl(base + GPIOFSEL(gpio_bank)); > + > + return 0; > +} > + _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox