On Thu, Nov 18, 2010 at 11:52 AM, Gregory Bean <gbean@xxxxxxxxxxxxxx> wrote:
> Beginning with the MSM8x60, the hardware block responsible for gpio
> support changes. Provide gpiolib support for the new v2 architecture.
>
> Cc: Baruch Siach <baruch@xxxxxxxxxx>
> Cc: Pavan Kondeti <pkondeti@xxxxxxxxxxxxxx>
> Signed-off-by: Gregory Bean <gbean@xxxxxxxxxxxxxx>
> ---
> v4 - miscellaneous cleanup, per pkondeti@xxxxxxxxxxxxxx
> v3 - miscellaneous cleanup, per baruch@xxxxxxxxxx
> v2 - miscellaneous cleanup, per baruch@xxxxxxxxxx
>
> arch/arm/mach-msm/Makefile | 4 +-
> arch/arm/mach-msm/gpio-v2.c | 163 +++++++++++++++++++++++++++++++++++++++++++
[Ram] Can you let me know how this naming convention gpio-v2??
> 2 files changed, 166 insertions(+), 1 deletions(-)
> create mode 100644 arch/arm/mach-msm/gpio-v2.c
>
> diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
> index b5a7b07..4a1a7ea 100644
> --- a/arch/arm/mach-msm/Makefile
> +++ b/arch/arm/mach-msm/Makefile
> @@ -28,6 +28,8 @@ obj-$(CONFIG_ARCH_MSM8X60) += board-msm8x60.o
> obj-$(CONFIG_ARCH_MSM7X30) += gpiomux-7x30.o gpiomux-v1.o gpiomux.o
> obj-$(CONFIG_ARCH_QSD8X50) += gpiomux-8x50.o gpiomux-v1.o gpiomux.o
> obj-$(CONFIG_ARCH_MSM8X60) += gpiomux-8x60.o gpiomux-v2.o gpiomux.o
> -ifndef CONFIG_MSM_V2_TLMM
> +ifdef CONFIG_MSM_V2_TLMM
> +obj-y += gpio-v2.o
> +else
> obj-y += gpio.o
> endif
> diff --git a/arch/arm/mach-msm/gpio-v2.c b/arch/arm/mach-msm/gpio-v2.c
> new file mode 100644
> index 0000000..d907af6
> --- /dev/null
> +++ b/arch/arm/mach-msm/gpio-v2.c
> @@ -0,0 +1,163 @@
> +/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * 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., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA.
> + *
> + */
> +#include <linux/gpio.h>
> +#include <linux/io.h>
> +#include <linux/irq.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/spinlock.h>
> +#include <mach/msm_iomap.h>
> +#include "gpiomux.h"
> +
> +/* Bits of interest in the GPIO_IN_OUT register.
> + */
> +enum {
> + GPIO_IN_BIT = 0,
> + GPIO_OUT_BIT = 1
> +};
> +
> +/* Bits of interest in the GPIO_CFG register.
> + */
> +enum {
> + GPIO_OE_BIT = 9,
> +};
> +
> +#define GPIO_CONFIG(gpio) (MSM_TLMM_BASE + 0x1000 + (0x10 * (gpio)))
> +#define GPIO_IN_OUT(gpio) (MSM_TLMM_BASE + 0x1004 + (0x10 * (gpio)))
> +
> +static DEFINE_SPINLOCK(tlmm_lock);
> +
> +static int msm_gpio_get(struct gpio_chip *chip, unsigned offset)
> +{
> + return readl(GPIO_IN_OUT(offset)) & BIT(GPIO_IN_BIT);
> +}
> +
> +static void msm_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
> +{
> + writel(val ? BIT(GPIO_OUT_BIT) : 0, GPIO_IN_OUT(offset));
> +}
> +
> +static int msm_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
> +{
> + unsigned long irq_flags;
> +
> + spin_lock_irqsave(&tlmm_lock, irq_flags);
> + writel(readl(GPIO_CONFIG(offset)) & ~BIT(GPIO_OE_BIT),
> + GPIO_CONFIG(offset));
> + spin_unlock_irqrestore(&tlmm_lock, irq_flags);
> + return 0;
> +}
> +
> +static int msm_gpio_direction_output(struct gpio_chip *chip,
> + unsigned offset,
> + int val)
> +{
> + unsigned long irq_flags;
> +
> + spin_lock_irqsave(&tlmm_lock, irq_flags);
> + msm_gpio_set(chip, offset, val);
> + writel(readl(GPIO_CONFIG(offset)) | BIT(GPIO_OE_BIT),
> + GPIO_CONFIG(offset));
> + spin_unlock_irqrestore(&tlmm_lock, irq_flags);
> + return 0;
> +}
> +
> +static int msm_gpio_request(struct gpio_chip *chip, unsigned offset)
> +{
> + return msm_gpiomux_get(chip->base + offset);
> +}
> +
> +static void msm_gpio_free(struct gpio_chip *chip, unsigned offset)
> +{
> + msm_gpiomux_put(chip->base + offset);
> +}
> +
> +static struct gpio_chip msm_gpio = {
> + .base = 0,
> + .ngpio = NR_GPIO_IRQS,
> + .direction_input = msm_gpio_direction_input,
> + .direction_output = msm_gpio_direction_output,
> + .get = msm_gpio_get,
> + .set = msm_gpio_set,
> + .request = msm_gpio_request,
> + .free = msm_gpio_free,
> +};
> +
> +static int __devinit msm_gpio_probe(struct platform_device *dev)
> +{
> + int ret;
> +
> + msm_gpio.label = dev->name;
> + ret = gpiochip_add(&msm_gpio);
> +
> + return ret;
> +}
> +
> +static int __devexit msm_gpio_remove(struct platform_device *dev)
> +{
> + int ret = gpiochip_remove(&msm_gpio);
> +
> + if (ret < 0)
> + return ret;
> +
> + set_irq_handler(TLMM_SCSS_SUMMARY_IRQ, NULL);
> +
> + return 0;
> +}
> +
> +static struct platform_driver msm_gpio_driver = {
> + .probe = msm_gpio_probe,
> + .remove = __devexit_p(msm_gpio_remove),
> + .driver = {
> + .name = "msmgpio",
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +static struct platform_device msm_device_gpio = {
> + .name = "msmgpio",
> + .id = -1,
> +};
> +
> +static int __init msm_gpio_init(void)
> +{
> + int rc;
> +
> + rc = platform_driver_register(&msm_gpio_driver);
> + if (!rc) {
> + rc = platform_device_register(&msm_device_gpio);
> + if (rc)
> + platform_driver_unregister(&msm_gpio_driver);
> + }
> +
> + return rc;
> +}
> +
> +static void __exit msm_gpio_exit(void)
> +{
> + platform_device_unregister(&msm_device_gpio);
> + platform_driver_unregister(&msm_gpio_driver);
> +}
> +
> +postcore_initcall(msm_gpio_init);
> +module_exit(msm_gpio_exit);
> +
> +MODULE_AUTHOR("Gregory Bean <gbean@xxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Driver for Qualcomm MSM TLMMv2 SoC GPIOs");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:msmgpio");
> --
> 1.7.0.4
>
> --
> Employee of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
> --
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