[PATCH] Add RTDM gpio driver for the OMAP family of SOCs

Jan Kiszka jan.kiszka at siemens.com
Mon Mar 2 14:05:22 CET 2020


On 26.02.20 07:00, Greg Gallagher via Xenomai wrote:
> Add new gpio RTDM driver for OMAP family of SOCs, tested on beaglebone black
> and beaglebone green (AM335x)
> 
> Signed-off-by: Greg Gallagher <greg at embeddedgreg.com>
> ---
>   kernel/drivers/gpio/Kconfig     |  8 ++++++
>   kernel/drivers/gpio/Makefile    |  2 ++
>   kernel/drivers/gpio/gpio-omap.c | 43 +++++++++++++++++++++++++++++++++
>   3 files changed, 53 insertions(+)
>   create mode 100644 kernel/drivers/gpio/gpio-omap.c
> 
> diff --git a/kernel/drivers/gpio/Kconfig b/kernel/drivers/gpio/Kconfig
> index 48475f291..dbc862754 100644
> --- a/kernel/drivers/gpio/Kconfig
> +++ b/kernel/drivers/gpio/Kconfig
> @@ -49,6 +49,14 @@ config XENO_DRIVERS_GPIO_XILINX
>   	Enables support for the GPIO controller available from
>   	Xilinx's softcore IP.
>   
> +config XENO_DRIVERS_GPIO_OMAP
> +	depends on ARCH_OMAP2PLUS || ARCH_OMAP
> +	tristate "Support for OMAP GPIOs"
> +	help
> +
> +	Enables support for the GPIO controller available from
> +	OMAP family SOC.
> +
>   config XENO_DRIVERS_GPIO_DEBUG
>          bool "Enable GPIO core debugging features"
>   
> diff --git a/kernel/drivers/gpio/Makefile b/kernel/drivers/gpio/Makefile
> index 8648fcca9..7bcf59949 100644
> --- a/kernel/drivers/gpio/Makefile
> +++ b/kernel/drivers/gpio/Makefile
> @@ -5,6 +5,7 @@ obj-$(CONFIG_XENO_DRIVERS_GPIO_MXC) += xeno-gpio-mxc.o
>   obj-$(CONFIG_XENO_DRIVERS_GPIO_SUN8I_H3) += xeno-gpio-sun8i-h3.o
>   obj-$(CONFIG_XENO_DRIVERS_GPIO_ZYNQ7000) += xeno-gpio-zynq7000.o
>   obj-$(CONFIG_XENO_DRIVERS_GPIO_XILINX) += xeno-gpio-xilinx.o
> +obj-$(CONFIG_XENO_DRIVERS_GPIO_OMAP) += xeno-gpio-omap.o
>   obj-$(CONFIG_XENO_DRIVERS_GPIO) += gpio-core.o
>   
>   xeno-gpio-bcm2835-y := gpio-bcm2835.o
> @@ -12,3 +13,4 @@ xeno-gpio-mxc-y := gpio-mxc.o
>   xeno-gpio-sun8i-h3-y := gpio-sun8i-h3.o
>   xeno-gpio-zynq7000-y := gpio-zynq7000.o
>   xeno-gpio-xilinx-y := gpio-xilinx.o
> +xeno-gpio-omap-y := gpio-omap.o
> diff --git a/kernel/drivers/gpio/gpio-omap.c b/kernel/drivers/gpio/gpio-omap.c
> new file mode 100644
> index 000000000..5f10278f3
> --- /dev/null
> +++ b/kernel/drivers/gpio/gpio-omap.c
> @@ -0,0 +1,43 @@
> +/**
> + * @note Copyright (C) 2020 Greg Gallagher <greg at embeddedgreg.com>
> + *
> + * 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 <linux/module.h>
> +#include <rtdm/gpio.h>
> +
> +#define RTDM_SUBCLASS_OMAP  6
> +
> +static const char *compat_array[] = {
> +	"ti,omap4-gpio",
> +	"ti,omap3-gpio",
> +	"ti,omap2-gpio",
> +};
> +
> +static int __init omap_gpio_init(void)
> +{
> +	return rtdm_gpiochip_scan_array_of(NULL, compat_array,
> +					   ARRAY_SIZE(compat_array),
> +					   RTDM_SUBCLASS_OMAP);
> +}
> +module_init(omap_gpio_init);
> +
> +static void __exit omap_gpio_exit(void)
> +{
> +	rtdm_gpiochip_remove_of(RTDM_SUBCLASS_OMAP);
> +}
> +module_exit(omap_gpio_exit);
> +
> +MODULE_LICENSE("GPL");
> 

Thanks, applied to next. Also enabled in CI.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux



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