On Mon, Jun 18, 2018 at 10:46:09PM -0700, Andrey Smirnov wrote: > This is a minimal port of a kernel commit 6552d3141064 ("backlight: > Add RAVE SP backlight driver"). All of the changes were kept to a > minimum and limited to impedance matching between Barebox/Linux driver > API. > > Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> > --- Applied, thanks Sascha > drivers/video/Kconfig | 7 +++ > drivers/video/Makefile | 2 + > drivers/video/rave-sp-backlight.c | 72 +++++++++++++++++++++++++++++++ > 3 files changed, 81 insertions(+) > create mode 100644 drivers/video/rave-sp-backlight.c > > diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig > index 1dcae48f8..79de32cf8 100644 > --- a/drivers/video/Kconfig > +++ b/drivers/video/Kconfig > @@ -124,6 +124,13 @@ config DRIVER_VIDEO_BACKLIGHT_PWM > help > Enable this to get support for backlight devices driven by a PWM. > > +config BACKLIGHT_RAVE_SP > + tristate "RAVE SP Backlight driver" > + depends on RAVE_SP_CORE > + depends on DRIVER_VIDEO_BACKLIGHT > + help > + Support for backlight control on RAVE SP device. > + > comment "Video encoder chips" > > config DRIVER_VIDEO_MTL017 > diff --git a/drivers/video/Makefile b/drivers/video/Makefile > index 081e4463d..01fabe880 100644 > --- a/drivers/video/Makefile > +++ b/drivers/video/Makefile > @@ -23,3 +23,5 @@ obj-$(CONFIG_DRIVER_VIDEO_SIMPLEFB) += simplefb.o > obj-$(CONFIG_DRIVER_VIDEO_IMX_IPUV3) += imx-ipu-v3/ > obj-$(CONFIG_DRIVER_VIDEO_EFI_GOP) += efi_gop.o > obj-$(CONFIG_DRIVER_VIDEO_FB_SSD1307) += ssd1307fb.o > +obj-$(CONFIG_BACKLIGHT_RAVE_SP) += rave-sp-backlight.o > + > diff --git a/drivers/video/rave-sp-backlight.c b/drivers/video/rave-sp-backlight.c > new file mode 100644 > index 000000000..88ec86e73 > --- /dev/null > +++ b/drivers/video/rave-sp-backlight.c > @@ -0,0 +1,72 @@ > +/* > + * LCD Backlight driver for RAVE SP > + * > + * Copyright (C) 2018 Zodiac Inflight Innovations > + * > + * 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, see <http://www.gnu.org/licenses/>. > + */ > + > +#include <common.h> > +#include <malloc.h> > +#include <init.h> > +#include <video/backlight.h> > +#include <linux/mfd/rave-sp.h> > + > +#define RAVE_SP_BACKLIGHT_LCD_EN BIT(7) > + > +static int rave_sp_backlight_set(struct backlight_device *bd, int brightness) > +{ > + struct rave_sp *sp = bd->dev.priv; > + u8 cmd[] = { > + [0] = RAVE_SP_CMD_SET_BACKLIGHT, > + [1] = 0, > + [2] = brightness ? RAVE_SP_BACKLIGHT_LCD_EN | brightness : 0, > + [3] = 0, > + [4] = 0, > + }; > + > + return rave_sp_exec(sp, cmd, sizeof(cmd), NULL, 0); > +} > + > +static int rave_sp_backlight_probe(struct device_d *dev) > +{ > + struct backlight_device *bd; > + int ret; > + > + bd = xzalloc(sizeof(*bd)); > + bd->dev.priv = dev->parent->priv; > + bd->brightness_default = 50; > + bd->brightness_max = 100; > + bd->brightness_set = rave_sp_backlight_set; > + > + ret = backlight_register(bd); > + if (ret) { > + free(bd); > + return ret; > + } > + > + return 0; > +} > + > +static const struct of_device_id rave_sp_backlight_of_match[] = { > + { .compatible = "zii,rave-sp-backlight" }, > + {} > +}; > + > +static struct driver_d rave_sp_backlight_driver = { > + .name = "rave-sp-backlight", > + .probe = rave_sp_backlight_probe, > + .of_compatible = DRV_OF_COMPAT(rave_sp_backlight_of_match), > +}; > +device_platform_driver(rave_sp_backlight_driver); > -- > 2.17.1 > > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox