diff options
Diffstat (limited to 'drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c')
| -rw-r--r-- | drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c new file mode 100644 index 000000000000..bbe880bbe795 --- /dev/null +++ b/drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c @@ -0,0 +1,153 @@ +/* + * LCD panel driver for Sharp LS037V7DW01 + * + * Copyright (C) 2008 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> + +#include <plat/display.h> + +struct sharp_data { + /* XXX This regulator should actually be in SDP board file, not here, + * as it doesn't actually power the LCD, but something else that + * affects the output to LCD (I think. Somebody clarify). It doesn't do + * harm here, as SDP is the only board using this currently */ + struct regulator *vdvi_reg; +}; + +static struct omap_video_timings sharp_ls_timings = { + .x_res = 480, + .y_res = 640, + + .pixel_clock = 19200, + + .hsw = 2, + .hfp = 1, + .hbp = 28, + + .vsw = 1, + .vfp = 1, + .vbp = 1, +}; + +static int sharp_ls_panel_probe(struct omap_dss_device *dssdev) +{ + struct sharp_data *sd; + + dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS | + OMAP_DSS_LCD_IHS; + dssdev->panel.acb = 0x28; + dssdev->panel.timings = sharp_ls_timings; + + sd = kzalloc(sizeof(*sd), GFP_KERNEL); + if (!sd) + return -ENOMEM; + + dev_set_drvdata(&dssdev->dev, sd); + + sd->vdvi_reg = regulator_get(&dssdev->dev, "vdvi"); + if (IS_ERR(sd->vdvi_reg)) { + kfree(sd); + pr_err("failed to get VDVI regulator\n"); + return PTR_ERR(sd->vdvi_reg); + } + + return 0; +} + +static void sharp_ls_panel_remove(struct omap_dss_device *dssdev) +{ + struct sharp_data *sd = dev_get_drvdata(&dssdev->dev); + + regulator_put(sd->vdvi_reg); + + kfree(sd); +} + +static int sharp_ls_panel_enable(struct omap_dss_device *dssdev) +{ + struct sharp_data *sd = dev_get_drvdata(&dssdev->dev); + int r = 0; + + /* wait couple of vsyncs until enabling the LCD */ + msleep(50); + + regulator_enable(sd->vdvi_reg); + + if (dssdev->platform_enable) + r = dssdev->platform_enable(dssdev); + + return r; +} + +static void sharp_ls_panel_disable(struct omap_dss_device *dssdev) +{ + struct sharp_data *sd = dev_get_drvdata(&dssdev->dev); + + if (dssdev->platform_disable) + dssdev->platform_disable(dssdev); + + regulator_disable(sd->vdvi_reg); + + /* wait at least 5 vsyncs after disabling the LCD */ + + msleep(100); +} + +static int sharp_ls_panel_suspend(struct omap_dss_device *dssdev) +{ + sharp_ls_panel_disable(dssdev); + return 0; +} + +static int sharp_ls_panel_resume(struct omap_dss_device *dssdev) +{ + return sharp_ls_panel_enable(dssdev); +} + +static struct omap_dss_driver sharp_ls_driver = { + .probe = sharp_ls_panel_probe, + .remove = sharp_ls_panel_remove, + + .enable = sharp_ls_panel_enable, + .disable = sharp_ls_panel_disable, + .suspend = sharp_ls_panel_suspend, + .resume = sharp_ls_panel_resume, + + .driver = { + .name = "sharp_ls_panel", + .owner = THIS_MODULE, + }, +}; + +static int __init sharp_ls_panel_drv_init(void) +{ + return omap_dss_register_driver(&sharp_ls_driver); +} + +static void __exit sharp_ls_panel_drv_exit(void) +{ + omap_dss_unregister_driver(&sharp_ls_driver); +} + +module_init(sharp_ls_panel_drv_init); +module_exit(sharp_ls_panel_drv_exit); +MODULE_LICENSE("GPL"); |