/* * Sanyo LV5207LP LED Driver * * Copyright (C) 2013 Ideas on board SPRL * * Contact: Laurent Pinchart * * 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. */ #include #include #include #include #include #include #include #define LV5207LP_CTRL1 0x00 #define LV5207LP_CPSW (1 << 7) #define LV5207LP_SCTEN (1 << 6) #define LV5207LP_C10 (1 << 5) #define LV5207LP_CKSW (1 << 4) #define LV5207LP_RSW (1 << 3) #define LV5207LP_GSW (1 << 2) #define LV5207LP_BSW (1 << 1) #define LV5207LP_CTRL2 0x01 #define LV5207LP_MSW (1 << 7) #define LV5207LP_MLED4 (1 << 6) #define LV5207LP_RED 0x02 #define LV5207LP_GREEN 0x03 #define LV5207LP_BLUE 0x04 #define LV5207LP_MAX_BRIGHTNESS 32 struct lv5207lp { struct i2c_client *client; struct backlight_device *backlight; struct lv5207lp_platform_data *pdata; }; static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data) { return i2c_smbus_write_byte_data(lv->client, reg, data); } static int lv5207lp_backlight_update_status(struct backlight_device *backlight) { struct lv5207lp *lv = bl_get_data(backlight); int brightness = backlight->props.brightness; if (backlight->props.power != FB_BLANK_UNBLANK || backlight->props.fb_blank != FB_BLANK_UNBLANK || backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK)) brightness = 0; if (brightness) { lv5207lp_write(lv, LV5207LP_CTRL1, LV5207LP_CPSW | LV5207LP_C10 | LV5207LP_CKSW); lv5207lp_write(lv, LV5207LP_CTRL2, LV5207LP_MSW | LV5207LP_MLED4 | (brightness - 1)); } else { lv5207lp_write(lv, LV5207LP_CTRL1, 0); lv5207lp_write(lv, LV5207LP_CTRL2, 0); } return 0; } static int lv5207lp_backlight_check_fb(struct backlight_device *backlight, struct fb_info *info) { struct lv5207lp *lv = bl_get_data(backlight); return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev; } static const struct backlight_ops lv5207lp_backlight_ops = { .options = BL_CORE_SUSPENDRESUME, .update_status = lv5207lp_backlight_update_status, .check_fb = lv5207lp_backlight_check_fb, }; static int lv5207lp_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct lv5207lp_platform_data *pdata = dev_get_platdata(&client->dev); struct backlight_device *backlight; struct backlight_properties props; struct lv5207lp *lv; if (pdata == NULL) { dev_err(&client->dev, "No platform data supplied\n"); return -EINVAL; } if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { dev_warn(&client->dev, "I2C adapter doesn't support I2C_FUNC_SMBUS_BYTE\n"); return -EIO; } lv = devm_kzalloc(&client->dev, sizeof(*lv), GFP_KERNEL); if (!lv) return -ENOMEM; lv->client = client; lv->pdata = pdata; memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.max_brightness = min_t(unsigned int, pdata->max_value, LV5207LP_MAX_BRIGHTNESS); props.brightness = clamp_t(unsigned int, pdata->def_value, 0, props.max_brightness); backlight = devm_backlight_device_register(&client->dev, dev_name(&client->dev), &lv->client->dev, lv, &lv5207lp_backlight_ops, &props); if (IS_ERR(backlight)) { dev_err(&client->dev, "failed to register backlight\n"); return PTR_ERR(backlight); } backlight_update_status(backlight); i2c_set_clientdata(client, backlight); return 0; } static int lv5207lp_remove(struct i2c_client *client) { struct backlight_device *backlight = i2c_get_clientdata(client); backlight->props.brightness = 0; backlight_update_status(backlight); return 0; } static const struct i2c_device_id lv5207lp_ids[] = { { "lv5207lp", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, lv5207lp_ids); static struct i2c_driver lv5207lp_driver = { .driver = { .name = "lv5207lp", }, .probe = lv5207lp_probe, .remove = lv5207lp_remove, .id_table = lv5207lp_ids, }; module_i2c_driver(lv5207lp_driver); MODULE_DESCRIPTION("Sanyo LV5207LP Backlight Driver"); MODULE_AUTHOR("Laurent Pinchart "); MODULE_LICENSE("GPL"); t();'>mode:
authorTony Lindgren <tony@atomide.com>2017-01-24 09:18:57 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-25 11:02:29 +0100
commit407788b51db6f6aab499d02420082f436abf3238 (patch)
treeb2fb3c885baf47cd2bd8ee0429f423b352e11905 /net/sched/em_meta.c
parent7a308bb3016f57e5be11a677d15b821536419d36 (diff)
usb: musb: Fix host mode error -71 regression
Commit 467d5c980709 ("usb: musb: Implement session bit based runtime PM for musb-core") started implementing musb generic runtime PM support by introducing devctl register session bit based state control. This caused a regression where if a USB mass storage device is connected to a USB hub, we can get: usb 1-1: reset high-speed USB device number 2 using musb-hdrc usb 1-1: device descriptor read/64, error -71 usb 1-1.1: new high-speed USB device number 4 using musb-hdrc This is because before the USB storage device is connected, musb is in OTG_STATE_A_SUSPEND. And we currently only set need_finish_resume in musb_stage0_irq() and the related code calling finish_resume_work in musb_resume() and musb_runtime_resume() never gets called. To fix the issue, we can call schedule_delayed_work() directly in musb_stage0_irq() to have finish_resume_work run. And we should no longer never get interrupts when when suspended. We have changed musb to no longer need pm_runtime_irqsafe(). The need_finish_resume flag was added in commit 9298b4aad37e ("usb: musb: fix device hotplug behind hub") and no longer applies as far as I can tell. So let's just remove the earlier code that no longer is needed. Fixes: 467d5c980709 ("usb: musb: Implement session bit based runtime PM for musb-core") Reported-by: Bin Liu <b-liu@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Bin Liu <b-liu@ti.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sched/em_meta.c')