/* * Renesas USB driver R-Car Gen. 3 initialization and power control * * Copyright (C) 2016 Renesas Electronics Corporation * * 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 "common.h" #include "rcar3.h" #define LPSTS 0x102 #define UGCTRL2 0x184 /* 32-bit register */ /* Low Power Status register (LPSTS) */ #define LPSTS_SUSPM 0x4000 /* USB General control register 2 (UGCTRL2), bit[31:6] should be 0 */ #define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */ #define UGCTRL2_USB0SEL_OTG 0x00000030 static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data) { iowrite32(data, priv->base + reg); } static int usbhs_rcar3_power_ctrl(struct platform_device *pdev, void __iomem *base, int enable) { struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | UGCTRL2_USB0SEL_OTG); if (enable) { usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM); /* The controller on R-Car Gen3 needs to wait up to 45 usec */ udelay(45); } else { usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0); } return 0; } static int usbhs_rcar3_get_id(struct platform_device *pdev) { return USBHS_GADGET; } const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = { .power_ctrl = usbhs_rcar3_power_ctrl, .get_id = usbhs_rcar3_get_id, }; summaryrefslogtreecommitdiff
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /fs/afs/security.c
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs/afs/security.c')