/* * ALSA SoC TPA6130A2 amplifier driver * * Copyright (C) Nokia Corporation * * Author: Peter Ujfalusi * * 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, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * */ #ifndef __TPA6130A2_H__ #define __TPA6130A2_H__ /* Register addresses */ #define TPA6130A2_REG_CONTROL 0x01 #define TPA6130A2_REG_VOL_MUTE 0x02 #define TPA6130A2_REG_OUT_IMPEDANCE 0x03 #define TPA6130A2_REG_VERSION 0x04 /* Register bits */ /* TPA6130A2_REG_CONTROL (0x01) */ #define TPA6130A2_SWS_SHIFT 0 #define TPA6130A2_SWS (0x01 << TPA6130A2_SWS_SHIFT) #define TPA6130A2_TERMAL (0x01 << 1) #define TPA6130A2_MODE(x) (x << 4) #define TPA6130A2_MODE_STEREO (0x00) #define TPA6130A2_MODE_DUAL_MONO (0x01) #define TPA6130A2_MODE_BRIDGE (0x02) #define TPA6130A2_MODE_MASK (0x03) #define TPA6130A2_HP_EN_R_SHIFT 6 #define TPA6130A2_HP_EN_R (0x01 << TPA6130A2_HP_EN_R_SHIFT) #define TPA6130A2_HP_EN_L_SHIFT 7 #define TPA6130A2_HP_EN_L (0x01 << TPA6130A2_HP_EN_L_SHIFT) /* TPA6130A2_REG_VOL_MUTE (0x02) */ #define TPA6130A2_VOLUME(x) ((x & 0x3f) << 0) #define TPA6130A2_MUTE_R (0x01 << 6) #define TPA6130A2_MUTE_L (0x01 << 7) /* TPA6130A2_REG_OUT_IMPEDANCE (0x03) */ #define TPA6130A2_HIZ_R (0x01 << 0) #define TPA6130A2_HIZ_L (0x01 << 1) /* TPA6130A2_REG_VERSION (0x04) */ #define TPA6130A2_VERSION_MASK (0x0f) #endif /* __TPA6130A2_H__ */ fc718d13a50fbc746ed9b415c25e92'>commitdiff
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /net/sunrpc/stats.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/sunrpc/stats.c')