/* * Shared helper functions for devices from the ADAU family * * Copyright 2011-2016 Analog Devices Inc. * Author: Lars-Peter Clausen * * Licensed under the GPL-2 or later. */ #include #include #include #include "adau-utils.h" int adau_calc_pll_cfg(unsigned int freq_in, unsigned int freq_out, uint8_t regs[5]) { unsigned int r, n, m, i, j; unsigned int div; if (!freq_out) { r = 0; n = 0; m = 0; div = 0; } else { if (freq_out % freq_in != 0) { div = DIV_ROUND_UP(freq_in, 13500000); freq_in /= div; r = freq_out / freq_in; i = freq_out % freq_in; j = gcd(i, freq_in); n = i / j; m = freq_in / j; div--; } else { r = freq_out / freq_in; n = 0; m = 0; div = 0; } if (n > 0xffff || m > 0xffff || div > 3 || r > 8 || r < 2) return -EINVAL; } regs[0] = m >> 8; regs[1] = m & 0xff; regs[2] = n >> 8; regs[3] = n & 0xff; regs[4] = (r << 3) | (div << 1); if (m != 0) regs[4] |= 1; /* Fractional mode */ return 0; } EXPORT_SYMBOL_GPL(adau_calc_pll_cfg); MODULE_DESCRIPTION("ASoC ADAU audio CODECs shared helper functions"); MODULE_AUTHOR("Lars-Peter Clausen "); MODULE_LICENSE("GPL v2"); p-back'>packet-loop-back net-next plumbingsTobias Klauser
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /sound/pci/hda/patch_sigmatel.c
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'sound/pci/hda/patch_sigmatel.c')