Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966424AbdCXTQX (ORCPT ); Fri, 24 Mar 2017 15:16:23 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:49954 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751306AbdCXTQQ (ORCPT ); Fri, 24 Mar 2017 15:16:16 -0400 From: Mark Brown To: Daniel Baluta Cc: Charles Keepax , Mark Brown , lgirdwood@gmail.com, broonie@kernel.org, tiwai@suse.com, shengjiu.wang@freescale.com, patches@opensource.wolfsonmicro.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, viorel.suman@nxp.com, mihai.serban@nxp.com, ckeepax@opensource.wolfsonmicro.com, alsa-devel@alsa-project.org In-Reply-To: <1490090976-25877-2-git-send-email-daniel.baluta@nxp.com> Message-Id: Date: Fri, 24 Mar 2017 19:16:05 +0000 X-SA-Exim-Connect-IP: 2001:470:1f1d:6b5::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Applied "ASoC: codec: wm8960: Refactor sysclk freq search" to the asoc tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: No (on mezzanine.sirena.org.uk); Unknown failure Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4662 Lines: 149 The patch ASoC: codec: wm8960: Refactor sysclk freq search has been applied to the asoc tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 3ddc97211cbb61a5f59882c26f8e3158c86e34bb Mon Sep 17 00:00:00 2001 From: Daniel Baluta Date: Tue, 21 Mar 2017 17:03:24 +0200 Subject: [PATCH] ASoC: codec: wm8960: Refactor sysclk freq search Add a separate function for finding (sysclk, lrclk, bclk) when the clock is auto or mclk. This makes code easier to read and reduces the indentation level in wm8960_configure_clocking. Signed-off-by: Daniel Baluta Acked-by: Charles Keepax Signed-off-by: Mark Brown --- sound/soc/codecs/wm8960.c | 80 ++++++++++++++++++++++++++++++++++++----------- 1 file changed, 61 insertions(+), 19 deletions(-) diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 3bf081a7e450..25a4a11929fe 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -604,12 +604,71 @@ static const int bclk_divs[] = { 120, 160, 220, 240, 320, 320, 320 }; +/** + * wm8960_configure_sysclk - checks if there is a sysclk frequency available + * The sysclk must be chosen such that: + * - sysclk = MCLK / sysclk_divs + * - lrclk = sysclk / dac_divs + * - 10 * bclk = sysclk / bclk_divs + * + * @wm8960_priv: wm8960 codec private data + * @mclk: MCLK used to derive sysclk + * @sysclk_idx: sysclk_divs index for found sysclk + * @dac_idx: dac_divs index for found lrclk + * @bclk_idx: bclk_divs index for found bclk + * + * Returns: + * -1, in case no sysclk frequency available found + * 0, in case an exact (@sysclk_idx, @dac_idx, @bclk_idx) match is found + */ +static +int wm8960_configure_sysclk(struct wm8960_priv *wm8960, int mclk, + int *sysclk_idx, int *dac_idx, int *bclk_idx) +{ + int sysclk, bclk, lrclk; + int i, j, k; + int diff; + + bclk = wm8960->bclk; + lrclk = wm8960->lrclk; + + /* check if the sysclk frequency is available. */ + for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) { + if (sysclk_divs[i] == -1) + continue; + sysclk = mclk / sysclk_divs[i]; + for (j = 0; j < ARRAY_SIZE(dac_divs); ++j) { + if (sysclk != dac_divs[j] * lrclk) + continue; + for (k = 0; k < ARRAY_SIZE(bclk_divs); ++k) { + diff = sysclk - bclk * bclk_divs[k] / 10; + if (diff == 0) { + *sysclk_idx = i; + *dac_idx = j; + *bclk_idx = k; + break; + } + } + if (k != ARRAY_SIZE(bclk_divs)) + break; + } + if (j != ARRAY_SIZE(dac_divs)) + break; + } + + if (i != ARRAY_SIZE(sysclk_divs)) + return 0; + + return -1; +} + static int wm8960_configure_clocking(struct snd_soc_codec *codec) { struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); int sysclk, bclk, lrclk, freq_out, freq_in; u16 iface1 = snd_soc_read(codec, WM8960_IFACE1); int i, j, k; + int ret; if (!(iface1 & (1<<6))) { dev_dbg(codec->dev, @@ -643,25 +702,8 @@ static int wm8960_configure_clocking(struct snd_soc_codec *codec) } if (wm8960->clk_id != WM8960_SYSCLK_PLL) { - /* check if the sysclk frequency is available. */ - for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) { - if (sysclk_divs[i] == -1) - continue; - sysclk = freq_out / sysclk_divs[i]; - for (j = 0; j < ARRAY_SIZE(dac_divs); ++j) { - if (sysclk != dac_divs[j] * lrclk) - continue; - for (k = 0; k < ARRAY_SIZE(bclk_divs); ++k) - if (sysclk == bclk * bclk_divs[k] / 10) - break; - if (k != ARRAY_SIZE(bclk_divs)) - break; - } - if (j != ARRAY_SIZE(dac_divs)) - break; - } - - if (i != ARRAY_SIZE(sysclk_divs)) { + ret = wm8960_configure_sysclk(wm8960, freq_out, &i, &j, &k); + if (ret == 0) { goto configure_clock; } else if (wm8960->clk_id != WM8960_SYSCLK_AUTO) { dev_err(codec->dev, "failed to configure clock\n"); -- 2.11.0