From patchwork Mon Nov 15 20:34:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marijn Suijten X-Patchwork-Id: 12620393 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6BD0FC433F5 for ; Mon, 15 Nov 2021 20:35:20 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 418BC60FBF for ; Mon, 15 Nov 2021 20:35:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 418BC60FBF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=somainline.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E19176E4CF; Mon, 15 Nov 2021 20:35:15 +0000 (UTC) Received: from relay03.th.seeweb.it (relay03.th.seeweb.it [5.144.164.164]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5FEA889FC8 for ; Mon, 15 Nov 2021 20:35:10 +0000 (UTC) Received: from Marijn-Arch-PC.localdomain (94-209-165-62.cable.dynamic.v4.ziggo.nl [94.209.165.62]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r1.th.seeweb.it (Postfix) with ESMTPSA id D528E1F9D4; Mon, 15 Nov 2021 21:35:07 +0100 (CET) From: Marijn Suijten To: phone-devel@vger.kernel.org, Andy Gross , Bjorn Andersson , Rob Herring , Lee Jones , Daniel Thompson , Jingoo Han Subject: [PATCH v3 3/9] backlight: qcom-wled: Use cpu_to_le16 macro to perform conversion Date: Mon, 15 Nov 2021 21:34:53 +0100 Message-Id: <20211115203459.1634079-4-marijn.suijten@somainline.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115203459.1634079-1-marijn.suijten@somainline.org> References: <20211115203459.1634079-1-marijn.suijten@somainline.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-fbdev@vger.kernel.org, Kiran Gunda , Pavel Dubrova , Jami Kettunen , linux-arm-msm@vger.kernel.org, Bryan Wu , Konrad Dybcio , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Martin Botka , ~postmarketos/upstreaming@lists.sr.ht, AngeloGioacchino Del Regno , Marijn Suijten Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The kernel already provides appropriate primitives to perform endianness conversion which should be used in favour of manual bit-wrangling. Signed-off-by: Marijn Suijten Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Daniel Thompson --- drivers/video/backlight/qcom-wled.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index d413b913fef3..9d883e702134 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -231,14 +231,14 @@ struct wled { static int wled3_set_brightness(struct wled *wled, u16 brightness) { int rc, i; - u8 v[2]; + __le16 v; - v[0] = brightness & 0xff; - v[1] = (brightness >> 8) & 0xf; + v = cpu_to_le16(brightness & WLED3_SINK_REG_BRIGHT_MAX); for (i = 0; i < wled->cfg.num_strings; ++i) { rc = regmap_bulk_write(wled->regmap, wled->ctrl_addr + - WLED3_SINK_REG_BRIGHT(i), v, 2); + WLED3_SINK_REG_BRIGHT(i), + &v, sizeof(v)); if (rc < 0) return rc; } @@ -250,18 +250,18 @@ static int wled4_set_brightness(struct wled *wled, u16 brightness) { int rc, i; u16 low_limit = wled->max_brightness * 4 / 1000; - u8 v[2]; + __le16 v; /* WLED4's lower limit of operation is 0.4% */ if (brightness > 0 && brightness < low_limit) brightness = low_limit; - v[0] = brightness & 0xff; - v[1] = (brightness >> 8) & 0xf; + v = cpu_to_le16(brightness & WLED3_SINK_REG_BRIGHT_MAX); for (i = 0; i < wled->cfg.num_strings; ++i) { rc = regmap_bulk_write(wled->regmap, wled->sink_addr + - WLED4_SINK_REG_BRIGHT(i), v, 2); + WLED4_SINK_REG_BRIGHT(i), + &v, sizeof(v)); if (rc < 0) return rc; } @@ -273,21 +273,20 @@ static int wled5_set_brightness(struct wled *wled, u16 brightness) { int rc, offset; u16 low_limit = wled->max_brightness * 1 / 1000; - u8 v[2]; + __le16 v; /* WLED5's lower limit is 0.1% */ if (brightness < low_limit) brightness = low_limit; - v[0] = brightness & 0xff; - v[1] = (brightness >> 8) & 0x7f; + v = cpu_to_le16(brightness & WLED5_SINK_REG_BRIGHT_MAX_15B); offset = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB : WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB; rc = regmap_bulk_write(wled->regmap, wled->sink_addr + offset, - v, 2); + &v, sizeof(v)); return rc; }