From patchwork Mon Oct 4 19:27:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marijn Suijten X-Patchwork-Id: 12534667 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 4A584C4332F for ; Mon, 4 Oct 2021 19:34:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35FEA61181 for ; Mon, 4 Oct 2021 19:34:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238974AbhJDTgD (ORCPT ); Mon, 4 Oct 2021 15:36:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38056 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238929AbhJDTfv (ORCPT ); Mon, 4 Oct 2021 15:35:51 -0400 Received: from relay02.th.seeweb.it (relay02.th.seeweb.it [IPv6:2001:4b7a:2000:18::163]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ABDC9C06174E for ; Mon, 4 Oct 2021 12:34:01 -0700 (PDT) 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 D1AE81F68F; Mon, 4 Oct 2021 21:27:44 +0200 (CEST) From: Marijn Suijten To: phone-devel@vger.kernel.org, Andy Gross , Bjorn Andersson , Lee Jones , Daniel Thompson , Jingoo Han Cc: ~postmarketos/upstreaming@lists.sr.ht, AngeloGioacchino Del Regno , Konrad Dybcio , Martin Botka , Jami Kettunen , Pavel Dubrova , Marijn Suijten , Kiran Gunda , Courtney Cavin , Bryan Wu , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 02/10] backlight: qcom-wled: Use cpu_to_le16 macro to perform conversion Date: Mon, 4 Oct 2021 21:27:33 +0200 Message-Id: <20211004192741.621870-3-marijn.suijten@somainline.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211004192741.621870-1-marijn.suijten@somainline.org> References: <20211004192741.621870-1-marijn.suijten@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org 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 | 25 +++++++++++-------------- 1 file changed, 11 insertions(+), 14 deletions(-) diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 6af808af2328..9927ed98944a 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]; + u16 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; } @@ -249,19 +249,18 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness) static int wled4_set_brightness(struct wled *wled, u16 brightness) { int rc, i; - u16 low_limit = wled->max_brightness * 4 / 1000; - u8 v[2]; + u16 v, low_limit = wled->max_brightness * 4 / 1000; /* 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; } @@ -272,22 +271,20 @@ static int wled4_set_brightness(struct wled *wled, u16 brightness) static int wled5_set_brightness(struct wled *wled, u16 brightness) { int rc, offset; - u16 low_limit = wled->max_brightness * 1 / 1000; - u8 v[2]; + u16 v, low_limit = wled->max_brightness * 1 / 1000; /* 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; }