From patchwork Fri Dec 20 11:33:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 13916642 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CE4A3E7718C for ; Fri, 20 Dec 2024 11:33:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vwYuorfmgiIIGHRYCi0+SEqtiZ94QtRlY6On2mSAlnI=; b=0mZMoVHIGtmrpg kxWUectxUOLq5rLYSZ4SS5QC54nbWStTGdxNtdwYikCSOrt154XIFYKMbSz1aZIiqxWJV2RHcux/i VwhgcgIH3fB2NlFHNJHW9wKb4UGV15hQwaOSo/SlYZWUgHpF0V3Q3jusVgb6qhSMdATMqq1HnlkRa oNGWczF+zo1UrTfpD8KGvsJxpAS5avW3Hv19/o8c9FVLoWm0JxQWMoIF2B6u65upyTynL998lSlJS 2GhS1SbDxTr8Dj/SIYA2qZJLZqp3LV6RLXpxc5XpYVotTDuX+xOdi7/xR45y9Y2gPd1R7PmRgGxjS llP1K14eGzTN6vk1BxbQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tObGH-00000004mxM-2U3y; Fri, 20 Dec 2024 11:33:41 +0000 Received: from zeus03.de ([194.117.254.33] helo=mail.zeus03.de) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tObGF-00000004muv-0pj7 for linux-i3c@lists.infradead.org; Fri, 20 Dec 2024 11:33:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; s=k1; bh=JTVYffu7bObqCnm7BryRbyhmBYXN9UAwW1f5OWePOno=; b=HOfd6r thrpQ4Z1iKg1lV10bbLXXLAv0bJjlmc2QLWt7mjWQHkd5X02kvj4KDMwL4SeUmKC VfzrSienSOqIBUQ9NGXvBNHIUDsTqbjoSzyLAMKNKY/t0S4i24n7GSg84jVU3LMd KqrZyxW/tZWCyp201EyiqOFjRpmmzx2Ux0Pk+Jjwk/fVfZAApYbpG3l7JZsfgJbZ i4vJ8ZuiV5JA1q9dlecFGLuYID6vaxI1mtCyUUun9NipB2tLFRwyBLh2TptG3EEc ijBtNqexA++R0K4Gn8XRuW6s9eymaTuU7CkIeEJg4UuWErHhvW+wQXbatkz5x1Is K2jLozDFsnoqHl3w== Received: (qmail 990974 invoked from network); 20 Dec 2024 12:33:37 +0100 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 20 Dec 2024 12:33:37 +0100 X-UD-Smtp-Session: l3s3148p1@KYCKBLIpzuIujnsY From: Wolfram Sang To: linux-renesas-soc@vger.kernel.org Cc: Yury Norov , linux-i3c@lists.infradead.org, Wolfram Sang , Alexandre Belloni Subject: [PATCH RFT RESEND 3/5] i3c: dw: use get_parity8 helper instead of open coding it Date: Fri, 20 Dec 2024 12:33:31 +0100 Message-Id: <20241220113335.17937-4-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20241220113335.17937-1-wsa+renesas@sang-engineering.com> References: <20241220113335.17937-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241220_033339_505572_6F0702A7 X-CRM114-Status: UNSURE ( 8.56 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org The kernel has now a generic helper for getting parity with easier to understand semantics. Make use of it. Signed-off-by: Wolfram Sang --- drivers/i3c/master/dw-i3c-master.c | 14 +++----------- 1 file changed, 3 insertions(+), 11 deletions(-) diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c index d4b80eb8cecd..a6d7fade5007 100644 --- a/drivers/i3c/master/dw-i3c-master.c +++ b/drivers/i3c/master/dw-i3c-master.c @@ -251,14 +251,6 @@ struct dw_i3c_i2c_dev_data { struct i3c_generic_ibi_pool *ibi_pool; }; -static u8 even_parity(u8 p) -{ - p ^= p >> 4; - p &= 0xf; - - return (0x9669 >> p) & 1; -} - static bool dw_i3c_master_supports_ccc_cmd(struct i3c_master_controller *m, const struct i3c_ccc_cmd *cmd) { @@ -848,7 +840,7 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m) struct dw_i3c_xfer *xfer; struct dw_i3c_cmd *cmd; u32 olddevs, newdevs; - u8 p, last_addr = 0; + u8 last_addr = 0; int ret, pos; ret = pm_runtime_resume_and_get(master->dev); @@ -873,9 +865,9 @@ static int dw_i3c_master_daa(struct i3c_master_controller *m) } master->devs[pos].addr = ret; - p = even_parity(ret); last_addr = ret; - ret |= (p << 7); + + ret |= get_parity8(ret) ? 0 : BIT(7); writel(DEV_ADDR_TABLE_DYNAMIC_ADDR(ret), master->regs +