From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CF60BC2BB3F for ; Wed, 15 Nov 2023 19:40:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234816AbjKOTkd (ORCPT ); Wed, 15 Nov 2023 14:40:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234486AbjKOTkc (ORCPT ); Wed, 15 Nov 2023 14:40:32 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC5B010E0 for ; Wed, 15 Nov 2023 11:40:27 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 604AAC433C8; Wed, 15 Nov 2023 19:40:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700077227; bh=V8kvtHk6dbLxEEs/KUw1SBxJ70a7au/VAD5ZK4Ji9r4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Um+OXd8NFe+rikhqGVb6ajIqpxhSRzc8optNzx2N+Rkk4U5BrqZJFKlZyli0bXieF fwJCW2eYYi5Lni8pP/Svfs39FvJ7vi6N51curw/bqO4hOZWFqkW6duvg50pnhZjelw qlrOhy8wh0+cara39hWm6bKneqpIYbrXokjDaXjU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Claudiu Beznea , Geert Uytterhoeven , Sasha Levin Subject: [PATCH 6.6 175/603] clk: renesas: rzg2l: Wait for status bit of SD mux before continuing Date: Wed, 15 Nov 2023 14:12:00 -0500 Message-ID: <20231115191625.338275648@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191613.097702445@linuxfoundation.org> References: <20231115191613.097702445@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Claudiu Beznea [ Upstream commit 549f4ae2601f968e2474c6031fb4799468882f64 ] The hardware user manual for RZ/G2L (r01uh0914ej0130-rzg2l-rzg2lc.pdf, chapter 7.4.7 Procedure for Switching Clocks by the Dynamic Switching Frequency Selectors) specifies that we need to check CPG_PL2SDHI_DSEL for SD clock switching status. Fixes: eaff33646f4cb ("clk: renesas: rzg2l: Add SDHI clk mux support") Signed-off-by: Claudiu Beznea Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20230929053915.1530607-3-claudiu.beznea@bp.renesas.com Signed-off-by: Geert Uytterhoeven Signed-off-by: Sasha Levin --- drivers/clk/renesas/rzg2l-cpg.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index 47f488387f33a..9d25f7d0494e6 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -188,7 +188,8 @@ static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index) u32 off = GET_REG_OFFSET(hwdata->conf); u32 shift = GET_SHIFT(hwdata->conf); const u32 clk_src_266 = 2; - u32 bitmask; + u32 msk, val, bitmask; + int ret; /* * As per the HW manual, we should not directly switch from 533 MHz to @@ -202,14 +203,10 @@ static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index) * the index to value mapping is done by adding 1 to the index. */ bitmask = (GENMASK(GET_WIDTH(hwdata->conf) - 1, 0) << shift) << 16; + msk = off ? CPG_CLKSTATUS_SELSDHI1_STS : CPG_CLKSTATUS_SELSDHI0_STS; if (index != clk_src_266) { - u32 msk, val; - int ret; - writel(bitmask | ((clk_src_266 + 1) << shift), priv->base + off); - msk = off ? CPG_CLKSTATUS_SELSDHI1_STS : CPG_CLKSTATUS_SELSDHI0_STS; - ret = readl_poll_timeout(priv->base + CPG_CLKSTATUS, val, !(val & msk), 100, CPG_SDHI_CLK_SWITCH_STATUS_TIMEOUT_US); @@ -221,7 +218,13 @@ static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index) writel(bitmask | ((index + 1) << shift), priv->base + off); - return 0; + ret = readl_poll_timeout(priv->base + CPG_CLKSTATUS, val, + !(val & msk), 100, + CPG_SDHI_CLK_SWITCH_STATUS_TIMEOUT_US); + if (ret) + dev_err(priv->dev, "failed to switch clk source\n"); + + return ret; } static u8 rzg2l_cpg_sd_clk_mux_get_parent(struct clk_hw *hw) -- 2.42.0