From patchwork Fri Jan 27 21:38:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 9542701 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 65852601D7 for ; Fri, 27 Jan 2017 21:45:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4E7C8276D6 for ; Fri, 27 Jan 2017 21:45:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4254827F9F; Fri, 27 Jan 2017 21:45:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00 autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DD1FE276D6 for ; Fri, 27 Jan 2017 21:45:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cXEKK-0004Mt-As; Fri, 27 Jan 2017 21:45:00 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cXEFC-00084o-RO for linux-arm-kernel@lists.infradead.org; Fri, 27 Jan 2017 21:39:51 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 779C520DED; Fri, 27 Jan 2017 22:39:13 +0100 (CET) Received: from localhost (LFbn-1-2281-83.w90-76.abo.wanadoo.fr [90.76.98.83]) by mail.free-electrons.com (Postfix) with ESMTPSA id 016AE20DF1; Fri, 27 Jan 2017 22:38:55 +0100 (CET) From: Maxime Ripard To: Chen-Yu Tsai , Maxime Ripard , Ulf Hansson Subject: [PATCH v5 7/13] mmc: sunxi: Add more debug informations Date: Fri, 27 Jan 2017 22:38:39 +0100 Message-Id: X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170127_133943_309084_A5EB61B0 X-CRM114-Status: GOOD ( 14.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Andre Przywara , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Rob Herring , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add a bit more debug messages that can be helpful when debugging the clock setup. Also fill the actual_clock field in struct mmc_host to report properly the current frequency in debugfs. Signed-off-by: Maxime Ripard Tested-by: Florian Vaussard --- drivers/mmc/host/sunxi-mmc.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index f0f6922bca8a..6ffcd2838272 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -661,6 +661,9 @@ static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host *host, u32 oclk_en) unsigned long expire = jiffies + msecs_to_jiffies(750); u32 rval; + dev_dbg(mmc_dev(host->mmc), "%sabling the clock\n", + oclk_en ? "en" : "dis"); + rval = mmc_readl(host, REG_CLKCR); rval &= ~(SDXC_CARD_CLOCK_ON | SDXC_LOW_POWER_ON | SDXC_MASK_DATA0); @@ -737,6 +740,7 @@ static int sunxi_mmc_clk_set_phase(struct sunxi_mmc_host *host, index = SDXC_CLK_50M_DDR; } } else { + dev_dbg(mmc_dev(host->mmc), "Invalid clock... returning\n"); return -EINVAL; } @@ -749,6 +753,7 @@ static int sunxi_mmc_clk_set_phase(struct sunxi_mmc_host *host, static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, struct mmc_ios *ios) { + struct mmc_host *mmc = host->mmc; long rate; u32 rval, clock = ios->clock; int ret; @@ -757,6 +762,9 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, if (ret) return ret; + /* Our clock is gated now */ + mmc->actual_clock = 0; + if (!ios->clock) return 0; @@ -767,17 +775,17 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, rate = clk_round_rate(host->clk_mmc, clock); if (rate < 0) { - dev_err(mmc_dev(host->mmc), "error rounding clk to %d: %ld\n", + dev_err(mmc_dev(mmc), "error rounding clk to %d: %ld\n", clock, rate); return rate; } - dev_dbg(mmc_dev(host->mmc), "setting clk to %d, rounded %ld\n", + dev_dbg(mmc_dev(mmc), "setting clk to %d, rounded %ld\n", clock, rate); /* setting clock rate */ ret = clk_set_rate(host->clk_mmc, rate); if (ret) { - dev_err(mmc_dev(host->mmc), "error setting clk to %ld: %d\n", + dev_err(mmc_dev(mmc), "error setting clk to %ld: %d\n", rate, ret); return ret; } @@ -812,7 +820,14 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, * least on the A64). */ - return sunxi_mmc_oclk_onoff(host, 1); + ret = sunxi_mmc_oclk_onoff(host, 1); + if (ret) + return ret; + + /* And we just enabled our clock back */ + mmc->actual_clock = rate; + + return 0; } static void sunxi_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)