From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753239AbdAZJHM (ORCPT ); Thu, 26 Jan 2017 04:07:12 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:46024 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753150AbdAZJGX (ORCPT ); Thu, 26 Jan 2017 04:06:23 -0500 From: Maxime Ripard To: Chen-Yu Tsai , Maxime Ripard , Ulf Hansson Cc: Rob Herring , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, Andre Przywara Subject: [PATCH v4 7/13] mmc: sunxi: Add more debug informations Date: Thu, 26 Jan 2017 10:06:00 +0100 Message-Id: <97cb930c7287da4db2948f2da8e69484dc7cc2e9.1485421557.git-series.maxime.ripard@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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) -- git-series 0.8.11