From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762815AbdAIQrS (ORCPT ); Mon, 9 Jan 2017 11:47:18 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:38162 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762792AbdAIQrA (ORCPT ); Mon, 9 Jan 2017 11:47:00 -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 v2 2/6] mmc: sunxi: Enable the new timings for the A64 MMC controllers Date: Mon, 9 Jan 2017 17:46:51 +0100 Message-Id: <1c00451acbaa345533cd5b19544d2d492a0decca.1483980339.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 The A64 MMC controllers need to set a "new timings" bit when a new rate is set. The actual meaning of that bit is not clear yet, but not setting it leads to some corner-case issues, like the CMD53 failing, which is used to implement SDIO packet aggregation. Signed-off-by: Maxime Ripard --- drivers/mmc/host/sunxi-mmc.c | 6 ++++++ 1 file changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c index ea9552a0d820..9a860bcac154 100644 --- a/drivers/mmc/host/sunxi-mmc.c +++ b/drivers/mmc/host/sunxi-mmc.c @@ -253,6 +253,8 @@ struct sunxi_mmc_cfg { /* does the IP block support autocalibration? */ bool can_calibrate; + + bool needs_new_timings; }; struct sunxi_mmc_host { @@ -776,6 +778,9 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host, } mmc_writel(host, REG_CLKCR, rval); + if (host->cfg->needs_new_timings) + mmc_writel(host, REG_SD_NTSR, SDXC_2X_TIMING_MODE); + ret = sunxi_mmc_clk_set_phase(host, ios, rate); if (ret) return ret; @@ -1073,6 +1078,7 @@ static const struct sunxi_mmc_cfg sun50i_a64_cfg = { .idma_des_size_bits = 16, .clk_delays = NULL, .can_calibrate = true, + .needs_new_timings = true, }; static const struct of_device_id sunxi_mmc_of_match[] = { -- git-series 0.8.11