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[78.145.240.98]) by mx.google.com with ESMTPSA id vm8sm6061485wjc.27.2014.05.15.02.37.50 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 15 May 2014 02:37:51 -0700 (PDT) From: srinivas.kandagatla@linaro.org To: Russell King , Ulf Hansson , linux-mmc@vger.kernel.org Cc: Chris Ball , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linus.walleij@linaro.org, Srinivas Kandagatla Subject: [PATCH v2 12/14] mmc: mmci: add support for fbclk to latch data and cmd. Date: Thu, 15 May 2014 10:37:49 +0100 Message-Id: <1400146669-30302-1-git-send-email-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1400146447-29803-1-git-send-email-srinivas.kandagatla@linaro.org> References: <1400146447-29803-1-git-send-email-srinivas.kandagatla@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: srinivas.kandagatla@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.220.178 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , From: Srinivas Kandagatla This patch adds support to fbclk that is used to latch data and cmd on some controllers like SD Card controller in Qcom SOC. Signed-off-by: Srinivas Kandagatla --- drivers/mmc/host/mmci.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 05ae654..bc7b80d 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -54,6 +54,8 @@ static unsigned int fmax = 515633; * @clkreg_enable: enable value for MMCICLOCK register * @clkreg_8bit_bus_enable: enable value for 8 bit bus * @clkreg_neg_edge_enable: enable value for inverted data/cmd output + * @clkreg_fbclk_latch: enable value to select feedback clock to + * latch data and command comming in. * @datalength_bits: number of bits in the MMCIDATALENGTH register * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY * is asserted (likewise for RX) @@ -79,6 +81,7 @@ struct variant_data { unsigned int clkreg_enable; unsigned int clkreg_8bit_bus_enable; unsigned int clkreg_neg_edge_enable; + unsigned int clkreg_fbclk_latch; unsigned int datalength_bits; unsigned int fifosize; unsigned int fifohalfsize; @@ -189,6 +192,7 @@ static struct variant_data variant_qcom = { .clkreg = MCI_CLK_ENABLE, .clkreg_enable = MCI_QCOM_CLK_FLOWENA, .clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8, + .clkreg_fbclk_latch = MCI_QCOM_CLK_FEEDBACK_CLK, .datactrl_mask_ddrmode = MCI_QCOM_CLK_DDR_MODE, .data_cmd_enable = MCI_QCOM_CSPM_DATCMD, .blksz_datactrl4 = true, @@ -343,6 +347,7 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) host->cclk = host->mclk / (2 * (clk + 1)); } + clk |= variant->clkreg_fbclk_latch; clk |= variant->clkreg_enable; clk |= MCI_CLK_ENABLE; /* This hasn't proven to be worthwhile */