From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ludovic Barre Subject: [PATCH 16/19] mmc: mmci: add DT bindings for STM32 sdmmc Date: Tue, 12 Jun 2018 15:14:37 +0200 Message-ID: <1528809280-31116-17-git-send-email-ludovic.Barre@st.com> References: <1528809280-31116-1-git-send-email-ludovic.Barre@st.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1528809280-31116-1-git-send-email-ludovic.Barre@st.com> Sender: linux-kernel-owner@vger.kernel.org To: Ulf Hansson , Rob Herring Cc: Maxime Coquelin , Alexandre Torgue , Gerald Baeza , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, Ludovic Barre List-Id: devicetree@vger.kernel.org From: Ludovic Barre STM32 sdmmc variant has support to: -Indicate signal directions (only one property for d0dir, d123dir, cmd_dir) -Select command and data phase relation. -Select "clock in" from an external driver. Signed-off-by: Ludovic Barre --- Documentation/devicetree/bindings/mmc/mmci.txt | 9 +++++++++ drivers/mmc/host/mmci.c | 6 ++++++ 2 files changed, 15 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmci.txt b/Documentation/devicetree/bindings/mmc/mmci.txt index e952707..d678933 100644 --- a/Documentation/devicetree/bindings/mmc/mmci.txt +++ b/Documentation/devicetree/bindings/mmc/mmci.txt @@ -19,6 +19,7 @@ Optional properties: the ID provided by the HW - vqmmc-supply : phandle to the regulator device tree node, mentioned as the VCCQ/VDD_IO supply in the eMMC/SD specs. +specific for ux500 variant: - st,sig-dir-dat0 : bus signal direction pin used for DAT[0]. - st,sig-dir-dat2 : bus signal direction pin used for DAT[2]. - st,sig-dir-dat31 : bus signal direction pin used for DAT[3] and DAT[1]. @@ -26,6 +27,14 @@ Optional properties: - st,sig-dir-cmd : cmd signal direction pin used for CMD. - st,sig-pin-fbclk : feedback clock signal pin used. +specific for sdmmc variant: +- st,sig-dir : signal direction polarity used for cmd, dat0 dat123. +- st,neg-edge : data & command phase relation, generated on + sd clock falling edge. +- st,use-ckin : use ckin pin from an external driver to sample + the receive data (example: with voltage + switch transceiver). + Deprecated properties: - mmc-cap-mmc-highspeed : indicates whether MMC is high speed capable. - mmc-cap-sd-highspeed : indicates whether SD is high speed capable. diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index e24fd1e..86aef4f 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1328,6 +1328,12 @@ static int mmci_of_parse(struct device_node *np, struct mmc_host *mmc) host->pwr_reg_add |= MCI_ST_CMDDIREN; if (of_get_property(np, "st,sig-pin-fbclk", NULL)) host->pwr_reg_add |= MCI_ST_FBCLKEN; + if (of_get_property(np, "st,sig-dir", NULL)) + host->pwr_reg_add |= MCI_STM32_DIRPOL; + if (of_get_property(np, "st,neg-edge", NULL)) + host->clk_reg_add |= MCI_STM32_CLK_NEGEDGE; + if (of_get_property(np, "st,use-ckin ", NULL)) + host->clk_reg_add |= MCI_STM32_CLK_SELCKIN; if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL)) mmc->caps |= MMC_CAP_MMC_HIGHSPEED; -- 2.7.4