From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerome Brunet Subject: [PATCH 2/2] mmc: meson-gx: add device reset Date: Tue, 15 May 2018 11:57:48 +0200 Message-ID: <20180515095748.6794-3-jbrunet@baylibre.com> References: <20180515095748.6794-1-jbrunet@baylibre.com> Return-path: In-Reply-To: <20180515095748.6794-1-jbrunet@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org To: Ulf Hansson , Carlo Caione , Kevin Hilman Cc: Jerome Brunet , devicetree@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org Trigger the reset line of the mmc controller while probing, if available. The reset should be optional for now, at least until all related DT nodes have the reset property. Reviewed-by: Kevin Hilman Signed-off-by: Jerome Brunet --- drivers/mmc/host/meson-gx-mmc.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 4f972b879fe6..9bca359f7936 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include #include @@ -1184,6 +1185,14 @@ static int meson_mmc_probe(struct platform_device *pdev) goto free_host; } + ret = device_reset_optional(&pdev->dev); + if (ret) { + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "device reset failed: %d\n", ret); + + return ret; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); host->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(host->regs)) { -- 2.14.3