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mmc: meson-gx: add device reset

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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 <khilman@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Jerome Brunet 2018-05-15 11:57:48 +02:00 committed by Ulf Hansson
parent c5f9ae6cf2
commit 19c6beaa06
1 changed files with 9 additions and 0 deletions
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9
drivers/mmc/host/meson-gx-mmc.c
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@ -35,6 +35,7 @@
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <linux/interrupt.h>
#include <linux/bitfield.h>
#include <linux/pinctrl/consumer.h>
@ -1212,6 +1213,14 @@ 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)) {