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usb: xhci-mtk: add support optional controller reset 

Add support controller reset via a reset-controller usually in infracfg,
it's different with the software reset by IPPC which only used to reset MAC,
and it will also reset IPPC meanwhile.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20220523090449.14430-3-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2022-05-23 17:04:48 +08:00 committed by Greg Kroah-Hartman
parent 0efcd08571
commit 32b615ed4b
1 changed files with 7 additions and 0 deletions
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7
drivers/usb/host/xhci-mtk.c
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@ -18,6 +18,7 @@
#include <linux/pm_wakeirq.h> #include <linux/pm_wakeirq.h>
#include <linux/regmap.h> #include <linux/regmap.h>
#include <linux/regulator/consumer.h> #include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include "xhci.h" #include "xhci.h"
#include "xhci-mtk.h" #include "xhci-mtk.h"
@ -550,6 +551,12 @@ static int xhci_mtk_probe(struct platform_device *pdev)
if (ret) if (ret)
goto disable_ldos; goto disable_ldos;
ret = device_reset_optional(dev);
if (ret) {
dev_err_probe(dev, ret, "failed to reset controller\n");
goto disable_clk;
}
hcd = usb_create_hcd(driver, dev, dev_name(dev)); hcd = usb_create_hcd(driver, dev, dev_name(dev));
if (!hcd) { if (!hcd) {
ret = -ENOMEM; ret = -ENOMEM;