Commit 7465d7b6 authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
Browse files

usb: xhci-mtk: support option to disable usb2 ports 



Add support to disable specific usb2 host ports, it's useful when
a usb2 port is disabled on some platforms, but enabled on others
for the same SoC.

Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1629189389-18779-4-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7f85c16f

drivers/usb/host/xhci-mtk.c

+10 −2
Original line number Diff line number Diff line
@@ -115,8 +115,11 @@ static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk) 
		writel(value, &ippc->u3_ctrl_p[i]);

	}



	/* power on and enable all u2 ports */

	/* power on and enable all u2 ports except skipped ones */

	for (i = 0; i < mtk->num_u2_ports; i++) {

		if (BIT(i) & mtk->u2p_dis_msk)

			continue;



		value = readl(&ippc->u2_ctrl_p[i]);

		value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);

		value |= CTRL_U2_PORT_HOST_SEL;
@@ -163,8 +166,11 @@ static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk) 
		writel(value, &ippc->u3_ctrl_p[i]);

	}



	/* power down all u2 ports */

	/* power down all u2 ports except skipped ones */

	for (i = 0; i < mtk->num_u2_ports; i++) {

		if (BIT(i) & mtk->u2p_dis_msk)

			continue;



		value = readl(&ippc->u2_ctrl_p[i]);

		value |= CTRL_U2_PORT_PDN;

		writel(value, &ippc->u2_ctrl_p[i]);
@@ -444,6 +450,8 @@ static int xhci_mtk_probe(struct platform_device *pdev) 
	/* optional property, ignore the error if it does not exist */

	of_property_read_u32(node, "mediatek,u3p-dis-msk",

			     &mtk->u3p_dis_msk);

	of_property_read_u32(node, "mediatek,u2p-dis-msk",

			     &mtk->u2p_dis_msk);



	ret = usb_wakeup_of_property_parse(mtk, node);

	if (ret) {

drivers/usb/host/xhci-mtk.h

+1 −0
Original line number Diff line number Diff line
@@ -138,6 +138,7 @@ struct xhci_hcd_mtk { 
	struct mu3c_ippc_regs __iomem *ippc_regs;

	int num_u2_ports;

	int num_u3_ports;

	int u2p_dis_msk;

	int u3p_dis_msk;

	struct regulator *vusb33;

	struct regulator *vbus;