diff options
| author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2021-08-17 16:36:24 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-26 13:39:20 +0200 |
| commit | 7465d7b66ac73db87b9eb99be01500093f80b575 (patch) | |
| tree | 799eee2b02d799313df3ba212af2948017bb7fff /drivers/usb | |
| parent | 7f85c16f40d8be5656fb3476909db5c3a5a9c6ea (diff) | |
| download | lwn-7465d7b66ac73db87b9eb99be01500093f80b575.tar.gz lwn-7465d7b66ac73db87b9eb99be01500093f80b575.zip | |
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: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1629189389-18779-4-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-mtk.c | 12 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-mtk.h | 1 |
2 files changed, 11 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index cb27569186a0..8f27edac9ee3 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -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) { diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h index ace432356c41..0466bc8f7500 100644 --- a/drivers/usb/host/xhci-mtk.h +++ b/drivers/usb/host/xhci-mtk.h @@ -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; |