linux-kernel - [PATCH 2/2] USB: host: ehci-atmel: Add support for HSIC phy

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Date:   Fri, 10 Sep 2021 19:38:42 +0300
From:   <cristian.birsan@...rochip.com>
To:     <stern@...land.harvard.edu>, <gregkh@...uxfoundation.org>,
        <nicolas.ferre@...rochip.com>, <ada@...rsis.com>,
        <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>
CC:     <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Cristian Birsan <cristian.birsan@...rochip.com>
Subject: [PATCH 2/2] USB: host: ehci-atmel: Add support for HSIC phy

From: Cristian Birsan <cristian.birsan@...rochip.com>

Add support for USB Host High Speed Port HSIC phy.

Signed-off-by: Cristian Birsan <cristian.birsan@...rochip.com>
---
 drivers/usb/host/ehci-atmel.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index e893467d659c..05d41fd65f25 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -18,6 +18,8 @@
 #include <linux/platform_device.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/of.h>
 
 #include "ehci.h"
 
@@ -25,6 +27,9 @@
 
 static const char hcd_name[] = "ehci-atmel";
 
+#define EHCI_INSNREG(index)			((index) * 4 + 0x90)
+#define EHCI_INSNREG08_HSIC_EN			BIT(2)
+
 /* interface and function clocks */
 #define hcd_to_atmel_ehci_priv(h) \
 	((struct atmel_ehci_priv *)hcd_to_ehci(h)->priv)
@@ -154,6 +159,9 @@ static int ehci_atmel_drv_probe(struct platform_device *pdev)
 		goto fail_add_hcd;
 	device_wakeup_enable(hcd->self.controller);
 
+	if (of_usb_get_phy_mode(pdev->dev.of_node) == USBPHY_INTERFACE_MODE_HSIC)
+		writel(EHCI_INSNREG08_HSIC_EN, hcd->regs + EHCI_INSNREG(8));
+
 	return retval;
 
 fail_add_hcd:
-- 
2.25.1