phy: rcar-gen3-usb2: add extcon support

This patch adds extcon support for otg related channel.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

2 files changed, 27 insertions, 0 deletions

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index a72d73cdaef3..447cb7c1a18d 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -121,6 +121,7 @@ config PHY_RCAR_GEN2
 config PHY_RCAR_GEN3_USB2
         tristate "Renesas R-Car generation 3 USB 2.0 PHY driver"
         depends on ARCH_RENESAS
+        depends on EXTCON
         select GENERIC_PHY
         help
           Support for USB 2.0 PHY found on Renesas R-Car generation 3 SoCs.
diff --git a/drivers/phy/phy-rcar-gen3-usb2.c b/drivers/phy/phy-rcar-gen3-usb2.c
index 7b14244be285..76bb88f0700a 100644
--- a/drivers/phy/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/phy-rcar-gen3-usb2.c
@@ -12,6 +12,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/extcon.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -77,6 +78,7 @@
 
 struct rcar_gen3_chan {
         void __iomem *base;
+        struct extcon_dev *extcon;
         struct phy *phy;
         struct regulator *vbus;
         bool has_otg;
@@ -127,6 +129,9 @@ static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
         rcar_gen3_set_linectrl(ch, 1, 1);
         rcar_gen3_set_host_mode(ch, 1);
         rcar_gen3_enable_vbus_ctrl(ch, 1);
+
+        extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, true);
+        extcon_set_cable_state_(ch->extcon, EXTCON_USB, false);
 }
 
 static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
@@ -134,6 +139,9 @@ static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
         rcar_gen3_set_linectrl(ch, 0, 1);
         rcar_gen3_set_host_mode(ch, 0);
         rcar_gen3_enable_vbus_ctrl(ch, 0);
+
+        extcon_set_cable_state_(ch->extcon, EXTCON_USB_HOST, false);
+        extcon_set_cable_state_(ch->extcon, EXTCON_USB, true);
 }
 
 static bool rcar_gen3_check_vbus(struct rcar_gen3_chan *ch)
@@ -272,6 +280,12 @@ static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
 };
 MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
 
+static const unsigned int rcar_gen3_phy_cable[] = {
+        EXTCON_USB,
+        EXTCON_USB_HOST,
+        EXTCON_NONE,
+};
+
 static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
@@ -297,11 +311,23 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
         /* call request_irq for OTG */
         irq = platform_get_irq(pdev, 0);
         if (irq >= 0) {
+                int ret;
+
                 irq = devm_request_irq(dev, irq, rcar_gen3_phy_usb2_irq,
                                        IRQF_SHARED, dev_name(dev), channel);
                 if (irq < 0)
                         dev_err(dev, "No irq handler (%d)\n", irq);
                 channel->has_otg = true;
+                channel->extcon = devm_extcon_dev_allocate(dev,
+                                                        rcar_gen3_phy_cable);
+                if (IS_ERR(channel->extcon))
+                        return PTR_ERR(channel->extcon);
+
+                ret = devm_extcon_dev_register(dev, channel->extcon);
+                if (ret < 0) {
+                        dev_err(dev, "Failed to register extcon\n");
+                        return ret;
+                }
         }
 
         /* devm_phy_create() will call pm_runtime_enable(dev); */