[PATCH/RFC 04/10] phy: rcar-gen3-usb2: add extcon support

[Yoshihiro Shimoda]

This patch adds extcon support for otg related channel.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
---
 drivers/phy/Kconfig              |  1 +
 drivers/phy/phy-rcar-gen3-usb2.c | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index e7e117d..6d0e625 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 OF && ARCH_SHMOBILE
+       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 2da2148..5ff5653 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>
@@ -76,6 +77,7 @@
 
 struct rcar_gen3_chan {
        void __iomem *base;
+       struct extcon_dev *extcon;
        struct phy *phy;
        bool has_otg;
 };
@@ -125,6 +127,9 @@ 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)
@@ -132,6 +137,9 @@ 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)
@@ -250,6 +258,12 @@ 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;
@@ -275,11 +289,23 @@ 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); */
-- 
1.9.1