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>
davet321 · Apr 30, 2016 · 2b38543 · 2b38543
1 parent 6dcfd7c
commit 2b38543
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diff --git 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
@@ -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;
@@ -127,13 +129,19 @@ 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)
 {
  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); */