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Subject[PATCH v2 1/4] phy: rcar-gen3-usb2: check dr_mode for otg mode
Date
The previous code assumed a channel has otg capability if a channel
has interrupt property. But, it is not good because:
- Battery charging feature also needs interrupt property.
- Some R-Car Gen3 SoCs (e.g. R-Car D3) doesn't have OTG capability.

So, this patch checks whether usb 2.0 host node has dr_mode property or
not. If it has 'dr_mode = "otg";', this driver enables otg capability.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
---
drivers/phy/renesas/phy-rcar-gen3-usb2.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index 54c3429..e00e99a 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -1,7 +1,7 @@
/*
* Renesas R-Car Gen3 for USB2.0 PHY driver
*
- * Copyright (C) 2015 Renesas Electronics Corporation
+ * Copyright (C) 2015-2017 Renesas Electronics Corporation
*
* This is based on the phy-rcar-gen2 driver:
* Copyright (C) 2014 Renesas Solutions Corp.
@@ -22,6 +22,7 @@
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
+#include <linux/usb/of.h>
#include <linux/workqueue.h>

/******* USB2.0 Host registers (original offset is +0x200) *******/
@@ -415,13 +416,16 @@ 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;
-
INIT_WORK(&channel->work, rcar_gen3_phy_usb2_work);
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);
+ }
+
+ if (of_usb_get_dr_mode_by_phy(dev->of_node, 0) == USB_DR_MODE_OTG) {
+ int ret;
+
channel->has_otg = true;
channel->extcon = devm_extcon_dev_allocate(dev,
rcar_gen3_phy_cable);
--
1.9.1
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