linux-kernel - [PATCH 3/4] phy: rcar-gen3-usb2: add SoC-specific parameter for dedicated pins

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Date:   Thu, 31 Aug 2017 16:31:11 +0900
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     kishon@...com
Cc:     linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
Subject: [PATCH 3/4] phy: rcar-gen3-usb2: add SoC-specific parameter for dedicated pins

This patch adds SoC-specific parameter to avoid reading/writing
specific registers wronly if this driver runs on a SoC which doesn't
have dedicated pins (e.g. R-Car D3).

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
---
 drivers/phy/renesas/phy-rcar-gen3-usb2.c | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index 4ea9902..28ebc98 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -18,6 +18,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_device.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
@@ -80,6 +81,8 @@
 #define USB2_ADPCTRL_IDPULLUP		BIT(5)	/* 1 = ID sampling is enabled */
 #define USB2_ADPCTRL_DRVVBUS		BIT(4)
 
+#define RCAR_GEN3_PHY_HAS_DEDICATED_PINS	1
+
 struct rcar_gen3_chan {
 	void __iomem *base;
 	struct extcon_dev *extcon;
@@ -400,9 +403,18 @@ static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
 }
 
 static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
-	{ .compatible = "renesas,usb2-phy-r8a7795" },
-	{ .compatible = "renesas,usb2-phy-r8a7796" },
-	{ .compatible = "renesas,rcar-gen3-usb2-phy" },
+	{
+		.compatible = "renesas,usb2-phy-r8a7795",
+		.data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
+	},
+	{
+		.compatible = "renesas,usb2-phy-r8a7796",
+		.data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
+	},
+	{
+		.compatible = "renesas,rcar-gen3-usb2-phy",
+		.data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
+	},
 	{ }
 };
 MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
@@ -446,9 +458,12 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
 	}
 
 	if (of_usb_get_dr_mode_by_phy(dev->of_node, 0) == USB_DR_MODE_OTG) {
-		int ret;
+		int ret, dedicated_pins;
+		const struct of_device_id *of_id =
+			of_match_device(rcar_gen3_phy_usb2_match_table, dev);
 
-		channel->has_otg = true;
+		dedicated_pins = of_id ? (uintptr_t)of_id->data : 0;
+		channel->has_otg = !!dedicated_pins;
 		channel->can_role_swap = true;
 		channel->extcon = devm_extcon_dev_allocate(dev,
 							rcar_gen3_phy_cable);
-- 
1.9.1