Initial commit for ADAS boards support in 2.19.0

1 files changed, 156 insertions, 0 deletions

diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0010-can-rcar_can-add-enable-and-standby-control-pins.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0010-can-rcar_can-add-enable-and-standby-control-pins.patch
new file mode 100644
index 0000000..38d8e09
--- /dev/null
+++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0010-can-rcar_can-add-enable-and-standby-control-pins.patch
@@ -0,0 +1,156 @@
+From 5d5eef59a48e3b8e0f67c2ab0963d380c7a7399d Mon Sep 17 00:00:00 2001
+From: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
+Date: Mon, 2 May 2016 22:05:53 +0300
+Subject: [PATCH] can: rcar_can: add enable and standby control pins
+
+Add enable and standby can transceiver control pins
+
+Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
+---
+ .../devicetree/bindings/net/can/rcar_can.txt       |  4 ++
+ drivers/net/can/rcar/rcar_can.c                         | 58 +++++++++++++++++-----
+ include/linux/can/platform/rcar_can.h              |  2 +
+ 3 files changed, 51 insertions(+), 13 deletions(-)
+
+diff --git a/Documentation/devicetree/bindings/net/can/rcar_can.txt b/Documentation/devicetree/bindings/net/can/rcar_can.txt
+index 8d40ab2..9293cf8 100644
+--- a/Documentation/devicetree/bindings/net/can/rcar_can.txt
++++ b/Documentation/devicetree/bindings/net/can/rcar_can.txt
+@@ -38,6 +38,7 @@ Optional properties:
+ 			    <0x0> (default) : Peripheral clock (clkp1)
+ 			    <0x1> : Peripheral clock (clkp2)
+ 			    <0x3> : Externally input clock
++- gpios: GPIO used for controlling the enable pin and standby pin
+ 
+ Example
+ -------
+@@ -59,5 +60,8 @@ Board specific .dts file:
+ &can0 {
+ 	pinctrl-0 = <&can0_pins>;
+ 	pinctrl-names = "default";
++	gpios = <&gpio5 29 GPIO_ACTIVE_HIGH /* enable */
++		 &gpio5 30 GPIO_ACTIVE_LOW /* standby */
++		>;
+ 	status = "okay";
+ };
+diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c
+index 788459f..887ca37 100644
+--- a/drivers/net/can/rcar/rcar_can.c
++++ b/drivers/net/can/rcar/rcar_can.c
+@@ -21,6 +21,7 @@
+ #include <linux/clk.h>
+ #include <linux/can/platform/rcar_can.h>
+ #include <linux/of.h>
++#include <linux/of_gpio.h>
+ 
+ #define RCAR_CAN_DRV_NAME	"rcar_can"
+ 
+@@ -94,6 +95,8 @@ struct rcar_can_priv {
+ 	u32 tx_tail;
+ 	u8 clock_select;
+ 	u8 ier;
++	unsigned int enable_pin; /* transceiver enable */
++	unsigned int standby_pin; /* transceiver standby */
+ };
+ 
+ static const struct can_bittiming_const rcar_can_bittiming_const = {
+@@ -505,6 +508,10 @@ static int rcar_can_open(struct net_device *ndev)
+ 	struct rcar_can_priv *priv = netdev_priv(ndev);
+ 	int err;
+ 
++	/* transceiver normal mode */
++	if (gpio_is_valid(priv->standby_pin))
++		gpio_set_value(priv->standby_pin, 1);
++
+ 	err = clk_prepare_enable(priv->clk);
+ 	if (err) {
+ 		netdev_err(ndev,
+@@ -581,6 +588,9 @@ static int rcar_can_close(struct net_device *ndev)
+ 	clk_disable_unprepare(priv->clk);
+ 	close_candev(ndev);
+ 	can_led_event(ndev, CAN_LED_EVENT_STOP);
++	/* transceiver stanby mode */
++	if (gpio_is_valid(priv->standby_pin))
++		gpio_set_value(priv->standby_pin, 0);
+ 	return 0;
+ }
+ 
+@@ -743,20 +753,9 @@ static int rcar_can_probe(struct platform_device *pdev)
+ 	struct resource *mem;
+ 	void __iomem *addr;
+ 	u32 clock_select = CLKR_CLKP1;
+-	int err = -ENODEV;
++	int err = -ENODEV, ret;
+ 	int irq;
+-
+-	if (pdev->dev.of_node) {
+-		of_property_read_u32(pdev->dev.of_node,
+-				     "renesas,can-clock-select", &clock_select);
+-	} else {
+-		pdata = dev_get_platdata(&pdev->dev);
+-		if (!pdata) {
+-			dev_err(&pdev->dev, "No platform data provided!\n");
+-			goto fail;
+-		}
+-		clock_select = pdata->clock_select;
+-	}
++	enum of_gpio_flags enable_flags, standby_flags;
+ 
+ 	irq = platform_get_irq(pdev, 0);
+ 	if (irq < 0) {
+@@ -826,6 +825,39 @@ static int rcar_can_probe(struct platform_device *pdev)
+ 
+ 	devm_can_led_init(ndev);
+ 
++	if (pdev->dev.of_node) {
++		of_property_read_u32(pdev->dev.of_node,
++				     "renesas,can-clock-select", &clock_select);
++		priv->enable_pin = of_get_gpio_flags(pdev->dev.of_node, 0, &enable_flags);
++		priv->standby_pin = of_get_gpio_flags(pdev->dev.of_node, 1, &standby_flags);
++	} else {
++		pdata = dev_get_platdata(&pdev->dev);
++		if (!pdata) {
++			dev_err(&pdev->dev, "No platform data provided!\n");
++			goto fail;
++		}
++		clock_select = pdata->clock_select;
++		priv->enable_pin = pdata->enable_pin;
++		priv->standby_pin = pdata->standby_pin;
++	}
++
++	if (gpio_is_valid(priv->enable_pin)) {
++		int val = enable_flags & OF_GPIO_ACTIVE_LOW ?
++			  GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH;
++		ret = devm_gpio_request_one(&pdev->dev, priv->enable_pin, val, "enable");
++		if (ret)
++			dev_info(&pdev->dev, "Failed to request enable pin\n");
++	}
++
++	if (gpio_is_valid(priv->standby_pin)) {
++		int val = standby_flags & OF_GPIO_ACTIVE_LOW ?
++			  GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH;
++		/* transceiver standby mode */
++		ret = devm_gpio_request_one(&pdev->dev, priv->standby_pin, val, "standby");
++		if (ret)
++			dev_info(&pdev->dev, "Failed to request standby pin\n");
++	}
++
+ 	dev_info(&pdev->dev, "device registered (regs @ %p, IRQ%d)\n",
+ 		 priv->regs, ndev->irq);
+ 
+diff --git a/include/linux/can/platform/rcar_can.h b/include/linux/can/platform/rcar_can.h
+index 0f4a2f3..7ef810d 100644
+--- a/include/linux/can/platform/rcar_can.h
++++ b/include/linux/can/platform/rcar_can.h
+@@ -12,6 +12,8 @@ enum CLKR {
+ 
+ struct rcar_can_platform_data {
+ 	enum CLKR clock_select;	/* Clock source select */
++	unsigned int enable_pin;
++	unsigned int standby_pin;
+ };
+ 
+ #endif	/* !_CAN_PLATFORM_RCAR_CAN_H_ */
+-- 
+1.9.1
+