[PATCH net-next v6 3/4] can: cc770: add platform bus driver for the CC770 and AN82527

[PATCH net-next v6 3/4] can: cc770: add platform bus driver for the CC770 and AN82527

[Wolfgang Grandegger]

This driver works with both, static platform data and device tree
bindings. It has been tested on a TQM855L board with two AN82527
CAN controllers on the local bus.

CC: Devicetree-discuss@lists.ozlabs.org
CC: linuxppc-dev@ozlabs.org
CC: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 .../devicetree/bindings/net/can/cc770.txt          |   53 ++++
 drivers/net/can/cc770/Kconfig                      |    7 +
 drivers/net/can/cc770/Makefile                     |    1 +
 drivers/net/can/cc770/cc770_platform.c             |  272 ++++++++++++++++++++
 4 files changed, 333 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/cc770.txt
 create mode 100644 drivers/net/can/cc770/cc770_platform.c

diff --git a/Documentation/devicetree/bindings/net/can/cc770.txt b/Documentation/devicetree/bindings/net/can/cc770.txt
new file mode 100644
index 0000000..77027bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/cc770.txt
@@ -0,0 +1,53 @@
+Memory mapped Bosch CC770 and Intel AN82527 CAN controller
+
+Note: The CC770 is a CAN controller from Bosch, which is 100%
+compatible with the old AN82527 from Intel, but with "bugs" being fixed.
+
+Required properties:
+
+- compatible : should be "bosch,cc770" for the CC770 and "intc,82527"
+	for the AN82527.
+
+- reg : should specify the chip select, address offset and size required
+	to map the registers of the controller. The size is usually 0x80.
+
+- interrupts : property with a value describing the interrupt source
+	(number and sensitivity) required for the controller.
+
+Optional properties:
+
+- bosch,external-clock-frequency : frequency of the external oscillator
+	clock in Hz. Note that the internal clock frequency used by the
+	controller is half of that value. If not specified, a default
+	value of 16000000 (16 MHz) is used.
+
+- bosch,clock-out-frequency : slock frequency in Hz on the CLKOUT pin.
+	If not specified or if the specified value is 0, the CLKOUT pin
+	will be disabled.
+
+- bosch,slew-rate : slew rate of the CLKOUT signal. If not specified,
+	a resonable value will be calculated.
+
+- bosch,disconnect-rx0-input : see data sheet.
+
+- bosch,disconnect-rx1-input : see data sheet.
+
+- bosch,disconnect-tx1-output : see data sheet.
+
+- bosch,polarity-dominant : see data sheet.
+
+- bosch,divide-memory-clock : see data sheet.
+
+- bosch,iso-low-speed-mux : see data sheet.
+
+For further information, please have a look to the CC770 or AN82527.
+
+Examples:
+
+can@3,100 {
+	compatible = "bosch,cc770";
+	reg = <3 0x100 0x80>;
+	interrupts = <2 0>;
+	interrupt-parent = <&mpic>;
+	bosch,external-clock-frequency = <16000000>;
+};
diff --git a/drivers/net/can/cc770/Kconfig b/drivers/net/can/cc770/Kconfig
index 28e4d48..22c07a8 100644
--- a/drivers/net/can/cc770/Kconfig
+++ b/drivers/net/can/cc770/Kconfig
@@ -11,4 +11,11 @@ config CAN_CC770_ISA
 	  connected to the ISA bus using I/O port, memory mapped or
 	  indirect access.
 
+config CAN_CC770_PLATFORM
+	tristate "Generic Platform Bus based CC770 driver"
+	---help---
+	  This driver adds support for the CC770 and AN82527 chips
+	  connected to the "platform bus" (Linux abstraction for directly
+	  to the processor attached devices).
+
 endif
diff --git a/drivers/net/can/cc770/Makefile b/drivers/net/can/cc770/Makefile
index 872ecff..9fb8321 100644
--- a/drivers/net/can/cc770/Makefile
+++ b/drivers/net/can/cc770/Makefile
@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_CAN_CC770) += cc770.o
 obj-$(CONFIG_CAN_CC770_ISA) += cc770_isa.o
+obj-$(CONFIG_CAN_CC770_PLATFORM) += cc770_platform.o
 
 ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/cc770/cc770_platform.c b/drivers/net/can/cc770/cc770_platform.c
new file mode 100644
index 0000000..53115ee
--- /dev/null
+++ b/drivers/net/can/cc770/cc770_platform.c
@@ -0,0 +1,272 @@
+/*
+ * Driver for CC770 and AN82527 CAN controllers on the platform bus
+ *
+ * Copyright (C) 2009, 2011 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+/*
+ * If platform data are used you should have similar definitions
+ * in your board-specific code:
+ *
+ *   static struct cc770_platform_data myboard_cc770_pdata = {
+ *           .osc_freq = 16000000,
+ *           .cir = 0x41,
+ *           .cor = 0x20,
+ *           .bcr = 0x40,
+ *   };
+ *
+ * Please see include/linux/can/platform/cc770.h for description of
+ * above fields.
+ *
+ * If the device tree is used, you need a CAN node definition in your
+ * DTS file similar to:
+ *
+ *   can@3,100 {
+ *           compatible = "bosch,cc770";
+ *           reg = <3 0x100 0x80>;
+ *           interrupts = <2 0>;
+ *           interrupt-parent = <&mpic>;
+ *           bosch,external-clock-frequency = <16000000>;
+ *   };
+ *
+ * See "Documentation/devicetree/bindings/net/can/cc770.txt" for further
+ * information.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/platform/cc770.h>
+
+#include "cc770.h"
+
+#define DRV_NAME "cc770_platform"
+
+MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
+MODULE_DESCRIPTION("Socket-CAN driver for CC770 on the platform bus");
+MODULE_LICENSE("GPL v2");
+
+#define CC770_PLATFORM_CAN_CLOCK  16000000
+
+static u8 cc770_platform_read_reg(const struct cc770_priv *priv, int reg)
+{
+	return ioread8(priv->reg_base + reg);
+}
+
+static void cc770_platform_write_reg(const struct cc770_priv *priv, int reg,
+				     u8 val)
+{
+	iowrite8(val, priv->reg_base + reg);
+}
+
+static int __devinit cc770_get_of_node_data(struct platform_device *pdev,
+					    struct cc770_priv *priv)
+{
+	struct device_node *np = pdev->dev.of_node;
+	const u32 *prop;
+	int prop_size;
+	u32 clkext;
+
+	prop = of_get_property(np, "bosch,external-clock-frequency",
+			       &prop_size);
+	if (prop && (prop_size ==  sizeof(u32)))
+		clkext = *prop;
+	else
+		clkext = CC770_PLATFORM_CAN_CLOCK; /* default */
+	priv->can.clock.freq = clkext;
+
+	/* The system clock may not exceed 10 MHz */
+	if (priv->can.clock.freq > 10000000) {
+		priv->cpu_interface |= CPUIF_DSC;
+		priv->can.clock.freq /= 2;
+	}
+
+	/* The memory clock may not exceed 8 MHz */
+	if (priv->can.clock.freq > 8000000)
+		priv->cpu_interface |= CPUIF_DMC;
+
+	if (of_get_property(np, "bosch,divide-memory-clock", NULL))
+		priv->cpu_interface |= CPUIF_DMC;
+	if (of_get_property(np, "bosch,iso-low-speed-mux", NULL))
+		priv->cpu_interface |= CPUIF_MUX;
+
+	if (!of_get_property(np, "bosch,no-comperator-bypass", NULL))
+		priv->bus_config |= BUSCFG_CBY;
+	if (of_get_property(np, "bosch,disconnect-rx0-input", NULL))
+		priv->bus_config |= BUSCFG_DR0;
+	if (of_get_property(np, "bosch,disconnect-rx1-input", NULL))
+		priv->bus_config |= BUSCFG_DR1;
+	if (of_get_property(np, "bosch,disconnect-tx1-output", NULL))
+		priv->bus_config |= BUSCFG_DT1;
+	if (of_get_property(np, "bosch,polarity-dominant", NULL))
+		priv->bus_config |= BUSCFG_POL;
+
+	prop = of_get_property(np, "bosch,clock-out-frequency", &prop_size);
+	if (prop && (prop_size == sizeof(u32)) && *prop > 0) {
+		u32 cdv = clkext / *prop;
+		int slew;
+
+		if (cdv > 0 && cdv < 16) {
+			priv->cpu_interface |= CPUIF_CEN;
+			priv->clkout |= (cdv - 1) & CLKOUT_CD_MASK;
+
+			prop = of_get_property(np, "bosch,slew-rate",
+					       &prop_size);
+			if (prop && (prop_size == sizeof(u32))) {
+				slew = *prop;
+			} else {
+				/* Determine default slew rate */
+				slew = (CLKOUT_SL_MASK >>
+					CLKOUT_SL_SHIFT) -
+					((cdv * clkext - 1) / 8000000);
+				if (slew < 0)
+					slew = 0;
+			}
+			priv->clkout |= (slew << CLKOUT_SL_SHIFT) &
+				CLKOUT_SL_MASK;
+		} else {
+			dev_dbg(&pdev->dev, "invalid clock-out-frequency\n");
+		}
+	}
+
+	return 0;
+}
+
+static int __devinit cc770_get_platform_data(struct platform_device *pdev,
+					     struct cc770_priv *priv)
+{
+
+	struct cc770_platform_data *pdata = pdev->dev.platform_data;
+
+	priv->can.clock.freq = pdata->osc_freq;
+	if (priv->cpu_interface | CPUIF_DSC)
+		priv->can.clock.freq /= 2;
+	priv->clkout = pdata->cor;
+	priv->bus_config = pdata->bcr;
+	priv->cpu_interface = pdata->cir;
+
+	return 0;
+}
+
+static int __devinit cc770_platform_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	struct cc770_priv *priv;
+	struct resource *mem;
+	resource_size_t mem_size;
+	void __iomem *base;
+	int err, irq;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!mem || irq <= 0)
+		return -ENODEV;
+
+	mem_size = resource_size(mem);
+	if (!request_mem_region(mem->start, mem_size, pdev->name))
+		return -EBUSY;
+
+	base = ioremap(mem->start, mem_size);
+	if (!base) {
+		err = -ENOMEM;
+		goto exit_release_mem;
+	}
+
+	dev = alloc_cc770dev(0);
+	if (!dev) {
+		err = -ENOMEM;
+		goto exit_unmap_mem;
+	}
+
+	dev->irq = irq;
+	priv = netdev_priv(dev);
+	priv->read_reg = cc770_platform_read_reg;
+	priv->write_reg = cc770_platform_write_reg;
+	priv->irq_flags = IRQF_SHARED;
+	priv->reg_base = base;
+
+	if (pdev->dev.of_node)
+		err = cc770_get_of_node_data(pdev, priv);
+	else if (pdev->dev.platform_data)
+		err = cc770_get_platform_data(pdev, priv);
+	else
+		err = -ENODEV;
+	if (err)
+		goto exit_free_cc770;
+
+	dev_dbg(&pdev->dev,
+		 "reg_base=0x%p irq=%d clock=%d cpu_interface=0x%02x "
+		 "bus_config=0x%02x clkout=0x%02x\n",
+		 priv->reg_base, dev->irq, priv->can.clock.freq,
+		 priv->cpu_interface, priv->bus_config, priv->clkout);
+
+	dev_set_drvdata(&pdev->dev, dev);
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	err = register_cc770dev(dev);
+	if (err) {
+		dev_err(&pdev->dev,
+			"couldn't register CC700 device (err=%d)\n", err);
+		goto exit_free_cc770;
+	}
+
+	return 0;
+
+exit_free_cc770:
+	free_cc770dev(dev);
+exit_unmap_mem:
+	iounmap(base);
+exit_release_mem:
+	release_mem_region(mem->start, mem_size);
+
+	return err;
+}
+
+static int __devexit cc770_platform_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = dev_get_drvdata(&pdev->dev);
+	struct cc770_priv *priv = netdev_priv(dev);
+	struct resource *mem;
+
+	unregister_cc770dev(dev);
+	iounmap(priv->reg_base);
+	free_cc770dev(dev);
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	release_mem_region(mem->start, resource_size(mem));
+
+	return 0;
+}
+
+static struct of_device_id __devinitdata cc770_platform_table[] = {
+	{.compatible = "bosch,cc770"}, /* CC770 from Bosch */
+	{.compatible = "intc,82527"},  /* AN82527 from Intel CP */
+	{},
+};
+
+static struct platform_driver cc770_platform_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.of_match_table = cc770_platform_table,
+	},
+	.probe = cc770_platform_probe,
+	.remove = __devexit_p(cc770_platform_remove),
+};
+
+module_platform_driver(cc770_platform_driver);
-- 
1.7.4.1

[PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Wolfgang Grandegger]

This patch enables or updates support for the CC770 and AN82527
CAN controller on the TQM8548 and TQM8xx boards.

CC: devicetree-discuss@lists.ozlabs.org
CC: linuxppc-dev@ozlabs.org
CC: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
---
 arch/powerpc/boot/dts/tqm8548-bigflash.dts |   19 ++++++++++++++-----
 arch/powerpc/boot/dts/tqm8548.dts          |   19 ++++++++++++++-----
 arch/powerpc/boot/dts/tqm8xx.dts           |   25 +++++++++++++++++++++++++
 3 files changed, 53 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/boot/dts/tqm8548-bigflash.dts b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
index 9452c3c..d918752 100644
--- a/arch/powerpc/boot/dts/tqm8548-bigflash.dts
+++ b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
@@ -352,7 +352,7 @@
 		ranges = <
 			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
 			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
-			2 0x0 0xa3000000 0x00008000	// CAN (2 x i82527)
+			2 0x0 0xa3000000 0x00008000	// CAN (2 x CC770)
 			3 0x0 0xa3010000 0x00008000	// NAND FLASH
 
 		>;
@@ -393,18 +393,27 @@
 		};
 
 		/* Note: CAN support needs be enabled in U-Boot */
-		can0@2,0 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,0 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x0 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+			bosch,clock-out-frequency = <16000000>;
 		};
 
-		can1@2,100 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,100 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x100 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
 		};
 
 		/* Note: NAND support needs to be enabled in U-Boot */
diff --git a/arch/powerpc/boot/dts/tqm8548.dts b/arch/powerpc/boot/dts/tqm8548.dts
index 619776f..988d887 100644
--- a/arch/powerpc/boot/dts/tqm8548.dts
+++ b/arch/powerpc/boot/dts/tqm8548.dts
@@ -352,7 +352,7 @@
 		ranges = <
 			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
 			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
-			2 0x0 0xe3000000 0x00008000	// CAN (2 x i82527)
+			2 0x0 0xe3000000 0x00008000	// CAN (2 x CC770)
 			3 0x0 0xe3010000 0x00008000	// NAND FLASH
 
 		>;
@@ -393,18 +393,27 @@
 		};
 
 		/* Note: CAN support needs be enabled in U-Boot */
-		can0@2,0 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,0 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x0 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+			bosch,clock-out-frequency = <16000000>;
 		};
 
-		can1@2,100 {
-			compatible = "intel,82527"; // Bosch CC770
+		can@2,100 {
+			compatible = "bosch,cc770"; // Bosch CC770
 			reg = <2 0x100 0x100>;
 			interrupts = <4 1>;
 			interrupt-parent = <&mpic>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
 		};
 
 		/* Note: NAND support needs to be enabled in U-Boot */
diff --git a/arch/powerpc/boot/dts/tqm8xx.dts b/arch/powerpc/boot/dts/tqm8xx.dts
index f6da7ec..c3dba25 100644
--- a/arch/powerpc/boot/dts/tqm8xx.dts
+++ b/arch/powerpc/boot/dts/tqm8xx.dts
@@ -57,6 +57,7 @@
 
 		ranges = <
 			0x0 0x0 0x40000000 0x800000
+			0x3 0x0 0xc0000000 0x200
 		>;
 
 		flash@0,0 {
@@ -67,6 +68,30 @@
 			bank-width = <4>;
 			device-width = <2>;
 		};
+
+		/* Note: CAN support needs be enabled in U-Boot */
+		can@3,0 {
+			compatible = "intc,82527";
+			reg = <3 0x0 0x80>;
+			interrupts = <8 1>;
+			interrupt-parent = <&PIC>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+			bosch,clock-out-frequency = <16000000>;
+		};
+
+		can@3,100 {
+			compatible = "intc,82527";
+			reg = <3 0x100 0x80>;
+			interrupts = <8 1>;
+			interrupt-parent = <&PIC>;
+			bosch,external-clock-frequency = <16000000>;
+			bosch,disconnect-rx1-input;
+			bosch,disconnect-tx1-output;
+			bosch,iso-low-speed-mux;
+		};
 	};
 
 	soc@fff00000 {
-- 
1.7.4.1

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Benjamin Herrenschmidt]

On Thu, 2011-12-01 at 10:41 +0100, Wolfgang Grandegger wrote:
> This patch enables or updates support for the CC770 and AN82527
> CAN controller on the TQM8548 and TQM8xx boards.

I'm a bit confused by the net-next prefix here. Those patches seem to
be only touching arch/powerpc and seem to be sent primarily toward
netdev with a net-next prefix.

Also there have been at least 3 versions in a couple of days already
without comments nor indication of what was changed...

Can you clarify things a bit please ? It looks like they really should
go to linuxppc-dev (and you can probably drop a bunch of other lists) or
am I missing an important piece of the puzzle ? (Such as patch 1/4 and
2/4 ...)

Let me know if I should just remove them from powerpc patchwork.

Cheers,
Ben.

> CC: devicetree-discuss@lists.ozlabs.org
> CC: linuxppc-dev@ozlabs.org
> CC: Kumar Gala <galak@kernel.crashing.org>
> Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
> ---
>  arch/powerpc/boot/dts/tqm8548-bigflash.dts |   19 ++++++++++++++-----
>  arch/powerpc/boot/dts/tqm8548.dts          |   19 ++++++++++++++-----
>  arch/powerpc/boot/dts/tqm8xx.dts           |   25 +++++++++++++++++++++++++
>  3 files changed, 53 insertions(+), 10 deletions(-)
> 
> diff --git a/arch/powerpc/boot/dts/tqm8548-bigflash.dts b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
> index 9452c3c..d918752 100644
> --- a/arch/powerpc/boot/dts/tqm8548-bigflash.dts
> +++ b/arch/powerpc/boot/dts/tqm8548-bigflash.dts
> @@ -352,7 +352,7 @@
>  		ranges = <
>  			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
>  			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
> -			2 0x0 0xa3000000 0x00008000	// CAN (2 x i82527)
> +			2 0x0 0xa3000000 0x00008000	// CAN (2 x CC770)
>  			3 0x0 0xa3010000 0x00008000	// NAND FLASH
>  
>  		>;
> @@ -393,18 +393,27 @@
>  		};
>  
>  		/* Note: CAN support needs be enabled in U-Boot */
> -		can0@2,0 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,0 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x0 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +			bosch,clock-out-frequency = <16000000>;
>  		};
>  
> -		can1@2,100 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,100 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x100 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
>  		};
>  
>  		/* Note: NAND support needs to be enabled in U-Boot */
> diff --git a/arch/powerpc/boot/dts/tqm8548.dts b/arch/powerpc/boot/dts/tqm8548.dts
> index 619776f..988d887 100644
> --- a/arch/powerpc/boot/dts/tqm8548.dts
> +++ b/arch/powerpc/boot/dts/tqm8548.dts
> @@ -352,7 +352,7 @@
>  		ranges = <
>  			0 0x0 0xfc000000 0x04000000	// NOR FLASH bank 1
>  			1 0x0 0xf8000000 0x08000000	// NOR FLASH bank 0
> -			2 0x0 0xe3000000 0x00008000	// CAN (2 x i82527)
> +			2 0x0 0xe3000000 0x00008000	// CAN (2 x CC770)
>  			3 0x0 0xe3010000 0x00008000	// NAND FLASH
>  
>  		>;
> @@ -393,18 +393,27 @@
>  		};
>  
>  		/* Note: CAN support needs be enabled in U-Boot */
> -		can0@2,0 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,0 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x0 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +			bosch,clock-out-frequency = <16000000>;
>  		};
>  
> -		can1@2,100 {
> -			compatible = "intel,82527"; // Bosch CC770
> +		can@2,100 {
> +			compatible = "bosch,cc770"; // Bosch CC770
>  			reg = <2 0x100 0x100>;
>  			interrupts = <4 1>;
>  			interrupt-parent = <&mpic>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
>  		};
>  
>  		/* Note: NAND support needs to be enabled in U-Boot */
> diff --git a/arch/powerpc/boot/dts/tqm8xx.dts b/arch/powerpc/boot/dts/tqm8xx.dts
> index f6da7ec..c3dba25 100644
> --- a/arch/powerpc/boot/dts/tqm8xx.dts
> +++ b/arch/powerpc/boot/dts/tqm8xx.dts
> @@ -57,6 +57,7 @@
>  
>  		ranges = <
>  			0x0 0x0 0x40000000 0x800000
> +			0x3 0x0 0xc0000000 0x200
>  		>;
>  
>  		flash@0,0 {
> @@ -67,6 +68,30 @@
>  			bank-width = <4>;
>  			device-width = <2>;
>  		};
> +
> +		/* Note: CAN support needs be enabled in U-Boot */
> +		can@3,0 {
> +			compatible = "intc,82527";
> +			reg = <3 0x0 0x80>;
> +			interrupts = <8 1>;
> +			interrupt-parent = <&PIC>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +			bosch,clock-out-frequency = <16000000>;
> +		};
> +
> +		can@3,100 {
> +			compatible = "intc,82527";
> +			reg = <3 0x100 0x80>;
> +			interrupts = <8 1>;
> +			interrupt-parent = <&PIC>;
> +			bosch,external-clock-frequency = <16000000>;
> +			bosch,disconnect-rx1-input;
> +			bosch,disconnect-tx1-output;
> +			bosch,iso-low-speed-mux;
> +		};
>  	};
>  
>  	soc@fff00000 {

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[David Miller]

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Wed, 07 Dec 2011 18:34:28 +1100

> Let me know if I should just remove them from powerpc patchwork.

These are DT entries for CAN devices for which drivers only exist in
the net-next tree, I already included this patch into the net-next
tree so you do not have to.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Benjamin Herrenschmidt]

On Wed, 2011-12-07 at 02:39 -0500, David Miller wrote:
> From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Date: Wed, 07 Dec 2011 18:34:28 +1100
> 
> > Let me know if I should just remove them from powerpc patchwork.
> 
> These are DT entries for CAN devices for which drivers only exist in
> the net-next tree, I already included this patch into the net-next
> tree so you do not have to.

Thanks.

Cheers,
Ben.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Wolfgang Grandegger]

On 12/07/2011 08:34 AM, Benjamin Herrenschmidt wrote:
> On Thu, 2011-12-01 at 10:41 +0100, Wolfgang Grandegger wrote:
>> This patch enables or updates support for the CC770 and AN82527
>> CAN controller on the TQM8548 and TQM8xx boards.
> 
> I'm a bit confused by the net-next prefix here. Those patches seem to
> be only touching arch/powerpc and seem to be sent primarily toward
> netdev with a net-next prefix.

These patches are part of a series implementing a new netdev CAN driver
with device-tree support for CC770/i82527 CAN controllers. The
device-tree support and bindings are properly documented and some DTS
files have been updated accordingly. The relevant maintainers and
mailing list have been addressed.

> Also there have been at least 3 versions in a couple of days already
> without comments nor indication of what was changed...

Unfortunately, no response from those sub-system guys.

> Can you clarify things a bit please ? It looks like they really should
> go to linuxppc-dev (and you can probably drop a bunch of other lists) or
> am I missing an important piece of the puzzle ? (Such as patch 1/4 and
> 2/4 ...)

I have not sent the  whole series. The changes are documented in the
cover-letter, which I have not sent for those patches. Well, I think
it's better to sent the whole series to all parties instead?

> Let me know if I should just remove them from powerpc patchwork.

Dave has already applied all patches.

Sorry for the confusion. Any advice on how to handle multi subsystem
series of patches properly is welcome.

Wolfgang.

Re: [PATCH net-next v6 4/4] powerpc: tqm8548/tqm8xx: add and update CAN device nodes

[Benjamin Herrenschmidt]

On Wed, 2011-12-07 at 09:25 +0100, Wolfgang Grandegger wrote:

> > Also there have been at least 3 versions in a couple of days already
> > without comments nor indication of what was changed...
> 
> Unfortunately, no response from those sub-system guys.
> 
> > Can you clarify things a bit please ? It looks like they really should
> > go to linuxppc-dev (and you can probably drop a bunch of other lists) or
> > am I missing an important piece of the puzzle ? (Such as patch 1/4 and
> > 2/4 ...)
> 
> I have not sent the  whole series. The changes are documented in the
> cover-letter, which I have not sent for those patches. Well, I think
> it's better to sent the whole series to all parties instead?

Well at least for linuxppc-dev, don't bother now that I know what this
is about :-)

> > Let me know if I should just remove them from powerpc patchwork.
> 
> Dave has already applied all patches.
> 
> Sorry for the confusion. Any advice on how to handle multi subsystem
> series of patches properly is welcome.

No specific advice. Ideally, if patchwork could track cover letters it
would help but I don't see a non-nasty way to do it so ... :-)

Cheers,
Ben.