[PATCH 1/7] IBM Akebono: Add support to AHCI platform driver

[PATCH 1/7] IBM Akebono: Add support to AHCI platform driver

[Alistair Popple]

The new IBM Akebono board has an AHCI compliant SATA controller. This
patch adds a compatible property for the new board to the AHCI
platform driver.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Cc: linux-ide@vger.kernel.org
---
 drivers/ata/ahci_platform.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 7d3b853..b20b130 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -328,6 +328,7 @@ static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);
 static const struct of_device_id ahci_of_match[] = {
 	{ .compatible = "snps,spear-ahci", },
 	{ .compatible = "snps,exynos5440-ahci", },
+	{ .compatible = "ibm,akebono-ahci", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, ahci_of_match);
-- 
1.7.10.4

[PATCH 2/7] IBM Akebono: Add a SDHCI platform driver

[Alistair Popple]

This patch adds a SDHCI platform driver for the new IBM Akebono board.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Cc: Chris Ball <cjb@laptop.org>
Cc: linux-mmc@vger.kernel.org
---
 drivers/mmc/host/Kconfig            |   12 +++++++
 drivers/mmc/host/Makefile           |    1 +
 drivers/mmc/host/sdhci-of-akebono.c |   60 +++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 drivers/mmc/host/sdhci-of-akebono.c

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 7fc5099..d7a1414 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -130,6 +130,18 @@ config MMC_SDHCI_OF_HLWD
 
 	  If unsure, say N.
 
+config MMC_SDHCI_OF_AKEBONO
+	tristate "SDHCI OF support for the IBM Akebono board"
+	depends on MMC_SDHCI_PLTFM
+	depends on PPC_OF
+	help
+	  This selects the Secure Digital Host Controller Interface (SDHCI)
+	  found on the Akebono 476FP SoC.
+
+	  If you have a controller with this interface, say Y or M here.
+
+	  If unsure, say N.
+
 config MMC_SDHCI_CNS3XXX
 	tristate "SDHCI support on the Cavium Networks CNS3xxx SoC"
 	depends on ARCH_CNS3XXX
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index c41d0c3..ea7e757 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_MMC_SDHCI_DOVE)		+= sdhci-dove.o
 obj-$(CONFIG_MMC_SDHCI_TEGRA)		+= sdhci-tegra.o
 obj-$(CONFIG_MMC_SDHCI_OF_ESDHC)	+= sdhci-of-esdhc.o
 obj-$(CONFIG_MMC_SDHCI_OF_HLWD)		+= sdhci-of-hlwd.o
+obj-$(CONFIG_MMC_SDHCI_OF_AKEBONO)	+= sdhci-of-akebono.o
 obj-$(CONFIG_MMC_SDHCI_BCM_KONA)	+= sdhci-bcm-kona.o
 obj-$(CONFIG_MMC_SDHCI_BCM2835)		+= sdhci-bcm2835.o
 
diff --git a/drivers/mmc/host/sdhci-of-akebono.c b/drivers/mmc/host/sdhci-of-akebono.c
new file mode 100644
index 0000000..20041c1
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-akebono.c
@@ -0,0 +1,60 @@
+/*
+ * drivers/mmc/host/sdhci-of-akebono.c
+ *
+ * Copyright © 2013 Alistair Popple <alistair@popple.id.au> IBM Corporation
+ *
+ * Based on sdhci-of-hlwd.c
+ *
+ * Copyright (C) 2009 The GameCube Linux Team
+ * Copyright (C) 2009 Albert Herranz
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/mmc/host.h>
+#include "sdhci-pltfm.h"
+
+static const struct sdhci_ops sdhci_akebono_ops = {
+};
+
+static const struct sdhci_pltfm_data sdhci_akebono_pdata = {
+	.ops = &sdhci_akebono_ops,
+};
+
+static int sdhci_akebono_probe(struct platform_device *pdev)
+{
+	return sdhci_pltfm_register(pdev, &sdhci_akebono_pdata, 0);
+}
+
+static int sdhci_akebono_remove(struct platform_device *pdev)
+{
+	return sdhci_pltfm_unregister(pdev);
+}
+
+static const struct of_device_id sdhci_akebono_of_match[] = {
+	{ .compatible = "ibm,akebono-sdhci" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sdhci_akebono_of_match);
+
+static struct platform_driver sdhci_akebono_driver = {
+	.driver = {
+		.name = "sdhci-akebono",
+		.owner = THIS_MODULE,
+		.of_match_table = sdhci_akebono_of_match,
+		.pm = SDHCI_PLTFM_PMOPS,
+	},
+	.probe = sdhci_akebono_probe,
+	.remove = sdhci_akebono_remove,
+};
+
+module_platform_driver(sdhci_akebono_driver);
+
+MODULE_DESCRIPTION("Akebono SDHCI OF driver");
+MODULE_AUTHOR("Alistair Popple");
+MODULE_LICENSE("GPL v2");
-- 
1.7.10.4

[PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Alistair Popple]

The IBM Akebono board uses a different ethernet PHY that has wake on
lan (WOL) support with the IBM emac. This patch adds suppot to the IBM
emac driver for this new PHY.

At this stage the wake on lan functionality has not been implemented.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
---
 .../devicetree/bindings/powerpc/4xx/emac.txt       |    9 +
 drivers/net/ethernet/ibm/emac/Kconfig              |    4 +
 drivers/net/ethernet/ibm/emac/Makefile             |    1 +
 drivers/net/ethernet/ibm/emac/core.c               |   50 +++-
 drivers/net/ethernet/ibm/emac/core.h               |   12 +
 drivers/net/ethernet/ibm/emac/rgmii_wol.c          |  262 ++++++++++++++++++++
 drivers/net/ethernet/ibm/emac/rgmii_wol.h          |   62 +++++
 7 files changed, 394 insertions(+), 6 deletions(-)
 create mode 100644 drivers/net/ethernet/ibm/emac/rgmii_wol.c
 create mode 100644 drivers/net/ethernet/ibm/emac/rgmii_wol.h

diff --git a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt b/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
index 712baf6..9928d9d 100644
--- a/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
+++ b/Documentation/devicetree/bindings/powerpc/4xx/emac.txt
@@ -61,6 +61,8 @@
 			  Fox Axon: present, whatever value is appropriate for each
 			  EMAC, that is the content of the current (bogus) "phy-port"
 			  property.
+    - rgmii-wol-device  : 1 cell, required iff conntect to a RGMII in the WKUP
+                          power domain. phandle of the RGMII-WOL device node.
 
     Optional properties:
     - phy-address       : 1 cell, optional, MDIO address of the PHY. If absent,
@@ -146,3 +148,10 @@
 			   available.
 			   For Axon: 0x0000012a
 
+      iv) RGMII-WOL node
+
+    Required properties:
+    - compatible         : compatible list, containing 2 entries, first is
+			   "ibm,rgmii-wol-CHIP" where CHIP is the host ASIC (like
+			   EMAC) and the second is "ibm,rgmii-wol".
+    - reg                : <registers mapping>
diff --git a/drivers/net/ethernet/ibm/emac/Kconfig b/drivers/net/ethernet/ibm/emac/Kconfig
index 3f44a30..7425c27 100644
--- a/drivers/net/ethernet/ibm/emac/Kconfig
+++ b/drivers/net/ethernet/ibm/emac/Kconfig
@@ -55,6 +55,10 @@ config IBM_EMAC_RGMII
 	bool
 	default n
 
+config IBM_EMAC_RGMII_WOL
+	bool
+	default n
+
 config IBM_EMAC_TAH
 	bool
 	default n
diff --git a/drivers/net/ethernet/ibm/emac/Makefile b/drivers/net/ethernet/ibm/emac/Makefile
index eba2183..8843803 100644
--- a/drivers/net/ethernet/ibm/emac/Makefile
+++ b/drivers/net/ethernet/ibm/emac/Makefile
@@ -7,5 +7,6 @@ obj-$(CONFIG_IBM_EMAC) += ibm_emac.o
 ibm_emac-y := mal.o core.o phy.o
 ibm_emac-$(CONFIG_IBM_EMAC_ZMII) += zmii.o
 ibm_emac-$(CONFIG_IBM_EMAC_RGMII) += rgmii.o
+ibm_emac-$(CONFIG_IBM_EMAC_RGMII_WOL) += rgmii_wol.o
 ibm_emac-$(CONFIG_IBM_EMAC_TAH) += tah.o
 ibm_emac-$(CONFIG_IBM_EMAC_DEBUG) += debug.o
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index 6b5c722..fc1a775 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -630,6 +630,8 @@ static int emac_configure(struct emac_instance *dev)
 	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
 		rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port,
 				dev->phy.speed);
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL))
+		rgmii_wol_set_speed(dev->rgmii_wol_dev, dev->phy.speed);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
 		zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed);
 
@@ -797,6 +799,8 @@ static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
 		zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
 		rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL))
+		rgmii_wol_get_mdio(dev->rgmii_wol_dev);
 
 	/* Wait for management interface to become idle */
 	n = 20;
@@ -844,6 +848,8 @@ static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg)
 	DBG2(dev, "mdio_read -> %04x" NL, r);
 	err = 0;
  bail:
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL))
+		rgmii_wol_put_mdio(dev->rgmii_wol_dev);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
 		rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
@@ -869,6 +875,8 @@ static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
 		zmii_get_mdio(dev->zmii_dev, dev->zmii_port);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
 		rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port);
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL))
+		rgmii_wol_get_mdio(dev->rgmii_wol_dev);
 
 	/* Wait for management interface to be idle */
 	n = 20;
@@ -907,6 +915,8 @@ static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg,
 	}
 	err = 0;
  bail:
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL))
+		rgmii_wol_put_mdio(dev->rgmii_wol_dev);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
 		rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port);
 	if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII))
@@ -2275,10 +2285,11 @@ struct emac_depentry {
 #define	EMAC_DEP_MAL_IDX	0
 #define	EMAC_DEP_ZMII_IDX	1
 #define	EMAC_DEP_RGMII_IDX	2
-#define	EMAC_DEP_TAH_IDX	3
-#define	EMAC_DEP_MDIO_IDX	4
-#define	EMAC_DEP_PREV_IDX	5
-#define	EMAC_DEP_COUNT		6
+#define EMAC_DEP_RGMII_WOL_IDX  3
+#define	EMAC_DEP_TAH_IDX	4
+#define	EMAC_DEP_MDIO_IDX	5
+#define	EMAC_DEP_PREV_IDX	6
+#define	EMAC_DEP_COUNT		7
 
 static int emac_check_deps(struct emac_instance *dev,
 			   struct emac_depentry *deps)
@@ -2356,6 +2367,7 @@ static int emac_wait_deps(struct emac_instance *dev)
 	deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph;
 	deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph;
 	deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph;
+	deps[EMAC_DEP_RGMII_WOL_IDX].phandle = dev->rgmii_wol_ph;
 	if (dev->tah_ph)
 		deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph;
 	if (dev->mdio_ph)
@@ -2378,6 +2390,7 @@ static int emac_wait_deps(struct emac_instance *dev)
 		dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
 		dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev;
 		dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev;
+		dev->rgmii_wol_dev = deps[EMAC_DEP_RGMII_WOL_IDX].ofdev;
 		dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
 		dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
 	}
@@ -2583,6 +2596,8 @@ static int emac_init_config(struct emac_instance *dev)
 		dev->rgmii_ph = 0;
 	if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0))
 		dev->rgmii_port = 0xffffffff;
+	if (emac_read_uint_prop(np, "rgmii-wol-device", &dev->rgmii_wol_ph, 0))
+		dev->rgmii_wol_ph = 0;
 	if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0))
 		dev->fifo_entry_size = 16;
 	if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0))
@@ -2669,6 +2684,16 @@ static int emac_init_config(struct emac_instance *dev)
 #endif
 	}
 
+	if (dev->rgmii_wol_ph != 0) {
+#ifdef CONFIG_IBM_EMAC_RGMII_WOL
+		dev->features |= EMAC_FTR_HAS_RGMII_WOL;
+#else
+		printk(KERN_ERR "%s: RGMII WOL support not enabled !\n",
+		       np->full_name);
+		return -ENXIO;
+#endif
+	}
+
 	/* Read MAC-address */
 	p = of_get_property(np, "local-mac-address", NULL);
 	if (p == NULL) {
@@ -2842,10 +2867,15 @@ static int emac_probe(struct platform_device *ofdev)
 	    (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0)
 		goto err_detach_zmii;
 
+	/* Attach to RGMII_WOL, if needed */
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL) &&
+	    (err = rgmii_wol_attach(dev->rgmii_wol_dev, dev->phy_mode)) != 0)
+		goto err_detach_rgmii;
+
 	/* Attach to TAH, if needed */
 	if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) &&
 	    (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0)
-		goto err_detach_rgmii;
+		goto err_detach_rgmii_wol;
 
 	/* Set some link defaults before we can find out real parameters */
 	dev->phy.speed = SPEED_100;
@@ -2918,6 +2948,9 @@ static int emac_probe(struct platform_device *ofdev)
  err_detach_tah:
 	if (emac_has_feature(dev, EMAC_FTR_HAS_TAH))
 		tah_detach(dev->tah_dev, dev->tah_port);
+ err_detach_rgmii_wol:
+	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII_WOL))
+		rgmii_wol_detach(dev->rgmii_wol_dev);
  err_detach_rgmii:
 	if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII))
 		rgmii_detach(dev->rgmii_dev, dev->rgmii_port);
@@ -3079,12 +3112,17 @@ static int __init emac_init(void)
 	rc = tah_init();
 	if (rc)
 		goto err_rgmii;
-	rc = platform_driver_register(&emac_driver);
+	rc = rgmii_wol_init();
 	if (rc)
 		goto err_tah;
+	rc = platform_driver_register(&emac_driver);
+	if (rc)
+		goto err_rgmii_wol;
 
 	return 0;
 
+ err_rgmii_wol:
+	rgmii_wol_exit();
  err_tah:
 	tah_exit();
  err_rgmii:
diff --git a/drivers/net/ethernet/ibm/emac/core.h b/drivers/net/ethernet/ibm/emac/core.h
index 7007479..930a6f6 100644
--- a/drivers/net/ethernet/ibm/emac/core.h
+++ b/drivers/net/ethernet/ibm/emac/core.h
@@ -43,6 +43,7 @@
 #include "phy.h"
 #include "zmii.h"
 #include "rgmii.h"
+#include "rgmii_wol.h"
 #include "mal.h"
 #include "tah.h"
 #include "debug.h"
@@ -210,6 +211,10 @@ struct emac_instance {
 	u32				rgmii_port;
 	struct platform_device		*rgmii_dev;
 
+	/* RGMII WOL infos if any */
+	u32				rgmii_wol_ph;
+	struct platform_device		*rgmii_wol_dev;
+
 	/* TAH infos if any */
 	u32				tah_ph;
 	u32				tah_port;
@@ -333,6 +338,10 @@ struct emac_instance {
  * APM821xx does not support Half Duplex mode
  */
 #define EMAC_FTR_APM821XX_NO_HALF_DUPLEX	0x00001000
+/*
+ * Set if we have a RGMII with wake on LAN.
+ */
+#define EMAC_FTR_HAS_RGMII_WOL		0x00020000
 
 /* Right now, we don't quite handle the always/possible masks on the
  * most optimal way as we don't have a way to say something like
@@ -356,6 +365,9 @@ enum {
 #ifdef CONFIG_IBM_EMAC_RGMII
 	    EMAC_FTR_HAS_RGMII	|
 #endif
+#ifdef CONFIG_IBM_EMAC_RGMII_WOL
+	    EMAC_FTR_HAS_RGMII_WOL	|
+#endif
 #ifdef CONFIG_IBM_EMAC_NO_FLOW_CTRL
 	    EMAC_FTR_NO_FLOW_CONTROL_40x |
 #endif
diff --git a/drivers/net/ethernet/ibm/emac/rgmii_wol.c b/drivers/net/ethernet/ibm/emac/rgmii_wol.c
new file mode 100644
index 0000000..8e0dcf6
--- /dev/null
+++ b/drivers/net/ethernet/ibm/emac/rgmii_wol.c
@@ -0,0 +1,262 @@
+/* drivers/net/ethernet/ibm/emac/rgmii_wol.c
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge with
+ * wake on LAN support.
+ *
+ * Copyright 2013 Alistair Popple, IBM Corp.
+ *                <alistair@popple.id.au>
+ *
+ * Based on rgmii.h:
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/ethtool.h>
+#include <linux/io.h>
+
+#include "emac.h"
+#include "debug.h"
+
+/* RGMII_WOL_REG */
+
+#define WKUP_ETH_RGSPD      0xC0000000
+#define WKUP_ETH_FCSEN      0x20000000
+#define WKUP_ETH_CRSEN      0x02000000
+#define WKUP_ETH_COLEN      0x01000000
+#define WKUP_ETH_TX_OE      0x00040000
+#define WKUP_ETH_RX_IE      0x00020000
+#define WKUP_ETH_RGMIIEN    0x00010000
+
+#define WKUP_ETH_RGSPD_10   0x00000000
+#define WKUP_ETH_RGSPD_100  0x40000000
+#define WKUP_ETH_RGSPD_1000 0x80000000
+
+/* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */
+static inline int rgmii_valid_mode(int phy_mode)
+{
+	return  phy_mode == PHY_MODE_GMII ||
+		phy_mode == PHY_MODE_MII ||
+		phy_mode == PHY_MODE_RGMII ||
+		phy_mode == PHY_MODE_TBI ||
+		phy_mode == PHY_MODE_RTBI;
+}
+
+static inline const char *rgmii_mode_name(int mode)
+{
+	switch (mode) {
+	case PHY_MODE_RGMII:
+		return "RGMII";
+	case PHY_MODE_TBI:
+		return "TBI";
+	case PHY_MODE_GMII:
+		return "GMII";
+	case PHY_MODE_MII:
+		return "MII";
+	case PHY_MODE_RTBI:
+		return "RTBI";
+	default:
+		BUG();
+	}
+}
+
+int rgmii_wol_attach(struct platform_device *ofdev, int mode)
+{
+	struct rgmii_wol_instance *dev = platform_get_drvdata(ofdev);
+
+	dev_dbg(&ofdev->dev, "attach\n");
+
+	/* Check if we need to attach to a RGMII */
+	if (!rgmii_valid_mode(mode)) {
+		dev_err(&ofdev->dev, "unsupported settings !\n");
+		return -ENODEV;
+	}
+
+	mutex_lock(&dev->lock);
+
+	/* Enable this input */
+	out_be32(dev->reg, in_be32(dev->reg) | WKUP_ETH_RGMIIEN
+		 | WKUP_ETH_TX_OE | WKUP_ETH_RX_IE);
+	dev_notice(&ofdev->dev, "in %s mode\n", rgmii_mode_name(mode));
+
+	++dev->users;
+
+	mutex_unlock(&dev->lock);
+
+	return 0;
+}
+
+void rgmii_wol_set_speed(struct platform_device *ofdev, int speed)
+{
+	struct rgmii_wol_instance *dev = platform_get_drvdata(ofdev);
+	u32 reg;
+
+	mutex_lock(&dev->lock);
+
+	reg = in_be32(dev->reg) & ~WKUP_ETH_RGSPD;
+
+	dev_dbg(&ofdev->dev, "speed(%d)\n", speed);
+
+	switch (speed) {
+	case SPEED_1000:
+		reg |= WKUP_ETH_RGSPD_1000;
+		break;
+	case SPEED_100:
+		reg |= WKUP_ETH_RGSPD_100;
+		break;
+	case SPEED_10:
+		reg |= WKUP_ETH_RGSPD_10;
+		break;
+	default:
+		dev_err(&ofdev->dev, "invalid speed set!\n");
+	}
+
+	out_be32(dev->reg, reg);
+
+	mutex_unlock(&dev->lock);
+}
+
+void rgmii_wol_get_mdio(struct platform_device *ofdev)
+{
+	/* MDIO is always enabled when RGMII_WOL is enabled, so we
+	 * don't have to do anything here.
+	 */
+	dev_dbg(&ofdev->dev, "get_mdio\n");
+}
+
+void rgmii_wol_put_mdio(struct platform_device *ofdev)
+{
+	dev_dbg(&ofdev->dev, "put_mdio\n");
+}
+
+void rgmii_wol_detach(struct platform_device *ofdev)
+{
+	struct rgmii_wol_instance *dev = platform_get_drvdata(ofdev);
+
+	BUG_ON(!dev || dev->users == 0);
+
+	mutex_lock(&dev->lock);
+
+	dev_dbg(&ofdev->dev, "detach\n");
+
+	/* Disable this input */
+	out_be32(dev->reg, 0);
+
+	--dev->users;
+
+	mutex_unlock(&dev->lock);
+}
+
+int rgmii_wol_get_regs_len(struct platform_device *ofdev)
+{
+	return sizeof(struct emac_ethtool_regs_subhdr) +
+		sizeof(u32);
+}
+
+void *rgmii_wol_dump_regs(struct platform_device *ofdev, void *buf)
+{
+	struct rgmii_wol_instance *dev = platform_get_drvdata(ofdev);
+	struct emac_ethtool_regs_subhdr *hdr = buf;
+	u32 *regs = (u32 *)(hdr + 1);
+
+	hdr->version = 0;
+	hdr->index = 0; /* for now, are there chips with more than one
+			 * rgmii ? if yes, then we'll add a cell_index
+			 * like we do for emac
+			 */
+	memcpy_fromio(regs, dev->reg, sizeof(u32));
+	return regs + 1;
+}
+
+
+static int rgmii_wol_probe(struct platform_device *ofdev)
+{
+	struct device_node *np = ofdev->dev.of_node;
+	struct rgmii_wol_instance *dev;
+	int rc;
+
+	rc = -ENOMEM;
+	dev = kzalloc(sizeof(struct rgmii_wol_instance), GFP_KERNEL);
+	if (dev == NULL)
+		goto err_gone;
+
+	mutex_init(&dev->lock);
+
+	dev->reg = of_iomap(np, 0);
+	if (!dev->reg) {
+		dev_err(&ofdev->dev, "Can't map registers\n");
+		rc = -ENXIO;
+		goto err_free;
+	}
+
+	/* Check for RGMII flags */
+	if (of_get_property(ofdev->dev.of_node, "has-mdio", NULL))
+		dev->flags |= EMAC_RGMII_FLAG_HAS_MDIO;
+
+	dev_dbg(&ofdev->dev, " Boot REG = 0x%08x\n", in_be32(dev->reg));
+
+	/* Disable all inputs by default */
+	out_be32(dev->reg, 0);
+
+	dev_info(&ofdev->dev,
+	       "RGMII %s initialized with%s MDIO support\n",
+	       ofdev->dev.of_node->full_name,
+	       (dev->flags & EMAC_RGMII_FLAG_HAS_MDIO) ? "" : "out");
+
+	wmb();
+	platform_set_drvdata(ofdev, dev);
+
+	return 0;
+
+ err_free:
+	kfree(dev);
+ err_gone:
+	return rc;
+}
+
+static int rgmii_wol_remove(struct platform_device *ofdev)
+{
+	struct rgmii_wol_instance *dev = platform_get_drvdata(ofdev);
+
+	WARN_ON(dev->users != 0);
+
+	iounmap(dev->reg);
+	kfree(dev);
+
+	return 0;
+}
+
+static struct of_device_id rgmii_wol_match[] = {
+	{
+		.compatible	= "ibm,rgmii-wol",
+	},
+	{
+		.type		= "emac-rgmii-wol",
+	},
+	{},
+};
+
+static struct platform_driver rgmii_wol_driver = {
+	.driver = {
+		.name = "emac-rgmii-wol",
+		.owner = THIS_MODULE,
+		.of_match_table = rgmii_wol_match,
+	},
+	.probe = rgmii_wol_probe,
+	.remove = rgmii_wol_remove,
+};
+
+int __init rgmii_wol_init(void)
+{
+	return platform_driver_register(&rgmii_wol_driver);
+}
+
+void rgmii_wol_exit(void)
+{
+	platform_driver_unregister(&rgmii_wol_driver);
+}
diff --git a/drivers/net/ethernet/ibm/emac/rgmii_wol.h b/drivers/net/ethernet/ibm/emac/rgmii_wol.h
new file mode 100644
index 0000000..44ce268
--- /dev/null
+++ b/drivers/net/ethernet/ibm/emac/rgmii_wol.h
@@ -0,0 +1,62 @@
+/* drivers/net/ethernet/ibm/emac/rgmii_wol.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge with
+ * wake on LAN support.
+ *
+ * Copyright 2013 Alistair Popple, IBM Corp.
+ *                <alistair@popple.id.au>
+ *
+ * Based on rgmii.h:
+ * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
+ *                <benh@kernel.crashing.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __IBM_NEWEMAC_RGMII_WOL_H
+#define __IBM_NEWEMAC_RGMII_WOL_H
+
+/* RGMII device */
+struct rgmii_wol_instance {
+	u32 __iomem			*reg;
+
+	/* RGMII bridge flags */
+	int				flags;
+#define EMAC_RGMII_FLAG_HAS_MDIO	0x00000001
+
+	/* Only one EMAC whacks us at a time */
+	struct mutex			lock;
+
+	/* number of EMACs using this RGMII bridge */
+	int				users;
+};
+
+#ifdef CONFIG_IBM_EMAC_RGMII_WOL
+
+extern int rgmii_wol_init(void);
+extern void rgmii_wol_exit(void);
+extern int rgmii_wol_attach(struct platform_device *ofdev, int mode);
+extern void rgmii_wol_detach(struct platform_device *ofdev);
+extern void rgmii_wol_get_mdio(struct platform_device *ofdev);
+extern void rgmii_wol_put_mdio(struct platform_device *ofdev);
+extern void rgmii_wol_set_speed(struct platform_device *ofdev, int speed);
+extern int rgmii_wol_get_regs_len(struct platform_device *ofdev);
+extern void *rgmii_wol_dump_regs(struct platform_device *ofdev, void *buf);
+
+#else
+
+# define rgmii_wol_init()		0
+# define rgmii_wol_exit()		do { } while (0)
+# define rgmii_wol_attach(x, y, z)	(-ENXIO)
+# define rgmii_wol_detach(x, y)	do { } while (0)
+# define rgmii_wol_get_mdio(o, i)	do { } while (0)
+# define rgmii_wol_put_mdio(o, i)	do { } while (0)
+# define rgmii_wol_set_speed(x, y, z)	do { } while (0)
+# define rgmii_wol_get_regs_len(x)	0
+# define rgmii_wol_dump_regs(x, buf)	(buf)
+#endif				/* !CONFIG_IBM_EMAC_RGMII_WOL */
+
+#endif /* __IBM_NEWEMAC_RGMII_WOL_H */
-- 
1.7.10.4

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Ben Hutchings]

On Tue, 2013-11-05 at 16:31 +1100, Alistair Popple wrote:
[...]
> --- a/drivers/net/ethernet/ibm/emac/Kconfig
> +++ b/drivers/net/ethernet/ibm/emac/Kconfig
> @@ -55,6 +55,10 @@ config IBM_EMAC_RGMII
>  	bool
>  	default n
>  
> +config IBM_EMAC_RGMII_WOL
> +	bool
> +	default n
> +
[...]

So no-one can even build-test this at present!

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Benjamin Herrenschmidt]

On Tue, 2013-11-05 at 18:16 +0000, Ben Hutchings wrote:
> On Tue, 2013-11-05 at 16:31 +1100, Alistair Popple wrote:
> [...]
> > --- a/drivers/net/ethernet/ibm/emac/Kconfig
> > +++ b/drivers/net/ethernet/ibm/emac/Kconfig
> > @@ -55,6 +55,10 @@ config IBM_EMAC_RGMII
> >  	bool
> >  	default n
> >  
> > +config IBM_EMAC_RGMII_WOL
> > +	bool
> > +	default n
> > +
> [...]
> 
> So no-one can even build-test this at present!

Patch 7/7 adds the select to the platform, isn't that sufficient ?

It's an SoC bit so there's little point making it generally
selectable by the user.

Alistair: The commit name should be different, it's not a PHY you are
adding, it's a PHY interface (the PHY itself is off chip).

Cheers,
Ben.

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Ben Hutchings]

On Wed, 2013-11-06 at 06:54 +1100, Benjamin Herrenschmidt wrote:
> On Tue, 2013-11-05 at 18:16 +0000, Ben Hutchings wrote:
> > On Tue, 2013-11-05 at 16:31 +1100, Alistair Popple wrote:
> > [...]
> > > --- a/drivers/net/ethernet/ibm/emac/Kconfig
> > > +++ b/drivers/net/ethernet/ibm/emac/Kconfig
> > > @@ -55,6 +55,10 @@ config IBM_EMAC_RGMII
> > >  	bool
> > >  	default n
> > >  
> > > +config IBM_EMAC_RGMII_WOL
> > > +	bool
> > > +	default n
> > > +
> > [...]
> > 
> > So no-one can even build-test this at present!
> 
> Patch 7/7 adds the select to the platform, isn't that sufficient ?

I suppose so, but I don't think that went to netdev.

> It's an SoC bit so there's little point making it generally
> selectable by the user.

I think a better way to do this is:

config IBM_EMAC_RGMII_WOL
	bool "IBM EMAC RGMII wake-on-LAN support"
	depends on MY_WONDERFUL_NEW_SOC || COMPILE_TEST
	default y if MY_WONDERFUL_NEW_SOC

Then anyone making an API change that affects this driver can check that
it still complies.

Ben.

> Alistair: The commit name should be different, it's not a PHY you are
> adding, it's a PHY interface (the PHY itself is off chip).


-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Alistair Popple]

On Tue, 5 Nov 2013 23:11:50 Ben Hutchings wrote:
> On Wed, 2013-11-06 at 06:54 +1100, Benjamin Herrenschmidt wrote:

[snip]

> > It's an SoC bit so there's little point making it generally
> > selectable by the user.
> 
> I think a better way to do this is:
> 
> config IBM_EMAC_RGMII_WOL
> 	bool "IBM EMAC RGMII wake-on-LAN support"
> 	depends on MY_WONDERFUL_NEW_SOC || COMPILE_TEST
> 	default y if MY_WONDERFUL_NEW_SOC
> 
> Then anyone making an API change that affects this driver can check that
> it still complies.

The method used in this patch is the same as what is currently used by the 
other IBM EMAC PHY interfaces (eg. config IBM_EMAC_ZMII etc). I'm happy to 
send a patch to update all of those as well for consistency but that would 
mean adding what each platform requires into EMACS Kconfig as well.

Personally I think it is nicer to keep the definitions of what each platform 
requires in one place (ie. arch/powerpc/platforms/44x/Kconfig) as it is 
consistent with what we do for other 44x drivers, however I am happy to use 
the above method if people think it's better.

Alternatively we could do something like this:

config IBM_EMAC_RGMII_WOL
        bool
        default y if COMPILE_TEST
        default n

This would leave the platform dependencies as they are currently but still 
allow compile testing.

Regards,

Alistair

> Ben.
> 
> > Alistair: The commit name should be different, it's not a PHY you are
> > adding, it's a PHY interface (the PHY itself is off chip).

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Ben Hutchings]

On Wed, 2013-11-06 at 12:34 +1100, Alistair Popple wrote:
> On Tue, 5 Nov 2013 23:11:50 Ben Hutchings wrote:
> > On Wed, 2013-11-06 at 06:54 +1100, Benjamin Herrenschmidt wrote:
> 
> [snip]
> 
> > > It's an SoC bit so there's little point making it generally
> > > selectable by the user.
> > 
> > I think a better way to do this is:
> > 
> > config IBM_EMAC_RGMII_WOL
> > 	bool "IBM EMAC RGMII wake-on-LAN support"
> > 	depends on MY_WONDERFUL_NEW_SOC || COMPILE_TEST
> > 	default y if MY_WONDERFUL_NEW_SOC
> > 
> > Then anyone making an API change that affects this driver can check that
> > it still complies.
> 
> The method used in this patch is the same as what is currently used by the 
> other IBM EMAC PHY interfaces (eg. config IBM_EMAC_ZMII etc). I'm happy to 
> send a patch to update all of those as well for consistency but that would 
> mean adding what each platform requires into EMACS Kconfig as well.
> 
> Personally I think it is nicer to keep the definitions of what each platform 
> requires in one place (ie. arch/powerpc/platforms/44x/Kconfig) as it is 
> consistent with what we do for other 44x drivers, however I am happy to use 
> the above method if people think it's better.

Yes, I see your point.

> Alternatively we could do something like this:
> 
> config IBM_EMAC_RGMII_WOL
>         bool
>         default y if COMPILE_TEST
>         default n
> 
> This would leave the platform dependencies as they are currently but still 
> allow compile testing.

It still shouldn't default to y in that case.  Instead you can make the
symbol conditionally configurable:

config IBM_EMAC_RGMII_WOL
	bool "IBM EMAC RGMII wake-on-LAN support" if COMPILE_TEST

and then select this from your platform Kconfig as you intended.

(There is no need to put 'default n' as that's implicit for a
configurable symbol.  But it doesn't hurt either.)

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Alistair Popple]

On Wed, 6 Nov 2013 16:40:10 Ben Hutchings wrote:
> On Wed, 2013-11-06 at 12:34 +1100, Alistair Popple wrote:
> > On Tue, 5 Nov 2013 23:11:50 Ben Hutchings wrote:
> > > On Wed, 2013-11-06 at 06:54 +1100, Benjamin Herrenschmidt wrote:
> > [snip]
> > 
> > > > It's an SoC bit so there's little point making it generally
> > > > selectable by the user.
> > > 
> > > I think a better way to do this is:
> > > 
> > > config IBM_EMAC_RGMII_WOL
> > > 
> > > 	bool "IBM EMAC RGMII wake-on-LAN support"
> > > 	depends on MY_WONDERFUL_NEW_SOC || COMPILE_TEST
> > > 	default y if MY_WONDERFUL_NEW_SOC
> > > 
> > > Then anyone making an API change that affects this driver can check that
> > > it still complies.
> > 
> > The method used in this patch is the same as what is currently used by the
> > other IBM EMAC PHY interfaces (eg. config IBM_EMAC_ZMII etc). I'm happy to
> > send a patch to update all of those as well for consistency but that would
> > mean adding what each platform requires into EMACS Kconfig as well.
> > 
> > Personally I think it is nicer to keep the definitions of what each
> > platform requires in one place (ie. arch/powerpc/platforms/44x/Kconfig)
> > as it is consistent with what we do for other 44x drivers, however I am
> > happy to use the above method if people think it's better.
> 
> Yes, I see your point.
> 
> > Alternatively we could do something like this:
> > 
> > config IBM_EMAC_RGMII_WOL
> > 
> >         bool
> >         default y if COMPILE_TEST
> >         default n
> > 
> > This would leave the platform dependencies as they are currently but still
> > allow compile testing.
> 
> It still shouldn't default to y in that case.  Instead you can make the
> symbol conditionally configurable:
> 
> config IBM_EMAC_RGMII_WOL
> 	bool "IBM EMAC RGMII wake-on-LAN support" if COMPILE_TEST
> 
> and then select this from your platform Kconfig as you intended.

That looks reasonable - I will include it in the next version of the patch 
series. Thanks.

> (There is no need to put 'default n' as that's implicit for a
> configurable symbol.  But it doesn't hurt either.)
> 
> Ben.

Alistair

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Florian Fainelli]

[snip]

> +/* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */
> +static inline int rgmii_valid_mode(int phy_mode)
> +{
> +       return  phy_mode == PHY_MODE_GMII ||
> +               phy_mode == PHY_MODE_MII ||
> +               phy_mode == PHY_MODE_RGMII ||
> +               phy_mode == PHY_MODE_TBI ||
> +               phy_mode == PHY_MODE_RTBI;
> +}
> +
> +static inline const char *rgmii_mode_name(int mode)
> +{
> +       switch (mode) {
> +       case PHY_MODE_RGMII:
> +               return "RGMII";
> +       case PHY_MODE_TBI:
> +               return "TBI";
> +       case PHY_MODE_GMII:
> +               return "GMII";
> +       case PHY_MODE_MII:
> +               return "MII";
> +       case PHY_MODE_RTBI:
> +               return "RTBI";
> +       default:
> +               BUG();
> +       }

Any reasons why you are duplicating what is available in
drivers/of/of_net.c ::of_get_phy_mode()?
-- 
Florian

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Alistair Popple]

On Tue, 5 Nov 2013 10:47:22 Florian Fainelli wrote:
> [snip]
> 
> > +/* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */
> > +static inline int rgmii_valid_mode(int phy_mode)
> > +{
> > +       return  phy_mode == PHY_MODE_GMII ||
> > +               phy_mode == PHY_MODE_MII ||
> > +               phy_mode == PHY_MODE_RGMII ||
> > +               phy_mode == PHY_MODE_TBI ||
> > +               phy_mode == PHY_MODE_RTBI;
> > +}
> > +
> > +static inline const char *rgmii_mode_name(int mode)
> > +{
> > +       switch (mode) {
> > +       case PHY_MODE_RGMII:
> > +               return "RGMII";
> > +       case PHY_MODE_TBI:
> > +               return "TBI";
> > +       case PHY_MODE_GMII:
> > +               return "GMII";
> > +       case PHY_MODE_MII:
> > +               return "MII";
> > +       case PHY_MODE_RTBI:
> > +               return "RTBI";
> > +       default:
> > +               BUG();
> > +       }
> 
> Any reasons why you are duplicating what is available in
> drivers/of/of_net.c ::of_get_phy_mode()?

Unless I'm missing something of_get_phy_mode() is going the other way. 
rgmii_mode_name() is converting PHY_MODE_* into a human-readable string. I 
couldn't find any obvious kernel method to do this but maybe I missed it?

Regards,

Alistair

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Florian Fainelli]

2013/11/5 Alistair Popple <alistair@popple.id.au>:
> On Tue, 5 Nov 2013 10:47:22 Florian Fainelli wrote:
>> [snip]
>>
>> > +/* RGMII bridge supports only GMII/TBI and RGMII/RTBI PHYs */
>> > +static inline int rgmii_valid_mode(int phy_mode)
>> > +{
>> > +       return  phy_mode == PHY_MODE_GMII ||
>> > +               phy_mode == PHY_MODE_MII ||
>> > +               phy_mode == PHY_MODE_RGMII ||
>> > +               phy_mode == PHY_MODE_TBI ||
>> > +               phy_mode == PHY_MODE_RTBI;
>> > +}
>> > +
>> > +static inline const char *rgmii_mode_name(int mode)
>> > +{
>> > +       switch (mode) {
>> > +       case PHY_MODE_RGMII:
>> > +               return "RGMII";
>> > +       case PHY_MODE_TBI:
>> > +               return "TBI";
>> > +       case PHY_MODE_GMII:
>> > +               return "GMII";
>> > +       case PHY_MODE_MII:
>> > +               return "MII";
>> > +       case PHY_MODE_RTBI:
>> > +               return "RTBI";
>> > +       default:
>> > +               BUG();
>> > +       }
>>
>> Any reasons why you are duplicating what is available in
>> drivers/of/of_net.c ::of_get_phy_mode()?
>
> Unless I'm missing something of_get_phy_mode() is going the other way.
> rgmii_mode_name() is converting PHY_MODE_* into a human-readable string. I
> couldn't find any obvious kernel method to do this but maybe I missed it?

Right, rgmii_mode_name() just has informative purposes and should be
removed, I would suggest using standard device tree bindings property
(phy-mode) anyway such that you could use of_get_phy_mode() and use
phy_interface_t types.
-- 
Florian

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Alistair Popple]

On Tue, 5 Nov 2013 16:16:08 Florian Fainelli wrote:

[snip]

> 2013/11/5 Alistair Popple <alistair@popple.id.au>:
> >> Any reasons why you are duplicating what is available in
> >> drivers/of/of_net.c ::of_get_phy_mode()?
> > 
> > Unless I'm missing something of_get_phy_mode() is going the other way.
> > rgmii_mode_name() is converting PHY_MODE_* into a human-readable string. I
> > couldn't find any obvious kernel method to do this but maybe I missed it?
> 
> Right, rgmii_mode_name() just has informative purposes and should be
> removed, I would suggest using standard device tree bindings property
> (phy-mode) anyway such that you could use of_get_phy_mode() and use
> phy_interface_t types.

Ok, that's what is currently done in the core IBM EMAC driver. As this is used 
just for informative purposes I will remove it. Thanks.

Regards,

Alistair

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Benjamin Herrenschmidt]

On Wed, 2013-11-06 at 12:38 +1100, Alistair Popple wrote:
> > Right, rgmii_mode_name() just has informative purposes and should be
> > removed, I would suggest using standard device tree bindings
> property
> > (phy-mode) anyway such that you could use of_get_phy_mode() and use
> > phy_interface_t types.
> 
> Ok, that's what is currently done in the core IBM EMAC driver. As this
> is used 
> just for informative purposes I will remove it. Thanks.

Why ? Information is useful...

Ben.

Re: [PATCH 3/7] IBM Akebono: Add support for a new PHY to the IBM emac driver

[Florian Fainelli]

2013/11/5 Benjamin Herrenschmidt <benh@kernel.crashing.org>:
> On Wed, 2013-11-06 at 12:38 +1100, Alistair Popple wrote:
>> > Right, rgmii_mode_name() just has informative purposes and should be
>> > removed, I would suggest using standard device tree bindings
>> property
>> > (phy-mode) anyway such that you could use of_get_phy_mode() and use
>> > phy_interface_t types.
>>
>> Ok, that's what is currently done in the core IBM EMAC driver. As this
>> is used
>> just for informative purposes I will remove it. Thanks.
>
> Why ? Information is useful...

Not the way they are currently handled:

+       /* Check if we need to attach to a RGMII */
+       if (!rgmii_valid_mode(mode)) {
+               dev_err(&ofdev->dev, "unsupported settings !\n");

Considering that nothing useful is being printed, that or nothing at
all really looks identical to me.
--
Florian

[PATCH 4/7] IBM Akebono: Add support to the OHCI platform driver for Akebono

[Alistair Popple]

The IBM Akebono board has a OHCI compliant USB host interface. This
patch adds support for it to the OHCI platform driver.

As we use device tree to pass platform specific data instead of
platform data we remove the check for platform data and instead
provide reasonable defaults if no platform data is present. This is
similar to what is currently done in ehci-platform.c.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org
---
 drivers/usb/host/ohci-platform.c |   20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
index a4c6410..4331454 100644
--- a/drivers/usb/host/ohci-platform.c
+++ b/drivers/usb/host/ohci-platform.c
@@ -23,6 +23,8 @@
 #include <linux/usb/ohci_pdriver.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
+#include <linux/slab.h>
+#include <linux/of.h>
 
 #include "ohci.h"
 
@@ -55,6 +57,8 @@ static const struct ohci_driver_overrides platform_overrides __initconst = {
 	.reset =	ohci_platform_reset,
 };
 
+static struct usb_ohci_pdata ohci_platform_defaults;
+
 static int ohci_platform_probe(struct platform_device *dev)
 {
 	struct usb_hcd *hcd;
@@ -63,14 +67,14 @@ static int ohci_platform_probe(struct platform_device *dev)
 	int irq;
 	int err = -ENOMEM;
 
-	if (!pdata) {
-		WARN_ON(1);
-		return -ENODEV;
-	}
-
 	if (usb_disabled())
 		return -ENODEV;
 
+	/* Platforms using DT don't always provide platform data.
+	 * This should provide reasonable defaults. */
+	if (!pdata)
+		dev->dev.platform_data = pdata = &ohci_platform_defaults;
+
 	irq = platform_get_irq(dev, 0);
 	if (irq < 0) {
 		dev_err(&dev->dev, "no irq provided");
@@ -171,6 +175,11 @@ static int ohci_platform_resume(struct device *dev)
 #define ohci_platform_resume	NULL
 #endif /* CONFIG_PM */
 
+static const struct of_device_id ohci_of_match[] = {
+	{ .compatible = "ibm,akebono-ohci", },
+	{},
+};
+
 static const struct platform_device_id ohci_platform_table[] = {
 	{ "ohci-platform", 0 },
 	{ }
@@ -191,6 +200,7 @@ static struct platform_driver ohci_platform_driver = {
 		.owner	= THIS_MODULE,
 		.name	= "ohci-platform",
 		.pm	= &ohci_platform_pm_ops,
+		.of_match_table = ohci_of_match,
 	}
 };
 
-- 
1.7.10.4

Re: [PATCH 4/7] IBM Akebono: Add support to the OHCI platform driver for Akebono

[Alan Stern]

On Tue, 5 Nov 2013, Alistair Popple wrote:

> The IBM Akebono board has a OHCI compliant USB host interface. This
> patch adds support for it to the OHCI platform driver.
> 
> As we use device tree to pass platform specific data instead of
> platform data we remove the check for platform data and instead
> provide reasonable defaults if no platform data is present. This is
> similar to what is currently done in ehci-platform.c.
> 
> Signed-off-by: Alistair Popple <alistair@popple.id.au>
> Cc: Alan Stern <stern@rowland.harvard.edu>
> Cc: linux-usb@vger.kernel.org
> ---
>  drivers/usb/host/ohci-platform.c |   20 +++++++++++++++-----
>  1 file changed, 15 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
> index a4c6410..4331454 100644
> --- a/drivers/usb/host/ohci-platform.c
> +++ b/drivers/usb/host/ohci-platform.c
> @@ -23,6 +23,8 @@
>  #include <linux/usb/ohci_pdriver.h>
>  #include <linux/usb.h>
>  #include <linux/usb/hcd.h>
> +#include <linux/slab.h>
> +#include <linux/of.h>
>  
>  #include "ohci.h"
>  
> @@ -55,6 +57,8 @@ static const struct ohci_driver_overrides platform_overrides __initconst = {
>  	.reset =	ohci_platform_reset,
>  };
>  
> +static struct usb_ohci_pdata ohci_platform_defaults;
> +
>  static int ohci_platform_probe(struct platform_device *dev)
>  {
>  	struct usb_hcd *hcd;
> @@ -63,14 +67,14 @@ static int ohci_platform_probe(struct platform_device *dev)
>  	int irq;
>  	int err = -ENOMEM;
>  
> -	if (!pdata) {
> -		WARN_ON(1);
> -		return -ENODEV;
> -	}
> -
>  	if (usb_disabled())
>  		return -ENODEV;
>  
> +	/* Platforms using DT don't always provide platform data.
> +	 * This should provide reasonable defaults. */

	/*
	 * The accepted format for multi-line
	 * comments is like this.
	 */

> +	if (!pdata)
> +		dev->dev.platform_data = pdata = &ohci_platform_defaults;
> +
>  	irq = platform_get_irq(dev, 0);
>  	if (irq < 0) {
>  		dev_err(&dev->dev, "no irq provided");
> @@ -171,6 +175,11 @@ static int ohci_platform_resume(struct device *dev)
>  #define ohci_platform_resume	NULL
>  #endif /* CONFIG_PM */
>  
> +static const struct of_device_id ohci_of_match[] = {
> +	{ .compatible = "ibm,akebono-ohci", },
> +	{},
> +};
> +
>  static const struct platform_device_id ohci_platform_table[] = {
>  	{ "ohci-platform", 0 },
>  	{ }
> @@ -191,6 +200,7 @@ static struct platform_driver ohci_platform_driver = {
>  		.owner	= THIS_MODULE,
>  		.name	= "ohci-platform",
>  		.pm	= &ohci_platform_pm_ops,
> +		.of_match_table = ohci_of_match,
>  	}
>  };

Update the comment formatting, and then you can resubmit with

Acked-by: Alan Stern <stern@rowland.harvard.edu>

Re: [PATCH 4/7] IBM Akebono: Add support to the OHCI platform driver for Akebono

[Alistair Popple]

On Tue, 5 Nov 2013 10:04:02 Alan Stern wrote:

[snip]

> > 
> > +	/* Platforms using DT don't always provide platform data.
> > +	 * This should provide reasonable defaults. */
> 
> 	/*
> 	 * The accepted format for multi-line
> 	 * comments is like this.
> 	 */
> 

Ok, I'll fix that for the next revision.

> > +	if (!pdata)
> > +		dev->dev.platform_data = pdata = &ohci_platform_defaults;
> > +
> > 
> >  	irq = platform_get_irq(dev, 0);
> >  	if (irq < 0) {
> >  	
> >  		dev_err(&dev->dev, "no irq provided");
> > 
> > @@ -171,6 +175,11 @@ static int ohci_platform_resume(struct device *dev)
> > 
> >  #define ohci_platform_resume	NULL
> >  #endif /* CONFIG_PM */
> > 
> > +static const struct of_device_id ohci_of_match[] = {
> > +	{ .compatible = "ibm,akebono-ohci", },
> > +	{},
> > +};
> > +
> > 
> >  static const struct platform_device_id ohci_platform_table[] = {
> >  
> >  	{ "ohci-platform", 0 },
> >  	{ }
> > 
> > @@ -191,6 +200,7 @@ static struct platform_driver ohci_platform_driver = {
> > 
> >  		.owner	= THIS_MODULE,
> >  		.name	= "ohci-platform",
> >  		.pm	= &ohci_platform_pm_ops,
> > 
> > +		.of_match_table = ohci_of_match,
> > 
> >  	}
> >  
> >  };
> 
> Update the comment formatting, and then you can resubmit with
> 
> Acked-by: Alan Stern <stern@rowland.harvard.edu>

Thanks. Based on the discussion for the EHCI driver I would like to change the 
compatibility string to "usb-ochi" (instead of "ibm,akebono-ohci"). Are you 
still happy for me to add the Acked-by with the alternate compatibility (and 
of course the formatting fix)? No other drivers currently use "usb-ochi" so it 
shouldn't require any merging of drivers.

Regards,

Alistair

Re: [PATCH 4/7] IBM Akebono: Add support to the OHCI platform driver for Akebono

[Benjamin Herrenschmidt]

On Thu, 2013-11-07 at 14:34 +1100, Alistair Popple wrote:
> Thanks. Based on the discussion for the EHCI driver I would like to change the 
> compatibility string to "usb-ochi" (instead of "ibm,akebono-ohci"). Are you 
> still happy for me to add the Acked-by with the alternate compatibility (and 
> of course the formatting fix)? No other drivers currently use "usb-ochi" so it 
> shouldn't require any merging of drivers.

	s/ochi/ohci/ :-)

Cheers,
Ben.

Re: [PATCH 4/7] IBM Akebono: Add support to the OHCI platform driver for Akebono

[Alan Stern]

On Thu, 7 Nov 2013, Alistair Popple wrote:

> Thanks. Based on the discussion for the EHCI driver I would like to change the 
> compatibility string to "usb-ochi" (instead of "ibm,akebono-ohci"). Are you 
> still happy for me to add the Acked-by with the alternate compatibility (and 
> of course the formatting fix)? No other drivers currently use "usb-ochi" so it 
> shouldn't require any merging of drivers.

Yes, go ahead (as long as you use the right spelling, as Ben pointed 
out).

Alan Stern

[PATCH 5/7] IBM Akebono: Add support to the EHCI platform driver for Akebono

[Alistair Popple]

The IBM Akebono board has an EHCI compliant USB host interface. This
patch adds support for it to the EHCI platform driver.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org
---
 drivers/usb/host/ehci-platform.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index f6b790c..0a67616 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -203,9 +203,10 @@ static int ehci_platform_resume(struct device *dev)
 #define ehci_platform_resume	NULL
 #endif /* CONFIG_PM */
 
-static const struct of_device_id vt8500_ehci_ids[] = {
+static const struct of_device_id ehci_platform_ids[] = {
 	{ .compatible = "via,vt8500-ehci", },
 	{ .compatible = "wm,prizm-ehci", },
+	{ .compatible = "ibm,akebono-ehci", },
 	{}
 };
 
@@ -229,7 +230,7 @@ static struct platform_driver ehci_platform_driver = {
 		.owner	= THIS_MODULE,
 		.name	= "ehci-platform",
 		.pm	= &ehci_platform_pm_ops,
-		.of_match_table = vt8500_ehci_ids,
+		.of_match_table = ehci_platform_ids,
 	}
 };
 
-- 
1.7.10.4

Re: [PATCH 5/7] IBM Akebono: Add support to the EHCI platform driver for Akebono

[Alan Stern]

On Tue, 5 Nov 2013, Alistair Popple wrote:

> The IBM Akebono board has an EHCI compliant USB host interface. This
> patch adds support for it to the EHCI platform driver.
> 
> Signed-off-by: Alistair Popple <alistair@popple.id.au>
> Cc: Alan Stern <stern@rowland.harvard.edu>
> Cc: linux-usb@vger.kernel.org
> ---
>  drivers/usb/host/ehci-platform.c |    5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> index f6b790c..0a67616 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -203,9 +203,10 @@ static int ehci_platform_resume(struct device *dev)
>  #define ehci_platform_resume	NULL
>  #endif /* CONFIG_PM */
>  
> -static const struct of_device_id vt8500_ehci_ids[] = {
> +static const struct of_device_id ehci_platform_ids[] = {
>  	{ .compatible = "via,vt8500-ehci", },
>  	{ .compatible = "wm,prizm-ehci", },
> +	{ .compatible = "ibm,akebono-ehci", },
>  	{}
>  };
>  
> @@ -229,7 +230,7 @@ static struct platform_driver ehci_platform_driver = {
>  		.owner	= THIS_MODULE,
>  		.name	= "ehci-platform",
>  		.pm	= &ehci_platform_pm_ops,
> -		.of_match_table = vt8500_ehci_ids,
> +		.of_match_table = ehci_platform_ids,
>  	}
>  };

Acked-by: Alan Stern <stern@rowland.harvard.edu>

Re: [PATCH 5/7] IBM Akebono: Add support to the EHCI platform driver for Akebono

[Benjamin Herrenschmidt]

On Tue, 2013-11-05 at 10:04 -0500, Alan Stern wrote:
> On Tue, 5 Nov 2013, Alistair Popple wrote:
> 
> > The IBM Akebono board has an EHCI compliant USB host interface. This
> > patch adds support for it to the EHCI platform driver.
> > 
> > Signed-off-by: Alistair Popple <alistair@popple.id.au>
> > Cc: Alan Stern <stern@rowland.harvard.edu>
> > Cc: linux-usb@vger.kernel.org
> > ---
> >  drivers/usb/host/ehci-platform.c |    5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> > index f6b790c..0a67616 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -203,9 +203,10 @@ static int ehci_platform_resume(struct device *dev)
> >  #define ehci_platform_resume	NULL
> >  #endif /* CONFIG_PM */
> >  
> > -static const struct of_device_id vt8500_ehci_ids[] = {
> > +static const struct of_device_id ehci_platform_ids[] = {
> >  	{ .compatible = "via,vt8500-ehci", },
> >  	{ .compatible = "wm,prizm-ehci", },
> > +	{ .compatible = "ibm,akebono-ehci", },
> >  	{}
> >  };

Why ? Do we need to add an entry for every platform in there ? Besides,
it probably should be the SoC name not the platform here....

Why not simply a generic compatible "usb-ehci" ? It's a standard
programming interface, there are no specific quirks, we shouldn't
need to have to add new entries to the driver like that for every
new SoC/platform.

> > @@ -229,7 +230,7 @@ static struct platform_driver ehci_platform_driver = {
> >  		.owner	= THIS_MODULE,
> >  		.name	= "ehci-platform",
> >  		.pm	= &ehci_platform_pm_ops,
> > -		.of_match_table = vt8500_ehci_ids,
> > +		.of_match_table = ehci_platform_ids,
> >  	}
> >  };
> 
> Acked-by: Alan Stern <stern@rowland.harvard.edu>
> 
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev

Re: [PATCH 5/7] IBM Akebono: Add support to the EHCI platform driver for Akebono

[Alistair Popple]

On Wed, 6 Nov 2013 06:52:13 Benjamin Herrenschmidt wrote:

[snip]

> 
> Why ? Do we need to add an entry for every platform in there ? Besides,
> it probably should be the SoC name not the platform here....
> 
> Why not simply a generic compatible "usb-ehci" ? It's a standard
> programming interface, there are no specific quirks, we shouldn't
> need to have to add new entries to the driver like that for every
> new SoC/platform.
> 

Actually a grep of "usb-ehci" turns up the ehci-ppc-of driver which I somehow 
missed. This driver works and uses .compatible = "usb-ehci" so I can use that 
instead if that is preferable?

However it is basically the same as the ehci-platform driver so I guess at 
some point the two should be merged...

> > > @@ -229,7 +230,7 @@ static struct platform_driver ehci_platform_driver =
> > > {
> > > 
> > >  		.owner	= THIS_MODULE,
> > >  		.name	= "ehci-platform",
> > >  		.pm	= &ehci_platform_pm_ops,
> > > 
> > > -		.of_match_table = vt8500_ehci_ids,
> > > +		.of_match_table = ehci_platform_ids,
> > > 
> > >  	}
> > >  
> > >  };
> > 
> > Acked-by: Alan Stern <stern@rowland.harvard.edu>
> > 
> > _______________________________________________
> > Linuxppc-dev mailing list
> > Linuxppc-dev@lists.ozlabs.org
> > https://lists.ozlabs.org/listinfo/linuxppc-dev

Re: [PATCH 5/7] IBM Akebono: Add support to the EHCI platform driver for Akebono

[Benjamin Herrenschmidt]

On Wed, 2013-11-06 at 14:50 +1100, Alistair Popple wrote:
> Actually a grep of "usb-ehci" turns up the ehci-ppc-of driver which I somehow 
> missed. This driver works and uses .compatible = "usb-ehci" so I can use that 
> instead if that is preferable?
> 
> However it is basically the same as the ehci-platform driver so I guess at 
> some point the two should be merged...

I think the split predates the grand unification of "of" driver and platform,
so yes they should.

Cheers,
Ben.

[RFC PATCH] ehci-platform: Merge ppc-of EHCI driver into the ehci-platform driver

[Alistair Popple]

Currently the ppc-of driver uses the compatibility string
"usb-ehci". This means platforms that use device-tree and implement an
EHCI compatible interface have to either use the ppc-of driver or add
a compatible line to the ehci-platform driver. It would be more
appropriate for the platform driver to be compatible with "usb-ehci"
as non-powerpc platforms are also beginning to utilise device-tree.

This patch merges the device tree property parsing from ehci-ppc-of
into the platform driver and adds a "usb-ehci" compatibility
string. The existing ehci-ppc-of driver is renamed to ehci-440epx as
it contains platform specific work arounds for the 440EPX SoC.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
---

So I could submit something like this that essentially merges the ppc-of 
driver into the platform driver instead of adding the "ibm,akebono-ehci" 
compatible line to the platform driver.

However I'm still fairly new to device-tree so I'm not sure what (if any) the 
broader impact would be. A quick grep for "usb-ehci" turned up a couple of ARM 
device tree's using it however they all provided their own drivers and don't 
select CONFIG_USB_EHCI_HCD_PLATFORM so I'm guess they shouldn't be impacted.

I have attempted to fix up any PowerPC device trees/configs, although I wasn't 
sure if "usb-ehci" should remain in sequoia.dts or not given that it needs to 
use the 440EPX specific driver.

Also this hasn't been tested (beyond compilation) yet.

 arch/powerpc/boot/dts/sequoia.dts              |    2 +-
 arch/powerpc/configs/44x/canyonlands_defconfig |    1 +
 drivers/usb/host/Kconfig                       |    8 +-
 drivers/usb/host/ehci-440epx.c                 |  236 
++++++++++++++++++++++++
 drivers/usb/host/ehci-hcd.c                    |    6 +-
 drivers/usb/host/ehci-platform.c               |   18 +-
 drivers/usb/host/ehci-ppc-of.c                 |  236 
------------------------
 7 files changed, 261 insertions(+), 246 deletions(-)
 create mode 100644 drivers/usb/host/ehci-440epx.c
 delete mode 100644 drivers/usb/host/ehci-ppc-of.c

diff --git a/arch/powerpc/boot/dts/sequoia.dts 
b/arch/powerpc/boot/dts/sequoia.dts
index b1d3292..e28371e 100644
--- a/arch/powerpc/boot/dts/sequoia.dts
+++ b/arch/powerpc/boot/dts/sequoia.dts
@@ -153,7 +153,7 @@
 		};
 
 		USB0: ehci@e0000300 {
-			compatible = "ibm,usb-ehci-440epx", "usb-ehci";
+			compatible = "ibm,usb-ehci-440epx";
 			interrupt-parent = <&UIC0>;
 			interrupts = <0x1a 0x4>;
 			reg = <0x00000000 0xe0000300 0x00000090 0x00000000 
0xe0000390 0x00000070>;
diff --git a/arch/powerpc/configs/44x/canyonlands_defconfig 
b/arch/powerpc/configs/44x/canyonlands_defconfig
index d5be93e..16dc37f 100644
--- a/arch/powerpc/configs/44x/canyonlands_defconfig
+++ b/arch/powerpc/configs/44x/canyonlands_defconfig
@@ -75,6 +75,7 @@ CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
 CONFIG_USB_DEVICEFS=y
 CONFIG_USB_MON=y
 CONFIG_USB_EHCI_HCD=m
+CONFIG_USB_EHCI_HCD_PLATFORM=m
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_HCD_PPC_OF_BE=y
 CONFIG_USB_OHCI_HCD_PPC_OF_LE=y
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index b3f20d7..b8d7c24 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -188,13 +188,13 @@ config USB_EHCI_TEGRA
          This driver enables support for the internal USB Host Controllers
          found in NVIDIA Tegra SoCs. The controllers are EHCI compliant.
 
-config USB_EHCI_HCD_PPC_OF
-	bool "EHCI support for PPC USB controller on OF platform bus"
-	depends on PPC_OF
+config USB_EHCI_HCD_440EPX
+	bool "EHCI support for PPC USB controller on 440EPX"
+	depends on PPC_OF && 440EPX
 	default y
 	---help---
 	  Enables support for the USB controller present on the PowerPC
-	  OpenFirmware platform bus.
+	  440EPX SoC.
 
 config USB_EHCI_SH
 	bool "EHCI support for SuperH USB controller"
diff --git a/drivers/usb/host/ehci-440epx.c b/drivers/usb/host/ehci-440epx.c
new file mode 100644
index 0000000..4223700
--- /dev/null
+++ b/drivers/usb/host/ehci-440epx.c
@@ -0,0 +1,236 @@
+/*
+ * EHCI HCD (Host Controller Driver) for USB.
+ *
+ * Bus Glue for PPC On-Chip EHCI driver on the of_platform bus
+ * Tested on AMCC PPC 440EPx
+ *
+ * Valentine Barshak <vbarshak@ru.mvista.com>
+ *
+ * Based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
+ * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <linux/err.h>
+#include <linux/signal.h>
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+
+static const struct hc_driver ehci_440epx_hc_driver = {
+	.description		= hcd_name,
+	.product_desc		= "OF EHCI",
+	.hcd_priv_size		= sizeof(struct ehci_hcd),
+
+	/*
+	 * generic hardware linkage
+	 */
+	.irq			= ehci_irq,
+	.flags			= HCD_MEMORY | HCD_USB2,
+
+	/*
+	 * basic lifecycle operations
+	 */
+	.reset			= ehci_setup,
+	.start			= ehci_run,
+	.stop			= ehci_stop,
+	.shutdown		= ehci_shutdown,
+
+	/*
+	 * managing i/o requests and associated device resources
+	 */
+	.urb_enqueue		= ehci_urb_enqueue,
+	.urb_dequeue		= ehci_urb_dequeue,
+	.endpoint_disable	= ehci_endpoint_disable,
+	.endpoint_reset		= ehci_endpoint_reset,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number	= ehci_get_frame,
+
+	/*
+	 * root hub support
+	 */
+	.hub_status_data	= ehci_hub_status_data,
+	.hub_control		= ehci_hub_control,
+#ifdef	CONFIG_PM
+	.bus_suspend		= ehci_bus_suspend,
+	.bus_resume		= ehci_bus_resume,
+#endif
+	.relinquish_port	= ehci_relinquish_port,
+	.port_handed_over	= ehci_port_handed_over,
+
+	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
+};
+
+
+/*
+ * 440EPx Errata USBH_3
+ * Fix: Enable Break Memory Transfer (BMT) in INSNREG3
+ */
+#define PPC440EPX_EHCI0_INSREG_BMT	(0x1 << 0)
+static int
+ppc44x_enable_bmt(struct device_node *dn)
+{
+	__iomem u32 *insreg_virt;
+
+	insreg_virt = of_iomap(dn, 1);
+	if (!insreg_virt)
+		return  -EINVAL;
+
+	out_be32(insreg_virt + 3, PPC440EPX_EHCI0_INSREG_BMT);
+
+	iounmap(insreg_virt);
+	return 0;
+}
+
+
+static int ehci_hcd_440epx_probe(struct platform_device *op)
+{
+	struct device_node *dn = op->dev.of_node;
+	struct usb_hcd *hcd;
+	struct ehci_hcd	*ehci = NULL;
+	struct resource res;
+	int irq;
+	int rv;
+
+	struct device_node *np;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
+
+	rv = of_address_to_resource(dn, 0, &res);
+	if (rv)
+		return rv;
+
+	hcd = usb_create_hcd(&ehci_440epx_hc_driver, &op->dev, "PPC-OF USB");
+	if (!hcd)
+		return -ENOMEM;
+
+	hcd->rsrc_start = res.start;
+	hcd->rsrc_len = resource_size(&res);
+
+	irq = irq_of_parse_and_map(dn, 0);
+	if (irq == NO_IRQ) {
+		printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
+		rv = -EBUSY;
+		goto err_irq;
+	}
+
+	hcd->regs = devm_ioremap_resource(&op->dev, &res);
+	if (IS_ERR(hcd->regs)) {
+		rv = PTR_ERR(hcd->regs);
+		goto err_ioremap;
+	}
+
+	ehci = hcd_to_ehci(hcd);
+	np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
+	if (np != NULL) {
+		/* claim we really affected by usb23 erratum */
+		if (!of_address_to_resource(np, 0, &res))
+			ehci->ohci_hcctrl_reg =
+				devm_ioremap(&op->dev,
+					     res.start + OHCI_HCCTRL_OFFSET,
+					     OHCI_HCCTRL_LEN);
+		else
+			pr_debug("%s: no ohci offset in fdt\n", __FILE__);
+		if (!ehci->ohci_hcctrl_reg) {
+			pr_debug("%s: ioremap for ohci hcctrl failed\n", __FILE__);
+		} else {
+			ehci->has_amcc_usb23 = 1;
+		}
+	}
+
+	if (of_get_property(dn, "big-endian", NULL)) {
+		ehci->big_endian_mmio = 1;
+		ehci->big_endian_desc = 1;
+	}
+	if (of_get_property(dn, "big-endian-regs", NULL))
+		ehci->big_endian_mmio = 1;
+	if (of_get_property(dn, "big-endian-desc", NULL))
+		ehci->big_endian_desc = 1;
+
+	ehci->caps = hcd->regs;
+
+	if (of_device_is_compatible(dn, "ibm,usb-ehci-440epx")) {
+		rv = ppc44x_enable_bmt(dn);
+		ehci_dbg(ehci, "Break Memory Transfer (BMT) is %senabled!\n",
+				rv ? "NOT ": "");
+	}
+
+	rv = usb_add_hcd(hcd, irq, 0);
+	if (rv)
+		goto err_ioremap;
+
+	return 0;
+
+err_ioremap:
+	irq_dispose_mapping(irq);
+err_irq:
+	usb_put_hcd(hcd);
+
+	return rv;
+}
+
+
+static int ehci_hcd_440epx_remove(struct platform_device *op)
+{
+	struct usb_hcd *hcd = platform_get_drvdata(op);
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+	struct device_node *np;
+	struct resource res;
+
+	dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
+
+	usb_remove_hcd(hcd);
+
+	irq_dispose_mapping(hcd->irq);
+
+	/* use request_mem_region to test if the ohci driver is loaded.  if so
+	 * ensure the ohci core is operational.
+	 */
+	if (ehci->has_amcc_usb23) {
+		np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
+		if (np != NULL) {
+			if (!of_address_to_resource(np, 0, &res))
+				if (!request_mem_region(res.start,
+							    0x4, hcd_name))
+					set_ohci_hcfs(ehci, 1);
+				else
+					release_mem_region(res.start, 0x4);
+			else
+				pr_debug("%s: no ohci offset in fdt\n", __FILE__);
+			of_node_put(np);
+		}
+	}
+	usb_put_hcd(hcd);
+
+	return 0;
+}
+
+
+static const struct of_device_id ehci_hcd_440epx_match[] = {
+	{
+		.compatible = "ibm,usb-ehci-440epx",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, ehci_hcd_440epx_match);
+
+
+static struct platform_driver ehci_hcd_440epx_driver = {
+	.probe		= ehci_hcd_440epx_probe,
+	.remove		= ehci_hcd_440epx_remove,
+	.shutdown	= usb_hcd_platform_shutdown,
+	.driver = {
+		.name = "ppc-of-ehci",
+		.owner = THIS_MODULE,
+		.of_match_table = ehci_hcd_440epx_match,
+	},
+};
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 86ab9fd..3b04f25 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1228,9 +1228,9 @@ MODULE_LICENSE ("GPL");
 #define	PS3_SYSTEM_BUS_DRIVER	ps3_ehci_driver
 #endif
 
-#ifdef CONFIG_USB_EHCI_HCD_PPC_OF
-#include "ehci-ppc-of.c"
-#define OF_PLATFORM_DRIVER	ehci_hcd_ppc_of_driver
+#ifdef CONFIG_USB_EHCI_HCD_440EPX
+#include "ehci-440epx.c"
+#define OF_PLATFORM_DRIVER	ehci_hcd_440epx_driver
 #endif
 
 #ifdef CONFIG_XPS_USB_HCD_XILINX
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-
platform.c
index f6b790c..027f368 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -77,6 +77,7 @@ static int ehci_platform_probe(struct platform_device *dev)
 	struct usb_hcd *hcd;
 	struct resource *res_mem;
 	struct usb_ehci_pdata *pdata;
+	struct device_node *dn = dev->dev.of_node;
 	int irq;
 	int err = -ENOMEM;
 
@@ -96,6 +97,18 @@ static int ehci_platform_probe(struct platform_device *dev)
 
 	pdata = dev_get_platdata(&dev->dev);
 
+	/* Initialise platform data from device tree if available. */
+	if (!dn) {
+		if (of_get_property(dn, "big-endian", NULL)) {
+			pdata->big_endian_mmio = 1;
+			pdata->big_endian_desc = 1;
+		}
+		if (of_get_property(dn, "big-endian-regs", NULL))
+			pdata->big_endian_mmio = 1;
+		if (of_get_property(dn, "big-endian-desc", NULL))
+			pdata->big_endian_desc = 1;
+	}
+
 	irq = platform_get_irq(dev, 0);
 	if (irq < 0) {
 		dev_err(&dev->dev, "no irq provided");
@@ -203,9 +216,10 @@ static int ehci_platform_resume(struct device *dev)
 #define ehci_platform_resume	NULL
 #endif /* CONFIG_PM */
 
-static const struct of_device_id vt8500_ehci_ids[] = {
+static const struct of_device_id ehci_platform_ids[] = {
 	{ .compatible = "via,vt8500-ehci", },
 	{ .compatible = "wm,prizm-ehci", },
+	{ .compatible = "usb-ehci", },
 	{}
 };
 
@@ -229,7 +243,7 @@ static struct platform_driver ehci_platform_driver = {
 		.owner	= THIS_MODULE,
 		.name	= "ehci-platform",
 		.pm	= &ehci_platform_pm_ops,
-		.of_match_table = vt8500_ehci_ids,
+		.of_match_table = ehci_platform_ids,
 	}
 };
 
diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
deleted file mode 100644
index 932293f..0000000
--- a/drivers/usb/host/ehci-ppc-of.c
+++ /dev/null
@@ -1,236 +0,0 @@
-/*
- * EHCI HCD (Host Controller Driver) for USB.
- *
- * Bus Glue for PPC On-Chip EHCI driver on the of_platform bus
- * Tested on AMCC PPC 440EPx
- *
- * Valentine Barshak <vbarshak@ru.mvista.com>
- *
- * Based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
- * and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
- *
- * This file is licenced under the GPL.
- */
-
-#include <linux/err.h>
-#include <linux/signal.h>
-
-#include <linux/of.h>
-#include <linux/of_platform.h>
-
-
-static const struct hc_driver ehci_ppc_of_hc_driver = {
-	.description		= hcd_name,
-	.product_desc		= "OF EHCI",
-	.hcd_priv_size		= sizeof(struct ehci_hcd),
-
-	/*
-	 * generic hardware linkage
-	 */
-	.irq			= ehci_irq,
-	.flags			= HCD_MEMORY | HCD_USB2,
-
-	/*
-	 * basic lifecycle operations
-	 */
-	.reset			= ehci_setup,
-	.start			= ehci_run,
-	.stop			= ehci_stop,
-	.shutdown		= ehci_shutdown,
-
-	/*
-	 * managing i/o requests and associated device resources
-	 */
-	.urb_enqueue		= ehci_urb_enqueue,
-	.urb_dequeue		= ehci_urb_dequeue,
-	.endpoint_disable	= ehci_endpoint_disable,
-	.endpoint_reset		= ehci_endpoint_reset,
-
-	/*
-	 * scheduling support
-	 */
-	.get_frame_number	= ehci_get_frame,
-
-	/*
-	 * root hub support
-	 */
-	.hub_status_data	= ehci_hub_status_data,
-	.hub_control		= ehci_hub_control,
-#ifdef	CONFIG_PM
-	.bus_suspend		= ehci_bus_suspend,
-	.bus_resume		= ehci_bus_resume,
-#endif
-	.relinquish_port	= ehci_relinquish_port,
-	.port_handed_over	= ehci_port_handed_over,
-
-	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
-};
-
-
-/*
- * 440EPx Errata USBH_3
- * Fix: Enable Break Memory Transfer (BMT) in INSNREG3
- */
-#define PPC440EPX_EHCI0_INSREG_BMT	(0x1 << 0)
-static int
-ppc44x_enable_bmt(struct device_node *dn)
-{
-	__iomem u32 *insreg_virt;
-
-	insreg_virt = of_iomap(dn, 1);
-	if (!insreg_virt)
-		return  -EINVAL;
-
-	out_be32(insreg_virt + 3, PPC440EPX_EHCI0_INSREG_BMT);
-
-	iounmap(insreg_virt);
-	return 0;
-}
-
-
-static int ehci_hcd_ppc_of_probe(struct platform_device *op)
-{
-	struct device_node *dn = op->dev.of_node;
-	struct usb_hcd *hcd;
-	struct ehci_hcd	*ehci = NULL;
-	struct resource res;
-	int irq;
-	int rv;
-
-	struct device_node *np;
-
-	if (usb_disabled())
-		return -ENODEV;
-
-	dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
-
-	rv = of_address_to_resource(dn, 0, &res);
-	if (rv)
-		return rv;
-
-	hcd = usb_create_hcd(&ehci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
-	if (!hcd)
-		return -ENOMEM;
-
-	hcd->rsrc_start = res.start;
-	hcd->rsrc_len = resource_size(&res);
-
-	irq = irq_of_parse_and_map(dn, 0);
-	if (irq == NO_IRQ) {
-		printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
-		rv = -EBUSY;
-		goto err_irq;
-	}
-
-	hcd->regs = devm_ioremap_resource(&op->dev, &res);
-	if (IS_ERR(hcd->regs)) {
-		rv = PTR_ERR(hcd->regs);
-		goto err_ioremap;
-	}
-
-	ehci = hcd_to_ehci(hcd);
-	np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
-	if (np != NULL) {
-		/* claim we really affected by usb23 erratum */
-		if (!of_address_to_resource(np, 0, &res))
-			ehci->ohci_hcctrl_reg =
-				devm_ioremap(&op->dev,
-					     res.start + OHCI_HCCTRL_OFFSET,
-					     OHCI_HCCTRL_LEN);
-		else
-			pr_debug("%s: no ohci offset in fdt\n", __FILE__);
-		if (!ehci->ohci_hcctrl_reg) {
-			pr_debug("%s: ioremap for ohci hcctrl failed\n", __FILE__);
-		} else {
-			ehci->has_amcc_usb23 = 1;
-		}
-	}
-
-	if (of_get_property(dn, "big-endian", NULL)) {
-		ehci->big_endian_mmio = 1;
-		ehci->big_endian_desc = 1;
-	}
-	if (of_get_property(dn, "big-endian-regs", NULL))
-		ehci->big_endian_mmio = 1;
-	if (of_get_property(dn, "big-endian-desc", NULL))
-		ehci->big_endian_desc = 1;
-
-	ehci->caps = hcd->regs;
-
-	if (of_device_is_compatible(dn, "ibm,usb-ehci-440epx")) {
-		rv = ppc44x_enable_bmt(dn);
-		ehci_dbg(ehci, "Break Memory Transfer (BMT) is %senabled!\n",
-				rv ? "NOT ": "");
-	}
-
-	rv = usb_add_hcd(hcd, irq, 0);
-	if (rv)
-		goto err_ioremap;
-
-	return 0;
-
-err_ioremap:
-	irq_dispose_mapping(irq);
-err_irq:
-	usb_put_hcd(hcd);
-
-	return rv;
-}
-
-
-static int ehci_hcd_ppc_of_remove(struct platform_device *op)
-{
-	struct usb_hcd *hcd = platform_get_drvdata(op);
-	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-
-	struct device_node *np;
-	struct resource res;
-
-	dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
-
-	usb_remove_hcd(hcd);
-
-	irq_dispose_mapping(hcd->irq);
-
-	/* use request_mem_region to test if the ohci driver is loaded.  if so
-	 * ensure the ohci core is operational.
-	 */
-	if (ehci->has_amcc_usb23) {
-		np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
-		if (np != NULL) {
-			if (!of_address_to_resource(np, 0, &res))
-				if (!request_mem_region(res.start,
-							    0x4, hcd_name))
-					set_ohci_hcfs(ehci, 1);
-				else
-					release_mem_region(res.start, 0x4);
-			else
-				pr_debug("%s: no ohci offset in fdt\n", __FILE__);
-			of_node_put(np);
-		}
-	}
-	usb_put_hcd(hcd);
-
-	return 0;
-}
-
-
-static const struct of_device_id ehci_hcd_ppc_of_match[] = {
-	{
-		.compatible = "usb-ehci",
-	},
-	{},
-};
-MODULE_DEVICE_TABLE(of, ehci_hcd_ppc_of_match);
-
-
-static struct platform_driver ehci_hcd_ppc_of_driver = {
-	.probe		= ehci_hcd_ppc_of_probe,
-	.remove		= ehci_hcd_ppc_of_remove,
-	.shutdown	= usb_hcd_platform_shutdown,
-	.driver = {
-		.name = "ppc-of-ehci",
-		.owner = THIS_MODULE,
-		.of_match_table = ehci_hcd_ppc_of_match,
-	},
-};
-- 
1.7.10.4

Re: [RFC PATCH] ehci-platform: Merge ppc-of EHCI driver into the ehci-platform driver

[Alan Stern]

On Wed, 6 Nov 2013, Alistair Popple wrote:

> Currently the ppc-of driver uses the compatibility string
> "usb-ehci". This means platforms that use device-tree and implement an
> EHCI compatible interface have to either use the ppc-of driver or add
> a compatible line to the ehci-platform driver. It would be more
> appropriate for the platform driver to be compatible with "usb-ehci"
> as non-powerpc platforms are also beginning to utilise device-tree.
> 
> This patch merges the device tree property parsing from ehci-ppc-of
> into the platform driver and adds a "usb-ehci" compatibility
> string. The existing ehci-ppc-of driver is renamed to ehci-440epx as
> it contains platform specific work arounds for the 440EPX SoC.
> 
> Signed-off-by: Alistair Popple <alistair@popple.id.au>
> ---
> 
> So I could submit something like this that essentially merges the ppc-of 
> driver into the platform driver instead of adding the "ibm,akebono-ehci" 
> compatible line to the platform driver.
> 
> However I'm still fairly new to device-tree so I'm not sure what (if any) the 
> broader impact would be. A quick grep for "usb-ehci" turned up a couple of ARM 
> device tree's using it however they all provided their own drivers and don't 
> select CONFIG_USB_EHCI_HCD_PLATFORM so I'm guess they shouldn't be impacted.
> 
> I have attempted to fix up any PowerPC device trees/configs, although I wasn't 
> sure if "usb-ehci" should remain in sequoia.dts or not given that it needs to 
> use the 440EPX specific driver.
> 
> Also this hasn't been tested (beyond compilation) yet.

> diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-
> platform.c
> index f6b790c..027f368 100644
> --- a/drivers/usb/host/ehci-platform.c
> +++ b/drivers/usb/host/ehci-platform.c
> @@ -77,6 +77,7 @@ static int ehci_platform_probe(struct platform_device *dev)
>  	struct usb_hcd *hcd;
>  	struct resource *res_mem;
>  	struct usb_ehci_pdata *pdata;
> +	struct device_node *dn = dev->dev.of_node;
>  	int irq;
>  	int err = -ENOMEM;
>  
> @@ -96,6 +97,18 @@ static int ehci_platform_probe(struct platform_device *dev)
>  
>  	pdata = dev_get_platdata(&dev->dev);
>  
> +	/* Initialise platform data from device tree if available. */
> +	if (!dn) {

Shouldn't this be "if (dn)"?

> +		if (of_get_property(dn, "big-endian", NULL)) {
> +			pdata->big_endian_mmio = 1;
> +			pdata->big_endian_desc = 1;
> +		}
> +		if (of_get_property(dn, "big-endian-regs", NULL))
> +			pdata->big_endian_mmio = 1;
> +		if (of_get_property(dn, "big-endian-desc", NULL))
> +			pdata->big_endian_desc = 1;
> +	}
> +

This isn't good if there is more than one EHCI controller using 
ehci-platform.  To accomodate such cases, it would be necessary to 
allocate a separate copy of ehci_platform_defaults for each controller.

Alan Stern

Re: [RFC PATCH] ehci-platform: Merge ppc-of EHCI driver into the ehci-platform driver

[Alistair Popple]

On Wed, 6 Nov 2013 11:14:44 Alan Stern wrote:
> On Wed, 6 Nov 2013, Alistair Popple wrote:

[snip]

> > +	/* Initialise platform data from device tree if available. */
> > +	if (!dn) {
> 
> Shouldn't this be "if (dn)"?

Yep. Thanks.

> > +		if (of_get_property(dn, "big-endian", NULL)) {
> > +			pdata->big_endian_mmio = 1;
> > +			pdata->big_endian_desc = 1;
> > +		}
> > +		if (of_get_property(dn, "big-endian-regs", NULL))
> > +			pdata->big_endian_mmio = 1;
> > +		if (of_get_property(dn, "big-endian-desc", NULL))
> > +			pdata->big_endian_desc = 1;
> > +	}
> > +
> 
> This isn't good if there is more than one EHCI controller using
> ehci-platform.  To accomodate such cases, it would be necessary to
> allocate a separate copy of ehci_platform_defaults for each controller.

OK, that's a problem. Rather than allocating platform data for each controller 
I will move the device tree parsing into ehci_platform_reset().

> Alan Stern

Re: [RFC PATCH] ehci-platform: Merge ppc-of EHCI driver into the ehci-platform driver

[Benjamin Herrenschmidt]

On Wed, 2013-11-06 at 18:39 +1100, Alistair Popple wrote:

> diff --git a/arch/powerpc/boot/dts/sequoia.dts 
> b/arch/powerpc/boot/dts/sequoia.dts
> index b1d3292..e28371e 100644
> --- a/arch/powerpc/boot/dts/sequoia.dts
> +++ b/arch/powerpc/boot/dts/sequoia.dts
> @@ -153,7 +153,7 @@
>  		};
>  
>  		USB0: ehci@e0000300 {
> -			compatible = "ibm,usb-ehci-440epx", "usb-ehci";
> +			compatible = "ibm,usb-ehci-440epx";

Compatible properties are string lists so it *should* be ok to have all
of them in the list. However I do remember Russell mentioning a problem
with the current matching code so adding him on CC for comments.


> +/*
> + * 440EPx Errata USBH_3
> + * Fix: Enable Break Memory Transfer (BMT) in INSNREG3
> + */
> +#define PPC440EPX_EHCI0_INSREG_BMT	(0x1 << 0)
> +static int
> +ppc44x_enable_bmt(struct device_node *dn)
> +{
> +	__iomem u32 *insreg_virt;
> +
> +	insreg_virt = of_iomap(dn, 1);
> +	if (!insreg_virt)
> +		return  -EINVAL;
> +
> +	out_be32(insreg_virt + 3, PPC440EPX_EHCI0_INSREG_BMT);
> +
> +	iounmap(insreg_virt);
> +	return 0;
> +}
> +

I would go even further and add the 44x workarounds to the normal
platform device, with a compatible check in there. That isn't the
first time we add quirks to an existing driver.

> +	/* Initialise platform data from device tree if available. */
> +	if (!dn) {

That was supposed to be if (dn) no ?

> +		if (of_get_property(dn, "big-endian", NULL)) {
> +			pdata->big_endian_mmio = 1;
> +			pdata->big_endian_desc = 1;
> +		}
> +		if (of_get_property(dn, "big-endian-regs", NULL))
> +			pdata->big_endian_mmio = 1;
> +		if (of_get_property(dn, "big-endian-desc", NULL))
> +			pdata->big_endian_desc = 1;
> +	}
> +
>  	irq = platform_get_irq(dev, 0);
>  	if (irq < 0) {
>  		dev_err(&dev->dev, "no irq provided");
> @@ -203,9 +216,10 @@ static int ehci_platform_resume(struct device *dev)
>  #define ehci_platform_resume	NULL
>  #endif /* CONFIG_PM */
>  
> -static const struct of_device_id vt8500_ehci_ids[] = {
> +static const struct of_device_id ehci_platform_ids[] = {
>  	{ .compatible = "via,vt8500-ehci", },
>  	{ .compatible = "wm,prizm-ehci", },
> +	{ .compatible = "usb-ehci", },
>  	{}
>  };

Cheers,
Ben.

Re: [RFC PATCH] ehci-platform: Merge ppc-of EHCI driver into the ehci-platform driver

[Alistair Popple]

On Thu, 7 Nov 2013 06:57:00 Benjamin Herrenschmidt wrote:
> On Wed, 2013-11-06 at 18:39 +1100, Alistair Popple wrote:

[snip]

> 
> I would go even further and add the 44x workarounds to the normal
> platform device, with a compatible check in there. That isn't the
> first time we add quirks to an existing driver.

Ok, easily done. I guess I was just cautious of adding a bunch of platform 
specific code into an otherwise generic driver as there seems to be a number 
of other platforms with their own quirks and it would be easy to end up with a 
driver full of platform specific quirks.

That said it is probably better than the current situation in which each 
platform has its own copy/variation of the generic code in ehci-platform.

Unless anyone is against this I will merge the 440EPX specific quirks into the 
ehci-platform driver and submit it as part of the next version of the Akebono 
patch series.

> > +	/* Initialise platform data from device tree if available. */
> > +	if (!dn) {
> 
> That was supposed to be if (dn) no ?

It sure was, thanks.

> 
> > +		if (of_get_property(dn, "big-endian", NULL)) {
> > +			pdata->big_endian_mmio = 1;
> > +			pdata->big_endian_desc = 1;
> > +		}
> > +		if (of_get_property(dn, "big-endian-regs", NULL))
> > +			pdata->big_endian_mmio = 1;
> > +		if (of_get_property(dn, "big-endian-desc", NULL))
> > +			pdata->big_endian_desc = 1;
> > +	}
> > +
> > 
> >  	irq = platform_get_irq(dev, 0);
> >  	if (irq < 0) {
> >  	
> >  		dev_err(&dev->dev, "no irq provided");
> > 
> > @@ -203,9 +216,10 @@ static int ehci_platform_resume(struct device *dev)
> > 
> >  #define ehci_platform_resume	NULL
> >  #endif /* CONFIG_PM */
> > 
> > -static const struct of_device_id vt8500_ehci_ids[] = {
> > +static const struct of_device_id ehci_platform_ids[] = {
> > 
> >  	{ .compatible = "via,vt8500-ehci", },
> >  	{ .compatible = "wm,prizm-ehci", },
> > 
> > +	{ .compatible = "usb-ehci", },
> > 
> >  	{}
> >  
> >  };
> 
> Cheers,
> Ben.

[PATCH 6/7] IBM Currituck: Clean up board specific code before adding Akebono code

[Alistair Popple]

The IBM Akebono code uses the same initialisation functions as the
earlier Currituck board. Rather than create a copy of this code for
Akebono we will instead integrate support for it into the same file as
the Currituck code.

This patch simply renames the file.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
---
 arch/powerpc/platforms/44x/Makefile    |    2 +-
 arch/powerpc/platforms/44x/currituck.c |  233 --------------------------------
 arch/powerpc/platforms/44x/ppc476fpe.c |  233 ++++++++++++++++++++++++++++++++
 3 files changed, 234 insertions(+), 234 deletions(-)
 delete mode 100644 arch/powerpc/platforms/44x/currituck.c
 create mode 100644 arch/powerpc/platforms/44x/ppc476fpe.c

diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
index d03833a..c4fe9cd 100644
--- a/arch/powerpc/platforms/44x/Makefile
+++ b/arch/powerpc/platforms/44x/Makefile
@@ -10,4 +10,4 @@ obj-$(CONFIG_XILINX_VIRTEX_5_FXT) += virtex.o
 obj-$(CONFIG_XILINX_ML510) += virtex_ml510.o
 obj-$(CONFIG_ISS4xx)	+= iss4xx.o
 obj-$(CONFIG_CANYONLANDS)+= canyonlands.o
-obj-$(CONFIG_CURRITUCK)	+= currituck.o
+obj-$(CONFIG_CURRITUCK)	+= ppc476fpe.o
diff --git a/arch/powerpc/platforms/44x/currituck.c b/arch/powerpc/platforms/44x/currituck.c
deleted file mode 100644
index 7f1b71a..0000000
--- a/arch/powerpc/platforms/44x/currituck.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * Currituck board specific routines
- *
- * Copyright © 2011 Tony Breeds IBM Corporation
- *
- * Based on earlier code:
- *    Matt Porter <mporter@kernel.crashing.org>
- *    Copyright 2002-2005 MontaVista Software Inc.
- *
- *    Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
- *    Copyright (c) 2003-2005 Zultys Technologies
- *
- *    Rewritten and ported to the merged powerpc tree:
- *    Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
- *    Copyright © 2011 David Kliekamp IBM Corporation
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/rtc.h>
-
-#include <asm/machdep.h>
-#include <asm/prom.h>
-#include <asm/udbg.h>
-#include <asm/time.h>
-#include <asm/uic.h>
-#include <asm/ppc4xx.h>
-#include <asm/mpic.h>
-#include <asm/mmu.h>
-
-#include <linux/pci.h>
-
-static __initdata struct of_device_id ppc47x_of_bus[] = {
-	{ .compatible = "ibm,plb4", },
-	{ .compatible = "ibm,plb6", },
-	{ .compatible = "ibm,opb", },
-	{ .compatible = "ibm,ebc", },
-	{},
-};
-
-/* The EEPROM is missing and the default values are bogus.  This forces USB in
- * to EHCI mode */
-static void quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
-{
-	if (of_machine_is_compatible("ibm,currituck")) {
-		pci_write_config_dword(dev, 0xe0, 0x0114231f);
-		pci_write_config_dword(dev, 0xe4, 0x00006c40);
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
-
-static int __init ppc47x_device_probe(void)
-{
-	of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
-
-	return 0;
-}
-machine_device_initcall(ppc47x, ppc47x_device_probe);
-
-/* We can have either UICs or MPICs */
-static void __init ppc47x_init_irq(void)
-{
-	struct device_node *np;
-
-	/* Find top level interrupt controller */
-	for_each_node_with_property(np, "interrupt-controller") {
-		if (of_get_property(np, "interrupts", NULL) == NULL)
-			break;
-	}
-	if (np == NULL)
-		panic("Can't find top level interrupt controller");
-
-	/* Check type and do appropriate initialization */
-	if (of_device_is_compatible(np, "chrp,open-pic")) {
-		/* The MPIC driver will get everything it needs from the
-		 * device-tree, just pass 0 to all arguments
-		 */
-		struct mpic *mpic =
-			mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC     ");
-		BUG_ON(mpic == NULL);
-		mpic_init(mpic);
-		ppc_md.get_irq = mpic_get_irq;
-	} else
-		panic("Unrecognized top level interrupt controller");
-}
-
-#ifdef CONFIG_SMP
-static void smp_ppc47x_setup_cpu(int cpu)
-{
-	mpic_setup_this_cpu();
-}
-
-static int smp_ppc47x_kick_cpu(int cpu)
-{
-	struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
-	const u64 *spin_table_addr_prop;
-	u32 *spin_table;
-	extern void start_secondary_47x(void);
-
-	BUG_ON(cpunode == NULL);
-
-	/* Assume spin table. We could test for the enable-method in
-	 * the device-tree but currently there's little point as it's
-	 * our only supported method
-	 */
-	spin_table_addr_prop =
-		of_get_property(cpunode, "cpu-release-addr", NULL);
-
-	if (spin_table_addr_prop == NULL) {
-		pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
-		       cpu);
-		return 1;
-	}
-
-	/* Assume it's mapped as part of the linear mapping. This is a bit
-	 * fishy but will work fine for now
-	 *
-	 * XXX: Is there any reason to assume differently?
-	 */
-	spin_table = (u32 *)__va(*spin_table_addr_prop);
-	pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
-
-	spin_table[3] = cpu;
-	smp_wmb();
-	spin_table[1] = __pa(start_secondary_47x);
-	mb();
-
-	return 0;
-}
-
-static struct smp_ops_t ppc47x_smp_ops = {
-	.probe		= smp_mpic_probe,
-	.message_pass	= smp_mpic_message_pass,
-	.setup_cpu	= smp_ppc47x_setup_cpu,
-	.kick_cpu	= smp_ppc47x_kick_cpu,
-	.give_timebase	= smp_generic_give_timebase,
-	.take_timebase	= smp_generic_take_timebase,
-};
-
-static void __init ppc47x_smp_init(void)
-{
-	if (mmu_has_feature(MMU_FTR_TYPE_47x))
-		smp_ops = &ppc47x_smp_ops;
-}
-
-#else /* CONFIG_SMP */
-static void __init ppc47x_smp_init(void) { }
-#endif /* CONFIG_SMP */
-
-static void __init ppc47x_setup_arch(void)
-{
-
-	/* No need to check the DMA config as we /know/ our windows are all of
- 	 * RAM.  Lets hope that doesn't change */
-	swiotlb_detect_4g();
-
-	ppc47x_smp_init();
-}
-
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init ppc47x_probe(void)
-{
-	unsigned long root = of_get_flat_dt_root();
-
-	if (!of_flat_dt_is_compatible(root, "ibm,currituck"))
-		return 0;
-
-	return 1;
-}
-
-static int board_rev = -1;
-static int __init ppc47x_get_board_rev(void)
-{
-	u8 fpga_reg0;
-	void *fpga;
-	struct device_node *np;
-
-	np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
-	if (!np)
-		goto fail;
-
-	fpga = of_iomap(np, 0);
-	of_node_put(np);
-	if (!fpga)
-		goto fail;
-
-	fpga_reg0 = ioread8(fpga);
-	board_rev = fpga_reg0 & 0x03;
-	pr_info("%s: Found board revision %d\n", __func__, board_rev);
-	iounmap(fpga);
-	return 0;
-
-fail:
-	pr_info("%s: Unable to find board revision\n", __func__);
-	return 0;
-}
-machine_arch_initcall(ppc47x, ppc47x_get_board_rev);
-
-/* Use USB controller should have been hardware swizzled but it wasn't :( */
-static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
-{
-	if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
-	                              dev->device == 0x00e0)) {
-		if (board_rev == 0) {
-			dev->irq = irq_create_mapping(NULL, 47);
-			pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
-		} else if (board_rev == 2) {
-			dev->irq = irq_create_mapping(NULL, 49);
-			pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
-		} else {
-			pr_alert("%s: Unknown board revision\n", __func__);
-		}
-	}
-}
-
-define_machine(ppc47x) {
-	.name			= "PowerPC 47x",
-	.probe			= ppc47x_probe,
-	.progress		= udbg_progress,
-	.init_IRQ		= ppc47x_init_irq,
-	.setup_arch		= ppc47x_setup_arch,
-	.pci_irq_fixup		= ppc47x_pci_irq_fixup,
-	.restart		= ppc4xx_reset_system,
-	.calibrate_decr		= generic_calibrate_decr,
-};
diff --git a/arch/powerpc/platforms/44x/ppc476fpe.c b/arch/powerpc/platforms/44x/ppc476fpe.c
new file mode 100644
index 0000000..c6c5a6f
--- /dev/null
+++ b/arch/powerpc/platforms/44x/ppc476fpe.c
@@ -0,0 +1,233 @@
+/*
+ * PowerPC 476FPE board specific routines
+ *
+ * Copyright © 2011 Tony Breeds IBM Corporation
+ *
+ * Based on earlier code:
+ *    Matt Porter <mporter@kernel.crashing.org>
+ *    Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *    Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *    Copyright (c) 2003-2005 Zultys Technologies
+ *
+ *    Rewritten and ported to the merged powerpc tree:
+ *    Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
+ *    Copyright © 2011 David Kliekamp IBM Corporation
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/rtc.h>
+
+#include <asm/machdep.h>
+#include <asm/prom.h>
+#include <asm/udbg.h>
+#include <asm/time.h>
+#include <asm/uic.h>
+#include <asm/ppc4xx.h>
+#include <asm/mpic.h>
+#include <asm/mmu.h>
+
+#include <linux/pci.h>
+
+static struct of_device_id ppc47x_of_bus[] __initdata = {
+	{ .compatible = "ibm,plb4", },
+	{ .compatible = "ibm,plb6", },
+	{ .compatible = "ibm,opb", },
+	{ .compatible = "ibm,ebc", },
+	{},
+};
+
+/* The EEPROM is missing and the default values are bogus.  This forces USB in
+ * to EHCI mode */
+static void quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
+{
+	if (of_machine_is_compatible("ibm,currituck")) {
+		pci_write_config_dword(dev, 0xe0, 0x0114231f);
+		pci_write_config_dword(dev, 0xe4, 0x00006c40);
+	}
+}
+DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
+
+static int __init ppc47x_device_probe(void)
+{
+	of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
+
+	return 0;
+}
+machine_device_initcall(ppc47x, ppc47x_device_probe);
+
+/* We can have either UICs or MPICs */
+static void __init ppc47x_init_irq(void)
+{
+	struct device_node *np;
+
+	/* Find top level interrupt controller */
+	for_each_node_with_property(np, "interrupt-controller") {
+		if (of_get_property(np, "interrupts", NULL) == NULL)
+			break;
+	}
+	if (np == NULL)
+		panic("Can't find top level interrupt controller");
+
+	/* Check type and do appropriate initialization */
+	if (of_device_is_compatible(np, "chrp,open-pic")) {
+		/* The MPIC driver will get everything it needs from the
+		 * device-tree, just pass 0 to all arguments
+		 */
+		struct mpic *mpic =
+			mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC     ");
+		BUG_ON(mpic == NULL);
+		mpic_init(mpic);
+		ppc_md.get_irq = mpic_get_irq;
+	} else
+		panic("Unrecognized top level interrupt controller");
+}
+
+#ifdef CONFIG_SMP
+static void smp_ppc47x_setup_cpu(int cpu)
+{
+	mpic_setup_this_cpu();
+}
+
+static int smp_ppc47x_kick_cpu(int cpu)
+{
+	struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
+	const u64 *spin_table_addr_prop;
+	u32 *spin_table;
+	extern void start_secondary_47x(void);
+
+	BUG_ON(cpunode == NULL);
+
+	/* Assume spin table. We could test for the enable-method in
+	 * the device-tree but currently there's little point as it's
+	 * our only supported method
+	 */
+	spin_table_addr_prop =
+		of_get_property(cpunode, "cpu-release-addr", NULL);
+
+	if (spin_table_addr_prop == NULL) {
+		pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
+		       cpu);
+		return 1;
+	}
+
+	/* Assume it's mapped as part of the linear mapping. This is a bit
+	 * fishy but will work fine for now
+	 *
+	 * XXX: Is there any reason to assume differently?
+	 */
+	spin_table = (u32 *)__va(*spin_table_addr_prop);
+	pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
+
+	spin_table[3] = cpu;
+	smp_wmb();
+	spin_table[1] = __pa(start_secondary_47x);
+	mb();
+
+	return 0;
+}
+
+static struct smp_ops_t ppc47x_smp_ops = {
+	.probe		= smp_mpic_probe,
+	.message_pass	= smp_mpic_message_pass,
+	.setup_cpu	= smp_ppc47x_setup_cpu,
+	.kick_cpu	= smp_ppc47x_kick_cpu,
+	.give_timebase	= smp_generic_give_timebase,
+	.take_timebase	= smp_generic_take_timebase,
+};
+
+static void __init ppc47x_smp_init(void)
+{
+	if (mmu_has_feature(MMU_FTR_TYPE_47x))
+		smp_ops = &ppc47x_smp_ops;
+}
+
+#else /* CONFIG_SMP */
+static void __init ppc47x_smp_init(void) { }
+#endif /* CONFIG_SMP */
+
+static void __init ppc47x_setup_arch(void)
+{
+
+	/* No need to check the DMA config as we /know/ our windows are all of
+	 * RAM.  Lets hope that doesn't change */
+	swiotlb_detect_4g();
+
+	ppc47x_smp_init();
+}
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init ppc47x_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	if (!of_flat_dt_is_compatible(root, "ibm,currituck"))
+		return 0;
+
+	return 1;
+}
+
+static int board_rev = -1;
+static int __init ppc47x_get_board_rev(void)
+{
+	u8 fpga_reg0;
+	void *fpga;
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
+	if (!np)
+		goto fail;
+
+	fpga = of_iomap(np, 0);
+	of_node_put(np);
+	if (!fpga)
+		goto fail;
+
+	fpga_reg0 = ioread8(fpga);
+	board_rev = fpga_reg0 & 0x03;
+	pr_info("%s: Found board revision %d\n", __func__, board_rev);
+	iounmap(fpga);
+	return 0;
+
+fail:
+	pr_info("%s: Unable to find board revision\n", __func__);
+	return 0;
+}
+machine_arch_initcall(ppc47x, ppc47x_get_board_rev);
+
+/* Use USB controller should have been hardware swizzled but it wasn't :( */
+static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
+{
+	if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
+				      dev->device == 0x00e0)) {
+		if (board_rev == 0) {
+			dev->irq = irq_create_mapping(NULL, 47);
+			pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
+		} else if (board_rev == 2) {
+			dev->irq = irq_create_mapping(NULL, 49);
+			pr_info("%s: Mapping irq %d\n", __func__, dev->irq);
+		} else {
+			pr_alert("%s: Unknown board revision\n", __func__);
+		}
+	}
+}
+
+define_machine(ppc47x) {
+	.name			= "PowerPC 47x",
+	.probe			= ppc47x_probe,
+	.progress		= udbg_progress,
+	.init_IRQ		= ppc47x_init_irq,
+	.setup_arch		= ppc47x_setup_arch,
+	.pci_irq_fixup		= ppc47x_pci_irq_fixup,
+	.restart		= ppc4xx_reset_system,
+	.calibrate_decr		= generic_calibrate_decr,
+};
-- 
1.7.10.4

[PATCH 7/7] IBM Akebono: Add the Akebono platform

[Alistair Popple]

This patch adds support for the IBM Akebono board.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
---
 .../devicetree/bindings/powerpc/4xx/akebono.txt    |   76 ++++
 arch/powerpc/boot/Makefile                         |    3 +
 arch/powerpc/boot/dcr.h                            |    2 +
 arch/powerpc/boot/dts/akebono.dts                  |  385 ++++++++++++++++++++
 arch/powerpc/boot/treeboot-akebono.c               |  179 +++++++++
 arch/powerpc/boot/wrapper                          |    3 +
 arch/powerpc/configs/44x/akebono_defconfig         |  148 ++++++++
 arch/powerpc/platforms/44x/Kconfig                 |   28 ++
 arch/powerpc/platforms/44x/Makefile                |    1 +
 arch/powerpc/platforms/44x/ppc476fpe.c             |  112 ++++--
 10 files changed, 914 insertions(+), 23 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/powerpc/4xx/akebono.txt
 create mode 100644 arch/powerpc/boot/dts/akebono.dts
 create mode 100644 arch/powerpc/boot/treeboot-akebono.c
 create mode 100644 arch/powerpc/configs/44x/akebono_defconfig

diff --git a/Documentation/devicetree/bindings/powerpc/4xx/akebono.txt b/Documentation/devicetree/bindings/powerpc/4xx/akebono.txt
new file mode 100644
index 0000000..cb5272d
--- /dev/null
+++ b/Documentation/devicetree/bindings/powerpc/4xx/akebono.txt
@@ -0,0 +1,76 @@
+
+IBM Akebono board device tree
+=============================
+
+The IBM Akebono board is a development board for a 476FPE bases SoC.
+
+0) The root node
+
+   Required properties:
+
+   - model : "ibm,akebono".
+   - compatible : "ibm,akebono" , "ibm,476fpe".
+
+1.a) The Open Host Controller Interface (OHCI) nodes
+
+  Represent the USB 1.x Open Host Controller Interfaces.
+
+  Required properties:
+
+   - compatible : should be "ibm,akebono-ohci".
+   - reg : should contain the OHCI registers location and length.
+   - interrupt-parent : a phandle for the interrupt controller.
+   - interrupts : should contain the OHCI interrupt.
+
+1.b) The Open Host Controller Interface (EHCI) nodes
+
+  Represent the USB 2.0 Enhanced Host Controller Interface.
+
+  Required properties:
+
+   - compatible : should be "ibm,akebono-ehci".
+   - reg : should contain the EHCI registers location and length.
+   - interrupt-parent : a phandle for the interrupt controller.
+   - interrupts : should contain the EHCI interrupt.
+
+1.c) The Secure Digital Host Controller Interface (SDHCI) node
+
+  Represent the Secure Digital Host Controller Interfaces.
+
+  Required properties:
+
+   - compatible : should be "ibm,akebono-sdhci","sdhci".
+   - reg : should contain the SDHCI registers location and length.
+   - interrupt-parent : a phandle for the interrupt controller.
+   - interrupts : should contain the SDHCI interrupt.
+
+1.d) The Advanced Host Controller Interface (AHCI) SATA node
+
+  Represents the advanced host controller SATA interface.
+
+  Required properties:
+
+   - compatible : should be "ibm,akebono-ahci".
+   - reg : should contain the AHCI registers location and length.
+   - interrupt-parent : a phandle for the interrupt controller.
+   - interrupts : should contain the AHCI interrupt.
+
+1.e) The FPGA node
+
+  The Akebono board stores some board information such as the revision
+  number in an FPGA which is represented by this node.
+
+  Required properties:
+
+   - compatible : should be "ibm,akebono-fpga".
+   - reg : should contain the FPGA registers location and length.
+
+1.f) The AVR node
+
+  The Akebono board has an Atmel AVR microprocessor attached to the I2C
+  bus as a power controller for the board.
+
+  Required properties:
+
+   - compatible : should be "ibm,akebono-avr".
+   - reg : should contain the I2C bus address for the AVR.
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 15ca225..645ff21 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -46,6 +46,7 @@ $(obj)/cuboot-acadia.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-walnut.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-iss4xx.o: BOOTCFLAGS += -mcpu=405
 $(obj)/treeboot-currituck.o: BOOTCFLAGS += -mcpu=405
+$(obj)/treeboot-akebono.o: BOOTCFLAGS += -mcpu=405
 $(obj)/virtex405-head.o: BOOTAFLAGS += -mcpu=405
 
 
@@ -85,6 +86,7 @@ src-plat-$(CONFIG_44x) += treeboot-ebony.c cuboot-ebony.c treeboot-bamboo.c \
 				cuboot-taishan.c cuboot-katmai.c \
 				cuboot-warp.c cuboot-yosemite.c \
 				treeboot-iss4xx.c treeboot-currituck.c \
+				treeboot-akebono.c \
 				simpleboot.c fixed-head.S virtex.c
 src-plat-$(CONFIG_8xx) += cuboot-8xx.c fixed-head.S ep88xc.c redboot-8xx.c
 src-plat-$(CONFIG_PPC_MPC52xx) += cuboot-52xx.c
@@ -235,6 +237,7 @@ image-$(CONFIG_YOSEMITE)		+= cuImage.yosemite
 image-$(CONFIG_ISS4xx)			+= treeImage.iss4xx \
 					   treeImage.iss4xx-mpic
 image-$(CONFIG_CURRITUCK)			+= treeImage.currituck
+image-$(CONFIG_AKEBONO)			+= treeImage.akebono
 
 # Board ports in arch/powerpc/platform/8xx/Kconfig
 image-$(CONFIG_MPC86XADS)		+= cuImage.mpc866ads
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index cc73f7a..2585965 100644
--- a/arch/powerpc/boot/dcr.h
+++ b/arch/powerpc/boot/dcr.h
@@ -15,6 +15,8 @@
 		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "r"(rn)); \
 		rval; \
 	})
+#define mtdcrx(rn, val) \
+	asm volatile("mtdcrx %0,%1" : : "r"(rn), "r" (val))
 
 /* 440GP/440GX SDRAM controller DCRs */
 #define DCRN_SDRAM0_CFGADDR				0x010
diff --git a/arch/powerpc/boot/dts/akebono.dts b/arch/powerpc/boot/dts/akebono.dts
new file mode 100644
index 0000000..4ced658
--- /dev/null
+++ b/arch/powerpc/boot/dts/akebono.dts
@@ -0,0 +1,385 @@
+/*
+ * Device Tree Source for IBM Embedded PPC 476 Platform
+ *
+ * Copyright © 2013 Tony Breeds IBM Corporation
+ * Copyright © 2013 Alistair Popple IBM Corporation
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without
+ * any warranty of any kind, whether express or implied.
+ */
+
+/dts-v1/;
+
+/memreserve/ 0x01f00000 0x00100000;	// spin table
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+	model = "ibm,akebono";
+	compatible = "ibm,akebono", "ibm,476fpe";
+	dcr-parent = <&{/cpus/cpu@0}>;
+
+	aliases {
+		serial0 = &UART0;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			model = "PowerPC,476";
+			reg = <0>;
+			clock-frequency = <1600000000>; // 1.6 GHz
+			timebase-frequency = <100000000>; // 100Mhz
+			i-cache-line-size = <32>;
+			d-cache-line-size = <32>;
+			i-cache-size = <32768>;
+			d-cache-size = <32768>;
+			dcr-controller;
+			dcr-access-method = "native";
+			status = "ok";
+		};
+		cpu@1 {
+			device_type = "cpu";
+			model = "PowerPC,476";
+			reg = <1>;
+			clock-frequency = <1600000000>; // 1.6 GHz
+			timebase-frequency = <100000000>; // 100Mhz
+			i-cache-line-size = <32>;
+			d-cache-line-size = <32>;
+			i-cache-size = <32768>;
+			d-cache-size = <32768>;
+			dcr-controller;
+			dcr-access-method = "native";
+			status = "disabled";
+			enable-method = "spin-table";
+			cpu-release-addr = <0x0 0x01f00000>;
+		};
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x0>; // filled in by zImage
+	};
+
+	MPIC: interrupt-controller {
+		compatible = "chrp,open-pic";
+		interrupt-controller;
+		dcr-reg = <0xffc00000 0x00040000>;
+		#address-cells = <0>;
+		#size-cells = <0>;
+		#interrupt-cells = <2>;
+		single-cpu-affinity;
+	};
+
+	plb {
+		compatible = "ibm,plb6";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+		clock-frequency = <200000000>; // 200Mhz
+
+		MAL0: mcmal {
+			compatible = "ibm,mcmal-476fp", "ibm,mcmal2";
+			dcr-reg = <0xc0000000 0x062>;
+			num-tx-chans = <1>;
+			num-rx-chans = <1>;
+			#address-cells = <0>;
+			#size-cells = <0>;
+			interrupt-parent = <&MPIC>;
+			interrupts = <	/*TXEOB*/ 77 0x4
+					/*RXEOB*/ 78 0x4
+					/*SERR*/  76 0x4
+					/*TXDE*/  79 0x4
+					/*RXDE*/  80 0x4>;
+		};
+
+		SATA0: sata@30000010000 {
+			compatible = "ibm,akebono-ahci";
+			reg = <0x300 0x00010000 0x0 0x10000>;
+			interrupt-parent = <&MPIC>;
+			interrupts = <93 2>;
+		};
+
+		EHCI0: ehci@30010000000 {
+			compatible = "ibm,akebono-ehci";
+			reg = <0x300 0x10000000 0x0 0x10000>;
+			interrupt-parent = <&MPIC>;
+			interrupts = <85 2>;
+		};
+
+		SD0: sd@30000000000 {
+			compatible = "ibm,akebono-sdhci", "sdhci";
+			reg = <0x300 0x00000000 0x0 0x10000>;
+			interrupts = <91 2>;
+			interrupt-parent = <&MPIC>;
+		};
+
+		OHCI0: ohci@30010010000 {
+			compatible = "ibm,akebono-ohci";
+			reg = <0x300 0x10010000 0x0 0x10000>;
+			interrupt-parent = <&MPIC>;
+			interrupts = <89 1>;
+			};
+
+		OHCI1: ohci@30010020000 {
+			compatible = "ibm,akebono-ohci";
+			reg = <0x300 0x10020000 0x0 0x10000>;
+			interrupt-parent = <&MPIC>;
+			interrupts = <88 1>;
+			};
+
+		POB0: opb {
+			compatible = "ibm,opb-4xx", "ibm,opb";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			/* Wish there was a nicer way of specifying a full
+			 * 32-bit range
+			 */
+			ranges = <0x00000000 0x0000033f 0x00000000 0x80000000
+				  0x80000000 0x0000033f 0x80000000 0x80000000>;
+			clock-frequency = <100000000>;
+
+			RGMII0: emac-rgmii-wol@50004 {
+				compatible = "ibm,rgmii-wol-476fp", "ibm,rgmii-wol";
+				reg = <0x50004 0x00000008>;
+				has-mdio;
+			};
+
+			EMAC0: ethernet@30000 {
+				device_type = "network";
+				compatible = "ibm,emac-476fp", "ibm,emac4sync";
+				interrupt-parent = <&EMAC0>;
+				interrupts = <0x0 0x1>;
+				#interrupt-cells = <1>;
+				#address-cells = <0>;
+				#size-cells = <0>;
+				interrupt-map = </*Status*/ 0x0 &MPIC 81 0x4
+						 /*Wake*/   0x1 &MPIC 82 0x4>;
+				reg = <0x30000 0x78>;
+
+				/* local-mac-address will normally be added by
+				 * the wrapper. If your device doesn't support
+				 * passing data to the wrapper (in the form
+				 * local-mac-addr=<hwaddr>) then you will need
+				 * to set it manually here. */
+				//local-mac-address = [000000000000];
+
+				mal-device = <&MAL0>;
+				mal-tx-channel = <0>;
+				mal-rx-channel = <0>;
+				cell-index = <0>;
+				max-frame-size = <9000>;
+				rx-fifo-size = <4096>;
+				tx-fifo-size = <2048>;
+				rx-fifo-size-gige = <16384>;
+				phy-mode = "rgmii";
+				phy-map = <0x00000000>;
+				rgmii-wol-device = <&RGMII0>;
+				has-inverted-stacr-oc;
+				has-new-stacr-staopc;
+			};
+
+			UART0: serial@10000 {
+				device_type = "serial";
+				compatible = "ns16750", "ns16550";
+				reg = <0x10000 0x00000008>;
+				virtual-reg = <0xe8010000>;
+				clock-frequency = <1851851>;
+				current-speed = <38400>;
+				interrupt-parent = <&MPIC>;
+				interrupts = <39 2>;
+			};
+
+			IIC0: i2c@00000000 {
+				compatible = "ibm,iic-akebono", "ibm,iic";
+				reg = <0x0 0x00000020>;
+				interrupt-parent = <&MPIC>;
+				interrupts = <37 2>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				rtc@68 {
+					compatible = "stm,m41t80", "m41st85";
+					reg = <0x68>;
+				};
+			};
+
+			IIC1: i2c@00000100 {
+				compatible = "ibm,iic-akebono", "ibm,iic";
+				reg = <0x100 0x00000020>;
+				interrupt-parent = <&MPIC>;
+				interrupts = <38 2>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				avr@58 {
+					compatible = "ibm,akebono-avr";
+					reg = <0x58>;
+				};
+			};
+
+			FPGA0: fpga@ebc00000 {
+				compatible = "ibm,akebono-fpga";
+				reg = <0xebc00000 0x8>;
+			};
+		};
+
+		PCIE0: pciex@10100000000 {
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-476fpe", "ibm,plb-pciex";
+			primary;
+			port = <0x0>; /* port number */
+			reg = <0x00000101 0x00000000 0x0 0x10000000	       /* Config space access */
+			       0x00000100 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0xc0 0x20>;
+
+//                                pci_space  < pci_addr          > < cpu_addr          > < size       >
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000110 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x00000140 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 45 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 46 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 47 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 48 0x2 /* int D */>;
+		};
+
+		PCIE1: pciex@20100000000 {
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-476fpe", "ibm,plb-pciex";
+			primary;
+			port = <0x1>; /* port number */
+			reg = <0x00000201 0x00000000 0x0 0x10000000	       /* Config space access */
+			       0x00000200 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0x100 0x20>;
+
+//                                pci_space  < pci_addr          > < cpu_addr          > < size       >
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000210 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x00000240 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 53 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 54 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 55 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 56 0x2 /* int D */>;
+		};
+
+		PCIE2: pciex@18100000000 {
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-476fpe", "ibm,plb-pciex";
+			primary;
+			port = <0x2>; /* port number */
+			reg = <0x00000181 0x00000000 0x0 0x10000000	       /* Config space access */
+			       0x00000180 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0xe0 0x20>;
+
+//                                pci_space  < pci_addr          > < cpu_addr          > < size       >
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000190 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x000001c0 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 61 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 62 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 63 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 64 0x2 /* int D */>;
+		};
+
+		PCIE3: pciex@28100000000 {
+			device_type = "pci";
+			#interrupt-cells = <1>;
+			#size-cells = <2>;
+			#address-cells = <3>;
+			compatible = "ibm,plb-pciex-476fpe", "ibm,plb-pciex";
+			primary;
+			port = <0x3>; /* port number */
+			reg = <0x00000281 0x00000000 0x0 0x10000000	       /* Config space access */
+			       0x00000280 0x00000000 0x0 0x00001000>;	/* UTL Registers space access */
+			dcr-reg = <0x120 0x20>;
+
+//                                pci_space  < pci_addr          > < cpu_addr          > < size       >
+			ranges = <0x02000000 0x00000000 0x80000000 0x00000290 0x80000000 0x0 0x80000000
+			          0x01000000 0x0        0x0        0x000002c0 0x0        0x0 0x00010000>;
+
+			/* Inbound starting at 0 to memsize filled in by zImage */
+			dma-ranges = <0x42000000 0x0 0x0 0x0 0x0 0x0 0x0>;
+
+			/* This drives busses 0 to 0xf */
+			bus-range = <0x0 0xf>;
+
+			/* Legacy interrupts (note the weird polarity, the bridge seems
+			 * to invert PCIe legacy interrupts).
+			 * We are de-swizzling here because the numbers are actually for
+			 * port of the root complex virtual P2P bridge. But I want
+			 * to avoid putting a node for it in the tree, so the numbers
+			 * below are basically de-swizzled numbers.
+			 * The real slot is on idsel 0, so the swizzling is 1:1
+			 */
+			interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+			interrupt-map = <
+				0x0 0x0 0x0 0x1 &MPIC 69 0x2 /* int A */
+				0x0 0x0 0x0 0x2 &MPIC 70 0x2 /* int B */
+				0x0 0x0 0x0 0x3 &MPIC 71 0x2 /* int C */
+				0x0 0x0 0x0 0x4 &MPIC 72 0x2 /* int D */>;
+		};
+	};
+
+	chosen {
+		linux,stdout-path = &UART0;
+	};
+};
diff --git a/arch/powerpc/boot/treeboot-akebono.c b/arch/powerpc/boot/treeboot-akebono.c
new file mode 100644
index 0000000..4bc6f8d
--- /dev/null
+++ b/arch/powerpc/boot/treeboot-akebono.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright © 2013 Tony Breeds IBM Corporation
+ * Copyright © 2013 Alistair Popple IBM Corporation
+ *
+ * Based on earlier code:
+ *   Copyright (C) Paul Mackerras 1997.
+ *
+ *   Matt Porter <mporter@kernel.crashing.org>
+ *   Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *   Copyright (c) 2003, 2004 Zultys Technologies
+ *
+ *    Copyright 2007 David Gibson, IBM Corporation.
+ *    Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
+ *    Copyright © 2011 David Kleikamp IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <stdarg.h>
+#include <stddef.h>
+#include "types.h"
+#include "elf.h"
+#include "string.h"
+#include "stdlib.h"
+#include "stdio.h"
+#include "page.h"
+#include "ops.h"
+#include "reg.h"
+#include "io.h"
+#include "dcr.h"
+#include "4xx.h"
+#include "44x.h"
+#include "libfdt.h"
+
+BSS_STACK(4096);
+
+#define MAX_RANKS	0x4
+#define DDR3_MR0CF	0x80010011U
+#define CCTL0_MCO2	0x8000080FU
+#define CCTL0_MCO3	0x80000810U
+#define CCTL0_MCO4	0x80000811U
+#define CCTL0_MCO5	0x80000812U
+#define CCTL0_MCO6	0x80000813U
+
+static unsigned long long ibm_akebono_memsize;
+static long long unsigned mac_addr;
+
+static unsigned long long ibm_akebono_detect_memsize(void)
+{
+	u32 reg;
+	unsigned i;
+	unsigned long long memsize = 0;
+
+	for (i = 0; i < MAX_RANKS; i++) {
+		reg = mfdcrx(DDR3_MR0CF + i);
+
+		if (!(reg & 1))
+			continue;
+
+		reg &= 0x0000f000;
+		reg >>= 12;
+		memsize += (0x800000ULL << reg);
+	}
+
+	return memsize;
+}
+
+static void ibm_akebono_fixups(void)
+{
+	void *emac;
+	u32 reg;
+	void *devp = finddevice("/");
+	u32 dma_ranges[7];
+
+	dt_fixup_memory(0x0ULL,  ibm_akebono_memsize);
+
+	while ((devp = find_node_by_devtype(devp, "pci"))) {
+		if (getprop(devp, "dma-ranges", dma_ranges,
+			    sizeof(dma_ranges)) < 0) {
+			printf("%s: Failed to get dma-ranges\r\n", __func__);
+			continue;
+		}
+
+		dma_ranges[5] = ibm_akebono_memsize >> 32;
+		dma_ranges[6] = ibm_akebono_memsize & 0xffffffffUL;
+
+		setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges));
+	}
+
+	/* Fixup the SD timeout frequency */
+	mtdcrx(CCTL0_MCO4, 0x1);
+
+	/* Disable SD high-speed mode (which seems to be broken) */
+	reg = mfdcrx(CCTL0_MCO2) & ~0x2;
+	mtdcrx(CCTL0_MCO2, reg);
+
+	/* Set the MAC address */
+	emac = finddevice("/plb/opb/ethernet");
+	if (emac > 0) {
+		if (mac_addr)
+			setprop(emac, "local-mac-address",
+				((u8 *) &mac_addr) + 2 , 6);
+	}
+}
+
+/* FIXME */
+#define SPRN_PIR	0x11E	/* Processor Indentification Register */
+#define USERDATA_LEN	256	/* Length of userdata passed in by PIBS */
+void platform_init(char *userdata)
+{
+	unsigned long end_of_ram, avail_ram;
+	u32 pir_reg;
+	int node, size;
+	const u32 *timebase;
+	int len, i, userdata_len;
+	char *end;
+
+	userdata[USERDATA_LEN - 1] = '\0';
+	userdata_len = strlen(userdata);
+	for (i = 0; i < userdata_len; i++) {
+		if (strncmp(&userdata[i], "local-mac-addr=", 15) == 0) {
+			if (i > 0 && userdata[i - 1] != ' ') {
+				/* We've only found a substring ending
+				 * with local-mac-addr so this isn't
+				 * our mac address. */
+				continue;
+			}
+
+			mac_addr = strtoull(&userdata[i + 15], &end, 16);
+
+			/* Remove the "local-mac-addr=<...>" from the kernel
+			 * command line, including the tailing space if
+			 * present. */
+			if (*end == ' ')
+				end++;
+
+			len = ((int) end) - ((int) &userdata[i]);
+			memmove(&userdata[i], end,
+				userdata_len - (len + i) + 1);
+			break;
+		}
+	}
+
+	loader_info.cmdline = userdata;
+	loader_info.cmdline_len = 256;
+
+	ibm_akebono_memsize = ibm_akebono_detect_memsize();
+	if (ibm_akebono_memsize >> 32)
+		end_of_ram = ~0UL;
+	else
+		end_of_ram = ibm_akebono_memsize;
+	avail_ram = end_of_ram - (unsigned long)_end;
+
+	simple_alloc_init(_end, avail_ram, 128, 64);
+	platform_ops.fixups = ibm_akebono_fixups;
+	platform_ops.exit = ibm44x_dbcr_reset;
+	pir_reg = mfspr(SPRN_PIR);
+
+	/* Make sure FDT blob is sane */
+	if (fdt_check_header(_dtb_start) != 0)
+		fatal("Invalid device tree blob\n");
+
+	node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
+					     "cpu", sizeof("cpu"));
+	if (!node)
+		fatal("Cannot find cpu node\n");
+	timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
+	if (timebase && (size == 4))
+		timebase_period_ns = 1000000000 / *timebase;
+
+	fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
+	fdt_init(_dtb_start);
+
+	serial_console_init();
+}
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index cd7af84..1260819 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -249,6 +249,9 @@ gamecube|wii)
 treeboot-currituck)
     link_address='0x1000000'
     ;;
+treeboot-akebono)
+    link_address='0x1000000'
+    ;;
 treeboot-iss4xx-mpic)
     platformo="$object/treeboot-iss4xx.o"
     ;;
diff --git a/arch/powerpc/configs/44x/akebono_defconfig b/arch/powerpc/configs/44x/akebono_defconfig
new file mode 100644
index 0000000..7e2530c
--- /dev/null
+++ b/arch/powerpc/configs/44x/akebono_defconfig
@@ -0,0 +1,148 @@
+CONFIG_44x=y
+CONFIG_SMP=y
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_RD_BZIP2=y
+CONFIG_RD_LZMA=y
+CONFIG_RD_XZ=y
+CONFIG_EXPERT=y
+CONFIG_KALLSYMS_ALL=y
+# CONFIG_SLUB_CPU_PARTIAL is not set
+CONFIG_PROFILING=y
+CONFIG_OPROFILE=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEV_BSG is not set
+# CONFIG_POWERNV_MSI is not set
+CONFIG_PPC_47x=y
+# CONFIG_EBONY is not set
+CONFIG_AKEBONO=y
+CONFIG_HIGHMEM=y
+CONFIG_HZ_100=y
+CONFIG_IRQ_ALL_CPUS=y
+# CONFIG_COMPACTION is not set
+CONFIG_CMDLINE_BOOL=y
+CONFIG_CMDLINE=""
+# CONFIG_SUSPEND is not set
+CONFIG_PCI_MSI=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_LRO is not set
+# CONFIG_IPV6 is not set
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_CONNECTOR=y
+CONFIG_MTD=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_JEDECPROBE=y
+CONFIG_MTD_CFI_AMDSTD=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_PROC_DEVICETREE=y
+CONFIG_BLK_DEV_RAM=y
+CONFIG_BLK_DEV_RAM_SIZE=35000
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+# CONFIG_SATA_PMP is not set
+# CONFIG_ATA_SFF is not set
+# CONFIG_NET_VENDOR_3COM is not set
+# CONFIG_NET_VENDOR_ADAPTEC is not set
+# CONFIG_NET_VENDOR_ALTEON is not set
+# CONFIG_NET_VENDOR_AMD is not set
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_VENDOR_ATHEROS is not set
+# CONFIG_NET_CADENCE is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_BROCADE is not set
+# CONFIG_NET_VENDOR_CHELSIO is not set
+# CONFIG_NET_VENDOR_CISCO is not set
+# CONFIG_NET_VENDOR_DEC is not set
+# CONFIG_NET_VENDOR_DLINK is not set
+# CONFIG_NET_VENDOR_EMULEX is not set
+# CONFIG_NET_VENDOR_EXAR is not set
+# CONFIG_NET_VENDOR_HP is not set
+CONFIG_IBM_EMAC=y
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MELLANOX is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_MYRI is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_NVIDIA is not set
+# CONFIG_NET_VENDOR_OKI is not set
+# CONFIG_NET_VENDOR_QLOGIC is not set
+# CONFIG_NET_VENDOR_REALTEK is not set
+# CONFIG_NET_VENDOR_RDC is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SILAN is not set
+# CONFIG_NET_VENDOR_SIS is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_SUN is not set
+# CONFIG_NET_VENDOR_TEHUTI is not set
+# CONFIG_NET_VENDOR_TI is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+# CONFIG_NET_VENDOR_XILINX is not set
+# CONFIG_KEYBOARD_ATKBD is not set
+# CONFIG_MOUSE_PS2 is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_EXTENDED=y
+CONFIG_SERIAL_8250_SHARE_IRQ=y
+CONFIG_SERIAL_OF_PLATFORM=y
+# CONFIG_HW_RANDOM is not set
+CONFIG_I2C_CHARDEV=y
+# CONFIG_HWMON is not set
+CONFIG_THERMAL=y
+# CONFIG_USB_DEFAULT_PERSIST is not set
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_OHCI_HCD=y
+# CONFIG_USB_OHCI_HCD_PCI is not set
+CONFIG_USB_STORAGE=y
+CONFIG_MMC=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_M41T80=y
+CONFIG_EXT2_FS=y
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
+CONFIG_EXT3_FS_POSIX_ACL=y
+CONFIG_EXT3_FS_SECURITY=y
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+CONFIG_VFAT_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_TMPFS=y
+CONFIG_CRAMFS=y
+# CONFIG_NETWORK_FILESYSTEMS is not set
+CONFIG_NLS_DEFAULT="n"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_FS=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DETECT_HUNG_TASK=y
+CONFIG_XMON=y
+CONFIG_XMON_DEFAULT=y
+CONFIG_PPC_EARLY_DEBUG=y
+CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW=0x00010000
+CONFIG_PPC_EARLY_DEBUG_44x_PHYSHIGH=0x33f
+CONFIG_CRYPTO_PCBC=y
+CONFIG_CRYPTO_MD5=y
+CONFIG_CRYPTO_SHA1_PPC=y
+CONFIG_CRYPTO_DES=y
+# CONFIG_CRYPTO_ANSI_CPRNG is not set
+# CONFIG_CRYPTO_HW is not set
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index d6c7506..b67287c 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -195,10 +195,38 @@ config CURRITUCK
 	default n
 	select SWIOTLB
 	select 476FPE
+	select I2C
+	select I2C_IBM_IIC
 	select PPC4xx_PCI_EXPRESS
 	help
 	  This option enables support for the IBM Currituck (476fpe) evaluation board
 
+config AKEBONO
+	bool "IBM Akebono (476fpe) Support"
+	depends on PPC_47x
+	default n
+	select SWIOTLB
+	select 476FPE
+	select PPC4xx_PCI_EXPRESS
+	select I2C
+	select I2C_IBM_IIC
+	select NETDEVICES
+	select ETHERNET
+	select NET_VENDOR_IBM
+	select IBM_EMAC_EMAC4
+	select IBM_EMAC_RGMII_WOL
+	select USB
+	select USB_OHCI_HCD_PLATFORM
+	select USB_EHCI_HCD_PLATFORM
+	select MMC_SDHCI
+	select MMC_SDHCI_PLTFM
+	select MMC_SDHCI_OF_AKEBONO
+	select ATA
+	select SATA_AHCI_PLATFORM
+	help
+	  This option enables support for the IBM Akebono (476fpe) evaluation board
+
+
 config ICON
 	bool "Icon"
 	depends on 44x
diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
index c4fe9cd..e51189c 100644
--- a/arch/powerpc/platforms/44x/Makefile
+++ b/arch/powerpc/platforms/44x/Makefile
@@ -11,3 +11,4 @@ obj-$(CONFIG_XILINX_ML510) += virtex_ml510.o
 obj-$(CONFIG_ISS4xx)	+= iss4xx.o
 obj-$(CONFIG_CANYONLANDS)+= canyonlands.o
 obj-$(CONFIG_CURRITUCK)	+= ppc476fpe.o
+obj-$(CONFIG_AKEBONO)	+= ppc476fpe.o
diff --git a/arch/powerpc/platforms/44x/ppc476fpe.c b/arch/powerpc/platforms/44x/ppc476fpe.c
index c6c5a6f..33986c1 100644
--- a/arch/powerpc/platforms/44x/ppc476fpe.c
+++ b/arch/powerpc/platforms/44x/ppc476fpe.c
@@ -1,7 +1,8 @@
 /*
  * PowerPC 476FPE board specific routines
  *
- * Copyright © 2011 Tony Breeds IBM Corporation
+ * Copyright © 2013 Tony Breeds IBM Corporation
+ * Copyright © 2013 Alistair Popple IBM Corporation
  *
  * Based on earlier code:
  *    Matt Porter <mporter@kernel.crashing.org>
@@ -35,6 +36,7 @@
 #include <asm/mmu.h>
 
 #include <linux/pci.h>
+#include <linux/i2c.h>
 
 static struct of_device_id ppc47x_of_bus[] __initdata = {
 	{ .compatible = "ibm,plb4", },
@@ -55,15 +57,69 @@ static void quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
 
+/* Akebono has an AVR microcontroller attached to the I2C bus
+ * which is used to power off/reset the system. */
+
+/* AVR I2C Commands */
+#define AVR_PWRCTL_CMD (0x26)
+
+/* Flags for the power control I2C commands */
+#define AVR_PWRCTL_PWROFF (0x01)
+#define AVR_PWRCTL_RESET (0x02)
+
+static struct i2c_client *avr_i2c_client;
+static void avr_halt_system(int pwrctl_flags)
+{
+	/* Request the AVR to reset the system */
+	i2c_smbus_write_byte_data(avr_i2c_client,
+				  AVR_PWRCTL_CMD, pwrctl_flags);
+
+	/* Wait for system to be reset */
+	while (1)
+		;
+}
+
+static void avr_power_off_system(void)
+{
+	avr_halt_system(AVR_PWRCTL_PWROFF);
+}
+
+static void avr_reset_system(char *cmd)
+{
+	avr_halt_system(AVR_PWRCTL_RESET);
+}
+
+static int avr_probe(struct i2c_client *client,
+			    const struct i2c_device_id *id)
+{
+	avr_i2c_client = client;
+	ppc_md.restart = avr_reset_system;
+	ppc_md.power_off = avr_power_off_system;
+	return 0;
+}
+
+static const struct i2c_device_id avr_id[] = {
+	{ "akebono-avr", 0 },
+	{ }
+};
+
+static struct i2c_driver avr_driver = {
+	.driver = {
+		.name = "akebono-avr",
+	},
+	.probe = avr_probe,
+	.id_table = avr_id,
+};
+
 static int __init ppc47x_device_probe(void)
 {
+	i2c_add_driver(&avr_driver);
 	of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
 
 	return 0;
 }
 machine_device_initcall(ppc47x, ppc47x_device_probe);
 
-/* We can have either UICs or MPICs */
 static void __init ppc47x_init_irq(void)
 {
 	struct device_node *np;
@@ -163,37 +219,30 @@ static void __init ppc47x_setup_arch(void)
 	ppc47x_smp_init();
 }
 
-/*
- * Called very early, MMU is off, device-tree isn't unflattened
- */
-static int __init ppc47x_probe(void)
-{
-	unsigned long root = of_get_flat_dt_root();
-
-	if (!of_flat_dt_is_compatible(root, "ibm,currituck"))
-		return 0;
-
-	return 1;
-}
-
 static int board_rev = -1;
 static int __init ppc47x_get_board_rev(void)
 {
-	u8 fpga_reg0;
-	void *fpga;
-	struct device_node *np;
+	int reg;
+	u8 *fpga;
+	struct device_node *np = NULL;
+
+	if (of_machine_is_compatible("ibm,currituck")) {
+		np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
+		reg = 0;
+	} else if (of_machine_is_compatible("ibm,akebono")) {
+		np = of_find_compatible_node(NULL, NULL, "ibm,akebono-fpga");
+		reg = 2;
+	}
 
-	np = of_find_compatible_node(NULL, NULL, "ibm,currituck-fpga");
 	if (!np)
 		goto fail;
 
-	fpga = of_iomap(np, 0);
+	fpga = (u8 *) of_iomap(np, 0);
 	of_node_put(np);
 	if (!fpga)
 		goto fail;
 
-	fpga_reg0 = ioread8(fpga);
-	board_rev = fpga_reg0 & 0x03;
+	board_rev = ioread8(fpga + reg) & 0x03;
 	pr_info("%s: Found board revision %d\n", __func__, board_rev);
 	iounmap(fpga);
 	return 0;
@@ -221,13 +270,30 @@ static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
 	}
 }
 
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init ppc47x_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	if (of_flat_dt_is_compatible(root, "ibm,akebono"))
+		return 1;
+
+	if (of_flat_dt_is_compatible(root, "ibm,currituck")) {
+		ppc_md.pci_irq_fixup = ppc47x_pci_irq_fixup;
+		return 1;
+	}
+
+	return 0;
+}
+
 define_machine(ppc47x) {
 	.name			= "PowerPC 47x",
 	.probe			= ppc47x_probe,
 	.progress		= udbg_progress,
 	.init_IRQ		= ppc47x_init_irq,
 	.setup_arch		= ppc47x_setup_arch,
-	.pci_irq_fixup		= ppc47x_pci_irq_fixup,
 	.restart		= ppc4xx_reset_system,
 	.calibrate_decr		= generic_calibrate_decr,
 };
-- 
1.7.10.4