Merge commit 'kumar/next' into next

6 files changed, 403 insertions, 117 deletions

diff --git a/arch/powerpc/platforms/85xx/Kconfig b/arch/powerpc/platforms/85xx/Kconfig
index 3a2ade2e443f..bea1f5905ad4 100644
--- a/arch/powerpc/platforms/85xx/Kconfig
+++ b/arch/powerpc/platforms/85xx/Kconfig
@@ -65,6 +65,14 @@ config MPC85xx_RDB
 	help
 	  This option enables support for the MPC85xx RDB (P2020 RDB) board
 
+config P1022_DS
+	bool "Freescale P1022 DS"
+	select DEFAULT_UIMAGE
+	select CONFIG_PHYS_64BIT	# The DTS has 36-bit addresses
+	select SWIOTLB
+	help
+	  This option enables support for the Freescale P1022DS reference board.
+
 config SOCRATES
 	bool "Socrates"
 	select DEFAULT_UIMAGE
diff --git a/arch/powerpc/platforms/85xx/Makefile b/arch/powerpc/platforms/85xx/Makefile
index 387c128f2c8c..a2ec3f8f4d06 100644
--- a/arch/powerpc/platforms/85xx/Makefile
+++ b/arch/powerpc/platforms/85xx/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_MPC8536_DS)  += mpc8536_ds.o
 obj-$(CONFIG_MPC85xx_DS)  += mpc85xx_ds.o
 obj-$(CONFIG_MPC85xx_MDS) += mpc85xx_mds.o
 obj-$(CONFIG_MPC85xx_RDB) += mpc85xx_rdb.o
+obj-$(CONFIG_P1022_DS)    += p1022_ds.o
 obj-$(CONFIG_P4080_DS)    += p4080_ds.o corenet_ds.o
 obj-$(CONFIG_STX_GP3)	  += stx_gp3.o
 obj-$(CONFIG_TQM85xx)	  += tqm85xx.o
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_mds.c b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
index 494513682d70..da64be19d099 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_mds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_mds.c
@@ -158,51 +158,108 @@ static int mpc8568_mds_phy_fixups(struct phy_device *phydev)
 extern void __init mpc85xx_smp_init(void);
 #endif
 
-static void __init mpc85xx_mds_setup_arch(void)
+#ifdef CONFIG_QUICC_ENGINE
+static struct of_device_id mpc85xx_qe_ids[] __initdata = {
+	{ .type = "qe", },
+	{ .compatible = "fsl,qe", },
+	{ },
+};
+
+static void __init mpc85xx_publish_qe_devices(void)
 {
 	struct device_node *np;
-	static u8 __iomem *bcsr_regs = NULL;
-#ifdef CONFIG_PCI
-	struct pci_controller *hose;
-#endif
-	dma_addr_t max = 0xffffffff;
 
-	if (ppc_md.progress)
-		ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!of_device_is_available(np)) {
+		of_node_put(np);
+		return;
+	}
+
+	of_platform_bus_probe(NULL, mpc85xx_qe_ids, NULL);
+}
+
+static void __init mpc85xx_mds_reset_ucc_phys(void)
+{
+	struct device_node *np;
+	static u8 __iomem *bcsr_regs;
 
 	/* Map BCSR area */
 	np = of_find_node_by_name(NULL, "bcsr");
-	if (np != NULL) {
-		struct resource res;
+	if (!np)
+		return;
 
-		of_address_to_resource(np, 0, &res);
-		bcsr_regs = ioremap(res.start, res.end - res.start +1);
-		of_node_put(np);
-	}
+	bcsr_regs = of_iomap(np, 0);
+	of_node_put(np);
+	if (!bcsr_regs)
+		return;
 
-#ifdef CONFIG_PCI
-	for_each_node_by_type(np, "pci") {
-		if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
-		    of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
-			struct resource rsrc;
-			of_address_to_resource(np, 0, &rsrc);
-			if ((rsrc.start & 0xfffff) == 0x8000)
-				fsl_add_bridge(np, 1);
-			else
-				fsl_add_bridge(np, 0);
+	if (machine_is(mpc8568_mds)) {
+#define BCSR_UCC1_GETH_EN	(0x1 << 7)
+#define BCSR_UCC2_GETH_EN	(0x1 << 7)
+#define BCSR_UCC1_MODE_MSK	(0x3 << 4)
+#define BCSR_UCC2_MODE_MSK	(0x3 << 0)
 
-			hose = pci_find_hose_for_OF_device(np);
-			max = min(max, hose->dma_window_base_cur +
-					hose->dma_window_size);
+		/* Turn off UCC1 & UCC2 */
+		clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
+		clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
+
+		/* Mode is RGMII, all bits clear */
+		clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
+					 BCSR_UCC2_MODE_MSK);
+
+		/* Turn UCC1 & UCC2 on */
+		setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
+		setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
+	} else if (machine_is(mpc8569_mds)) {
+#define BCSR7_UCC12_GETHnRST	(0x1 << 2)
+#define BCSR8_UEM_MARVELL_RST	(0x1 << 1)
+#define BCSR_UCC_RGMII		(0x1 << 6)
+#define BCSR_UCC_RTBI		(0x1 << 5)
+		/*
+		 * U-Boot mangles interrupt polarity for Marvell PHYs,
+		 * so reset built-in and UEM Marvell PHYs, this puts
+		 * the PHYs into their normal state.
+		 */
+		clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
+		setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
+
+		setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
+		clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
+
+		for (np = NULL; (np = of_find_compatible_node(np,
+						"network",
+						"ucc_geth")) != NULL;) {
+			const unsigned int *prop;
+			int ucc_num;
+
+			prop = of_get_property(np, "cell-index", NULL);
+			if (prop == NULL)
+				continue;
+
+			ucc_num = *prop - 1;
+
+			prop = of_get_property(np, "phy-connection-type", NULL);
+			if (prop == NULL)
+				continue;
+
+			if (strcmp("rtbi", (const char *)prop) == 0)
+				clrsetbits_8(&bcsr_regs[7 + ucc_num],
+					BCSR_UCC_RGMII, BCSR_UCC_RTBI);
 		}
+	} else if (machine_is(p1021_mds)) {
+#define BCSR11_ENET_MICRST     (0x1 << 5)
+		/* Reset Micrel PHY */
+		clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
+		setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
 	}
-#endif
 
-#ifdef CONFIG_SMP
-	mpc85xx_smp_init();
-#endif
+	iounmap(bcsr_regs);
+}
+
+static void __init mpc85xx_mds_qe_init(void)
+{
+	struct device_node *np;
 
-#ifdef CONFIG_QUICC_ENGINE
 	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
 	if (!np) {
 		np = of_find_node_by_name(NULL, "qe");
@@ -210,6 +267,11 @@ static void __init mpc85xx_mds_setup_arch(void)
 			return;
 	}
 
+	if (!of_device_is_available(np)) {
+		of_node_put(np);
+		return;
+	}
+
 	qe_reset();
 	of_node_put(np);
 
@@ -224,70 +286,7 @@ static void __init mpc85xx_mds_setup_arch(void)
 			par_io_of_config(ucc);
 	}
 
-	if (bcsr_regs) {
-		if (machine_is(mpc8568_mds)) {
-#define BCSR_UCC1_GETH_EN	(0x1 << 7)
-#define BCSR_UCC2_GETH_EN	(0x1 << 7)
-#define BCSR_UCC1_MODE_MSK	(0x3 << 4)
-#define BCSR_UCC2_MODE_MSK	(0x3 << 0)
-
-			/* Turn off UCC1 & UCC2 */
-			clrbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
-			clrbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
-
-			/* Mode is RGMII, all bits clear */
-			clrbits8(&bcsr_regs[11], BCSR_UCC1_MODE_MSK |
-						 BCSR_UCC2_MODE_MSK);
-
-			/* Turn UCC1 & UCC2 on */
-			setbits8(&bcsr_regs[8], BCSR_UCC1_GETH_EN);
-			setbits8(&bcsr_regs[9], BCSR_UCC2_GETH_EN);
-		} else if (machine_is(mpc8569_mds)) {
-#define BCSR7_UCC12_GETHnRST	(0x1 << 2)
-#define BCSR8_UEM_MARVELL_RST	(0x1 << 1)
-#define BCSR_UCC_RGMII		(0x1 << 6)
-#define BCSR_UCC_RTBI		(0x1 << 5)
-			/*
-			 * U-Boot mangles interrupt polarity for Marvell PHYs,
-			 * so reset built-in and UEM Marvell PHYs, this puts
-			 * the PHYs into their normal state.
-			 */
-			clrbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
-			setbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
-
-			setbits8(&bcsr_regs[7], BCSR7_UCC12_GETHnRST);
-			clrbits8(&bcsr_regs[8], BCSR8_UEM_MARVELL_RST);
-
-			for (np = NULL; (np = of_find_compatible_node(np,
-							"network",
-							"ucc_geth")) != NULL;) {
-				const unsigned int *prop;
-				int ucc_num;
-
-				prop = of_get_property(np, "cell-index", NULL);
-				if (prop == NULL)
-					continue;
-
-				ucc_num = *prop - 1;
-
-				prop = of_get_property(np, "phy-connection-type", NULL);
-				if (prop == NULL)
-					continue;
-
-				if (strcmp("rtbi", (const char *)prop) == 0)
-					clrsetbits_8(&bcsr_regs[7 + ucc_num],
-						BCSR_UCC_RGMII, BCSR_UCC_RTBI);
-			}
-
-		} else if (machine_is(p1021_mds)) {
-#define BCSR11_ENET_MICRST     (0x1 << 5)
-			/* Reset Micrel PHY */
-			clrbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
-			setbits8(&bcsr_regs[11], BCSR11_ENET_MICRST);
-		}
-
-		iounmap(bcsr_regs);
-	}
+	mpc85xx_mds_reset_ucc_phys();
 
 	if (machine_is(p1021_mds)) {
 #define MPC85xx_PMUXCR_OFFSET           0x60
@@ -322,8 +321,72 @@ static void __init mpc85xx_mds_setup_arch(void)
 		}
 
 	}
+}
+
+static void __init mpc85xx_mds_qeic_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!of_device_is_available(np)) {
+		of_node_put(np);
+		return;
+	}
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
+	if (!np) {
+		np = of_find_node_by_type(NULL, "qeic");
+		if (!np)
+			return;
+	}
+
+	if (machine_is(p1021_mds))
+		qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
+				qe_ic_cascade_high_mpic);
+	else
+		qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
+	of_node_put(np);
+}
+#else
+static void __init mpc85xx_publish_qe_devices(void) { }
+static void __init mpc85xx_mds_qe_init(void) { }
+static void __init mpc85xx_mds_qeic_init(void) { }
 #endif	/* CONFIG_QUICC_ENGINE */
 
+static void __init mpc85xx_mds_setup_arch(void)
+{
+#ifdef CONFIG_PCI
+	struct pci_controller *hose;
+#endif
+	dma_addr_t max = 0xffffffff;
+
+	if (ppc_md.progress)
+		ppc_md.progress("mpc85xx_mds_setup_arch()", 0);
+
+#ifdef CONFIG_PCI
+	for_each_node_by_type(np, "pci") {
+		if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
+		    of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
+			struct resource rsrc;
+			of_address_to_resource(np, 0, &rsrc);
+			if ((rsrc.start & 0xfffff) == 0x8000)
+				fsl_add_bridge(np, 1);
+			else
+				fsl_add_bridge(np, 0);
+
+			hose = pci_find_hose_for_OF_device(np);
+			max = min(max, hose->dma_window_base_cur +
+					hose->dma_window_size);
+		}
+	}
+#endif
+
+#ifdef CONFIG_SMP
+	mpc85xx_smp_init();
+#endif
+
+	mpc85xx_mds_qe_init();
+
 #ifdef CONFIG_SWIOTLB
 	if (memblock_end_of_DRAM() > max) {
 		ppc_swiotlb_enable = 1;
@@ -369,8 +432,6 @@ static struct of_device_id mpc85xx_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .compatible = "simple-bus", },
-	{ .type = "qe", },
-	{ .compatible = "fsl,qe", },
 	{ .compatible = "gianfar", },
 	{ .compatible = "fsl,rapidio-delta", },
 	{ .compatible = "fsl,mpc8548-guts", },
@@ -382,8 +443,6 @@ static struct of_device_id p1021_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .compatible = "simple-bus", },
-	{ .type = "qe", },
-	{ .compatible = "fsl,qe", },
 	{ .compatible = "gianfar", },
 	{},
 };
@@ -395,16 +454,16 @@ static int __init mpc85xx_publish_devices(void)
 	if (machine_is(mpc8569_mds))
 		simple_gpiochip_init("fsl,mpc8569mds-bcsr-gpio");
 
-	/* Publish the QE devices */
 	of_platform_bus_probe(NULL, mpc85xx_ids, NULL);
+	mpc85xx_publish_qe_devices();
 
 	return 0;
 }
 
 static int __init p1021_publish_devices(void)
 {
-	/* Publish the QE devices */
 	of_platform_bus_probe(NULL, p1021_ids, NULL);
+	mpc85xx_publish_qe_devices();
 
 	return 0;
 }
@@ -441,21 +500,7 @@ static void __init mpc85xx_mds_pic_init(void)
 	of_node_put(np);
 
 	mpic_init(mpic);
-
-#ifdef CONFIG_QUICC_ENGINE
-	np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
-	if (!np) {
-		np = of_find_node_by_type(NULL, "qeic");
-		if (!np)
-			return;
-	}
-	if (machine_is(p1021_mds))
-		qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
-				qe_ic_cascade_high_mpic);
-	else
-		qe_ic_init(np, 0, qe_ic_cascade_muxed_mpic, NULL);
-	of_node_put(np);
-#endif				/* CONFIG_QUICC_ENGINE */
+	mpc85xx_mds_qeic_init();
 }
 
 static int __init mpc85xx_mds_probe(void)
diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c
new file mode 100644
index 000000000000..e1467c937450
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/p1022_ds.c
@@ -0,0 +1,148 @@
+/*
+ * P1022DS board specific routines
+ *
+ * Authors: Travis Wheatley <travis.wheatley@freescale.com>
+ *          Dave Liu <daveliu@freescale.com>
+ *          Timur Tabi <timur@freescale.com>
+ *
+ * Copyright 2010 Freescale Semiconductor, Inc.
+ *
+ * This file is taken from the Freescale P1022DS BSP, with modifications:
+ * 1) No DIU support (pending rewrite of DIU code)
+ * 2) No AMP support
+ * 3) No PCI endpoint support
+ *
+ * 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.
+ */
+
+#include <linux/pci.h>
+#include <linux/of_platform.h>
+#include <linux/lmb.h>
+
+#include <asm/mpic.h>
+#include <asm/swiotlb.h>
+
+#include <sysdev/fsl_soc.h>
+#include <sysdev/fsl_pci.h>
+
+void __init p1022_ds_pic_init(void)
+{
+	struct mpic *mpic;
+	struct resource r;
+	struct device_node *np;
+
+	np = of_find_node_by_type(NULL, "open-pic");
+	if (!np) {
+		pr_err("Could not find open-pic node\n");
+		return;
+	}
+
+	if (of_address_to_resource(np, 0, &r)) {
+		pr_err("Failed to map mpic register space\n");
+		of_node_put(np);
+		return;
+	}
+
+	mpic = mpic_alloc(np, r.start,
+		MPIC_PRIMARY | MPIC_WANTS_RESET |
+		MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
+		MPIC_SINGLE_DEST_CPU,
+		0, 256, " OpenPIC  ");
+
+	BUG_ON(mpic == NULL);
+	of_node_put(np);
+
+	mpic_init(mpic);
+}
+
+#ifdef CONFIG_SMP
+void __init mpc85xx_smp_init(void);
+#endif
+
+/*
+ * Setup the architecture
+ */
+static void __init p1022_ds_setup_arch(void)
+{
+#ifdef CONFIG_PCI
+	struct device_node *np;
+#endif
+	dma_addr_t max = 0xffffffff;
+
+	if (ppc_md.progress)
+		ppc_md.progress("p1022_ds_setup_arch()", 0);
+
+#ifdef CONFIG_PCI
+	for_each_compatible_node(np, "pci", "fsl,p1022-pcie") {
+		struct resource rsrc;
+		struct pci_controller *hose;
+
+		of_address_to_resource(np, 0, &rsrc);
+
+		if ((rsrc.start & 0xfffff) == 0x8000)
+			fsl_add_bridge(np, 1);
+		else
+			fsl_add_bridge(np, 0);
+
+		hose = pci_find_hose_for_OF_device(np);
+		max = min(max, hose->dma_window_base_cur +
+			  hose->dma_window_size);
+	}
+#endif
+
+#ifdef CONFIG_SMP
+	mpc85xx_smp_init();
+#endif
+
+#ifdef CONFIG_SWIOTLB
+	if (lmb_end_of_DRAM() > max) {
+		ppc_swiotlb_enable = 1;
+		set_pci_dma_ops(&swiotlb_dma_ops);
+		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
+	}
+#endif
+
+	pr_info("Freescale P1022 DS reference board\n");
+}
+
+static struct of_device_id __initdata p1022_ds_ids[] = {
+	{ .type = "soc", },
+	{ .compatible = "soc", },
+	{ .compatible = "simple-bus", },
+	{ .compatible = "gianfar", },
+	{},
+};
+
+static int __init p1022_ds_publish_devices(void)
+{
+	return of_platform_bus_probe(NULL, p1022_ds_ids, NULL);
+}
+machine_device_initcall(p1022_ds, p1022_ds_publish_devices);
+
+machine_arch_initcall(p1022_ds, swiotlb_setup_bus_notifier);
+
+/*
+ * Called very early, device-tree isn't unflattened
+ */
+static int __init p1022_ds_probe(void)
+{
+	unsigned long root = of_get_flat_dt_root();
+
+	return of_flat_dt_is_compatible(root, "fsl,p1022ds");
+}
+
+define_machine(p1022_ds) {
+	.name			= "P1022 DS",
+	.probe			= p1022_ds_probe,
+	.setup_arch		= p1022_ds_setup_arch,
+	.init_IRQ		= p1022_ds_pic_init,
+#ifdef CONFIG_PCI
+	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
+#endif
+	.get_irq		= mpic_get_irq,
+	.restart		= fsl_rstcr_restart,
+	.calibrate_decr		= generic_calibrate_decr,
+	.progress		= udbg_progress,
+};
diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c
index 4c3cde911c71..a6b106557be4 100644
--- a/arch/powerpc/platforms/85xx/smp.c
+++ b/arch/powerpc/platforms/85xx/smp.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/kexec.h>
 
 #include <asm/machdep.h>
 #include <asm/pgtable.h>
@@ -24,6 +25,7 @@
 #include <asm/dbell.h>
 
 #include <sysdev/fsl_soc.h>
+#include <sysdev/mpic.h>
 
 extern void __early_start(void);
 
@@ -105,8 +107,64 @@ smp_85xx_setup_cpu(int cpu_nr)
 
 struct smp_ops_t smp_85xx_ops = {
 	.kick_cpu = smp_85xx_kick_cpu,
+#ifdef CONFIG_KEXEC
+	.give_timebase	= smp_generic_give_timebase,
+	.take_timebase	= smp_generic_take_timebase,
+#endif
 };
 
+#ifdef CONFIG_KEXEC
+static int kexec_down_cpus = 0;
+
+void mpc85xx_smp_kexec_cpu_down(int crash_shutdown, int secondary)
+{
+	mpic_teardown_this_cpu(1);
+
+	/* When crashing, this gets called on all CPU's we only
+	 * take down the non-boot cpus */
+	if (smp_processor_id() != boot_cpuid)
+	{
+		local_irq_disable();
+		kexec_down_cpus++;
+
+		while (1);
+	}
+}
+
+static void mpc85xx_smp_kexec_down(void *arg)
+{
+	if (ppc_md.kexec_cpu_down)
+		ppc_md.kexec_cpu_down(0,1);
+}
+
+static void mpc85xx_smp_machine_kexec(struct kimage *image)
+{
+	int timeout = 2000;
+	int i;
+
+	set_cpus_allowed(current, cpumask_of_cpu(boot_cpuid));
+
+	smp_call_function(mpc85xx_smp_kexec_down, NULL, 0);
+
+	while ( (kexec_down_cpus != (num_online_cpus() - 1)) &&
+		( timeout > 0 ) )
+	{
+		timeout--;
+	}
+
+	if ( !timeout )
+		printk(KERN_ERR "Unable to bring down secondary cpu(s)");
+
+	for (i = 0; i < num_present_cpus(); i++)
+	{
+		if ( i == smp_processor_id() ) continue;
+		mpic_reset_core(i);
+	}
+
+	default_machine_kexec(image);
+}
+#endif /* CONFIG_KEXEC */
+
 void __init mpc85xx_smp_init(void)
 {
 	struct device_node *np;
@@ -124,4 +182,9 @@ void __init mpc85xx_smp_init(void)
 	BUG_ON(!smp_85xx_ops.message_pass);
 
 	smp_ops = &smp_85xx_ops;
+
+#ifdef CONFIG_KEXEC
+	ppc_md.kexec_cpu_down = mpc85xx_smp_kexec_cpu_down;
+	ppc_md.machine_kexec = mpc85xx_smp_machine_kexec;
+#endif
 }
diff --git a/arch/powerpc/platforms/85xx/tqm85xx.c b/arch/powerpc/platforms/85xx/tqm85xx.c
index 5b0ab9966e90..8f29bbce5360 100644
--- a/arch/powerpc/platforms/85xx/tqm85xx.c
+++ b/arch/powerpc/platforms/85xx/tqm85xx.c
@@ -151,6 +151,27 @@ static void tqm85xx_show_cpuinfo(struct seq_file *m)
 	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 }
 
+static void __init tqm85xx_ti1520_fixup(struct pci_dev *pdev)
+{
+	unsigned int val;
+
+	/* Do not do the fixup on other platforms! */
+	if (!machine_is(tqm85xx))
+		return;
+
+	dev_info(&pdev->dev, "Using TI 1520 fixup on TQM85xx\n");
+
+	/*
+	 * Enable P2CCLK bit in system control register
+	 * to enable CLOCK output to power chip
+	 */
+	pci_read_config_dword(pdev, 0x80, &val);
+	pci_write_config_dword(pdev, 0x80, val | (1 << 27));
+
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1520,
+		tqm85xx_ti1520_fixup);
+
 static struct of_device_id __initdata of_bus_ids[] = {
 	{ .compatible = "simple-bus", },
 	{ .compatible = "gianfar", },