Merge branch 'master-tmp' into sdk-v1.6.x

master-tmp is the master branch as of
8b60f5ea90c49344692a70f62cd4aa349de38b48
with the following commits reverted due to excessive conflicts:

commit b35a69559c46e066e6f24bb02d5a6090483786e3
Author: Scott Wood <scottwood@freescale.com>
Date:   Fri Apr 18 15:27:52 2014 -0500

    Revert "net: add sysfs helpers for netdev_adjacent logic"

    This reverts commit 0be682ca768d671c91cfd1379759efcb3b29102a.

commit 1c0dc06e47e11bf758f3e84ea90c2178a31dbf0f
Author: Scott Wood <scottwood@freescale.com>
Date:   Fri Apr 18 15:27:47 2014 -0500

    Revert "net: rename sysfs symlinks on device name change"

    This reverts commit 45ce45c69750b93b8262aa66792185bd49150293.

Conflicts:
    drivers/iommu/fsl_pamu.c
    drivers/net/bonding/bond_3ad.c
    drivers/net/bonding/bond_sysfs.c
    drivers/net/bonding/bonding.h
    drivers/net/ethernet/freescale/gianfar.c

Signed-off-by: Scott Wood <scottwood@freescale.com>

Conflicts:
	drivers/iommu/fsl_pamu.c
	drivers/net/bonding/bond_3ad.c
	drivers/net/bonding/bond_sysfs.c
	drivers/net/bonding/bonding.h
	drivers/net/ethernet/freescale/gianfar.c

2 files changed, 116 insertions, 0 deletions

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index b150668..7ef96f1 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -411,6 +411,14 @@ static dma_cookie_t fsl_dma_tx_submit(struct dma_async_tx_descriptor *tx)
 
 	spin_lock_bh(&chan->desc_lock);
 
+#ifdef CONFIG_PM
+	if (unlikely(chan->pm_state != RUNNING)) {
+		chan_dbg(chan, "cannot submit due to suspend\n");
+		spin_unlock_bh(&chan->desc_lock);
+		return -1;
+	}
+#endif
+
 	/*
 	 * assign cookies to all of the software descriptors
 	 * that make up this transaction
@@ -1334,6 +1342,9 @@ static int fsl_dma_chan_probe(struct fsldma_device *fdev,
 	INIT_LIST_HEAD(&chan->ld_running);
 	INIT_LIST_HEAD(&chan->ld_completed);
 	chan->idle = true;
+#ifdef CONFIG_PM
+	chan->pm_state = RUNNING;
+#endif
 
 	chan->common.device = &fdev->common;
 	dma_cookie_init(&chan->common);
@@ -1473,6 +1484,92 @@ static int fsldma_of_remove(struct platform_device *op)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int fsldma_prepare(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct fsldma_device *fdev = platform_get_drvdata(pdev);
+	struct fsldma_chan *chan;
+	int i;
+
+	for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+
+		spin_lock_bh(&chan->desc_lock);
+		chan->pm_state = SUSPENDING;
+		if (!list_empty(&chan->ld_pending))
+			fsl_chan_xfer_ld_queue(chan);
+		spin_unlock_bh(&chan->desc_lock);
+	}
+
+	return 0;
+}
+
+static int fsldma_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct fsldma_device *fdev = platform_get_drvdata(pdev);
+	struct fsldma_chan *chan;
+	int i;
+
+	for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+
+		spin_lock_bh(&chan->desc_lock);
+		if (!chan->idle)
+			goto out;
+		chan->regs_save.mr = DMA_IN(chan, &chan->regs->mr, 32);
+		chan->pm_state = SUSPENDED;
+		spin_unlock_bh(&chan->desc_lock);
+	}
+	return 0;
+
+out:
+	for (; i >= 0; i--) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+		chan->pm_state = RUNNING;
+		spin_unlock_bh(&chan->desc_lock);
+	}
+	return -EBUSY;
+}
+
+static int fsldma_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct fsldma_device *fdev = platform_get_drvdata(pdev);
+	struct fsldma_chan *chan;
+	u32 mode;
+	int i;
+
+	for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
+		chan = fdev->chan[i];
+		if (!chan)
+			continue;
+
+		spin_lock_bh(&chan->desc_lock);
+		mode = chan->regs_save.mr
+			& ~FSL_DMA_MR_CS & ~FSL_DMA_MR_CC & ~FSL_DMA_MR_CA;
+		DMA_OUT(chan, &chan->regs->mr, mode, 32);
+		chan->pm_state = RUNNING;
+		spin_unlock_bh(&chan->desc_lock);
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops fsldma_pm_ops = {
+	.prepare	= fsldma_prepare,
+	.suspend	= fsldma_suspend,
+	.resume		= fsldma_resume,
+};
+#endif
+
 static const struct of_device_id fsldma_of_ids[] = {
 	{ .compatible = "fsl,elo3-dma", },
 	{ .compatible = "fsl,eloplus-dma", },
@@ -1485,6 +1582,9 @@ static struct platform_driver fsldma_of_driver = {
 		.name = "fsl-elo-dma",
 		.owner = THIS_MODULE,
 		.of_match_table = fsldma_of_ids,
+#ifdef CONFIG_PM
+		.pm = &fsldma_pm_ops,
+#endif
 	},
 	.probe = fsldma_of_probe,
 	.remove = fsldma_of_remove,
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index ec19517..eecaf9e 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -134,6 +134,18 @@ struct fsldma_device {
 #define FSL_DMA_CHAN_PAUSE_EXT	0x00001000
 #define FSL_DMA_CHAN_START_EXT	0x00002000
 
+#ifdef CONFIG_PM
+struct fsldma_chan_regs_save {
+	u32 mr;
+};
+
+enum fsldma_pm_state {
+	RUNNING = 0,
+	SUSPENDING,
+	SUSPENDED,
+};
+#endif
+
 struct fsldma_chan {
 	char name[8];			/* Channel name */
 	struct fsldma_chan_regs __iomem *regs;
@@ -161,6 +173,10 @@ struct fsldma_chan {
 	struct tasklet_struct tasklet;
 	u32 feature;
 	bool idle;			/* DMA controller is idle */
+#ifdef CONFIG_PM
+	struct fsldma_chan_regs_save regs_save;
+	enum fsldma_pm_state pm_state;
+#endif
 
 	void (*toggle_ext_pause)(struct fsldma_chan *fsl_chan, int enable);
 	void (*toggle_ext_start)(struct fsldma_chan *fsl_chan, int enable);