Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver specific changes from Arnd Bergmann:
 "These changes are all driver specific and cross over between arm-soc
  contents and some other subsystem, in these cases cpufreq, crypto,
  dma, pinctrl, mailbox and usb, and the subsystem owners agreed to have
  these changes merged through arm-soc.

  As we proceed to untangle the dependencies between platform code and
  driver code, the amount of changes in this category is fortunately
  shrinking, for 3.11 we have 16 branches here and 101 non-merge
  changesets, the majority of which are for the stedma40 dma engine
  driver used in the ux500 platform.  Cleaning up that code touches
  multiple subsystems, but gets rid of the dependency in the end.

  The mailbox code moved out from mach-omap2 to drivers/mailbox is an
  intermediate step and is still omap specific at the moment.  Patches
  exist to generalize the subsystem and add other drivers with the same
  API, but those did not make it for 3.11."

* tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (101 commits)
  crypto: ux500: use dmaengine_submit API
  crypto: ux500: use dmaengine_prep_slave_sg API
  crypto: ux500: use dmaengine_device_control API
  crypto: ux500/crypt: add missing __iomem qualifiers
  crypto: ux500/hash: add missing static qualifiers
  crypto: ux500/hash: use readl on iomem addresses
  dmaengine: ste_dma40: Declare memcpy config as static
  ARM: ux500: Remove mop500_snowball_ethernet_clock_enable()
  ARM: ux500: Correct the EN_3v3 regulator's on/off GPIO
  ARM: ux500: Provide a AB8500 GPIO Device Tree node
  gpio: rcar: fix gpio_rcar_of_table
  gpio-rcar: Remove #ifdef CONFIG_OF around OF-specific sections
  gpio-rcar: Reference core gpio documentation in the DT bindings
  clk: exynos5250: Add enum entries for divider clock of i2s1 and i2s2
  ARM: dts: Update Samsung I2S documentation
  ARM: dts: add clock provider information for i2s controllers in Exynos5250
  ARM: dts: add Exynos audio subsystem clock controller node
  clk: samsung: register audio subsystem clocks using common clock framework
  ARM: dts: use #include for all device trees for Samsung
  pinctrl: s3c24xx: use correct header for chained_irq functions
  ...

1 files changed, 33 insertions, 26 deletions

diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index 63e7c8a6b125..bfb7a65d83cc 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -34,6 +34,11 @@
 #include <linux/platform_data/usb-musb-ux500.h>
 #include "musb_core.h"
 
+static const char *iep_chan_names[] = { "iep_1_9", "iep_2_10", "iep_3_11", "iep_4_12",
+					"iep_5_13", "iep_6_14", "iep_7_15", "iep_8" };
+static const char *oep_chan_names[] = { "oep_1_9", "oep_2_10", "oep_3_11", "oep_4_12",
+					"oep_5_13", "oep_6_14", "oep_7_15", "oep_8" };
+
 struct ux500_dma_channel {
 	struct dma_channel channel;
 	struct ux500_dma_controller *controller;
@@ -48,10 +53,8 @@ struct ux500_dma_channel {
 
 struct ux500_dma_controller {
 	struct dma_controller controller;
-	struct ux500_dma_channel rx_channel[UX500_MUSB_DMA_NUM_RX_CHANNELS];
-	struct ux500_dma_channel tx_channel[UX500_MUSB_DMA_NUM_TX_CHANNELS];
-	u32	num_rx_channels;
-	u32	num_tx_channels;
+	struct ux500_dma_channel rx_channel[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS];
+	struct ux500_dma_channel tx_channel[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS];
 	void *private_data;
 	dma_addr_t phy_base;
 };
@@ -143,19 +146,15 @@ static struct dma_channel *ux500_dma_channel_allocate(struct dma_controller *c,
 	struct ux500_dma_channel *ux500_channel = NULL;
 	struct musb *musb = controller->private_data;
 	u8 ch_num = hw_ep->epnum - 1;
-	u32 max_ch;
 
-	/* Max 8 DMA channels (0 - 7). Each DMA channel can only be allocated
+	/* 8 DMA channels (0 - 7). Each DMA channel can only be allocated
 	 * to specified hw_ep. For example DMA channel 0 can only be allocated
 	 * to hw_ep 1 and 9.
 	 */
 	if (ch_num > 7)
 		ch_num -= 8;
 
-	max_ch = is_tx ? controller->num_tx_channels :
-			controller->num_rx_channels;
-
-	if (ch_num >= max_ch)
+	if (ch_num >= UX500_MUSB_DMA_NUM_RX_TX_CHANNELS)
 		return NULL;
 
 	ux500_channel = is_tx ? &(controller->tx_channel[ch_num]) :
@@ -263,7 +262,7 @@ static int ux500_dma_controller_stop(struct dma_controller *c)
 	struct dma_channel *channel;
 	u8 ch_num;
 
-	for (ch_num = 0; ch_num < controller->num_rx_channels; ch_num++) {
+	for (ch_num = 0; ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; ch_num++) {
 		channel = &controller->rx_channel[ch_num].channel;
 		ux500_channel = channel->private_data;
 
@@ -273,7 +272,7 @@ static int ux500_dma_controller_stop(struct dma_controller *c)
 			dma_release_channel(ux500_channel->dma_chan);
 	}
 
-	for (ch_num = 0; ch_num < controller->num_tx_channels; ch_num++) {
+	for (ch_num = 0; ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; ch_num++) {
 		channel = &controller->tx_channel[ch_num].channel;
 		ux500_channel = channel->private_data;
 
@@ -294,34 +293,36 @@ static int ux500_dma_controller_start(struct dma_controller *c)
 	struct musb *musb = controller->private_data;
 	struct device *dev = musb->controller;
 	struct musb_hdrc_platform_data *plat = dev->platform_data;
-	struct ux500_musb_board_data *data = plat->board_data;
+	struct ux500_musb_board_data *data;
 	struct dma_channel *dma_channel = NULL;
+	char **chan_names;
 	u32 ch_num;
 	u8 dir;
 	u8 is_tx = 0;
 
 	void **param_array;
 	struct ux500_dma_channel *channel_array;
-	u32 ch_count;
 	dma_cap_mask_t mask;
 
-	if ((data->num_rx_channels > UX500_MUSB_DMA_NUM_RX_CHANNELS) ||
-		(data->num_tx_channels > UX500_MUSB_DMA_NUM_TX_CHANNELS))
+	if (!plat) {
+		dev_err(musb->controller, "No platform data\n");
 		return -EINVAL;
+	}
 
-	controller->num_rx_channels = data->num_rx_channels;
-	controller->num_tx_channels = data->num_tx_channels;
+	data = plat->board_data;
 
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
 	/* Prepare the loop for RX channels */
 	channel_array = controller->rx_channel;
-	ch_count = data->num_rx_channels;
-	param_array = data->dma_rx_param_array;
+	param_array = data ? data->dma_rx_param_array : NULL;
+	chan_names = (char **)iep_chan_names;
 
 	for (dir = 0; dir < 2; dir++) {
-		for (ch_num = 0; ch_num < ch_count; ch_num++) {
+		for (ch_num = 0;
+		     ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS;
+		     ch_num++) {
 			ux500_channel = &channel_array[ch_num];
 			ux500_channel->controller = controller;
 			ux500_channel->ch_num = ch_num;
@@ -332,9 +333,15 @@ static int ux500_dma_controller_start(struct dma_controller *c)
 			dma_channel->status = MUSB_DMA_STATUS_FREE;
 			dma_channel->max_len = SZ_16M;
 
-			ux500_channel->dma_chan = dma_request_channel(mask,
-							data->dma_filter,
-							param_array[ch_num]);
+			ux500_channel->dma_chan =
+				dma_request_slave_channel(dev, chan_names[ch_num]);
+
+			if (!ux500_channel->dma_chan)
+				ux500_channel->dma_chan =
+					dma_request_channel(mask,
+							    data->dma_filter,
+							    param_array[ch_num]);
+
 			if (!ux500_channel->dma_chan) {
 				ERR("Dma pipe allocation error dir=%d ch=%d\n",
 					dir, ch_num);
@@ -349,8 +356,8 @@ static int ux500_dma_controller_start(struct dma_controller *c)
 
 		/* Prepare the loop for TX channels */
 		channel_array = controller->tx_channel;
-		ch_count = data->num_tx_channels;
-		param_array = data->dma_tx_param_array;
+		param_array = data ? data->dma_tx_param_array : NULL;
+		chan_names = (char **)oep_chan_names;
 		is_tx = 1;
 	}