[PATCH v3 0/2] omap_hsmmc DT DMA Client support

[PATCH v3 0/2] omap_hsmmc DT DMA Client support

[Matt Porter]

Changes since v2:
	- dropped skip platform_get_resource_byname() patch
Changes since v1:
	- rebase to 3.9-rc1, previous dependencies upstream

This series adds DT DMA Engine Client support to the omap_hsmmc.
It leverages the generic DMA OF helpers and the
dma_request_slave_channel_compat() wrapper to support DMA in
omap_hsmmc on platforms booting via DT. These platforms include
omap2/3/4/5 and am33xx.

These patches were split out from the v5 version of the AM33XX DMA
series and split from the EDMA-specific omap_hsmmc changes.

Matt Porter (2):
  mmc: omap_hsmmc: convert to dma_request_slave_channel_compat()
  mmc: omap_hsmmc: add generic DMA request support to the DT binding

 .../devicetree/bindings/mmc/ti-omap-hsmmc.txt      |   26 +++++++++++++++++++-
 drivers/mmc/host/omap_hsmmc.c                      |   10 ++++++--
 2 files changed, 33 insertions(+), 3 deletions(-)

-- 
1.7.9.5

[PATCH v3 1/2] mmc: omap_hsmmc: convert to dma_request_slave_channel_compat()

[Matt Porter]

Convert dmaengine channel requests to use
dma_request_slave_channel_compat(). This supports platforms booting
with or without DT populated.

Signed-off-by: Matt Porter <mporter@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/mmc/host/omap_hsmmc.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index bc58078..e79b12d 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1915,14 +1915,20 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	host->rx_chan = dma_request_channel(mask, omap_dma_filter_fn, &rx_req);
+	host->rx_chan =
+		dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
+						 &rx_req, &pdev->dev, "rx");
+
 	if (!host->rx_chan) {
 		dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
 		ret = -ENXIO;
 		goto err_irq;
 	}
 
-	host->tx_chan = dma_request_channel(mask, omap_dma_filter_fn, &tx_req);
+	host->tx_chan =
+		dma_request_slave_channel_compat(mask, omap_dma_filter_fn,
+						 &tx_req, &pdev->dev, "tx");
+
 	if (!host->tx_chan) {
 		dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
 		ret = -ENXIO;
-- 
1.7.9.5

[PATCH v3 2/2] mmc: omap_hsmmc: add generic DMA request support to the DT binding

[Matt Porter]

The binding definition is based on the generic DMA request binding.

Signed-off-by: Matt Porter <mporter-l0cyMroinI0@public.gmane.org>
Acked-by: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
Acked-by: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
---
 .../devicetree/bindings/mmc/ti-omap-hsmmc.txt      |   26 +++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
index ed271fc..8c8908a 100644
--- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
+++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
@@ -20,8 +20,29 @@ ti,dual-volt: boolean, supports dual voltage cards
 ti,non-removable: non-removable slot (like eMMC)
 ti,needs-special-reset: Requires a special softreset sequence
 ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed
+dmas: List of DMA specifiers with the controller specific format
+as described in the generic DMA client binding. A tx and rx
+specifier is required.
+dma-names: List of DMA request names. These strings correspond
+1:1 with the DMA specifiers listed in dmas. The string naming is
+to be "rx" and "tx" for RX and TX DMA requests, respectively.
+
+Examples:
+
+[hwmod populated DMA resources]
+
+	mmc1: mmc@0x4809c000 {
+		compatible = "ti,omap4-hsmmc";
+		reg = <0x4809c000 0x400>;
+		ti,hwmods = "mmc1";
+		ti,dual-volt;
+		bus-width = <4>;
+		vmmc-supply = <&vmmc>; /* phandle to regulator node */
+		ti,non-removable;
+	};
+
+[generic DMA request binding]
 
-Example:
 	mmc1: mmc@0x4809c000 {
 		compatible = "ti,omap4-hsmmc";
 		reg = <0x4809c000 0x400>;
@@ -30,4 +51,7 @@ Example:
 		bus-width = <4>;
 		vmmc-supply = <&vmmc>; /* phandle to regulator node */
 		ti,non-removable;
+		dmas = <&edma 24
+			&edma 25>;
+		dma-names = "tx", "rx";
 	};
-- 
1.7.9.5

Re: [PATCH v3 0/2] omap_hsmmc DT DMA Client support

[Balaji T K]

On Wednesday 06 March 2013 07:42 PM, Matt Porter wrote:
> Changes since v2:
> 	- dropped skip platform_get_resource_byname() patch
> Changes since v1:
> 	- rebase to 3.9-rc1, previous dependencies upstream
>
> This series adds DT DMA Engine Client support to the omap_hsmmc.
> It leverages the generic DMA OF helpers and the
> dma_request_slave_channel_compat() wrapper to support DMA in
> omap_hsmmc on platforms booting via DT. These platforms include
> omap2/3/4/5 and am33xx.
>
> These patches were split out from the v5 version of the AM33XX DMA
> series and split from the EDMA-specific omap_hsmmc changes.
>
> Matt Porter (2):
>    mmc: omap_hsmmc: convert to dma_request_slave_channel_compat()
>    mmc: omap_hsmmc: add generic DMA request support to the DT binding
>

Looks good to me
Acked-by: Balaji T K <balajitk@ti.com>

>   .../devicetree/bindings/mmc/ti-omap-hsmmc.txt      |   26 +++++++++++++++++++-
>   drivers/mmc/host/omap_hsmmc.c                      |   10 ++++++--
>   2 files changed, 33 insertions(+), 3 deletions(-)
>