Non-dts implementation supply required DMA channel numbers as
IORESOURCE_DMA. However, there is was no way to get them from
device tree.
Signed-off-by: Sergei Ianovich <ynv...@gmail.com>
CC: Daniel Mack <zon...@gmail.com>
CC: Arnd Bergmann <a...@arndb.de>
---
v1..v2
* add binding for next-gen dma controller
* use correct dma declararion
* number changed from 5 to 3
Documentation/devicetree/bindings/mmc/pxa-mmc.txt | 5 ++
arch/arm/boot/dts/pxa27x.dtsi | 14 ++++++
drivers/mmc/host/pxamci.c | 59 ++++++++++++++++++-----
3 files changed, 67 insertions(+), 11 deletions(-)
diff --git a/Documentation/devicetree/bindings/mmc/pxa-mmc.txt
b/Documentation/devicetree/bindings/mmc/pxa-mmc.txt
index b7025de..9f54c69 100644
--- a/Documentation/devicetree/bindings/mmc/pxa-mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/pxa-mmc.txt
@@ -5,6 +5,8 @@ Driver bindings for the PXA MCI (MMC/SDIO) interfaces
Required properties:
- compatible: Should be "marvell,pxa-mmc".
- vmmc-supply: A regulator for VMMC
+- dmas: Should be DMA specifiers for RX and TX
+- dma-names: Should be "rx" and "tx"
Optional properties:
- marvell,detect-delay-ms: sets the detection delay timeout in ms.
@@ -21,5 +23,8 @@ mmc0: mmc@41100000 {
interrupts = <23>;
cd-gpios = <&gpio 23 0>;
wp-gpios = <&gpio 24 0>;
+ dmas = <&dma 21
+ &dma 22>;
+ dma-names = "rx", "tx";
};
diff --git a/arch/arm/boot/dts/pxa27x.dtsi b/arch/arm/boot/dts/pxa27x.dtsi
index 44df554..c2a90c5 100644
--- a/arch/arm/boot/dts/pxa27x.dtsi
+++ b/arch/arm/boot/dts/pxa27x.dtsi
@@ -11,10 +11,24 @@
marvell,intc-nr-irqs = <34>;
};
+ dma: dma-controller@40000000 {
+ compatible = "marvell,pdma-1.0";
+ reg = <0x40000000 0x10000>;
+ interrupts = <25>;
+ #dma-cells = <1>;
+ dma-channels = <32>;
+ };
+
gpio: gpio@40e00000 {
compatible = "intel,pxa27x-gpio";
interrupts = <8>, <9>, <10>;
interrupt-names = "gpio0", "gpio1", "gpio_mux";
};
+
+ mmc@41100000 {
+ dmas = <&dma 21
+ &dma 22>;
+ dma-names = "rx", "tx";
+ };
};
};
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index 32fe113..6b67764 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -613,11 +613,46 @@ static int pxamci_of_init(struct platform_device *pdev)
return 0;
}
+
+static int pxamci_of_init_dma(struct platform_device *pdev,
+ struct pxamci_host *host)
+{
+ struct device_node *np = pdev->dev.of_node;
+ u32 tmp;
+ int i;
+ int ret;
+
+ i = of_property_match_string(np, "dma-names", "rx");
+ if (i < 0)
+ return i;
+
+ ret = of_property_read_u32_index(np, "dmas", 2 * i + 1, &tmp);
+ if (ret < 0)
+ return ret;
+ host->dma_drcmrrx = tmp;
+
+ i = of_property_match_string(np, "dma-names", "tx");
+ if (i < 0)
+ return i;
+
+ ret = of_property_read_u32_index(np, "dmas", 2 * i + 1, &tmp);
+ if (ret < 0)
+ return ret;
+ host->dma_drcmrtx = tmp;
+
+ return 0;
+}
#else
static int pxamci_of_init(struct platform_device *pdev)
{
return 0;
}
+
+static int pxamci_of_init_dma(struct platform_device *pdev,
+ struct pxamci_host *host)
+{
+ return -ENODATA;
+}
#endif
static int pxamci_probe(struct platform_device *pdev)
@@ -741,19 +776,21 @@ static int pxamci_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, mmc);
- dmarx = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!dmarx) {
- ret = -ENXIO;
- goto out;
- }
- host->dma_drcmrrx = dmarx->start;
+ if (pxamci_of_init_dma(pdev, host) < 0) {
+ dmarx = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!dmarx) {
+ ret = -ENXIO;
+ goto out;
+ }
+ host->dma_drcmrrx = dmarx->start;
- dmatx = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (!dmatx) {
- ret = -ENXIO;
- goto out;
+ dmatx = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (!dmatx) {
+ ret = -ENXIO;
+ goto out;
+ }
+ host->dma_drcmrtx = dmatx->start;
}
- host->dma_drcmrtx = dmatx->start;
if (host->pdata) {
gpio_cd = host->pdata->gpio_card_detect;
--
1.8.4.3
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