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authorArnd Bergmann <arnd@arndb.de>2013-06-20 01:51:18 +0200
committerArnd Bergmann <arnd@arndb.de>2013-06-20 01:51:18 +0200
commitc3b693d1d63444afe4fbf809d8a311b63741e503 (patch)
tree5c0c264203967f1524ac28645f0b5cea57b624bc /drivers/dma
parent596fd95ea606548adaa8310a7c05a6dcfec46f16 (diff)
parent7fca1f20c0f3e9d7a3b23ee1fc9e832f520f3f1a (diff)
Merge tag 'u300-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into next/soc
From Linus Walleij: Device Tree and Multiplatform support for U300: - Add devicetree support to timer, pinctrl (probe), I2C block, watchdog, DMA controller and clocks. - Piecewise add a device tree containing all peripherals. - Delete the ATAG boot path. - Delete redundant platform data and board files. - Convert to multiplatform. * tag 'u300-multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson: (40 commits) ARM: u300: switch to using syscon regmap for board ARM: u300: Update MMC configs for u300 defconfig spi: pl022: use DMA by default when probing from DT pinctrl: get rid of all platform data for coh901 ARM: u300: convert MMC/SD clock to device tree ARM: u300: move the gated system controller clocks to DT i2c: stu300: do not request a specific clock name clk: move the U300 fixed and fixed-factor to DT ARM: u300: remove register definition file ARM: u300: add syscon node ARM: u300 use module_spi_driver to register driver ARM: u300: delete remnant machine headers ARM: u300: convert to multiplatform ARM: u300: localize <mach/u300-regs.h> ARM: u300: delete <mach/irqs.h> ARM: u300: delete <mach/hardware.h> ARM: u300: push down syscon registers ARM: u300: remove deps from debug macro ARM: u300: move debugmacro to debug includes ARM: u300: delete all static board data ... Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/coh901318.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index 3b23061cdb41..9bfaddd57ef1 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -22,6 +22,7 @@
#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/platform_data/dma-coh901318.h>
+#include <linux/of_dma.h>
#include "coh901318.h"
#include "dmaengine.h"
@@ -1788,6 +1789,35 @@ bool coh901318_filter_id(struct dma_chan *chan, void *chan_id)
}
EXPORT_SYMBOL(coh901318_filter_id);
+struct coh901318_filter_args {
+ struct coh901318_base *base;
+ unsigned int ch_nr;
+};
+
+static bool coh901318_filter_base_and_id(struct dma_chan *chan, void *data)
+{
+ struct coh901318_filter_args *args = data;
+
+ if (&args->base->dma_slave == chan->device &&
+ args->ch_nr == to_coh901318_chan(chan)->id)
+ return true;
+
+ return false;
+}
+
+static struct dma_chan *coh901318_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct coh901318_filter_args args = {
+ .base = ofdma->of_dma_data,
+ .ch_nr = dma_spec->args[0],
+ };
+ dma_cap_mask_t cap;
+ dma_cap_zero(cap);
+ dma_cap_set(DMA_SLAVE, cap);
+
+ return dma_request_channel(cap, coh901318_filter_base_and_id, &args);
+}
/*
* DMA channel allocation
*/
@@ -2735,12 +2765,19 @@ static int __init coh901318_probe(struct platform_device *pdev)
if (err)
goto err_register_memcpy;
+ err = of_dma_controller_register(pdev->dev.of_node, coh901318_xlate,
+ base);
+ if (err)
+ goto err_register_of_dma;
+
platform_set_drvdata(pdev, base);
dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
(u32) base->virtbase);
return err;
+ err_register_of_dma:
+ dma_async_device_unregister(&base->dma_memcpy);
err_register_memcpy:
dma_async_device_unregister(&base->dma_slave);
err_register_slave:
@@ -2752,17 +2789,23 @@ static int coh901318_remove(struct platform_device *pdev)
{
struct coh901318_base *base = platform_get_drvdata(pdev);
+ of_dma_controller_free(pdev->dev.of_node);
dma_async_device_unregister(&base->dma_memcpy);
dma_async_device_unregister(&base->dma_slave);
coh901318_pool_destroy(&base->pool);
return 0;
}
+static const struct of_device_id coh901318_dt_match[] = {
+ { .compatible = "stericsson,coh901318" },
+ {},
+};
static struct platform_driver coh901318_driver = {
.remove = coh901318_remove,
.driver = {
.name = "coh901318",
+ .of_match_table = coh901318_dt_match,
},
};