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dma:mmp_tdma: get sram pool through device tree 

Support to get sram pool from generic device tree binding. The
existing way of get sram poll, directly call sram_get_gpool(), still
work here.

Signed-off-by: Nenghua Cao <nhcao@marvell.com>
Acked-by: Zhangfei Gao <zhangfei.gao@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Nenghua Cao 2013-12-13 16:14:31 +08:00 committed by Vinod Koul
parent 96286b5766
commit 3b0f4a54f2
1 changed files with 18 additions and 4 deletions
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22
drivers/dma/mmp_tdma.c
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@ -126,6 +126,8 @@ struct mmp_tdma_chan {
size_t buf_len;
size_t period_len;
size_t pos;
struct gen_pool *pool;
};
#define TDMA_CHANNEL_NUM 2
@ -324,7 +326,7 @@ static void mmp_tdma_free_descriptor(struct mmp_tdma_chan *tdmac)
struct gen_pool *gpool;
int size = tdmac->desc_num * sizeof(struct mmp_tdma_desc);
gpool = sram_get_gpool("asram");
gpool = tdmac->pool;
if (tdmac->desc_arr)
gen_pool_free(gpool, (unsigned long)tdmac->desc_arr,
size);
@ -374,7 +376,7 @@ struct mmp_tdma_desc *mmp_tdma_alloc_descriptor(struct mmp_tdma_chan *tdmac)
struct gen_pool *gpool;
int size = tdmac->desc_num * sizeof(struct mmp_tdma_desc);
gpool = sram_get_gpool("asram");
gpool = tdmac->pool;
if (!gpool)
return NULL;
@ -505,7 +507,8 @@ static int mmp_tdma_remove(struct platform_device *pdev)
}
static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
int idx, int irq, int type)
int idx, int irq,
int type, struct gen_pool *pool)
{
struct mmp_tdma_chan *tdmac;
@ -527,6 +530,7 @@ static int mmp_tdma_chan_init(struct mmp_tdma_device *tdev,
tdmac->idx = idx;
tdmac->type = type;
tdmac->reg_base = tdev->base + idx * 4;
tdmac->pool = pool;
tdmac->status = DMA_COMPLETE;
tdev->tdmac[tdmac->idx] = tdmac;
tasklet_init(&tdmac->tasklet, dma_do_tasklet, (unsigned long)tdmac);
@ -553,6 +557,7 @@ static int mmp_tdma_probe(struct platform_device *pdev)
int i, ret;
int irq = 0, irq_num = 0;
int chan_num = TDMA_CHANNEL_NUM;
struct gen_pool *pool;
of_id = of_match_device(mmp_tdma_dt_ids, &pdev->dev);
if (of_id)
@ -579,6 +584,15 @@ static int mmp_tdma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&tdev->device.channels);
if (pdev->dev.of_node)
pool = of_get_named_gen_pool(pdev->dev.of_node, "asram", 0);
else
pool = sram_get_gpool("asram");
if (!pool) {
dev_err(&pdev->dev, "asram pool not available\n");
return -ENOMEM;
}
if (irq_num != chan_num) {
irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(&pdev->dev, irq,
@ -590,7 +604,7 @@ static int mmp_tdma_probe(struct platform_device *pdev)
/* initialize channel parameters */
for (i = 0; i < chan_num; i++) {
irq = (irq_num != chan_num) ? 0 : platform_get_irq(pdev, i);
ret = mmp_tdma_chan_init(tdev, i, irq, type);
ret = mmp_tdma_chan_init(tdev, i, irq, type, pool);
if (ret)
return ret;
}