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[ARM] 5122/1: imx_dma_request_by_prio simpilfication 

imx_dma_request_by_prio can return channel number by itself.
No need to supply variable address through parameters.

Also converted all drivers using this function.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Paulius Zaleckas 2008-06-25 13:25:13 +01:00 committed by Russell King
parent 60a752ef34
commit f7def13ed0
4 changed files with 15 additions and 20 deletions
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13
arch/arm/mach-imx/dma.c
View File

@ -410,7 +410,6 @@ void imx_dma_free(imx_dmach_t dma_ch)
/**
* imx_dma_request_by_prio - find and request some of free channels best suiting requested priority
* @dma_ch: i.MX DMA channel number
* @name: the driver/caller own non-%NULL identification
* @prio: one of the hardware distinguished priority level:
* %DMA_PRIO_HIGH, %DMA_PRIO_MEDIUM, %DMA_PRIO_LOW
@ -420,11 +419,9 @@ void imx_dma_free(imx_dmach_t dma_ch)
* in the higher and then even lower priority groups.
*
* Return value: If there is no free channel to allocate, -%ENODEV is returned.
* Zero value indicates successful channel allocation.
* On successful allocation channel is returned.
*/
int
imx_dma_request_by_prio(imx_dmach_t * pdma_ch, const char *name,
imx_dma_prio prio)
imx_dmach_t imx_dma_request_by_prio(const char *name, imx_dma_prio prio)
{
int i;
int best;
@ -444,15 +441,13 @@ imx_dma_request_by_prio(imx_dmach_t * pdma_ch, const char *name,
for (i = best; i < IMX_DMA_CHANNELS; i++) {
if (!imx_dma_request(i, name)) {
*pdma_ch = i;
return 0;
return i;
}
}
for (i = best - 1; i >= 0; i--) {
if (!imx_dma_request(i, name)) {
*pdma_ch = i;
return 0;
return i;
}
}

4
drivers/mmc/host/imxmmc.c
View File

@ -1017,8 +1017,8 @@ static int imxmci_probe(struct platform_device *pdev)
host->imask = IMXMCI_INT_MASK_DEFAULT;
MMC_INT_MASK = host->imask;
if(imx_dma_request_by_prio(&host->dma, DRIVER_NAME, DMA_PRIO_LOW)<0){
host->dma = imx_dma_request_by_prio(DRIVER_NAME, DMA_PRIO_LOW);
if(host->dma < 0) {
dev_err(mmc_dev(host->mmc), "imx_dma_request_by_prio failed\n");
ret = -EBUSY;
goto out;

16
drivers/spi/spi_imx.c
View File

@ -1526,24 +1526,24 @@ static int __init spi_imx_probe(struct platform_device *pdev)
drv_data->rx_channel = -1;
if (platform_info->enable_dma) {
/* Get rx DMA channel */
status = imx_dma_request_by_prio(&drv_data->rx_channel,
"spi_imx_rx", DMA_PRIO_HIGH);
if (status < 0) {
drv_data->rx_channel = imx_dma_request_by_prio("spi_imx_rx",
DMA_PRIO_HIGH);
if (drv_data->rx_channel < 0) {
dev_err(dev,
"probe - problem (%d) requesting rx channel\n",
status);
drv_data->rx_channel);
goto err_no_rxdma;
} else
imx_dma_setup_handlers(drv_data->rx_channel, NULL,
dma_err_handler, drv_data);
/* Get tx DMA channel */
status = imx_dma_request_by_prio(&drv_data->tx_channel,
"spi_imx_tx", DMA_PRIO_MEDIUM);
if (status < 0) {
drv_data->tx_channel = imx_dma_request_by_prio("spi_imx_tx",
DMA_PRIO_MEDIUM);
if (drv_data->tx_channel < 0) {
dev_err(dev,
"probe - problem (%d) requesting tx channel\n",
status);
drv_data->tx_channel);
imx_dma_free(drv_data->rx_channel);
goto err_no_txdma;
} else

2
include/asm-arm/arch-imx/imx-dma.h
View File

@ -88,7 +88,7 @@ int imx_dma_request(imx_dmach_t dma_ch, const char *name);
void imx_dma_free(imx_dmach_t dma_ch);
int imx_dma_request_by_prio(imx_dmach_t *pdma_ch, const char *name, imx_dma_prio prio);
imx_dmach_t imx_dma_request_by_prio(const char *name, imx_dma_prio prio);
#endif /* _ASM_ARCH_IMX_DMA_H */