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dmaengine: dw: substitute dma_read_byaddr by dma_readl_native

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Since struct dw_dma is allocated and regs member is assigned properly we can
use standard IO accessors to the DMA registers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2016-03-18 16:24:46 +02:00 committed by Vinod Koul
parent a3e557999b
commit 897e40d3b1
2 changed files with 3 additions and 9 deletions
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8
drivers/dma/dw/core.c
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@ -1529,7 +1529,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
pm_runtime_get_sync(chip->dev);
if (!pdata) {
dw_params = dma_read_byaddr(chip->regs, DW_PARAMS);
dw_params = dma_readl(dw, DW_PARAMS);
dev_dbg(chip->dev, "DW_PARAMS: 0x%08x\n", dw_params);
autocfg = dw_params >> DW_PARAMS_EN & 1;
@ -1629,11 +1629,9 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
/* Hardware configuration */
if (autocfg) {
unsigned int dwc_params;
unsigned int r = DW_DMA_MAX_NR_CHANNELS - i - 1;
void __iomem *addr = chip->regs + r * sizeof(u32);
dwc_params = dma_read_byaddr(addr, DWC_PARAMS);
void __iomem *addr = &__dw_regs(dw)->DWC_PARAMS[r];
unsigned int dwc_params = dma_readl_native(addr);
dev_dbg(chip->dev, "DWC_PARAMS[%d]: 0x%08x\n", i,
dwc_params);

4
drivers/dma/dw/regs.h
View File

@ -114,10 +114,6 @@ struct dw_dma_regs {
#define dma_writel_native writel
#endif
/* To access the registers in early stage of probe */
#define dma_read_byaddr(addr, name) \
dma_readl_native((addr) + offsetof(struct dw_dma_regs, name))
/* Bitfields in DW_PARAMS */
#define DW_PARAMS_NR_CHAN 8 /* number of channels */
#define DW_PARAMS_NR_MASTER 11 /* number of AHB masters */