Instead of using magic number in the code the patch provides
DW_DMA_MAX_NR_MASTERS constant.
While here, restrict the reading of data width array by amount of the actual
number of AHB masters.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/dma/snps-dma.txt | 2 +-
arch/arc/boot/dts/abilis_tb10x.dtsi | 2 +-
arch/arm/boot/dts/spear13xx.dtsi | 4 ++--
arch/avr32/mach-at32ap/at32ap700x.c | 2 +-
drivers/dma/dw/core.c | 3 ++-
drivers/dma/dw/platform.c | 4 ++--
drivers/dma/dw/regs.h | 2 +-
include/linux/platform_data/dma-dw.h | 4 +++-
8 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/Documentation/devicetree/bindings/dma/snps-dma.txt b/Documentation/devicetree/bindings/dma/snps-dma.txt
index d58675e..c261598 100644
--- a/Documentation/devicetree/bindings/dma/snps-dma.txt
+++ b/Documentation/devicetree/bindings/dma/snps-dma.txt
@@ -38,7 +38,7 @@ Example:
chan_allocation_order = <1>;
chan_priority = <1>;
block_size = <0xfff>;
- data_width = <3 3 0 0>;
+ data_width = <3 3>;
};
DMA clients connected to the Designware DMA controller must use the format
diff --git a/arch/arc/boot/dts/abilis_tb10x.dtsi b/arch/arc/boot/dts/abilis_tb10x.dtsi
index a098d7c..cfb5052 100644
--- a/arch/arc/boot/dts/abilis_tb10x.dtsi
+++ b/arch/arc/boot/dts/abilis_tb10x.dtsi
@@ -112,7 +112,7 @@
chan_allocation_order = <0>;
chan_priority = <1>;
block_size = <0x7ff>;
- data_width = <2 0 0 0>;
+ data_width = <2>;
clocks = <&ahb_clk>;
clock-names = "hclk";
};
diff --git a/arch/arm/boot/dts/spear13xx.dtsi b/arch/arm/boot/dts/spear13xx.dtsi
index a6eb543..40accc8 100644
--- a/arch/arm/boot/dts/spear13xx.dtsi
+++ b/arch/arm/boot/dts/spear13xx.dtsi
@@ -117,7 +117,7 @@
chan_priority = <1>;
block_size = <0xfff>;
dma-masters = <2>;
- data_width = <3 3 0 0>;
+ data_width = <3 3>;
};
dma@eb000000 {
@@ -133,7 +133,7 @@
chan_allocation_order = <1>;
chan_priority = <1>;
block_size = <0xfff>;
- data_width = <3 3 0 0>;
+ data_width = <3 3>;
};
fsmc: flash@b0000000 {
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index cc92cdb..1d8b147 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -607,7 +607,7 @@ static struct dw_dma_platform_data dw_dmac0_data = {
.nr_channels = 3,
.block_size = 4095U,
.nr_masters = 2,
- .data_width = { 2, 2, 0, 0 },
+ .data_width = { 2, 2 },
};
static struct resource dw_dmac0_resource[] = {
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 5034e0f..455b7a4 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1561,7 +1561,8 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
}
} else {
dw->nr_masters = pdata->nr_masters;
- memcpy(dw->data_width, pdata->data_width, 4);
+ for (i = 0; i < dw->nr_masters; i++)
+ dw->data_width[i] = pdata->data_width[i];
}
/* Calculate all channel mask before DMA setup */
diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c
index 32ea1ac..6565a36 100644
--- a/drivers/dma/dw/platform.c
+++ b/drivers/dma/dw/platform.c
@@ -100,7 +100,7 @@ dw_dma_parse_dt(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct dw_dma_platform_data *pdata;
- u32 tmp, arr[4];
+ u32 tmp, arr[DW_DMA_MAX_NR_MASTERS];
if (!np) {
dev_err(&pdev->dev, "Missing DT data\n");
@@ -127,7 +127,7 @@ dw_dma_parse_dt(struct platform_device *pdev)
pdata->block_size = tmp;
if (!of_property_read_u32(np, "dma-masters", &tmp)) {
- if (tmp > 4)
+ if (tmp > DW_DMA_MAX_NR_MASTERS)
return NULL;
pdata->nr_masters = tmp;
diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h
index 254a1db..241ff2b 100644
--- a/drivers/dma/dw/regs.h
+++ b/drivers/dma/dw/regs.h
@@ -285,7 +285,7 @@ struct dw_dma {
/* hardware configuration */
unsigned char nr_masters;
- unsigned char data_width[4];
+ unsigned char data_width[DW_DMA_MAX_NR_MASTERS];
};
static inline struct dw_dma_regs __iomem *__dw_regs(struct dw_dma *dw)
diff --git a/include/linux/platform_data/dma-dw.h b/include/linux/platform_data/dma-dw.h
index 359127d..87ac14c 100644
--- a/include/linux/platform_data/dma-dw.h
+++ b/include/linux/platform_data/dma-dw.h
@@ -13,6 +13,8 @@
#include <linux/device.h>
+#define DW_DMA_MAX_NR_MASTERS 4
+
/**
* struct dw_dma_slave - Controller-specific information about a slave
*
@@ -53,7 +55,7 @@ struct dw_dma_platform_data {
unsigned char chan_priority;
unsigned short block_size;
unsigned char nr_masters;
- unsigned char data_width[4];
+ unsigned char data_width[DW_DMA_MAX_NR_MASTERS];
};
#endif /* _PLATFORM_DATA_DMA_DW_H */
--
2.1.4
--
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