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authorH Hartley Sweeten <hartleys@visionengravers.com>2011-09-20 22:06:17 +0400
committerGrant Likely <grant.likely@secretlab.ca>2011-09-21 19:41:48 +0400
commit7eb187b3cd3f6f285d91a196dbefac9b6adbb07c (patch)
tree2086865907f57e441d15ad16bd8bbdd07c29091a /drivers/spi/spi-dw.h
parent3e3ea716270dc64810f624ad6a3672440b45d3d4 (diff)
downloadlinux-7eb187b3cd3f6f285d91a196dbefac9b6adbb07c.tar.xz
spi: spi-dw: fix all sparse warnings
The dw_{read,write}[lw] macros produce sparse warnings everytime they are used. The "read" ones cause: warning: cast removes address space of expression warning: incorrect type in argument 1 (different address spaces) expected void const volatile [noderef] <asn:2>*addr got unsigned int *<noident> And the "write" ones: warning: cast removes address space of expression warning: incorrect type in argument 2 (different address spaces) expected void volatile [noderef] <asn:2>*addr got unsigned int *<noident> Fix this by removing struct dw_spi_reg and converting all the register offsets to #defines. Then convert the macros into inlined functions so that proper type checking can occur. While here, also fix the three sparse warnings in spi-dw-mid.c due to the return value of ioremap_nocache being stored in a u32 * not a void __iomem *. With these changes the spi-dw* files all build with no sparse warnings. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/spi-dw.h')
-rw-r--r--drivers/spi/spi-dw.h97
1 files changed, 53 insertions, 44 deletions
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 8b7b07bf6c3f..9c57c078031e 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -4,6 +4,33 @@
#include <linux/io.h>
#include <linux/scatterlist.h>
+/* Register offsets */
+#define DW_SPI_CTRL0 0x00
+#define DW_SPI_CTRL1 0x04
+#define DW_SPI_SSIENR 0x08
+#define DW_SPI_MWCR 0x0c
+#define DW_SPI_SER 0x10
+#define DW_SPI_BAUDR 0x14
+#define DW_SPI_TXFLTR 0x18
+#define DW_SPI_RXFLTR 0x1c
+#define DW_SPI_TXFLR 0x20
+#define DW_SPI_RXFLR 0x24
+#define DW_SPI_SR 0x28
+#define DW_SPI_IMR 0x2c
+#define DW_SPI_ISR 0x30
+#define DW_SPI_RISR 0x34
+#define DW_SPI_TXOICR 0x38
+#define DW_SPI_RXOICR 0x3c
+#define DW_SPI_RXUICR 0x40
+#define DW_SPI_MSTICR 0x44
+#define DW_SPI_ICR 0x48
+#define DW_SPI_DMACR 0x4c
+#define DW_SPI_DMATDLR 0x50
+#define DW_SPI_DMARDLR 0x54
+#define DW_SPI_IDR 0x58
+#define DW_SPI_VERSION 0x5c
+#define DW_SPI_DR 0x60
+
/* Bit fields in CTRLR0 */
#define SPI_DFS_OFFSET 0
@@ -55,35 +82,6 @@ enum dw_ssi_type {
SSI_NS_MICROWIRE,
};
-struct dw_spi_reg {
- u32 ctrl0;
- u32 ctrl1;
- u32 ssienr;
- u32 mwcr;
- u32 ser;
- u32 baudr;
- u32 txfltr;
- u32 rxfltr;
- u32 txflr;
- u32 rxflr;
- u32 sr;
- u32 imr;
- u32 isr;
- u32 risr;
- u32 txoicr;
- u32 rxoicr;
- u32 rxuicr;
- u32 msticr;
- u32 icr;
- u32 dmacr;
- u32 dmatdlr;
- u32 dmardlr;
- u32 idr;
- u32 version;
- u32 dr; /* Currently oper as 32 bits,
- though only low 16 bits matters */
-} __packed;
-
struct dw_spi;
struct dw_spi_dma_ops {
int (*dma_init)(struct dw_spi *dws);
@@ -161,23 +159,34 @@ struct dw_spi {
#endif
};
-#define dw_readl(dw, name) \
- __raw_readl(&(((struct dw_spi_reg *)dw->regs)->name))
-#define dw_writel(dw, name, val) \
- __raw_writel((val), &(((struct dw_spi_reg *)dw->regs)->name))
-#define dw_readw(dw, name) \
- __raw_readw(&(((struct dw_spi_reg *)dw->regs)->name))
-#define dw_writew(dw, name, val) \
- __raw_writew((val), &(((struct dw_spi_reg *)dw->regs)->name))
+static inline u32 dw_readl(struct dw_spi *dws, u32 offset)
+{
+ return __raw_readl(dws->regs + offset);
+}
+
+static inline void dw_writel(struct dw_spi *dws, u32 offset, u32 val)
+{
+ __raw_writel(val, dws->regs + offset);
+}
+
+static inline u16 dw_readw(struct dw_spi *dws, u32 offset)
+{
+ return __raw_readw(dws->regs + offset);
+}
+
+static inline void dw_writew(struct dw_spi *dws, u32 offset, u16 val)
+{
+ __raw_writew(val, dws->regs + offset);
+}
static inline void spi_enable_chip(struct dw_spi *dws, int enable)
{
- dw_writel(dws, ssienr, (enable ? 1 : 0));
+ dw_writel(dws, DW_SPI_SSIENR, (enable ? 1 : 0));
}
static inline void spi_set_clk(struct dw_spi *dws, u16 div)
{
- dw_writel(dws, baudr, div);
+ dw_writel(dws, DW_SPI_BAUDR, div);
}
static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
@@ -188,7 +197,7 @@ static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
if (dws->cs_control)
dws->cs_control(1);
- dw_writel(dws, ser, 1 << cs);
+ dw_writel(dws, DW_SPI_SER, 1 << cs);
}
/* Disable IRQ bits */
@@ -196,8 +205,8 @@ static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
{
u32 new_mask;
- new_mask = dw_readl(dws, imr) & ~mask;
- dw_writel(dws, imr, new_mask);
+ new_mask = dw_readl(dws, DW_SPI_IMR) & ~mask;
+ dw_writel(dws, DW_SPI_IMR, new_mask);
}
/* Enable IRQ bits */
@@ -205,8 +214,8 @@ static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
{
u32 new_mask;
- new_mask = dw_readl(dws, imr) | mask;
- dw_writel(dws, imr, new_mask);
+ new_mask = dw_readl(dws, DW_SPI_IMR) | mask;
+ dw_writel(dws, DW_SPI_IMR, new_mask);
}
/*