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authorMike Frysinger <vapier@gentoo.org>2009-09-24 01:04:04 +0000
committerMike Frysinger <vapier@gentoo.org>2010-10-18 02:49:33 -0400
commit9c4542c7a3082bf74f00145355ef407ac82c0b3f (patch)
treeea9081cd8ced14c6c8276caf6de4bb9f74ace8d9 /drivers/spi
parentf4f50c3ff7815d83dcbb19341f35db2f408ac4f8 (diff)
downloadop-kernel-dev-9c4542c7a3082bf74f00145355ef407ac82c0b3f.zip
op-kernel-dev-9c4542c7a3082bf74f00145355ef407ac82c0b3f.tar.gz
spi/bfin_spi: convert read/write/duplex funcs to a dedicated ops structure
Rather than having to look up the same 3 sets of functions at the same time, just use an ops structure so we only need to set one pointer. Reported-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi_bfin5xx.c58
1 files changed, 32 insertions, 26 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index 40d9f64..b0de61a 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -42,6 +42,14 @@ MODULE_LICENSE("GPL");
#define DONE_STATE ((void *)2)
#define ERROR_STATE ((void *)-1)
+struct driver_data;
+
+struct transfer_ops {
+ void (*write) (struct driver_data *);
+ void (*read) (struct driver_data *);
+ void (*duplex) (struct driver_data *);
+};
+
struct driver_data {
/* Driver model hookup */
struct platform_device *pdev;
@@ -94,9 +102,7 @@ struct driver_data {
size_t tx_map_len;
u8 n_bytes;
int cs_change;
- void (*write) (struct driver_data *);
- void (*read) (struct driver_data *);
- void (*duplex) (struct driver_data *);
+ const struct transfer_ops *ops;
};
struct chip_data {
@@ -113,9 +119,7 @@ struct chip_data {
u32 cs_gpio;
u16 idle_tx_val;
u8 pio_interrupt; /* use spi data irq */
- void (*write) (struct driver_data *);
- void (*read) (struct driver_data *);
- void (*duplex) (struct driver_data *);
+ const struct transfer_ops *ops;
};
#define DEFINE_SPI_REG(reg, off) \
@@ -294,6 +298,12 @@ static void bfin_spi_u8_duplex(struct driver_data *drv_data)
}
}
+static const struct transfer_ops bfin_transfer_ops_u8 = {
+ .write = bfin_spi_u8_writer,
+ .read = bfin_spi_u8_reader,
+ .duplex = bfin_spi_u8_duplex,
+};
+
static void bfin_spi_u16_writer(struct driver_data *drv_data)
{
/* clear RXS (we check for RXS inside the loop) */
@@ -342,6 +352,12 @@ static void bfin_spi_u16_duplex(struct driver_data *drv_data)
}
}
+static const struct transfer_ops bfin_transfer_ops_u16 = {
+ .write = bfin_spi_u16_writer,
+ .read = bfin_spi_u16_reader,
+ .duplex = bfin_spi_u16_duplex,
+};
+
/* test if ther is more transfer to be done */
static void *bfin_spi_next_transfer(struct driver_data *drv_data)
{
@@ -620,17 +636,13 @@ static void bfin_spi_pump_transfers(unsigned long data)
case 8:
drv_data->n_bytes = 1;
width = CFG_SPI_WORDSIZE8;
- drv_data->read = bfin_spi_u8_reader;
- drv_data->write = bfin_spi_u8_writer;
- drv_data->duplex = bfin_spi_u8_duplex;
+ drv_data->ops = &bfin_transfer_ops_u8;
break;
case 16:
drv_data->n_bytes = 2;
width = CFG_SPI_WORDSIZE16;
- drv_data->read = bfin_spi_u16_reader;
- drv_data->write = bfin_spi_u16_writer;
- drv_data->duplex = bfin_spi_u16_duplex;
+ drv_data->ops = &bfin_transfer_ops_u16;
break;
default:
@@ -638,9 +650,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
transfer->bits_per_word = chip->bits_per_word;
drv_data->n_bytes = chip->n_bytes;
width = chip->width;
- drv_data->write = chip->write;
- drv_data->read = chip->read;
- drv_data->duplex = chip->duplex;
+ drv_data->ops = chip->ops;
break;
}
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
@@ -653,8 +663,8 @@ static void bfin_spi_pump_transfers(unsigned long data)
drv_data->len = transfer->len;
}
dev_dbg(&drv_data->pdev->dev,
- "transfer: drv_data->write is %p, chip->write is %p\n",
- drv_data->write, chip->write);
+ "transfer: drv_data->ops is %p, chip->ops is %p, u8_ops is %p\n",
+ drv_data->ops, chip->ops, &bfin_transfer_ops_u8);
message->state = RUNNING_STATE;
dma_config = 0;
@@ -819,7 +829,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
dev_dbg(&drv_data->pdev->dev,
"IO duplex: cr is 0x%x\n", cr);
- drv_data->duplex(drv_data);
+ drv_data->ops->duplex(drv_data);
if (drv_data->tx != drv_data->tx_end)
tranf_success = 0;
@@ -828,7 +838,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
dev_dbg(&drv_data->pdev->dev,
"IO write: cr is 0x%x\n", cr);
- drv_data->write(drv_data);
+ drv_data->ops->write(drv_data);
if (drv_data->tx != drv_data->tx_end)
tranf_success = 0;
@@ -837,7 +847,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
dev_dbg(&drv_data->pdev->dev,
"IO read: cr is 0x%x\n", cr);
- drv_data->read(drv_data);
+ drv_data->ops->read(drv_data);
if (drv_data->rx != drv_data->rx_end)
tranf_success = 0;
}
@@ -1032,17 +1042,13 @@ static int bfin_spi_setup(struct spi_device *spi)
case 8:
chip->n_bytes = 1;
chip->width = CFG_SPI_WORDSIZE8;
- chip->read = bfin_spi_u8_reader;
- chip->write = bfin_spi_u8_writer;
- chip->duplex = bfin_spi_u8_duplex;
+ chip->ops = &bfin_transfer_ops_u8;
break;
case 16:
chip->n_bytes = 2;
chip->width = CFG_SPI_WORDSIZE16;
- chip->read = bfin_spi_u16_reader;
- chip->write = bfin_spi_u16_writer;
- chip->duplex = bfin_spi_u16_duplex;
+ chip->ops = &bfin_transfer_ops_u16;
break;
default:
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