i2c: at91: remove legacy DMA support
Since at91sam9g45 is now DT-only, all DMA capable users of this driver
are using the DT case, and the legacy support can be removed.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 77fb647..8790f23 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -75,7 +75,6 @@
unsigned clk_max_div;
unsigned clk_offset;
bool has_unre_flag;
- bool has_dma_support;
struct at_dma_slave dma_slave;
};
@@ -556,35 +555,30 @@
.clk_max_div = 5,
.clk_offset = 3,
.has_unre_flag = true,
- .has_dma_support = false,
};
static struct at91_twi_pdata at91sam9261_config = {
.clk_max_div = 5,
.clk_offset = 4,
.has_unre_flag = false,
- .has_dma_support = false,
};
static struct at91_twi_pdata at91sam9260_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
- .has_dma_support = false,
};
static struct at91_twi_pdata at91sam9g20_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
- .has_dma_support = false,
};
static struct at91_twi_pdata at91sam9g10_config = {
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
- .has_dma_support = false,
};
static const struct platform_device_id at91_twi_devtypes[] = {
@@ -613,7 +607,6 @@
.clk_max_div = 7,
.clk_offset = 4,
.has_unre_flag = false,
- .has_dma_support = true,
};
static const struct of_device_id atmel_twi_dt_ids[] = {
@@ -642,30 +635,11 @@
MODULE_DEVICE_TABLE(of, atmel_twi_dt_ids);
#endif
-static bool filter(struct dma_chan *chan, void *pdata)
-{
- struct at91_twi_pdata *sl_pdata = pdata;
- struct at_dma_slave *sl;
-
- if (!sl_pdata)
- return false;
-
- sl = &sl_pdata->dma_slave;
- if (sl && (sl->dma_dev == chan->device->dev)) {
- chan->private = sl;
- return true;
- } else {
- return false;
- }
-}
-
static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr)
{
int ret = 0;
- struct at91_twi_pdata *pdata = dev->pdata;
struct dma_slave_config slave_config;
struct at91_twi_dma *dma = &dev->dma;
- dma_cap_mask_t mask;
memset(&slave_config, 0, sizeof(slave_config));
slave_config.src_addr = (dma_addr_t)phy_addr + AT91_TWI_RHR;
@@ -676,19 +650,14 @@
slave_config.dst_maxburst = 1;
slave_config.device_fc = false;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- dma->chan_tx = dma_request_slave_channel_compat(mask, filter, pdata,
- dev->dev, "tx");
+ dma->chan_tx = dma_request_slave_channel(dev->dev, "tx");
if (!dma->chan_tx) {
dev_err(dev->dev, "can't get a DMA channel for tx\n");
ret = -EBUSY;
goto error;
}
- dma->chan_rx = dma_request_slave_channel_compat(mask, filter, pdata,
- dev->dev, "rx");
+ dma->chan_rx = dma_request_slave_channel(dev->dev, "rx");
if (!dma->chan_rx) {
dev_err(dev->dev, "can't get a DMA channel for rx\n");
ret = -EBUSY;
@@ -787,7 +756,7 @@
}
clk_prepare_enable(dev->clk);
- if (dev->pdata->has_dma_support) {
+ if (dev->dev->of_node) {
if (at91_twi_configure_dma(dev, phy_addr) == 0)
dev->use_dma = true;
}