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 77fb6472fd5dae0301716b165f3b6ecfd9e12151..8790f2332458cce5c551c561abf4300e46a43cea 100644 (file)
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -75,7 +75,6 @@ struct at91_twi_pdata {
        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 @@ static struct at91_twi_pdata at91rm9200_config = {
        .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 @@ static struct at91_twi_pdata at91sam9x5_config = {
        .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 @@ static const struct of_device_id atmel_twi_dt_ids[] = {
 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 @@ static int at91_twi_configure_dma(struct at91_twi_dev *dev, u32 phy_addr)
        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 @@ static int at91_twi_probe(struct platform_device *pdev)
        }
        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;
        }