1 files changed, 30 insertions, 36 deletions

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index e66715ba37ed..a728bb82090f 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -33,8 +33,8 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/reset.h>
 #include <linux/spi/spi.h>
-#include <linux/clk/tegra.h>
 
 #define SLINK_COMMAND                   0x000
 #define SLINK_BIT_LENGTH(x)             (((x) & 0x1f) << 0)
@@ -167,10 +167,10 @@ struct tegra_slink_data {
         spinlock_t                              lock;
 
         struct clk                              *clk;
+        struct reset_control                    *rst;
         void __iomem                            *base;
         phys_addr_t                             phys;
         unsigned                                irq;
-        int                                     dma_req_sel;
         u32                                     spi_max_frequency;
         u32                                     cur_speed;
 
@@ -629,15 +629,15 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi,
         dma_addr_t dma_phys;
         int ret;
         struct dma_slave_config dma_sconfig;
-        dma_cap_mask_t mask;
 
-        dma_cap_zero(mask);
-        dma_cap_set(DMA_SLAVE, mask);
-        dma_chan = dma_request_channel(mask, NULL, NULL);
-        if (!dma_chan) {
-                dev_err(tspi->dev,
-                        "Dma channel is not available, will try later\n");
-                return -EPROBE_DEFER;
+        dma_chan = dma_request_slave_channel_reason(tspi->dev,
+                                                dma_to_memory ? "rx" : "tx");
+        if (IS_ERR(dma_chan)) {
+                ret = PTR_ERR(dma_chan);
+                if (ret != -EPROBE_DEFER)
+                        dev_err(tspi->dev,
+                                "Dma channel is not available: %d\n", ret);
+                return ret;
         }
 
         dma_buf = dma_alloc_coherent(tspi->dev, tspi->dma_buf_size,
@@ -648,7 +648,6 @@ static int tegra_slink_init_dma_param(struct tegra_slink_data *tspi,
                 return -ENOMEM;
         }
 
-        dma_sconfig.slave_id = tspi->dma_req_sel;
         if (dma_to_memory) {
                 dma_sconfig.src_addr = tspi->phys + SLINK_RX_FIFO;
                 dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@@ -884,9 +883,9 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_slink_data *tspi)
                 dev_err(tspi->dev,
                         "CpuXfer 0x%08x:0x%08x:0x%08x\n", tspi->command_reg,
                                 tspi->command2_reg, tspi->dma_control_reg);
-                tegra_periph_reset_assert(tspi->clk);
+                reset_control_assert(tspi->rst);
                 udelay(2);
-                tegra_periph_reset_deassert(tspi->clk);
+                reset_control_deassert(tspi->rst);
                 complete(&tspi->xfer_completion);
                 goto exit;
         }
@@ -957,9 +956,9 @@ static irqreturn_t handle_dma_based_xfer(struct tegra_slink_data *tspi)
                 dev_err(tspi->dev,
                         "DmaXfer 0x%08x:0x%08x:0x%08x\n", tspi->command_reg,
                                 tspi->command2_reg, tspi->dma_control_reg);
-                tegra_periph_reset_assert(tspi->clk);
+                reset_control_assert(tspi->rst);
                 udelay(2);
-                tegra_periph_reset_deassert(tspi->clk);
+                reset_control_assert(tspi->rst);
                 complete(&tspi->xfer_completion);
                 spin_unlock_irqrestore(&tspi->lock, flags);
                 return IRQ_HANDLED;
@@ -1020,11 +1019,6 @@ static irqreturn_t tegra_slink_isr(int irq, void *context_data)
 static void tegra_slink_parse_dt(struct tegra_slink_data *tspi)
 {
         struct device_node *np = tspi->dev->of_node;
-        u32 of_dma[2];
-
-        if (of_property_read_u32_array(np, "nvidia,dma-request-selector",
-                                of_dma, 2) >= 0)
-                tspi->dma_req_sel = of_dma[1];
 
         if (of_property_read_u32(np, "spi-max-frequency",
                                         &tspi->spi_max_frequency))
@@ -1118,25 +1112,25 @@ static int tegra_slink_probe(struct platform_device *pdev)
                 goto exit_free_irq;
         }
 
+        tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+        if (IS_ERR(tspi->rst)) {
+                dev_err(&pdev->dev, "can not get reset\n");
+                ret = PTR_ERR(tspi->rst);
+                goto exit_free_irq;
+        }
+
         tspi->max_buf_size = SLINK_FIFO_DEPTH << 2;
         tspi->dma_buf_size = DEFAULT_SPI_DMA_BUF_LEN;
 
-        if (tspi->dma_req_sel) {
-                ret = tegra_slink_init_dma_param(tspi, true);
-                if (ret < 0) {
-                        dev_err(&pdev->dev, "RxDma Init failed, err %d\n", ret);
-                        goto exit_free_irq;
-                }
-
-                ret = tegra_slink_init_dma_param(tspi, false);
-                if (ret < 0) {
-                        dev_err(&pdev->dev, "TxDma Init failed, err %d\n", ret);
-                        goto exit_rx_dma_free;
-                }
-                tspi->max_buf_size = tspi->dma_buf_size;
-                init_completion(&tspi->tx_dma_complete);
-                init_completion(&tspi->rx_dma_complete);
-        }
+        ret = tegra_slink_init_dma_param(tspi, true);
+        if (ret < 0)
+                goto exit_free_irq;
+        ret = tegra_slink_init_dma_param(tspi, false);
+        if (ret < 0)
+                goto exit_rx_dma_free;
+        tspi->max_buf_size = tspi->dma_buf_size;
+        init_completion(&tspi->tx_dma_complete);
+        init_completion(&tspi->rx_dma_complete);
 
         init_completion(&tspi->xfer_completion);