Merge tag 'spi-v3.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

[pandora-kernel.git] / drivers / spi / spi-tegra114.c

diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index 47b93cc..413c718 100644 (file)
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -17,7 +17,6 @@
  */
 
 #include <linux/clk.h>
-#include <linux/clk/tegra.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
 #include <linux/dmaengine.h>
@@ -34,6 +33,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/reset.h>
 #include <linux/spi/spi.h>
 
 #define SPI_COMMAND1                           0x000
@@ -168,10 +168,10 @@ struct tegra_spi_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;
 
@@ -576,15 +576,15 @@ static int tegra_spi_init_dma_param(struct tegra_spi_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,
@@ -595,7 +595,6 @@ static int tegra_spi_init_dma_param(struct tegra_spi_data *tspi,
                return -ENOMEM;
        }
 
-       dma_sconfig.slave_id = tspi->dma_req_sel;
        if (dma_to_memory) {
                dma_sconfig.src_addr = tspi->phys + SPI_RX_FIFO;
                dma_sconfig.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@@ -888,9 +887,9 @@ static irqreturn_t handle_cpu_based_xfer(struct tegra_spi_data *tspi)
                        tspi->status_reg);
                dev_err(tspi->dev, "CpuXfer 0x%08x:0x%08x\n",
                        tspi->command1_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;
        }
@@ -960,9 +959,9 @@ static irqreturn_t handle_dma_based_xfer(struct tegra_spi_data *tspi)
                        tspi->status_reg);
                dev_err(tspi->dev, "DmaXfer 0x%08x:0x%08x\n",
                        tspi->command1_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);
                spin_unlock_irqrestore(&tspi->lock, flags);
                return IRQ_HANDLED;
@@ -1024,11 +1023,6 @@ static void tegra_spi_parse_dt(struct platform_device *pdev,
        struct tegra_spi_data *tspi)
 {
        struct device_node *np = pdev->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))
@@ -1097,25 +1091,25 @@ static int tegra_spi_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 = SPI_FIFO_DEPTH << 2;
        tspi->dma_buf_size = DEFAULT_SPI_DMA_BUF_LEN;
 
-       if (tspi->dma_req_sel) {
-               ret = tegra_spi_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_spi_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_spi_init_dma_param(tspi, true);
+       if (ret < 0)
+               goto exit_free_irq;
+       ret = tegra_spi_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);