Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bcm2835', 'spi/fix/doc'...

[linux-drm-fsl-dcu.git] / drivers / spi / spi-mt65xx.c

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 5f6315c47920efcb42dc52b5c93c26ce60cb7de4..ecb6c58238c4f56867e73e3f074ddf90f1b04ee3 100644 (file)
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -85,7 +85,7 @@ struct mtk_spi {
        void __iomem *base;
        u32 state;
        u32 pad_sel;
-       struct clk *spi_clk, *parent_clk;
+       struct clk *parent_clk, *sel_clk, *spi_clk;
        struct spi_transfer *cur_transfer;
        u32 xfer_len;
        struct scatterlist *tx_sgl, *rx_sgl;
@@ -173,22 +173,6 @@ static void mtk_spi_config(struct mtk_spi *mdata,
                writel(mdata->pad_sel, mdata->base + SPI_PAD_SEL_REG);
 }
 
-static int mtk_spi_prepare_hardware(struct spi_master *master)
-{
-       struct spi_transfer *trans;
-       struct mtk_spi *mdata = spi_master_get_devdata(master);
-       struct spi_message *msg = master->cur_msg;
-
-       trans = list_first_entry(&msg->transfers, struct spi_transfer,
-                                transfer_list);
-       if (!trans->cs_change) {
-               mdata->state = MTK_SPI_IDLE;
-               mtk_spi_reset(mdata);
-       }
-
-       return 0;
-}
-
 static int mtk_spi_prepare_message(struct spi_master *master,
                                   struct spi_message *msg)
 {
@@ -228,11 +212,15 @@ static void mtk_spi_set_cs(struct spi_device *spi, bool enable)
        struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
 
        reg_val = readl(mdata->base + SPI_CMD_REG);
-       if (!enable)
+       if (!enable) {
                reg_val |= SPI_CMD_PAUSE_EN;
-       else
+               writel(reg_val, mdata->base + SPI_CMD_REG);
+       } else {
                reg_val &= ~SPI_CMD_PAUSE_EN;
-       writel(reg_val, mdata->base + SPI_CMD_REG);
+               writel(reg_val, mdata->base + SPI_CMD_REG);
+               mdata->state = MTK_SPI_IDLE;
+               mtk_spi_reset(mdata);
+       }
 }
 
 static void mtk_spi_prepare_transfer(struct spi_master *master,
@@ -509,7 +497,6 @@ static int mtk_spi_probe(struct platform_device *pdev)
        master->mode_bits = SPI_CPOL | SPI_CPHA;
 
        master->set_cs = mtk_spi_set_cs;
-       master->prepare_transfer_hardware = mtk_spi_prepare_hardware;
        master->prepare_message = mtk_spi_prepare_message;
        master->transfer_one = mtk_spi_transfer_one;
        master->can_dma = mtk_spi_can_dma;
@@ -576,13 +563,6 @@ static int mtk_spi_probe(struct platform_device *pdev)
                goto err_put_master;
        }
 
-       mdata->spi_clk = devm_clk_get(&pdev->dev, "spi-clk");
-       if (IS_ERR(mdata->spi_clk)) {
-               ret = PTR_ERR(mdata->spi_clk);
-               dev_err(&pdev->dev, "failed to get spi-clk: %d\n", ret);
-               goto err_put_master;
-       }
-
        mdata->parent_clk = devm_clk_get(&pdev->dev, "parent-clk");
        if (IS_ERR(mdata->parent_clk)) {
                ret = PTR_ERR(mdata->parent_clk);
@@ -590,13 +570,27 @@ static int mtk_spi_probe(struct platform_device *pdev)
                goto err_put_master;
        }
 
+       mdata->sel_clk = devm_clk_get(&pdev->dev, "sel-clk");
+       if (IS_ERR(mdata->sel_clk)) {
+               ret = PTR_ERR(mdata->sel_clk);
+               dev_err(&pdev->dev, "failed to get sel-clk: %d\n", ret);
+               goto err_put_master;
+       }
+
+       mdata->spi_clk = devm_clk_get(&pdev->dev, "spi-clk");
+       if (IS_ERR(mdata->spi_clk)) {
+               ret = PTR_ERR(mdata->spi_clk);
+               dev_err(&pdev->dev, "failed to get spi-clk: %d\n", ret);
+               goto err_put_master;
+       }
+
        ret = clk_prepare_enable(mdata->spi_clk);
        if (ret < 0) {
                dev_err(&pdev->dev, "failed to enable spi_clk (%d)\n", ret);
                goto err_put_master;
        }
 
-       ret = clk_set_parent(mdata->spi_clk, mdata->parent_clk);
+       ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
        if (ret < 0) {
                dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
                goto err_disable_clk;
@@ -630,7 +624,6 @@ static int mtk_spi_remove(struct platform_device *pdev)
        pm_runtime_disable(&pdev->dev);
 
        mtk_spi_reset(mdata);
-       clk_disable_unprepare(mdata->spi_clk);
        spi_master_put(master);
 
        return 0;