diff options
Diffstat (limited to 'drivers/spi/spi-tegra114.c')
| -rw-r--r-- | drivers/spi/spi-tegra114.c | 66 |
1 files changed, 30 insertions, 36 deletions
diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c index aaecfb3ebf58..c8604981a058 100644 --- 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 @@ -174,10 +174,10 @@ 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; @@ -600,15 +600,15 @@ 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, @@ -619,7 +619,6 @@ 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; @@ -918,9 +917,9 @@ 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; } @@ -990,9 +989,9 @@ 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; @@ -1054,11 +1053,6 @@ 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)) @@ -1127,25 +1121,25 @@ 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); |