diff options
Diffstat (limited to 'drivers/spi')
-rw-r--r-- | drivers/spi/spi-sunplus-sp7021.c | 63 |
1 files changed, 31 insertions, 32 deletions
diff --git a/drivers/spi/spi-sunplus-sp7021.c b/drivers/spi/spi-sunplus-sp7021.c index e5bdeb3eba45..ba5ed9f7277a 100644 --- a/drivers/spi/spi-sunplus-sp7021.c +++ b/drivers/spi/spi-sunplus-sp7021.c @@ -110,7 +110,8 @@ static irqreturn_t sp7021_spi_slave_irq(int irq, void *dev) unsigned int data_status; data_status = readl(pspim->s_base + SP7021_DATA_RDY_REG); - writel(data_status | SP7021_SLAVE_CLR_INT, pspim->s_base + SP7021_DATA_RDY_REG); + data_status |= SP7021_SLAVE_CLR_INT; + writel(data_status , pspim->s_base + SP7021_DATA_RDY_REG); complete(&pspim->slave_isr); return IRQ_HANDLED; } @@ -127,14 +128,16 @@ static int sp7021_spi_slave_abort(struct spi_controller *ctlr) static int sp7021_spi_slave_tx(struct spi_device *spi, struct spi_transfer *xfer) { struct sp7021_spi_ctlr *pspim = spi_controller_get_devdata(spi->controller); + u32 value; reinit_completion(&pspim->slave_isr); - writel(SP7021_SLAVE_DMA_EN | SP7021_SLAVE_DMA_RW | FIELD_PREP(SP7021_SLAVE_DMA_CMD, 3), - pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); + value = SP7021_SLAVE_DMA_EN | SP7021_SLAVE_DMA_RW | FIELD_PREP(SP7021_SLAVE_DMA_CMD, 3); + writel(value, pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); writel(xfer->len, pspim->s_base + SP7021_SLAVE_DMA_LENGTH_REG); writel(xfer->tx_dma, pspim->s_base + SP7021_SLAVE_DMA_ADDR_REG); - writel(readl(pspim->s_base + SP7021_DATA_RDY_REG) | SP7021_SLAVE_DATA_RDY, - pspim->s_base + SP7021_DATA_RDY_REG); + value = readl(pspim->s_base + SP7021_DATA_RDY_REG); + value |= SP7021_SLAVE_DATA_RDY; + writel(value, pspim->s_base + SP7021_DATA_RDY_REG); if (wait_for_completion_interruptible(&pspim->isr_done)) { dev_err(&spi->dev, "%s() wait_for_completion err\n", __func__); return -EINTR; @@ -145,11 +148,11 @@ static int sp7021_spi_slave_tx(struct spi_device *spi, struct spi_transfer *xfer static int sp7021_spi_slave_rx(struct spi_device *spi, struct spi_transfer *xfer) { struct sp7021_spi_ctlr *pspim = spi_controller_get_devdata(spi->controller); - int ret = 0; + u32 value; reinit_completion(&pspim->isr_done); - writel(SP7021_SLAVE_DMA_EN | FIELD_PREP(SP7021_SLAVE_DMA_CMD, 3), - pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); + value = SP7021_SLAVE_DMA_EN | FIELD_PREP(SP7021_SLAVE_DMA_CMD, 3); + writel(value, pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); writel(xfer->len, pspim->s_base + SP7021_SLAVE_DMA_LENGTH_REG); writel(xfer->rx_dma, pspim->s_base + SP7021_SLAVE_DMA_ADDR_REG); if (wait_for_completion_interruptible(&pspim->isr_done)) { @@ -157,7 +160,7 @@ static int sp7021_spi_slave_rx(struct spi_device *spi, struct spi_transfer *xfer return -EINTR; } writel(SP7021_SLAVE_SW_RST, pspim->s_base + SP7021_SLAVE_DMA_CTRL_REG); - return ret; + return 0; } static void sp7021_spi_master_rb(struct sp7021_spi_ctlr *pspim, unsigned int len) @@ -188,7 +191,6 @@ static irqreturn_t sp7021_spi_master_irq(int irq, void *dev) unsigned int tx_cnt, total_len; unsigned int tx_len, rx_cnt; unsigned int fd_status; - unsigned long flags; bool isrdone = false; u32 value; @@ -203,7 +205,7 @@ static irqreturn_t sp7021_spi_master_irq(int irq, void *dev) if (tx_len == 0 && total_len == 0) return IRQ_NONE; - spin_lock_irqsave(&pspim->lock, flags); + spin_lock_irq(&pspim->lock); rx_cnt = FIELD_GET(SP7021_RX_CNT_MASK, fd_status); if (fd_status & SP7021_RX_FULL_FLAG) @@ -243,7 +245,7 @@ static irqreturn_t sp7021_spi_master_irq(int irq, void *dev) if (isrdone) complete(&pspim->isr_done); - spin_unlock_irqrestore(&pspim->lock, flags); + spin_unlock_irq(&pspim->lock); return IRQ_HANDLED; } @@ -296,11 +298,10 @@ static void sp7021_spi_setup_clk(struct spi_controller *ctlr, struct spi_transfe u32 clk_rate, clk_sel, div; clk_rate = clk_get_rate(pspim->spi_clk); - div = clk_rate / xfer->speed_hz; - if (div < 2) - div = 2; + div = max(2U, clk_rate / xfer->speed_hz); + clk_sel = (div / 2) - 1; - pspim->xfer_conf &= SP7021_CLK_MASK; + pspim->xfer_conf &= ~SP7021_CLK_MASK; pspim->xfer_conf |= FIELD_PREP(SP7021_CLK_MASK, clk_sel); writel(pspim->xfer_conf, pspim->m_base + SP7021_SPI_CONFIG_REG); } @@ -313,7 +314,6 @@ static int sp7021_spi_master_transfer_one(struct spi_controller *ctlr, struct sp unsigned int xfer_cnt, xfer_len, last_len; unsigned int i, len_temp; u32 reg_temp; - int ret; xfer_cnt = xfer->len / SP7021_SPI_DATA_SIZE; last_len = xfer->len % SP7021_SPI_DATA_SIZE; @@ -366,9 +366,8 @@ static int sp7021_spi_master_transfer_one(struct spi_controller *ctlr, struct sp writel(pspim->xfer_conf, pspim->m_base + SP7021_SPI_CONFIG_REG); mutex_unlock(&pspim->buf_lock); - ret = 0; } - return ret; + return 0; } static int sp7021_spi_slave_transfer_one(struct spi_controller *ctlr, struct spi_device *spi, @@ -376,12 +375,12 @@ static int sp7021_spi_slave_transfer_one(struct spi_controller *ctlr, struct spi { struct sp7021_spi_ctlr *pspim = spi_master_get_devdata(ctlr); struct device *dev = pspim->dev; - int mode, ret = 0; + int mode, ret; mode = SP7021_SPI_IDLE; if (xfer->tx_buf && xfer->rx_buf) { dev_dbg(&ctlr->dev, "%s() wrong command\n", __func__); - ret = -EINVAL; + return -EINVAL; } else if (xfer->tx_buf) { xfer->tx_dma = dma_map_single(dev, (void *)xfer->tx_buf, xfer->len, DMA_TO_DEVICE); @@ -445,7 +444,7 @@ static int sp7021_spi_controller_probe(struct platform_device *pdev) ctlr = devm_spi_alloc_master(dev, sizeof(*pspim)); if (!ctlr) return -ENOMEM; - device_set_node(&ctlr->dev, pdev->dev.fwnode); + device_set_node(&ctlr->dev, dev_fwnode(dev)); ctlr->bus_num = pdev->id; ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST; ctlr->auto_runtime_pm = true; @@ -488,16 +487,6 @@ static int sp7021_spi_controller_probe(struct platform_device *pdev) if (pspim->s_irq < 0) return pspim->s_irq; - ret = devm_request_irq(dev, pspim->m_irq, sp7021_spi_master_irq, - IRQF_TRIGGER_RISING, pdev->name, pspim); - if (ret) - return ret; - - ret = devm_request_irq(dev, pspim->s_irq, sp7021_spi_slave_irq, - IRQF_TRIGGER_RISING, pdev->name, pspim); - if (ret) - return ret; - pspim->spi_clk = devm_clk_get(dev, NULL); if (IS_ERR(pspim->spi_clk)) return dev_err_probe(dev, PTR_ERR(pspim->spi_clk), "clk get fail\n"); @@ -522,6 +511,16 @@ static int sp7021_spi_controller_probe(struct platform_device *pdev) if (ret) return ret; + ret = devm_request_irq(dev, pspim->m_irq, sp7021_spi_master_irq, + IRQF_TRIGGER_RISING, pdev->name, pspim); + if (ret) + return ret; + + ret = devm_request_irq(dev, pspim->s_irq, sp7021_spi_slave_irq, + IRQF_TRIGGER_RISING, pdev->name, pspim); + if (ret) + return ret; + pm_runtime_enable(dev); ret = spi_register_controller(ctlr); if (ret) { |