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Message-Id: <a94e3b123773fe303221d2bd2e4ce36ffa905a1c.1644198957.git.lhjeff911@gmail.com>
Date: Mon, 7 Feb 2022 09:57:22 +0800
From: Li-hao Kuo <lhjeff911@...il.com>
To: broonie@...nel.org, linux-spi@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: wells.lu@...plus.com, lh.kuo@...plus.com,
Li-hao Kuo <lhjeff911@...il.com>
Subject: [PATCH next] spi: Modify irq request position and modify parameters
- Change irq request position to the back.
- Add temporary varilable and setting (as suggested by Mr. Andy Shevchenko)
Fixes: f62ca4e2a863 ("spi: Add spi driver for Sunplus SP7021")
Signed-off-by: Li-hao Kuo <lhjeff911@...il.com>
---
drivers/spi/spi-sunplus-sp7021.c | 63 ++++++++++++++++++++--------------------
1 file changed, 31 insertions(+), 32 deletions(-)
diff --git a/drivers/spi/spi-sunplus-sp7021.c b/drivers/spi/spi-sunplus-sp7021.c
index e5bdeb3..ba5ed9f 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) {
--
2.7.4
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