shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 19:08:57 +09:00
Code Issues Packages Projects Releases Wiki Activity

spi: rockchip: Disable local irq when pio write out of interrupt service

Browse Source 
Avoid interrupt come and interrupt the pio_writer.

Change-Id: I39047937adeb7f56ada97df92b0188b75182b216
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
This commit is contained in:
Jon Lin
2022-06-01 20:40:01 +08:00
committed by Tao Huang
parent 0b183142c7
commit 8e82d2fc9f
1 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/spi/spi-rockchip.c
View File

@@ -200,6 +200,7 @@ struct rockchip_spi {
bool slave_abort;
bool cs_inactive; /* spi slave tansmition stop when cs inactive */
struct spi_transfer *xfer; /* Store xfer temporarily */
spinlock_t lock; /* prevent I/O concurrent access */
};
static inline void spi_enable_chip(struct rockchip_spi *rs, bool enable)
@@ -294,9 +295,13 @@ static void rockchip_spi_handle_err(struct spi_controller *ctlr,
static void rockchip_spi_pio_writer(struct rockchip_spi *rs)
{
u32 tx_free = rs->fifo_len - readl_relaxed(rs->regs + ROCKCHIP_SPI_TXFLR);
u32 words = min(rs->tx_left, tx_free);
u32 tx_free;
u32 words;
unsigned long flags;
spin_lock_irqsave(&rs->lock, flags);
tx_free = rs->fifo_len - readl_relaxed(rs->regs + ROCKCHIP_SPI_TXFLR);
words = min(rs->tx_left, tx_free);
rs->tx_left -= words;
for (; words; words--) {
u32 txw;
@@ -309,6 +314,7 @@ static void rockchip_spi_pio_writer(struct rockchip_spi *rs)
writel_relaxed(txw, rs->regs + ROCKCHIP_SPI_TXDR);
rs->tx += rs->n_bytes;
}
spin_unlock_irqrestore(&rs->lock, flags);
}
static void rockchip_spi_pio_reader(struct rockchip_spi *rs)
@@ -787,6 +793,8 @@ static int rockchip_spi_probe(struct platform_device *pdev)
goto err_put_ctlr;
}
spin_lock_init(&rs->lock);
rs->apb_pclk = devm_clk_get(&pdev->dev, "apb_pclk");
if (IS_ERR(rs->apb_pclk)) {
dev_err(&pdev->dev, "Failed to get apb_pclk\n");