Merge tag 'spi-fix-v6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A relatively large batch of fixes here but all device specific, plus
  an update to MAINTAINERS.

  The summary print change to the STM32 driver is fixing an issue where
  the driver could easily end up spamming the logs with something that
  should be a debug message"

* tag 'spi-fix-v6.1-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: amd: Fix SPI_SPD7 value
  spi: stm32: fix stm32_spi_prepare_mbr() that halves spi clk for every run
  spi: meson-spicc: fix do_div build error on non-arm64
  spi: intel: Use correct mask for flash and protected regions
  spi: mediatek: Fix package division error
  spi: tegra210-quad: Don't initialise DMA if not supported
  MAINTAINERS: Update HiSilicon SFC Driver maintainer
  spi: meson-spicc: move wait completion in driver to take bursts delay in account
  spi: stm32: Print summary 'callbacks suppressed' message

1 files changed, 22 insertions, 2 deletions

diff --git a/drivers/spi/spi-meson-spicc.c b/drivers/spi/spi-meson-spicc.c
index bad201510a99..1b4195c54ee2 100644
--- a/drivers/spi/spi-meson-spicc.c
+++ b/drivers/spi/spi-meson-spicc.c
@@ -160,6 +160,7 @@ struct meson_spicc_device {
 	struct clk			*clk;
 	struct spi_message		*message;
 	struct spi_transfer		*xfer;
+	struct completion		done;
 	const struct meson_spicc_data	*data;
 	u8				*tx_buf;
 	u8				*rx_buf;
@@ -282,7 +283,7 @@ static irqreturn_t meson_spicc_irq(int irq, void *data)
 		/* Disable all IRQs */
 		writel(0, spicc->base + SPICC_INTREG);
 
-		spi_finalize_current_transfer(spicc->master);
+		complete(&spicc->done);
 
 		return IRQ_HANDLED;
 	}
@@ -386,6 +387,7 @@ static int meson_spicc_transfer_one(struct spi_master *master,
 				    struct spi_transfer *xfer)
 {
 	struct meson_spicc_device *spicc = spi_master_get_devdata(master);
+	uint64_t timeout;
 
 	/* Store current transfer */
 	spicc->xfer = xfer;
@@ -410,13 +412,29 @@ static int meson_spicc_transfer_one(struct spi_master *master,
 	/* Setup burst */
 	meson_spicc_setup_burst(spicc);
 
+	/* Setup wait for completion */
+	reinit_completion(&spicc->done);
+
+	/* For each byte we wait for 8 cycles of the SPI clock */
+	timeout = 8LL * MSEC_PER_SEC * xfer->len;
+	do_div(timeout, xfer->speed_hz);
+
+	/* Add 10us delay between each fifo bursts */
+	timeout += ((xfer->len >> 4) * 10) / MSEC_PER_SEC;
+
+	/* Increase it twice and add 200 ms tolerance */
+	timeout += timeout + 200;
+
 	/* Start burst */
 	writel_bits_relaxed(SPICC_XCH, SPICC_XCH, spicc->base + SPICC_CONREG);
 
 	/* Enable interrupts */
 	writel_relaxed(SPICC_TC_EN, spicc->base + SPICC_INTREG);
 
-	return 1;
+	if (!wait_for_completion_timeout(&spicc->done, msecs_to_jiffies(timeout)))
+		return -ETIMEDOUT;
+
+	return 0;
 }
 
 static int meson_spicc_prepare_message(struct spi_master *master,
@@ -743,6 +761,8 @@ static int meson_spicc_probe(struct platform_device *pdev)
 	spicc->pdev = pdev;
 	platform_set_drvdata(pdev, spicc);
 
+	init_completion(&spicc->done);
+
 	spicc->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(spicc->base)) {
 		dev_err(&pdev->dev, "io resource mapping failed\n");