X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=target%2Flinux%2Framips%2Fpatches-4.14%2F0043-spi-add-mt7621-support.patch;h=d9bc48d69b0977b1db6e7c1eaec6f0e839ced560;hb=e2aa0c3f8b49f62fc83ec90f0bc5a67560fffa73;hp=bc5418bab2ea814dada0ef48e59047120a4fa046;hpb=f4e5880d0f3496a3151fe24d87ca2d08d3403a83;p=oweals%2Fopenwrt.git

diff --git a/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch b/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
index bc5418bab2..d9bc48d69b 100644
--- a/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
+++ b/target/linux/ramips/patches-4.14/0043-spi-add-mt7621-support.patch
@@ -38,7 +38,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  obj-$(CONFIG_SPI_OC_TINY)		+= spi-oc-tiny.o
 --- /dev/null
 +++ b/drivers/spi/spi-mt7621.c
-@@ -0,0 +1,483 @@
+@@ -0,0 +1,494 @@
 +/*
 + * spi-mt7621.c -- MediaTek MT7621 SPI controller driver
 + *
@@ -106,7 +106,6 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	unsigned int		sys_freq;
 +	unsigned int		speed;
 +	struct clk		*clk;
-+	spinlock_t		lock;
 +
 +	struct mt7621_spi_ops	*ops;
 +};
@@ -132,9 +131,11 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +
 +	master |= 7 << 29;
 +	master |= 1 << 2;
++#ifdef CONFIG_SOC_MT7620
 +	if (duplex)
 +		master |= 1 << 10;
 +	else
++#endif
 +		master &= ~(1 << 10);
 +
 +	mt7621_spi_write(rs, MT7621_SPI_MASTER, master);
@@ -243,10 +244,12 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +		if (t->speed_hz < speed)
 +			speed = t->speed_hz;
 +
-+		if (WARN_ON(len + t->len > 36)) {
-+			status = -EIO;
-+			goto msg_done;
-+		}
++		/*
++		 * m25p80 might attempt to write more data than we can handle.
++		 * truncate the message to what we can fit into the registers
++		 */
++		if (len + t->len > 36)
++			t->len = 36 - len;
 +
 +		for (i = 0; i < t->len; i++, len++)
 +			data[len / 4] |= buf[i] << (8 * (len & 3));
@@ -307,6 +310,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	return 0;
 +}
 +
++#ifdef CONFIG_SOC_MT7620
 +static int mt7621_spi_transfer_full_duplex(struct spi_master *master,
 +					   struct spi_message *m)
 +{
@@ -391,15 +395,18 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +
 +	return 0;
 +}
++#endif
 +
 +static int mt7621_spi_transfer_one_message(struct spi_master *master,
 +					   struct spi_message *m)
 +{
 +	struct spi_device *spi = m->spi;
++#ifdef CONFIG_SOC_MT7620
 +	int cs = spi->chip_select;
 +
 +	if (cs)
 +		return mt7621_spi_transfer_full_duplex(master, m);
++#endif
 +	return mt7621_spi_transfer_half_duplex(master, m);
 +}
 +
@@ -426,12 +433,16 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +};
 +MODULE_DEVICE_TABLE(of, mt7621_spi_match);
 +
++static size_t mt7621_max_transfer_size(struct spi_device *spi)
++{
++	return 32;
++}
++
 +static int mt7621_spi_probe(struct platform_device *pdev)
 +{
 +	const struct of_device_id *match;
 +	struct spi_master *master;
 +	struct mt7621_spi *rs;
-+	unsigned long flags;
 +	void __iomem *base;
 +	struct resource *r;
 +	int status = 0;
@@ -472,6 +483,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	master->bits_per_word_mask = SPI_BPW_MASK(8);
 +	master->dev.of_node = pdev->dev.of_node;
 +	master->num_chipselect = 2;
++	master->max_transfer_size = mt7621_max_transfer_size;
 +
 +	dev_set_drvdata(&pdev->dev, master);
 +
@@ -482,7 +494,6 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
 +	rs->sys_freq = clk_get_rate(rs->clk);
 +	rs->ops = ops;
 +	dev_info(&pdev->dev, "sys_freq: %u\n", rs->sys_freq);
-+	spin_lock_irqsave(&rs->lock, flags);
 +
 +	device_reset(&pdev->dev);
 +