brcm2708: remove linux 4.1 support

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

SVN-Revision: 48766

1 files changed, 0 insertions, 136 deletions

diff --git a/target/linux/brcm2708/patches-4.1/0155-spi-bcm2835-fallback-to-interrupt-for-polling-timeou.patch b/target/linux/brcm2708/patches-4.1/0155-spi-bcm2835-fallback-to-interrupt-for-polling-timeou.patch
deleted file mode 100644
index 01612e53af..0000000000
--- a/target/linux/brcm2708/patches-4.1/0155-spi-bcm2835-fallback-to-interrupt-for-polling-timeou.patch
+++ /dev/null
@@ -1,136 +0,0 @@
-From 4a42130b7fe39652a3ed8ced413a71c7f5d7ce61 Mon Sep 17 00:00:00 2001
-From: Martin Sperl <kernel@martin.sperl.org>
-Date: Wed, 22 Apr 2015 07:33:03 +0000
-Subject: [PATCH 155/222] spi: bcm2835: fallback to interrupt for polling
- timeouts exceeding 2 jiffies
-
-The polling mode of the driver is designed for transfers that run
-less than 30us - it will only execute under those circumstances.
-So it should run comfortably without getting interrupted by the
-scheduler.
-
-But there are situations where the raspberry pi is so overloaded
-that it can take up to 80 jiffies until the polling thread gets
-rescheduled - this has been observed especially under heavy
-IO situations.
-
-In such a situation we now fall back to the interrupt handler and
-log the situation at debug level.
-
-Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
-Signed-off-by: Mark Brown <broonie@kernel.org>
-(cherry picked from commit a750b124cfd27bae1a12df22318db5a2083dfb12)
----
- drivers/spi/spi-bcm2835.c | 87 +++++++++++++++++++++++++++--------------------
- 1 file changed, 50 insertions(+), 37 deletions(-)
-
---- a/drivers/spi/spi-bcm2835.c
-+++ b/drivers/spi/spi-bcm2835.c
-@@ -69,7 +69,7 @@
- #define BCM2835_SPI_CS_CS_01		0x00000001
- 
- #define BCM2835_SPI_POLLING_LIMIT_US	30
--#define BCM2835_SPI_TIMEOUT_MS		30000
-+#define BCM2835_SPI_POLLING_JIFFIES	2
- #define BCM2835_SPI_MODE_BITS	(SPI_CPOL | SPI_CPHA | SPI_CS_HIGH \
- 				| SPI_NO_CS | SPI_3WIRE)
- 
-@@ -157,42 +157,6 @@ static irqreturn_t bcm2835_spi_interrupt
- 	return IRQ_HANDLED;
- }
- 
--static int bcm2835_spi_transfer_one_poll(struct spi_master *master,
--					 struct spi_device *spi,
--					 struct spi_transfer *tfr,
--					 u32 cs,
--					 unsigned long xfer_time_us)
--{
--	struct bcm2835_spi *bs = spi_master_get_devdata(master);
--	/* set timeout to 1 second of maximum polling */
--	unsigned long timeout = jiffies + HZ;
--
--	/* enable HW block without interrupts */
--	bcm2835_wr(bs, BCM2835_SPI_CS, cs | BCM2835_SPI_CS_TA);
--
--	/* loop until finished the transfer */
--	while (bs->rx_len) {
--		/* read from fifo as much as possible */
--		bcm2835_rd_fifo(bs);
--		/* fill in tx fifo as much as possible */
--		bcm2835_wr_fifo(bs);
--		/* if we still expect some data after the read,
--		 * check for a possible timeout
--		 */
--		if (bs->rx_len && time_after(jiffies, timeout)) {
--			/* Transfer complete - reset SPI HW */
--			bcm2835_spi_reset_hw(master);
--			/* and return timeout */
--			return -ETIMEDOUT;
--		}
--	}
--
--	/* Transfer complete - reset SPI HW */
--	bcm2835_spi_reset_hw(master);
--	/* and return without waiting for completion */
--	return 0;
--}
--
- static int bcm2835_spi_transfer_one_irq(struct spi_master *master,
- 					struct spi_device *spi,
- 					struct spi_transfer *tfr,
-@@ -229,6 +193,55 @@ static int bcm2835_spi_transfer_one_irq(
- 	return 1;
- }
- 
-+static int bcm2835_spi_transfer_one_poll(struct spi_master *master,
-+					 struct spi_device *spi,
-+					 struct spi_transfer *tfr,
-+					 u32 cs,
-+					 unsigned long xfer_time_us)
-+{
-+	struct bcm2835_spi *bs = spi_master_get_devdata(master);
-+	unsigned long timeout;
-+
-+	/* enable HW block without interrupts */
-+	bcm2835_wr(bs, BCM2835_SPI_CS, cs | BCM2835_SPI_CS_TA);
-+
-+	/* fill in the fifo before timeout calculations
-+	 * if we are interrupted here, then the data is
-+	 * getting transferred by the HW while we are interrupted
-+	 */
-+	bcm2835_wr_fifo(bs);
-+
-+	/* set the timeout */
-+	timeout = jiffies + BCM2835_SPI_POLLING_JIFFIES;
-+
-+	/* loop until finished the transfer */
-+	while (bs->rx_len) {
-+		/* fill in tx fifo with remaining data */
-+		bcm2835_wr_fifo(bs);
-+
-+		/* read from fifo as much as possible */
-+		bcm2835_rd_fifo(bs);
-+
-+		/* if there is still data pending to read
-+		 * then check the timeout
-+		 */
-+		if (bs->rx_len && time_after(jiffies, timeout)) {
-+			dev_dbg_ratelimited(&spi->dev,
-+					    "timeout period reached: jiffies: %lu remaining tx/rx: %d/%d - falling back to interrupt mode\n",
-+					    jiffies - timeout,
-+					    bs->tx_len, bs->rx_len);
-+			/* fall back to interrupt mode */
-+			return bcm2835_spi_transfer_one_irq(master, spi,
-+							    tfr, cs);
-+		}
-+	}
-+
-+	/* Transfer complete - reset SPI HW */
-+	bcm2835_spi_reset_hw(master);
-+	/* and return without waiting for completion */
-+	return 0;
-+}
-+
- static int bcm2835_spi_transfer_one(struct spi_master *master,
- 				    struct spi_device *spi,
- 				    struct spi_transfer *tfr)