brcm63xx: add kernel 4.9 support

Add support for kernel 4.9 based on the more upstream comformant
partition defintions. Increases compressed kernel size by ~95k
compared to 4.4.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-4.9/001-4.12-01-spi-bcm63xx-make-spi-subsystem-aware-of-message-size.patch b/target/linux/brcm63xx/patches-4.9/001-4.12-01-spi-bcm63xx-make-spi-subsystem-aware-of-message-size.patch
new file mode 100644
index 0000000000..f049af0d82
--- /dev/null
+++ b/target/linux/brcm63xx/patches-4.9/001-4.12-01-spi-bcm63xx-make-spi-subsystem-aware-of-message-size.patch
@@ -0,0 +1,42 @@
+From 3fcc36962c32ad0af2d5904103e2b2b824b6b1aa Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Sat, 4 Feb 2017 12:32:59 +0100
+Subject: [PATCH 2/8] spi/bcm63xx: make spi subsystem aware of message size
+ limits
+
+The bcm63xx LS SPI controller does not allow manual control of the CS
+lines and will toggle it automatically before after sending data, so we
+are limited to messages that fit in the FIFO buffer. Since the CS lines
+aren't available as GPIOs either, we will need to make slave drivers
+aware of this limitation and handle it accordingly.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/spi/spi-bcm63xx.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+--- a/drivers/spi/spi-bcm63xx.c
++++ b/drivers/spi/spi-bcm63xx.c
+@@ -428,6 +428,13 @@ static irqreturn_t bcm63xx_spi_interrupt
+ 	return IRQ_HANDLED;
+ }
+ 
++static size_t bcm63xx_spi_max_length(struct spi_device *spi)
++{
++	struct bcm63xx_spi *bs = spi_master_get_devdata(spi->master);
++
++	return bs->fifo_size;
++}
++
+ static const unsigned long bcm6348_spi_reg_offsets[] = {
+ 	[SPI_CMD]		= SPI_6348_CMD,
+ 	[SPI_INT_STATUS]	= SPI_6348_INT_STATUS,
+@@ -541,6 +548,8 @@ static int bcm63xx_spi_probe(struct plat
+ 	master->transfer_one_message = bcm63xx_spi_transfer_one;
+ 	master->mode_bits = MODEBITS;
+ 	master->bits_per_word_mask = SPI_BPW_MASK(8);
++	master->max_transfer_size = bcm63xx_spi_max_length;
++	master->max_message_size = bcm63xx_spi_max_length;
+ 	master->auto_runtime_pm = true;
+ 	bs->msg_type_shift = bs->reg_offsets[SPI_MSG_TYPE_SHIFT];
+ 	bs->msg_ctl_width = bs->reg_offsets[SPI_MSG_CTL_WIDTH];