brcm2708: update to latest patches from RPi foundation

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

1 files changed, 47 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0726-can-mcp251x-Allow-more-time-after-a-reset.patch b/target/linux/brcm2708/patches-4.19/950-0726-can-mcp251x-Allow-more-time-after-a-reset.patch
new file mode 100644
index 0000000000..51acc637be
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0726-can-mcp251x-Allow-more-time-after-a-reset.patch
@@ -0,0 +1,47 @@
+From c3fc29179a4dbbd9efa90fb462ef5aac7507ec1a Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Thu, 1 Aug 2019 08:58:48 +0100
+Subject: [PATCH 726/782] can: mcp251x: Allow more time after a reset
+
+Some boards take longer than 5ms to power up after a reset, so allow
+a few retry attempts before giving up.
+
+See: https://github.com/raspberrypi/linux/issues/2767
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/net/can/spi/mcp251x.c | 15 ++++++++++++---
+ 1 file changed, 12 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/can/spi/mcp251x.c
++++ b/drivers/net/can/spi/mcp251x.c
+@@ -628,6 +628,7 @@ static int mcp251x_hw_reset(struct spi_d
+ 	struct mcp251x_priv *priv = spi_get_drvdata(spi);
+ 	u8 reg;
+ 	int ret;
++	int retries = 10;
+ 
+ 	/* Wait for oscillator startup timer after power up */
+ 	mdelay(MCP251X_OST_DELAY_MS);
+@@ -637,10 +638,18 @@ static int mcp251x_hw_reset(struct spi_d
+ 	if (ret)
+ 		return ret;
+ 
+-	/* Wait for oscillator startup timer after reset */
+-	mdelay(MCP251X_OST_DELAY_MS);
++	/*
++	 * Wait for oscillator startup timer after reset
++	 *
++	 * Some devices can take longer than the expected 5ms to wake
++	 * up, so allow a few retries.
++	 */
++
++	do {
++		mdelay(MCP251X_OST_DELAY_MS);
++		reg = mcp251x_read_reg(spi, CANSTAT);
++	} while (!reg && retries--);
+ 
+-	reg = mcp251x_read_reg(spi, CANSTAT);
+ 	if ((reg & CANCTRL_REQOP_MASK) != CANCTRL_REQOP_CONF)
+ 		return -ENODEV;
+