brcm2708: rename all patches from raspberrypi git tree to use 950 prefix

Right now all brcm2708 patches are extracted from the non-mainline
raspberrypi/linux git tree. Many of them are hacks and/or are unneeded
in LEDE. Raspberry Pi is getting better and better mainline support so
it would be nice to finally start maintaining patches in a cleaner way:
1) Backport patches accepted in upstream tree
2) Start using upstream drivers
3) Pick only these patches that are needed for more complete support

Handling above tasks requires grouping patches - ideally using the same
prefixes as generic ones. It means we should rename existing patches to
use some high prefix. This will allow e.g. use 0xx for backported code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Stijn Tintel <stijn@linux-ipv6.be>

1 files changed, 86 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch b/target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch
new file mode 100644
index 0000000000..2bd501d8db
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch
@@ -0,0 +1,86 @@
+From 0360d687752df3c5546dd1534904a6e0168b6360 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Wed, 1 Mar 2017 16:07:39 +0000
+Subject: [PATCH] amba_pl011: Round input clock up
+
+The UART clock is initialised to be as close to the requested
+frequency as possible without exceeding it. Now that there is a
+clock manager that returns the actual frequencies, an expected
+48MHz clock is reported as 47999625. If the requested baudrate
+== requested clock/16, there is no headroom and the slight
+reduction in actual clock rate results in failure.
+
+Detect cases where it looks like a "round" clock was chosen and
+adjust the reported clock to match that "round" value. As the
+code comment says:
+
+/*
+ * If increasing a clock by less than 0.1% changes it
+ * from ..999.. to ..000.., round up.
+ */
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/tty/serial/amba-pl011.c | 23 +++++++++++++++++++++--
+ 1 file changed, 21 insertions(+), 2 deletions(-)
+
+--- a/drivers/tty/serial/amba-pl011.c
++++ b/drivers/tty/serial/amba-pl011.c
+@@ -1646,6 +1646,23 @@ static void pl011_put_poll_char(struct u
+ 
+ #endif /* CONFIG_CONSOLE_POLL */
+ 
++unsigned long pl011_clk_round(unsigned long clk)
++{
++	unsigned long scaler;
++
++	/*
++	 * If increasing a clock by less than 0.1% changes it
++	 * from ..999.. to ..000.., round up.
++	 */
++	scaler = 1;
++	while (scaler * 100000 < clk)
++		scaler *= 10;
++	if ((clk + scaler - 1)/scaler % 1000 == 0)
++		clk = (clk/scaler + 1) * scaler;
++
++	return clk;
++}
++
+ static int pl011_hwinit(struct uart_port *port)
+ {
+ 	struct uart_amba_port *uap =
+@@ -1662,7 +1679,7 @@ static int pl011_hwinit(struct uart_port
+ 	if (retval)
+ 		return retval;
+ 
+-	uap->port.uartclk = clk_get_rate(uap->clk);
++	uap->port.uartclk = pl011_clk_round(clk_get_rate(uap->clk));
+ 
+ 	/* Clear pending error and receive interrupts */
+ 	pl011_write(UART011_OEIS | UART011_BEIS | UART011_PEIS |
+@@ -2300,7 +2317,7 @@ static int __init pl011_console_setup(st
+ 			plat->init();
+ 	}
+ 
+-	uap->port.uartclk = clk_get_rate(uap->clk);
++	uap->port.uartclk = pl011_clk_round(clk_get_rate(uap->clk));
+ 
+ 	if (uap->vendor->fixed_options) {
+ 		baud = uap->fixed_baud;
+@@ -2372,6 +2389,7 @@ static struct uart_driver amba_reg = {
+ 	.cons			= AMBA_CONSOLE,
+ };
+ 
++#if 0
+ static int pl011_probe_dt_alias(int index, struct device *dev)
+ {
+ 	struct device_node *np;
+@@ -2403,6 +2421,7 @@ static int pl011_probe_dt_alias(int inde
+ 
+ 	return ret;
+ }
++#endif
+ 
+ /* unregisters the driver also if no more ports are left */
+ static void pl011_unregister_port(struct uart_amba_port *uap)