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authorStijn Tintel <stijn@linux-ipv6.be>2019-02-02 21:53:15 +0100
committerStijn Tintel <stijn@linux-ipv6.be>2019-02-06 07:39:39 +0200
commitc30f7f402f1be7a7917b3dd604ee32be8ed20716 (patch)
treec858e61a864a9409408cf3eb58b7e8800112c2e6 /target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch
parent12310f05b7b080b016ec515796be437f4cd30b62 (diff)
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brcm2708: drop 4.9 support
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch')
-rw-r--r--target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch86
1 files changed, 0 insertions, 86 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
deleted file mode 100644
index ad532c511d..0000000000
--- a/target/linux/brcm2708/patches-4.9/950-0195-amba_pl011-Round-input-clock-up.patch
+++ /dev/null
@@ -1,86 +0,0 @@
-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
-@@ -1651,6 +1651,23 @@ 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 =
-@@ -1667,7 +1684,7 @@ 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 |
-@@ -2321,7 +2338,7 @@ 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;
-@@ -2448,6 +2465,7 @@ 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;
-@@ -2479,6 +2497,7 @@ 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)