diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0178-BCM270X_DT-Use-fixed-factor-clock-for-uart1.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0178-BCM270X_DT-Use-fixed-factor-clock-for-uart1.patch | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0178-BCM270X_DT-Use-fixed-factor-clock-for-uart1.patch b/target/linux/brcm2708/patches-4.1/0178-BCM270X_DT-Use-fixed-factor-clock-for-uart1.patch deleted file mode 100644 index f8247591ed..0000000000 --- a/target/linux/brcm2708/patches-4.1/0178-BCM270X_DT-Use-fixed-factor-clock-for-uart1.patch +++ /dev/null @@ -1,92 +0,0 @@ -From 72ab78d0e2048e9563179e530b315f0074b923c4 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Fri, 11 Sep 2015 09:14:01 +0100 -Subject: [PATCH 178/222] BCM270X_DT: Use fixed-factor-clock for uart1 - -The BCM2835 mini-UART is almost 8250-compatible, but there is -a factor-of-two difference in the clock divider for the baud rate. -The standard 8250 driver can be used unmodified provided we lie to it -about the clock frequency, pretending it is double the actual value. -The mini-UART block shares the core clock, and the current firmware -uses a DT-parameter to update the clock-frequency property. Although it -works, this isn't ideal because it exposes the firmware to a driver -problem. - -This patch uses the fixed-factor-clock module to create a clock that is -always twice the frequency of the core clock. (N.B. These "fixed" clocks -just describe an existing clock, rather than changing any hardware -settings.) ---- - arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 1 - - arch/arm/boot/dts/bcm2708-rpi-b.dts | 1 - - arch/arm/boot/dts/bcm2708-rpi-cm.dts | 1 - - arch/arm/boot/dts/bcm2708_common.dtsi | 10 +++++++++- - arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 1 - - 5 files changed, 9 insertions(+), 5 deletions(-) - ---- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts -+++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts -@@ -103,7 +103,6 @@ - __overrides__ { - uart0 = <&uart0>,"status"; - uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; -- uart1_clkrate = <&uart1>,"clock-frequency:0"; - i2s = <&i2s>,"status"; - spi = <&spi0>,"status"; - i2c0 = <&i2c0>,"status"; ---- a/arch/arm/boot/dts/bcm2708-rpi-b.dts -+++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts -@@ -97,7 +97,6 @@ - __overrides__ { - uart0 = <&uart0>,"status"; - uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; -- uart1_clkrate = <&uart1>,"clock-frequency:0"; - i2s = <&i2s>,"status"; - spi = <&spi0>,"status"; - i2c0 = <&i2c0>,"status"; ---- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts -+++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts -@@ -79,7 +79,6 @@ - __overrides__ { - uart0 = <&uart0>,"status"; - uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; -- uart1_clkrate = <&uart1>,"clock-frequency:0"; - i2s = <&i2s>,"status"; - spi = <&spi0>,"status"; - i2c0 = <&i2c0>,"status"; ---- a/arch/arm/boot/dts/bcm2708_common.dtsi -+++ b/arch/arm/boot/dts/bcm2708_common.dtsi -@@ -165,7 +165,7 @@ - compatible = "brcm,bcm2835-aux-uart", "ns16550"; - reg = <0x7e215040 0x40>; - interrupts = <1 29>; -- clock-frequency = <500000000>; -+ clocks = <&clk_uart1>; - reg-shift = <2>; - no-loopback-test; - status = "disabled"; -@@ -294,6 +294,14 @@ - clock-output-names = "pwm"; - clock-frequency = <100000000>; - }; -+ -+ clk_uart1: clock@6 { -+ compatible = "fixed-factor-clock"; -+ clocks = <&clk_core>; -+ #clock-cells = <0>; -+ clock-div = <1>; -+ clock-mult = <2>; -+ }; - }; - - __overrides__ { ---- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts -+++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts -@@ -103,7 +103,6 @@ - __overrides__ { - uart0 = <&uart0>,"status"; - uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; -- uart1_clkrate = <&uart1>,"clock-frequency:0"; - i2s = <&i2s>,"status"; - spi = <&spi0>,"status"; - i2c0 = <&i2c0>,"status"; |