From: Lanqing Liu <lanqing....@unisoc.com>
This patch adds clocks and clocks-names properties, which are used to do
power management for our UART driver.
Reviewed-by: Rob Herring <r...@kernel.org>
Signed-off-by: Lanqing Liu <lanqing....@unisoc.com>
Signed-off-by: Baolin Wang <baolin.w...@linaro.org>
---
.../devicetree/bindings/serial/sprd-uart.txt | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt
b/Documentation/devicetree/bindings/serial/sprd-uart.txt
index cab40f0..6eb5863 100644
--- a/Documentation/devicetree/bindings/serial/sprd-uart.txt
+++ b/Documentation/devicetree/bindings/serial/sprd-uart.txt
@@ -7,7 +7,13 @@ Required properties:
- reg: offset and length of the register set for the device
- interrupts: exactly one interrupt specifier
-- clocks: phandles to input clocks.
+- clock-names: Should contain following entries:
+ "enable" for UART module enable clock,
+ "uart" for UART clock,
+ "source" for UART source (parent) clock.
+- clocks: Should contain a clock specifier for each entry in clock-names.
+ UART clock and source clock are optional properties, but enable clock
+ is required.
Example:
uart0: serial@0 {
@@ -15,5 +21,6 @@ Example:
"sprd,sc9836-uart";
reg = <0x0 0x100>;
interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&ext_26m>;
+ clock-names = "enable", "uart", "source";
+ clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>;
};
--
1.7.9.5
