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dt-bindings: watchdog: Consolidate SP805 binding docs

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Consolidate two SP805 binding documents "arm,sp805.txt" and
"sp805-wdt.txt" into "arm,sp805.txt" that matches the naming of the
desired compatible string to be used

Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Ray Jui 2018-05-28 11:01:32 -07:00 committed by Wim Van Sebroeck
parent 2421cfd55a
commit fb18d30f86
2 changed files with 20 additions and 38 deletions
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27
Documentation/devicetree/bindings/watchdog/arm,sp805.txt
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@ -1,17 +1,30 @@
ARM AMBA Primecell SP805 Watchdog
SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
can be used to identify the peripheral type, vendor, and revision.
This value can be used for driver matching.
As SP805 WDT is a primecell IP, it follows the base bindings specified in
'arm/primecell.txt'
Required properties:
- compatible: Should be "arm,sp805" & "arm,primecell"
- reg: Should contain location and length for watchdog timer register.
- interrupts: Should contain the list of watchdog timer interrupts.
- clocks: clocks driving the watchdog timer hardware. This list should be 2
clocks. With 2 clocks, the order is wdogclk clock, apb_pclk.
- compatible: Should be "arm,sp805" & "arm,primecell"
- reg: Should contain location and length for watchdog timer register
- clocks: Clocks driving the watchdog timer hardware. This list should be
2 clocks. With 2 clocks, the order is wdog_clk, apb_pclk
wdog_clk can be equal to or be a sub-multiple of the apb_pclk
frequency
- clock-names: Shall be "wdog_clk" for first clock and "apb_pclk" for the
second one
Optional properties:
- interrupts: Should specify WDT interrupt number
Example:
watchdog@66090000 {
compatible = "arm,sp805", "arm,primecell";
reg = <0x66090000 0x1000>;
interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&apb_pclk>,<&apb_pclk>;
clock-names = "wdogclk", "apb_pclk";
clocks = <&wdt_clk>, <&apb_pclk>;
clock-names = "wdog_clk", "apb_pclk";
};

31
Documentation/devicetree/bindings/watchdog/sp805-wdt.txt
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@ -1,31 +0,0 @@
* ARM SP805 Watchdog Timer (WDT) Controller
SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
can be used to identify the peripheral type, vendor, and revision.
This value can be used for driver matching.
As SP805 WDT is a primecell IP, it follows the base bindings specified in
'arm/primecell.txt'
Required properties:
- compatible : Should be "arm,sp805-wdt", "arm,primecell"
- reg : Base address and size of the watchdog timer registers.
- clocks : From common clock binding.
First clock is PCLK and the second is WDOGCLK.
WDOGCLK can be equal to or be a sub-multiple of the PCLK frequency.
- clock-names : From common clock binding.
Shall be "apb_pclk" for first clock and "wdog_clk" for the
second one.
Optional properties:
- interrupts : Should specify WDT interrupt number.
Examples:
cluster1_core0_watchdog: wdt@c000000 {
compatible = "arm,sp805-wdt", "arm,primecell";
reg = <0x0 0xc000000 0x0 0x1000>;
clocks = <&clockgen 4 3>, <&clockgen 4 3>;
clock-names = "apb_pclk", "wdog_clk";
};