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| author | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-07-31 12:43:12 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2015-10-01 22:48:11 +0300 |
| commit | df70aeef60839cb2732913fa41e61aba52ca942c (patch) | |
| tree | 1c8495a4d17d87ca468f2539c4f4a01dca162a34 /Documentation/devicetree/bindings/clock | |
| parent | a5752e57bb63154fe9202d8d2282bad3bae3bced (diff) | |
| download | linux-df70aeef60839cb2732913fa41e61aba52ca942c.tar.xz | |
clk: at91: add generated clock driver
Add a new type of clocks that can be provided to a peripheral.
In addition to the peripheral clock, this new clock that can use several
input clocks as parents can generate divided rates.
This would allow a peripheral to have finer grained clocks for generating
a baud rate, clocking an asynchronous part or having more
options in frequency.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[sboyd@codeaurora.org: Transition to new clk_hw provider APIs]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'Documentation/devicetree/bindings/clock')
| -rw-r--r-- | Documentation/devicetree/bindings/clock/at91-clock.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/at91-clock.txt b/Documentation/devicetree/bindings/clock/at91-clock.txt index 5ba6450693b9..181bc8ac4e3a 100644 --- a/Documentation/devicetree/bindings/clock/at91-clock.txt +++ b/Documentation/devicetree/bindings/clock/at91-clock.txt @@ -77,6 +77,9 @@ Required properties: "atmel,sama5d4-clk-h32mx": at91 h32mx clock + "atmel,sama5d2-clk-generated": + at91 generated clock + Required properties for SCKC node: - reg : defines the IO memory reserved for the SCKC. - #size-cells : shall be 0 (reg is used to encode clk id). @@ -461,3 +464,35 @@ For example: compatible = "atmel,sama5d4-clk-h32mx"; clocks = <&mck>; }; + +Required properties for generated clocks: +- #size-cells : shall be 0 (reg is used to encode clk id). +- #address-cells : shall be 1 (reg is used to encode clk id). +- clocks : shall be the generated clock source phandles. + e.g. clocks = <&clk32k>, <&main>, <&plladiv>, <&utmi>, <&mck>, <&audio_pll_pmc>; +- name: device tree node describing a specific generated clock. + * #clock-cells : from common clock binding; shall be set to 0. + * reg: peripheral id. See Atmel's datasheets to get a full + list of peripheral ids. + * atmel,clk-output-range : minimum and maximum clock frequency + (two u32 fields). + +For example: + gck { + compatible = "atmel,sama5d2-clk-generated"; + #address-cells = <1>; + #size-cells = <0>; + clocks = <&clk32k>, <&main>, <&plladiv>, <&utmi>, <&mck>, <&audio_pll_pmc>; + + tcb0_gclk: tcb0_gclk { + #clock-cells = <0>; + reg = <35>; + atmel,clk-output-range = <0 83000000>; + }; + + pwm_gclk: pwm_gclk { + #clock-cells = <0>; + reg = <38>; + atmel,clk-output-range = <0 83000000>; + }; + }; |