From: Xing Zheng <zhengxing@rock-chips.com>
To: heiko@sntech.de
Cc: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com,
ijc+devicetree@hellion.org.uk, galak@codeaurora.org,
zhengxing@rock-chips.com, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 5/9] dt-bindings: add documentation of rk3036 clock controller
Date: Thu, 17 Sep 2015 18:32:49 +0800 [thread overview]
Message-ID: <1442485969-1733-1-git-send-email-zhengxing@rock-chips.com> (raw)
In-Reply-To: <1442478540-15068-1-git-send-email-zhengxing@rock-chips.com>
Add the devicetree binding for the cru on the rk3036 which quite similar
structured as previous clock controllers.
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
---
Changes in v2: None
.../bindings/clock/rockchip,rk3036-cru.txt | 60 ++++++++++++++++++++
1 file changed, 60 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3036-cru.txt
diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk3036-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk3036-cru.txt
new file mode 100644
index 0000000..ac3037a
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/rockchip,rk3036-cru.txt
@@ -0,0 +1,60 @@
+* Rockchip RK3036 Clock and Reset Unit
+
+The RK3036 clock controller generates and supplies clock to various
+controllers within the SoC and also implements a reset controller for SoC
+peripherals.
+
+Required Properties:
+
+- compatible: should be "rockchip,rk3036-cru"
+- reg: physical base address of the controller and length of memory mapped
+ region.
+- #clock-cells: should be 1.
+- #reset-cells: should be 1.
+
+Optional Properties:
+
+- rockchip,grf: phandle to the syscon managing the "general register files"
+ If missing pll rates are not changable, due to the missing pll lock status.
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume. All available clocks are defined as
+preprocessor macros in the dt-bindings/clock/rk3036-cru.h headers and can be
+used in device tree sources. Similar macros exist for the reset sources in
+these files.
+
+External clocks:
+
+There are several clocks that are generated outside the SoC. It is expected
+that they are defined using standard clock bindings with following
+clock-output-names:
+ - "xin24m" - crystal input - required,
+ - "xin32k" - rtc clock - optional,
+ - "ext_i2s" - external I2S clock - optional,
+ - "ext_hsadc" - external HSADC clock - optional,
+ - "ext_vip" - external VIP clock - optional,
+ - "ext_isp" - external ISP clock - optional,
+ - "ext_jtag" - external JTAG clock - optional
+
+Example: Clock controller node:
+
+ cru: cru@20000000 {
+ compatible = "rockchip,rk3036-cru";
+ reg = <0x20000000 0x1000>;
+ rockchip,grf = <&grf>;
+
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+ };
+
+Example: UART controller node that consumes the clock generated by the clock
+ controller:
+
+ uart0: serial@20060000 {
+ compatible = "snps,dw-apb-uart";
+ reg = <0x20060000 0x100>;
+ interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
+ reg-shift = <2>;
+ reg-io-width = <4>;
+ clocks = <&cru SCLK_UART0>;
+ };
--
1.7.9.5
next prev parent reply other threads:[~2015-09-17 10:33 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-17 8:28 [PATCH v2 0/9] Build and support rk3036 SoC platform Xing Zheng
2015-09-17 8:28 ` [PATCH v2 1/9] ARM: dts: rockchip: add core rk3036 dts Xing Zheng
2015-09-17 9:18 ` Heiko Stübner
2015-09-24 2:18 ` Xing Zheng
2015-09-17 8:28 ` [PATCH v2 2/9] clk: rockchip: add dt-binding header for rk3036 Xing Zheng
2015-09-17 9:25 ` Heiko Stübner
2015-09-24 2:17 ` Xing Zheng
2015-09-17 8:28 ` [PATCH v2 3/9] clk: rockchip: add clock controller " Xing Zheng
2015-09-17 9:47 ` Heiko Stübner
2015-09-24 3:04 ` Xing Zheng
2015-09-24 3:31 ` Xing Zheng
2015-10-07 10:24 ` Heiko Stuebner
2015-09-17 8:28 ` [PATCH v2 4/9] clk: rockchip: add new clock type and " Xing Zheng
2015-09-17 9:54 ` Heiko Stübner
2015-09-22 22:41 ` Stephen Boyd
2015-09-22 22:58 ` Heiko Stübner
2015-09-22 23:19 ` Stephen Boyd
2015-09-30 23:32 ` Heiko Stübner
2015-10-01 0:51 ` Stephen Boyd
2015-09-17 9:59 ` [PATCH v2 0/9] Build and support rk3036 SoC platform Heiko Stübner
2015-09-17 10:32 ` Xing Zheng [this message]
2015-09-17 15:09 ` [PATCH v2 5/9] dt-bindings: add documentation of rk3036 clock controller Heiko Stübner
2015-09-24 3:42 ` Xing Zheng
2015-09-17 10:34 ` [PATCH v2 6/9] pinctrl: rockchip: add support for the rk3036 Xing Zheng
2015-09-17 12:47 ` Heiko Stübner
2015-09-17 10:37 ` [PATCH v2 7/9] rockchip: make sure timer5 is enabled on rk3036 platforms Xing Zheng
2015-09-17 15:05 ` Heiko Stübner
2015-09-28 12:25 ` Xing Zheng
2015-09-28 12:44 ` Heiko Stübner
2015-09-28 12:53 ` Xing Zheng
2015-09-17 10:38 ` [PATCH v2 8/9] ARM: rockchip: add support smp for rk3036 Xing Zheng
2015-09-17 20:15 ` Heiko Stübner
2015-09-28 11:50 ` Xing Zheng
2015-09-17 10:39 ` [PATCH v2 9/9] rtc: hym8563: make sure hym8563 can be normal work Xing Zheng
2015-09-17 12:07 ` Heiko Stübner
2015-09-17 12:31 ` Alexandre Belloni
2015-09-17 12:44 ` Xing Zheng
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