linux-kernel - [PATCH v2 02/10] dt-bindings: add documentation for rk1108 cru

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1479124981-24181-1-git-send-email-andy.yan@rock-chips.com>
Date:   Mon, 14 Nov 2016 20:03:01 +0800
From:   Andy Yan <andy.yan@...k-chips.com>
To:     heiko@...ech.de
Cc:     shawn.lin@...k-chips.com, robh+dt@...nel.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, mark.rutland@....com,
        mturquette@...libre.com, sboyd@...eaurora.org,
        Andy Yan <andy.yan@...k-chips.com>
Subject: [PATCH v2 02/10] dt-bindings: add documentation for rk1108 cru

From: Shawn Lin <shawn.lin@...k-chips.com>

This adds the dt-binding documentation for the clock and reset unit
found on Rockchip rk1108 SoCs.

Signed-off-by: Shawn Lin <shawn.lin@...k-chips.com>
Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
---

Changes in v2: None

 .../bindings/clock/rockchip,rk1108-cru.txt         | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk1108-cru.txt

diff --git a/Documentation/devicetree/bindings/clock/rockchip,rk1108-cru.txt b/Documentation/devicetree/bindings/clock/rockchip,rk1108-cru.txt
new file mode 100644
index 0000000..4d2356b
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/rockchip,rk1108-cru.txt
@@ -0,0 +1,60 @@
+* Rockchip RK1108 Clock and Reset Unit
+
+The RK1108 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,rk1108-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 changeable, 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/rk1108-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,
+ - "cif_clkout" - output clock for the cif - optional
+ - "mipi_csi_clkout" - output clock for the mipi csi - optional
+ - "pclkin_vip" - external VIP clock - optional
+ - "ext_i2s" - external I2S clock - optional
+ - "ext_gmac" - external GMAC clock - optional
+ - "mac_ref_clkout" - output clock of the pll in the mac phy
+
+Example: Clock controller node:
+
+	cru: cru@...00000 {
+		compatible = "rockchip,rk1108-cru";
+		reg = <0x20200000 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@...30000 {
+		compatible = "rockchip,rk1108-uart", "snps,dw-apb-uart";
+		reg = <0x10230000 0x100>;
+		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
+		reg-shift = <2>;
+		reg-io-width = <4>;
+		clocks = <&cru SCLK_UART0>;
+	};
-- 
2.7.4