From 2c74b5399de730e3155dc3d5a8ad041fba5e93f4 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 28 Sep 2015 14:22:03 -0700 Subject: [PATCH] clk: bcm2835: Add binding docs for the new platform clock driver. Previously we've only supported a few fixed clocks based on assumptions about how the firmware sets up the clocks, but this binding will let us control the actual (audio power domain) clock manager. Signed-off-by: Eric Anholt Acked-by: Stephen Warren Acked-by: Lee Jones Signed-off-by: Stephen Boyd --- .../bindings/clock/brcm,bcm2835-cprman.txt | 45 ++++++++++++++++++ include/dt-bindings/clock/bcm2835.h | 47 +++++++++++++++++++ 2 files changed, 92 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt create mode 100644 include/dt-bindings/clock/bcm2835.h diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt new file mode 100644 index 000000000000..e56a1df3a9d3 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt @@ -0,0 +1,45 @@ +Broadcom BCM2835 CPRMAN clocks + +This binding uses the common clock binding: + Documentation/devicetree/bindings/clock/clock-bindings.txt + +The CPRMAN clock controller generates clocks in the audio power domain +of the BCM2835. There is a level of PLLs deriving from an external +oscillator, a level of PLL dividers that produce channels off of the +few PLLs, and a level of mostly-generic clock generators sourcing from +the PLL channels. Most other hardware components source from the +clock generators, but a few (like the ARM or HDMI) will source from +the PLL dividers directly. + +Required properties: +- compatible: Should be "brcm,bcm2835-cprman" +- #clock-cells: Should be <1>. The permitted clock-specifier values can be + found in include/dt-bindings/clock/bcm2835.h +- reg: Specifies base physical address and size of the registers +- clocks: The external oscillator clock phandle + +Example: + + clk_osc: clock@3 { + compatible = "fixed-clock"; + reg = <3>; + #clock-cells = <0>; + clock-output-names = "osc"; + clock-frequency = <19200000>; + }; + + clocks: cprman@7e101000 { + compatible = "brcm,bcm2835-cprman"; + #clock-cells = <1>; + reg = <0x7e101000 0x2000>; + clocks = <&clk_osc>; + }; + + i2c0: i2c@7e205000 { + compatible = "brcm,bcm2835-i2c"; + reg = <0x7e205000 0x1000>; + interrupts = <2 21>; + clocks = <&clocks BCM2835_CLOCK_VPU>; + #address-cells = <1>; + #size-cells = <0>; + }; diff --git a/include/dt-bindings/clock/bcm2835.h b/include/dt-bindings/clock/bcm2835.h new file mode 100644 index 000000000000..d323efac7edf --- /dev/null +++ b/include/dt-bindings/clock/bcm2835.h @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2015 Broadcom Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define BCM2835_PLLA 0 +#define BCM2835_PLLB 1 +#define BCM2835_PLLC 2 +#define BCM2835_PLLD 3 +#define BCM2835_PLLH 4 + +#define BCM2835_PLLA_CORE 5 +#define BCM2835_PLLA_PER 6 +#define BCM2835_PLLB_ARM 7 +#define BCM2835_PLLC_CORE0 8 +#define BCM2835_PLLC_CORE1 9 +#define BCM2835_PLLC_CORE2 10 +#define BCM2835_PLLC_PER 11 +#define BCM2835_PLLD_CORE 12 +#define BCM2835_PLLD_PER 13 +#define BCM2835_PLLH_RCAL 14 +#define BCM2835_PLLH_AUX 15 +#define BCM2835_PLLH_PIX 16 + +#define BCM2835_CLOCK_TIMER 17 +#define BCM2835_CLOCK_OTP 18 +#define BCM2835_CLOCK_UART 19 +#define BCM2835_CLOCK_VPU 20 +#define BCM2835_CLOCK_V3D 21 +#define BCM2835_CLOCK_ISP 22 +#define BCM2835_CLOCK_H264 23 +#define BCM2835_CLOCK_VEC 24 +#define BCM2835_CLOCK_HSM 25 +#define BCM2835_CLOCK_SDRAM 26 +#define BCM2835_CLOCK_TSENS 27 +#define BCM2835_CLOCK_EMMC 28 +#define BCM2835_CLOCK_PERI_IMAGE 29 + +#define BCM2835_CLOCK_COUNT 30 -- 2.39.5