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Date: Thu, 1 Oct 2015 13:27:06 +0100
From: Lee Jones <lee@...nel.org>
To: Eric Anholt <eric@...olt.net>
Cc: linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-rpi-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Stephen Warren <swarren@...dotorg.org>,
Stephen Boyd <sboyd@...eaurora.org>,
Mike Turquette <mturquette@...libre.com>,
devicetree@...r.kernel.org
Subject: Re: [PATCH v3 2/4] clk: bcm2835: Add binding docs for the new
platform clock driver.
On Mon, 28 Sep 2015, Eric Anholt wrote:
> 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 <eric@...olt.net>
> Acked-by: Stephen Warren <swarren@...dotorg.org>
> ---
> .../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
Acked-by: Lee Jones <lee@...nel.org>
> 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 0000000..e56a1df
> --- /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@...01000 {
> + compatible = "brcm,bcm2835-cprman";
> + #clock-cells = <1>;
> + reg = <0x7e101000 0x2000>;
> + clocks = <&clk_osc>;
> + };
> +
> + i2c0: i2c@...05000 {
> + 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 0000000..d323efa
> --- /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
--
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