linux-kernel - Re: [PATCH V4 05/12] boot_constraint: Add support for clk constraints

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Date:   Wed, 13 Dec 2017 10:48:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        robdclark@...il.com, s.hauer@...gutronix.de,
        l.stach@...gutronix.de, shawnguo@...nel.org, fabio.estevam@....com,
        nm@...com, xuwei5@...ilicon.com, robh+dt@...nel.org
Subject: Re: [PATCH V4 05/12] boot_constraint: Add support for clk constraints

On Sun, Oct 29, 2017 at 07:18:53PM +0530, Viresh Kumar wrote:
> This patch adds the clk constraint type.
> 
> The constraint is set by enabling the clk for the device. Once the
> device is probed, the clk is disabled and the constraint is removed.
> 
> We may want to do clk_set_rate() from here, but lets wait for some real
> users that really want it.
> 
> Tested-by: Rajendra Nayak <rnayak@...eaurora.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  drivers/boot_constraints/Makefile |  2 +-
>  drivers/boot_constraints/clk.c    | 70 +++++++++++++++++++++++++++++++++++++++
>  drivers/boot_constraints/core.c   |  4 +++
>  drivers/boot_constraints/core.h   |  3 ++
>  include/linux/boot_constraint.h   |  5 +++
>  5 files changed, 83 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/boot_constraints/clk.c
> 
> diff --git a/drivers/boot_constraints/Makefile b/drivers/boot_constraints/Makefile
> index a45616f0c3b0..3424379fd1e4 100644
> --- a/drivers/boot_constraints/Makefile
> +++ b/drivers/boot_constraints/Makefile
> @@ -1,3 +1,3 @@
>  # Makefile for device boot constraints
>  
> -obj-y := core.o supply.o
> +obj-y := clk.o core.o supply.o
> diff --git a/drivers/boot_constraints/clk.c b/drivers/boot_constraints/clk.c
> new file mode 100644
> index 000000000000..b5b1d63c3e76
> --- /dev/null
> +++ b/drivers/boot_constraints/clk.c
> @@ -0,0 +1,70 @@
> +/*
> + * Copyright (C) 2017 Linaro.
> + * Viresh Kumar <viresh.kumar@...aro.org>
> + *
> + * This file is released under the GPLv2.
> + */
> +
> +#define pr_fmt(fmt) "Clock Boot Constraints: " fmt

You don't use this :(