linux-kernel - Re: [PATCH] clk: aspeed: Add 24MHz fixed clock

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Date:   Mon, 21 May 2018 14:03:36 +0930
From:   Joel Stanley <joel@....id.au>
To:     Lei YU <mine260309@...il.com>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Andrew Jeffery <andrew@...id.au>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, linux-clk@...r.kernel.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed@...ts.ozlabs.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>
Subject: Re: [PATCH] clk: aspeed: Add 24MHz fixed clock

On 18 May 2018 at 18:27, Lei YU <mine260309@...il.com> wrote:
> Add a 24MHz fixed clock.
> This clock will be used for certain devices, e.g. pwm.
>
> Signed-off-by: Lei YU <mine260309@...il.com>

Reviewed-by: Joel Stanley <joel@....id.au>

Cheers,

Joel

> ---
>  drivers/clk/clk-aspeed.c                 | 9 ++++++++-
>  include/dt-bindings/clock/aspeed-clock.h | 1 +
>  2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/clk-aspeed.c b/drivers/clk/clk-aspeed.c
> index 5eb50c3..4664088 100644
> --- a/drivers/clk/clk-aspeed.c
> +++ b/drivers/clk/clk-aspeed.c
> @@ -14,7 +14,7 @@
>
>  #include <dt-bindings/clock/aspeed-clock.h>
>
> -#define ASPEED_NUM_CLKS                35
> +#define ASPEED_NUM_CLKS                36
>
>  #define ASPEED_RESET_CTRL      0x04
>  #define ASPEED_CLK_SELECTION   0x08
> @@ -474,6 +474,13 @@ static int aspeed_clk_probe(struct platform_device *pdev)
>                 return PTR_ERR(hw);
>         aspeed_clk_data->hws[ASPEED_CLK_BCLK] = hw;
>
> +       /* Fixed 24MHz clock */
> +       hw = clk_hw_register_fixed_rate(NULL, "fixed-24m", "clkin",
> +                                       0, 24000000);
> +       if (IS_ERR(hw))
> +               return PTR_ERR(hw);
> +       aspeed_clk_data->hws[ASPEED_CLK_24M] = hw;
> +
>         /*
>          * TODO: There are a number of clocks that not included in this driver
>          * as more information is required:
> diff --git a/include/dt-bindings/clock/aspeed-clock.h b/include/dt-bindings/clock/aspeed-clock.h
> index d3558d8..ff29d8e 100644
> --- a/include/dt-bindings/clock/aspeed-clock.h
> +++ b/include/dt-bindings/clock/aspeed-clock.h
> @@ -38,6 +38,7 @@
>  #define ASPEED_CLK_MAC                 32
>  #define ASPEED_CLK_BCLK                        33
>  #define ASPEED_CLK_MPLL                        34
> +#define ASPEED_CLK_24M                 35
>
>  #define ASPEED_RESET_XDMA              0
>  #define ASPEED_RESET_MCTP              1
> --
> 2.7.4
>