linux-kernel - Re: [PATCH v2 2/3] clk: zynqmp: Use firmware specific divider clock flags

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Message-ID: <20200722132708.GD21264@pengutronix.de>
Date:   Wed, 22 Jul 2020 15:27:08 +0200
From:   Michael Tretter <m.tretter@...gutronix.de>
To:     Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
Cc:     mturquette@...libre.com, sboyd@...eaurora.org, sboyd@...nel.org,
        michal.simek@...inx.com, mark.rutland@....com,
        linux-clk@...r.kernel.org, rajanv@...inx.com, jollys@...inx.com,
        tejasp@...inx.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Rajan Vaja <rajan.vaja@...inx.com>,
        Tejas Patel <tejas.patel@...inx.com>
Subject: Re: [PATCH v2 2/3] clk: zynqmp: Use firmware specific divider clock
 flags

On Tue, 21 Jul 2020 23:55:31 -0700, Amit Sunil Dhamne wrote:
> From: Rajan Vaja <rajan.vaja@...inx.com>
> 
> Use ZynqMP specific divider clock flags instead of using CCF flags.
> 
> Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
> Signed-off-by: Tejas Patel <tejas.patel@...inx.com>
> Signed-off-by: Amit Sunil Dhamne <amit.sunil.dhamne@...inx.com>
> ---
>  drivers/clk/zynqmp/clk-zynqmp.h |  9 +++++++++
>  drivers/clk/zynqmp/divider.c    | 16 +++++++++++++++-
>  2 files changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/zynqmp/clk-zynqmp.h b/drivers/clk/zynqmp/clk-zynqmp.h
> index 3cb6149..ec33525 100644
> --- a/drivers/clk/zynqmp/clk-zynqmp.h
> +++ b/drivers/clk/zynqmp/clk-zynqmp.h
> @@ -32,6 +32,15 @@
>  /* do not gate, ever */
>  #define ZYNQMP_CLK_IS_CRITICAL         BIT(11)
> 
> +/* Type Flags for divider clock */
> +#define ZYNQMP_CLK_DIVIDER_ONE_BASED           BIT(0)
> +#define ZYNQMP_CLK_DIVIDER_POWER_OF_TWO                BIT(1)
> +#define ZYNQMP_CLK_DIVIDER_ALLOW_ZERO          BIT(2)
> +#define ZYNQMP_CLK_DIVIDER_HIWORD_MASK         BIT(3)
> +#define ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST       BIT(4)
> +#define ZYNQMP_CLK_DIVIDER_READ_ONLY           BIT(5)
> +#define ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO         BIT(6)
> +
>  enum topology_type {
>         TYPE_INVALID,
>         TYPE_MUX,
> diff --git a/drivers/clk/zynqmp/divider.c b/drivers/clk/zynqmp/divider.c
> index 3ab57d9..86cb785 100644
> --- a/drivers/clk/zynqmp/divider.c
> +++ b/drivers/clk/zynqmp/divider.c
> @@ -320,7 +320,21 @@ struct clk_hw *zynqmp_clk_register_divider(const char *name,
>         /* struct clk_divider assignments */
>         div->is_frac = !!((nodes->flag & CLK_FRAC) |
>                           (nodes->custom_type_flag & CUSTOM_FLAG_CLK_FRAC));
> -       div->flags = nodes->type_flag;
> +       div->flags = 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_ONE_BASED) ?
> +                     CLK_DIVIDER_ONE_BASED : 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO) ?
> +                     CLK_DIVIDER_POWER_OF_TWO : 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_ALLOW_ZERO) ?
> +                     CLK_DIVIDER_ALLOW_ZERO : 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_POWER_OF_TWO) ?
> +                     CLK_DIVIDER_HIWORD_MASK : 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_ROUND_CLOSEST) ?
> +                     CLK_DIVIDER_ROUND_CLOSEST : 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_READ_ONLY) ?
> +                     CLK_DIVIDER_READ_ONLY : 0;
> +       div->flags |= (nodes->type_flag & ZYNQMP_CLK_DIVIDER_MAX_AT_ZERO) ?
> +                     CLK_DIVIDER_MAX_AT_ZERO : 0;

Add a helper function for converting the flags.

Michael

>         div->hw.init = &init;
>         div->clk_id = clk_id;
>         div->div_type = nodes->type;
> --
> 2.7.4
> 
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