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From: Stephen Boyd <sboyd@kernel.org>
To: devel@driverdev.osuosl.org, linux-clk@vger.kernel.org,
	linux-kernel@vger.kernel.org, shubhrajyoti.datta@gmail.com
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
	gregkh@linuxfoundation.org, mturquette@baylibre.com,
	Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>,
	robh+dt@kernel.org, soren.brinkmann@xilinx.com
Subject: Re: [PATCH v3 07/10] clk: clock-wizard: Update the fixed factor divisors
Date: Sun, 05 Jan 2020 12:00:13 -0800
Message-ID: <20200105200014.4904320678@mail.kernel.org> (raw)
In-Reply-To: <55183b0a7c466528361802fabef65a57f969d07b.1574922435.git.shubhrajyoti.datta@xilinx.com>

Quoting shubhrajyoti.datta@gmail.com (2019-11-27 22:36:14)
> From: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
> 
> Update the fixed factor clock registration to register the divisors.
> 
> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
> ---
>  drivers/clk/clk-xlnx-clock-wizard.c | 17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/clk/clk-xlnx-clock-wizard.c b/drivers/clk/clk-xlnx-clock-wizard.c
> index 4c6155b..75ea745 100644
> --- a/drivers/clk/clk-xlnx-clock-wizard.c
> +++ b/drivers/clk/clk-xlnx-clock-wizard.c
> @@ -491,9 +491,11 @@ static int clk_wzrd_probe(struct platform_device *pdev)
>         u32 reg, reg_f, mult;
>         unsigned long rate;
>         const char *clk_name;
> +       void __iomem *ctrl_reg;
>         struct clk_wzrd *clk_wzrd;
>         struct resource *mem;
>         int outputs;
> +       unsigned long flags = 0;
>         struct device_node *np = pdev->dev.of_node;
>  
>         clk_wzrd = devm_kzalloc(&pdev->dev, sizeof(*clk_wzrd), GFP_KERNEL);
> @@ -564,19 +566,22 @@ static int clk_wzrd_probe(struct platform_device *pdev)
>                 goto err_disable_clk;
>         }
>  
> -       /* register div */
> -       reg = (readl(clk_wzrd->base + WZRD_CLK_CFG_REG(0)) &
> -                       WZRD_DIVCLK_DIVIDE_MASK) >> WZRD_DIVCLK_DIVIDE_SHIFT;
> +       outputs = of_property_count_strings(np, "clock-output-names");
> +       if (outputs == 1)
> +               flags = CLK_SET_RATE_PARENT;

What does the number of clk outputs have to do with the ability to
change the rate of a parent clk? The commit text doesn't inform me of
what this is for either. Please help us understand.

>         clk_name = kasprintf(GFP_KERNEL, "%s_mul_div", dev_name(&pdev->dev));
>         if (!clk_name) {
>                 ret = -ENOMEM;
>                 goto err_rm_int_clk;
>         }
>  
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Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28  6:36 [PATCH v3 00/10] clk: clk-wizard: clock-wizard: Driver updates shubhrajyoti.datta
2019-11-28  6:36 ` [PATCH v3 01/10] dt-bindings: add documentation of xilinx clocking wizard shubhrajyoti.datta
2019-12-13 19:52   ` Rob Herring
2019-11-28  6:36 ` [PATCH v3 02/10] clk: clock-wizard: Move the clockwizard to clk shubhrajyoti.datta
2019-12-13 19:49   ` Rob Herring
2019-11-28  6:36 ` [PATCH v3 03/10] clk: clock-wizard: Fix kernel-doc warning shubhrajyoti.datta
2020-01-05 19:48   ` Stephen Boyd
2019-11-28  6:36 ` [PATCH v3 04/10] clk: clock-wizard: Add support for dynamic reconfiguration shubhrajyoti.datta
2020-01-05 19:54   ` Stephen Boyd
2019-11-28  6:36 ` [PATCH v3 05/10] clk: clock-wizard: Add support for fractional support shubhrajyoti.datta
2019-11-28  6:36 ` [PATCH v3 06/10] clk: clock-wizard: Remove the hardcoding of the clock outputs shubhrajyoti.datta
2020-01-05 19:56   ` Stephen Boyd
2019-11-28  6:36 ` [PATCH v3 07/10] clk: clock-wizard: Update the fixed factor divisors shubhrajyoti.datta
2020-01-05 20:00   ` Stephen Boyd [this message]
2020-01-06  4:17     ` Shubhrajyoti Datta
2020-01-06  6:10       ` Stephen Boyd
2019-11-28  6:36 ` [PATCH v3 08/10] clk: clock-wizard: Make the output names unique shubhrajyoti.datta
2019-11-28  7:45   ` Dan Carpenter
2019-11-29 12:07     ` Shubhrajyoti Datta
2019-11-29 19:02       ` Dan Carpenter
2019-11-28  6:36 ` [PATCH v3 09/10] staging: clocking-wizard: Delete the driver from the staging shubhrajyoti.datta
2020-01-05 19:45   ` Stephen Boyd
2019-11-28  6:36 ` [PATCH v3 10/10] clk: clock-wizard: Fix the compilation failure shubhrajyoti.datta
2020-01-05 19:46   ` Stephen Boyd

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