linux-kernel - Re: [PATCH v2 25/91] clk: bcm: Add BCM2711 DVP driver

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Date:   Wed, 27 May 2020 00:06:12 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Eric Anholt <eric@...olt.net>, Maxime Ripard <maxime@...no.tech>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     dri-devel@...ts.freedesktop.org,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Maxime Ripard <maxime@...no.tech>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 25/91] clk: bcm: Add BCM2711 DVP driver

Quoting Maxime Ripard (2020-04-24 08:34:06)
> The HDMI block has a block that controls clocks and reset signals to the
> HDMI0 and HDMI1 controllers.
> 
> Let's expose that through a clock driver implementing a clock and reset
> provider.
> 
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: Stephen Boyd <sboyd@...nel.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: linux-clk@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---

Reviewed-by: Stephen Boyd <sboyd@...nel.org>

> diff --git a/drivers/clk/bcm/clk-bcm2711-dvp.c b/drivers/clk/bcm/clk-bcm2711-dvp.c
> new file mode 100644
> index 000000000000..c1c4b5857d32
> --- /dev/null
> +++ b/drivers/clk/bcm/clk-bcm2711-dvp.c
> @@ -0,0 +1,127 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +// Copyright 2020 Cerno
> +
> +#include <linux/clk-provider.h>
> +#include <linux/module.h>
[...]
> +
> +static int clk_dvp_probe(struct platform_device *pdev)
> +{
> +       struct clk_hw_onecell_data *data;
> +       struct resource *res;
> +       struct clk_dvp *dvp;
> +       void __iomem *base;
> +       int ret;
> +
> +       dvp = devm_kzalloc(&pdev->dev, sizeof(*dvp), GFP_KERNEL);
> +       if (!dvp)
> +               return -ENOMEM;
> +       platform_set_drvdata(pdev, dvp);
> +
> +       dvp->data = devm_kzalloc(&pdev->dev,
> +                                struct_size(dvp->data, hws, NR_CLOCKS),
> +                                GFP_KERNEL);
> +       if (!dvp->data)
> +               return -ENOMEM;
> +       data = dvp->data;
> +
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       base = devm_ioremap_resource(&pdev->dev, res);

devm_platform_ioremap_resource()?

> +       if (IS_ERR(base))
> +               return PTR_ERR(base);
> +