linux-kernel - Re: [PATCH v3 004/105] clk: bcm: Add BCM2711 DVP driver

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Message-ID: <CADaigPUOJMwR0y6CjVpu5+nPAvejbCvEQNLEC+EKq9haBaQynw@mail.gmail.com>
Date:   Fri, 5 Jun 2020 10:56:58 -0700
From:   Eric Anholt <eric@...olt.net>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        linux-rpi-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 004/105] clk: bcm: Add BCM2711 DVP driver

On Wed, May 27, 2020 at 8:49 AM Maxime Ripard <maxime@...no.tech> wrote:
>
> 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
> Reviewed-by: Stephen Boyd <sboyd@...nel.org>
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---
>  drivers/clk/bcm/Kconfig           |  11 +++-
>  drivers/clk/bcm/Makefile          |   1 +-
>  drivers/clk/bcm/clk-bcm2711-dvp.c | 127 +++++++++++++++++++++++++++++++-
>  3 files changed, 139 insertions(+)
>  create mode 100644 drivers/clk/bcm/clk-bcm2711-dvp.c
>
> diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
> index 8c83977a7dc4..784f12c72365 100644
> --- a/drivers/clk/bcm/Kconfig
> +++ b/drivers/clk/bcm/Kconfig
> @@ -1,4 +1,15 @@
>  # SPDX-License-Identifier: GPL-2.0-only
> +
> +config CLK_BCM2711_DVP
> +       tristate "Broadcom BCM2711 DVP support"
> +       depends on ARCH_BCM2835 ||COMPILE_TEST
> +       depends on COMMON_CLK
> +       default ARCH_BCM2835
> +       select RESET_SIMPLE
> +       help
> +         Enable common clock framework support for the Broadcom BCM2711
> +         DVP Controller.
> +
>  config CLK_BCM2835
>         bool "Broadcom BCM2835 clock support"
>         depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
> diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile
> index 0070ddf6cdd2..2c1349062147 100644
> --- a/drivers/clk/bcm/Makefile
> +++ b/drivers/clk/bcm/Makefile
> @@ -6,6 +6,7 @@ obj-$(CONFIG_CLK_BCM_KONA)      += clk-kona-setup.o
>  obj-$(CONFIG_CLK_BCM_KONA)     += clk-bcm281xx.o
>  obj-$(CONFIG_CLK_BCM_KONA)     += clk-bcm21664.o
>  obj-$(CONFIG_COMMON_CLK_IPROC) += clk-iproc-armpll.o clk-iproc-pll.o clk-iproc-asiu.o
> +obj-$(CONFIG_CLK_BCM2835)      += clk-bcm2711-dvp.o
>  obj-$(CONFIG_CLK_BCM2835)      += clk-bcm2835.o
>  obj-$(CONFIG_CLK_BCM2835)      += clk-bcm2835-aux.o
>  obj-$(CONFIG_CLK_RASPBERRYPI)  += clk-raspberrypi.o

I do think that single driver is the right model here, but I noticed
that you're not using your new CONFIG_ symbol.  With that fixed, r-b
from me.

(though I'd also recommend devm_platform_get_and_ioremap_resource and
devm_reset_controller_register())