linux-kernel - Re: [PATCH 40/41] [TO BE REBASED] ARM: OMAP1: clock: Convert to CCF

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Date:   Thu, 21 Apr 2022 09:24:39 +0300
From:   Tony Lindgren <tony@...mide.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-omap@...r.kernel.org, aaro.koskinen@....fi,
        jmkrzyszt@...il.com, Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Paul Walmsley <paul@...an.com>,
        Kevin Hilman <khilman@...nel.org>,
        Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Vinod Koul <vkoul@...nel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Mark Brown <broonie@...nel.org>,
        Felipe Balbi <balbi@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Helge Deller <deller@....de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, dmaengine@...r.kernel.org,
        linux-input@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-serial@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH 40/41] [TO BE REBASED] ARM: OMAP1: clock: Convert to CCF

* Arnd Bergmann <arnd@...nel.org> [220419 13:39]:
> From: Janusz Krzysztofik <jmkrzyszt@...il.com>
> +	/* protect clk->enable_reg from concurrent access via clk_set_rate() */
> +	if (clk->enable_reg == OMAP1_IO_ADDRESS(ARM_CKCTL))
> +		spin_lock_irqsave(&arm_ckctl_lock, flags);
> +	else if (clk->enable_reg == OMAP1_IO_ADDRESS(ARM_IDLECT2))
> +		spin_lock_irqsave(&arm_idlect2_lock, flags);
> +	else if (clk->enable_reg == OMAP1_IO_ADDRESS(MOD_CONF_CTRL_0))
> +		spin_lock_irqsave(&mod_conf_ctrl_0_lock, flags);
> +	else if (clk->enable_reg == OMAP1_IO_ADDRESS(MOD_CONF_CTRL_1))
> +		spin_lock_irqsave(&mod_conf_ctrl_1_lock, flags);
> +	else if (clk->enable_reg == OMAP1_IO_ADDRESS(SWD_CLK_DIV_CTRL_SEL))
> +		spin_lock_irqsave(&swd_clk_div_ctrl_sel_lock, flags);
> +

Eventually there should be just separate clock controller instances for
the clock registers banks, and then this should all disappear as the
lock is instance specific. Anyways, that's probably best done as a separate
changes later on.

Regards,

Tony