linux-kernel - Re: [PATCH 0/4] ARM: shmobile: r8a7740: Handle implicitly enabled clocks

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Message-ID: <20140914065446.GO21986@titan.lakedaemon.net>
Date:	Sun, 14 Sep 2014 02:54:46 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Geert Uytterhoeven <geert+renesas@...der.be>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: Re: [PATCH 0/4] ARM: shmobile: r8a7740: Handle implicitly enabled
 clocks

On Fri, Sep 12, 2014 at 03:15:16PM +0200, Geert Uytterhoeven wrote:
> 	Hi all,
> 
> This patch series fixes an issue with the INTCA module clock, which we
> currently assume enabled by the bootloader or reset state.
> If this clock was not enabled before booting Linux, the intc-irqpin driver
> and all devices connected to it (buttons, RTC on i2c-gpio) don't work.
> 
> To fix this, the clock is added to the system, and is managed in the driver
> through runtime PM, taking into account wake-up sources (gpio-keys, RTC alarm).
> 
> There's one remaining issue for armadillo-legacy, which has support for the LCD
> controller. Although the shmobile_lcd_fb driver doesn't use MERAM on r8a7740
> (unlike on sh7372), the MERAM (Media RAM) and ICB (MERAM Interconnect Buffer)
> clocks must be enabled to show a picture on the display. However, the MERAM
> doesn't have any device associated with it, so it's non-trivial to hook it up.
> 
> This patch series is based on renesas-devel-20140911-v3.17-rc4 and
> irqchip/for-next.
> 
> Geert Uytterhoeven (4):
>   irqchip: renesas-intc-irqpin: Add helper variable dev = &pdev->dev
>   irqchip: renesas-intc-irqpin: Add minimal runtime PM support
>   ARM: shmobile: r8a7740 legacy: Add missing INTCA clock for irqpin
>     module
>   ARM: shmobile: r8a7740 dtsi: Add missing INTCA clock for irqpin module
> 
>  arch/arm/boot/dts/r8a7740.dtsi            | 14 ++++--
>  arch/arm/mach-shmobile/clock-r8a7740.c    |  7 ++-
>  drivers/irqchip/irq-renesas-intc-irqpin.c | 83 +++++++++++++++++++++----------
>  include/dt-bindings/clock/r8a7740-clock.h |  1 +
>  4 files changed, 73 insertions(+), 32 deletions(-)

Patches 1 and 2 applied to irqchip/core

thx,

Jason.
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