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Re: [PATCH 06/16] clk: at91: clk-main: factorize irq handling

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Hi Alexandre,

On Wed, 30 Sep 2015 18:10:59 +0200
Alexandre Belloni <alexandre.belloni@free-electrons.com> wrote:

> The three different irq handlers are doing the same thing, factorize their
> code in a generic irq handler.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
> ---
>  drivers/clk/at91/clk-main.c | 43 ++++++++++++++++---------------------------
>  1 file changed, 16 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
> index c1f119748bdc..79a380cd1f4e 100644
> --- a/drivers/clk/at91/clk-main.c
> +++ b/drivers/clk/at91/clk-main.c
> @@ -71,12 +71,21 @@ struct clk_sam9x5_main {
>  
>  #define to_clk_sam9x5_main(hw) container_of(hw, struct clk_sam9x5_main, hw)
>  
> -static irqreturn_t clk_main_osc_irq_handler(int irq, void *dev_id)
> +/* Generic structure */
> +struct clk_main {
> +	struct clk_hw hw;
> +	struct at91_pmc *pmc;
> +	unsigned int irq;
> +	wait_queue_head_t wait;
> +};
> +#define to_clk_main(hw) container_of(hw, struct clk_main, hw)

It wasn't clear to me at first glance that this structure was actually
a base struct for the clk_main_rc_osc and clk_sam9x5_main struct.
Maybe you should rename it into struct clk_main_base and then replace
the hw, pmc, irq and fields in the child structures by a base field.

Something like:

struct clk_sam9x5_main {
	struct clk_main_base base;
	u8 parent;
};

struct clk_main_rc_osc {
	struct clk_main_base base;
	unsigned long frequency;
	unsigned long accuracy;
};

Also, it would avoid any problem if someone decides to change the field
oder in one of those structures.

Best Regards,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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[PATCH 00/16] ARM: at91: PMC driver rework Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 06/16] clk: at91: clk-main: factorize irq handling Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
    Re: [PATCH 06/16] clk: at91: clk-main: factorize irq handling Boris Brezillon <boris.brezillon@free-electrons.com> - 2015-10-01 10:40 +0200
  [PATCH 03/16] ARM: at91/dt: use syscon for PMC Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 07/16] clk: at91: make IRQ optional and register them later Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 11/16] ARM: at91: pm: simply call at91_pm_init Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 10/16] clk: at91: pmc: move pmc structures to C file Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 14/16] ARM: at91: remove useless includes and function prototypes Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 16/16] clk: at91: pmc: drop at91_pmc_base Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 02/16] clk: at91: system: don't try to free_irq when there is no IRQ Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 12/16] ARM: at91: pm: find and remap the pmc Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 15/16] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
    Re: [PATCH 15/16] usb: gadget: atmel: access the PMC using regmap Felipe Balbi <balbi@ti.com> - 2015-09-30 18:40 +0200
      Re: [PATCH 15/16] usb: gadget: atmel: access the PMC using regmap Nicolas Ferre <nicolas.ferre@atmel.com> - 2015-09-30 18:40 +0200
        Re: [PATCH 15/16] usb: gadget: atmel: access the PMC using regmap Felipe Balbi <balbi@ti.com> - 2015-09-30 18:50 +0200
      Re: [PATCH 15/16] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 19:00 +0200
        Re: [PATCH 15/16] usb: gadget: atmel: access the PMC using regmap Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 19:10 +0200
  [PATCH 01/16] clk: at91: utmi: use pmc_read when the at91_pmc is available Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 13/16] ARM: at91: pm: move idle functions to pm.c Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
  [PATCH 08/16] clk: at91: only enable available IRQs Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:20 +0200
    Re: [PATCH 08/16] clk: at91: only enable available IRQs Ludovic Desroches <ludovic.desroches@atmel.com> - 2015-10-01 10:30 +0200
  Re: [PATCH 00/16] ARM: at91: PMC driver rework Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2015-09-30 18:30 +0200

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