linux-kernel - Re: [PATCH 05/35] ARM: davinci: drop irq defines from default

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Date:   Mon, 4 Feb 2019 18:20:18 -0600
From:   David Lechner <david@...hnology.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>, Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 05/35] ARM: davinci: drop irq defines from
 default_priorites

On 1/31/19 7:38 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> In order to select SPARSE_IRQ we need to make the interrupt numbers
> dynamic (at least at build-time for the top-level controller). The
> interrupt numbers are used as array indexes for irq priorities.
> 
> Drop the defines and just initialize the arrays in a linear manner.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>   arch/arm/mach-davinci/da830.c  | 107 ++++--------------------------
>   arch/arm/mach-davinci/da850.c  | 118 +++++----------------------------
>   arch/arm/mach-davinci/dm355.c  |  74 +++------------------
>   arch/arm/mach-davinci/dm365.c  |  76 +++------------------
>   arch/arm/mach-davinci/dm644x.c |  76 +++------------------
>   arch/arm/mach-davinci/dm646x.c |  76 +++------------------
>   6 files changed, 69 insertions(+), 458 deletions(-)
> 
> diff --git a/arch/arm/mach-davinci/da830.c b/arch/arm/mach-davinci/da830.c
> index 9e18b245266b..f1e7b6c644e5 100644
> --- a/arch/arm/mach-davinci/da830.c
> +++ b/arch/arm/mach-davinci/da830.c
> @@ -624,98 +624,19 @@ const short da830_eqep1_pins[] __initconst = {
>   };
>   
>   /* FIQ are pri 0-1; otherwise 2-7, with 7 lowest priority */
> -static u8 da830_default_priorities[DA830_N_CP_INTC_IRQ] = {
> -	[IRQ_DA8XX_COMMTX]		= 7,
> -	[IRQ_DA8XX_COMMRX]		= 7,
> -	[IRQ_DA8XX_NINT]		= 7,
> -	[IRQ_DA8XX_EVTOUT0]		= 7,
> -	[IRQ_DA8XX_EVTOUT1]		= 7,
> -	[IRQ_DA8XX_EVTOUT2]		= 7,
> -	[IRQ_DA8XX_EVTOUT3]		= 7,
> -	[IRQ_DA8XX_EVTOUT4]		= 7,
> -	[IRQ_DA8XX_EVTOUT5]		= 7,
> -	[IRQ_DA8XX_EVTOUT6]		= 7,
> -	[IRQ_DA8XX_EVTOUT7]		= 7,
> -	[IRQ_DA8XX_CCINT0]		= 7,
> -	[IRQ_DA8XX_CCERRINT]		= 7,
> -	[IRQ_DA8XX_TCERRINT0]		= 7,
> -	[IRQ_DA8XX_AEMIFINT]		= 7,
> -	[IRQ_DA8XX_I2CINT0]		= 7,
> -	[IRQ_DA8XX_MMCSDINT0]		= 7,
> -	[IRQ_DA8XX_MMCSDINT1]		= 7,
> -	[IRQ_DA8XX_ALLINT0]		= 7,
> -	[IRQ_DA8XX_RTC]			= 7,
> -	[IRQ_DA8XX_SPINT0]		= 7,
> -	[IRQ_DA8XX_TINT12_0]		= 7,
> -	[IRQ_DA8XX_TINT34_0]		= 7,
> -	[IRQ_DA8XX_TINT12_1]		= 7,
> -	[IRQ_DA8XX_TINT34_1]		= 7,
> -	[IRQ_DA8XX_UARTINT0]		= 7,
> -	[IRQ_DA8XX_KEYMGRINT]		= 7,
> -	[IRQ_DA830_MPUERR]		= 7,
> -	[IRQ_DA8XX_CHIPINT0]		= 7,
> -	[IRQ_DA8XX_CHIPINT1]		= 7,
> -	[IRQ_DA8XX_CHIPINT2]		= 7,
> -	[IRQ_DA8XX_CHIPINT3]		= 7,
> -	[IRQ_DA8XX_TCERRINT1]		= 7,
> -	[IRQ_DA8XX_C0_RX_THRESH_PULSE]	= 7,
> -	[IRQ_DA8XX_C0_RX_PULSE]		= 7,
> -	[IRQ_DA8XX_C0_TX_PULSE]		= 7,
> -	[IRQ_DA8XX_C0_MISC_PULSE]	= 7,
> -	[IRQ_DA8XX_C1_RX_THRESH_PULSE]	= 7,
> -	[IRQ_DA8XX_C1_RX_PULSE]		= 7,
> -	[IRQ_DA8XX_C1_TX_PULSE]		= 7,
> -	[IRQ_DA8XX_C1_MISC_PULSE]	= 7,
> -	[IRQ_DA8XX_MEMERR]		= 7,
> -	[IRQ_DA8XX_GPIO0]		= 7,
> -	[IRQ_DA8XX_GPIO1]		= 7,
> -	[IRQ_DA8XX_GPIO2]		= 7,
> -	[IRQ_DA8XX_GPIO3]		= 7,
> -	[IRQ_DA8XX_GPIO4]		= 7,
> -	[IRQ_DA8XX_GPIO5]		= 7,
> -	[IRQ_DA8XX_GPIO6]		= 7,
> -	[IRQ_DA8XX_GPIO7]		= 7,
> -	[IRQ_DA8XX_GPIO8]		= 7,
> -	[IRQ_DA8XX_I2CINT1]		= 7,
> -	[IRQ_DA8XX_LCDINT]		= 7,
> -	[IRQ_DA8XX_UARTINT1]		= 7,
> -	[IRQ_DA8XX_MCASPINT]		= 7,
> -	[IRQ_DA8XX_ALLINT1]		= 7,
> -	[IRQ_DA8XX_SPINT1]		= 7,
> -	[IRQ_DA8XX_UHPI_INT1]		= 7,
> -	[IRQ_DA8XX_USB_INT]		= 7,
> -	[IRQ_DA8XX_IRQN]		= 7,
> -	[IRQ_DA8XX_RWAKEUP]		= 7,
> -	[IRQ_DA8XX_UARTINT2]		= 7,
> -	[IRQ_DA8XX_DFTSSINT]		= 7,
> -	[IRQ_DA8XX_EHRPWM0]		= 7,
> -	[IRQ_DA8XX_EHRPWM0TZ]		= 7,
> -	[IRQ_DA8XX_EHRPWM1]		= 7,
> -	[IRQ_DA8XX_EHRPWM1TZ]		= 7,
> -	[IRQ_DA830_EHRPWM2]		= 7,
> -	[IRQ_DA830_EHRPWM2TZ]		= 7,
> -	[IRQ_DA8XX_ECAP0]		= 7,
> -	[IRQ_DA8XX_ECAP1]		= 7,
> -	[IRQ_DA8XX_ECAP2]		= 7,
> -	[IRQ_DA830_EQEP0]		= 7,
> -	[IRQ_DA830_EQEP1]		= 7,
> -	[IRQ_DA830_T12CMPINT0_0]	= 7,
> -	[IRQ_DA830_T12CMPINT1_0]	= 7,
> -	[IRQ_DA830_T12CMPINT2_0]	= 7,
> -	[IRQ_DA830_T12CMPINT3_0]	= 7,
> -	[IRQ_DA830_T12CMPINT4_0]	= 7,
> -	[IRQ_DA830_T12CMPINT5_0]	= 7,
> -	[IRQ_DA830_T12CMPINT6_0]	= 7,
> -	[IRQ_DA830_T12CMPINT7_0]	= 7,
> -	[IRQ_DA830_T12CMPINT0_1]	= 7,
> -	[IRQ_DA830_T12CMPINT1_1]	= 7,
> -	[IRQ_DA830_T12CMPINT2_1]	= 7,
> -	[IRQ_DA830_T12CMPINT3_1]	= 7,
> -	[IRQ_DA830_T12CMPINT4_1]	= 7,
> -	[IRQ_DA830_T12CMPINT5_1]	= 7,
> -	[IRQ_DA830_T12CMPINT6_1]	= 7,
> -	[IRQ_DA830_T12CMPINT7_1]	= 7,
> -	[IRQ_DA8XX_ARMCLKSTOPREQ]	= 7,
> +static u8 da830_cp_intc_prios[] = {
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
> +	7, 7, 7, 7, 7, 7, 7, 7,
>   };
>  

Technically, any holes in the array that are being deleted
here have a default priority of 15 assigned in the cp_intc
driver instead of 7. I don't think this is a problem, but it
might be worth mentioning in the commit message. Same goes
for DA850.