linux-kernel - Re: [PATCH 4/8] irqchip/qeic: move qeic driver from drivers/soc/fsl/qe

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Date:   Fri, 3 Nov 2017 11:02:43 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Zhao Qiang <qiang.zhao@....com>, tglx@...utronix.de,
        jason@...edaemon.net
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/8] irqchip/qeic: move qeic driver from
 drivers/soc/fsl/qe

On 01/11/17 01:34, Zhao Qiang wrote:
> move the driver from drivers/soc/fsl/qe to drivers/irqchip,
> merge qe_ic.h and qe_ic.c into irq-qeic.c.
> 
> Signed-off-by: Zhao Qiang <qiang.zhao@....com>
> ---
>  drivers/irqchip/Makefile    |   1 +
>  drivers/irqchip/irq-qeic.c  | 601 ++++++++++++++++++++++++++++++++++++++++++++
>  drivers/soc/fsl/qe/Makefile |   2 +-
>  drivers/soc/fsl/qe/qe_ic.c  | 512 -------------------------------------
>  drivers/soc/fsl/qe/qe_ic.h  | 103 --------
>  5 files changed, 603 insertions(+), 616 deletions(-)
>  create mode 100644 drivers/irqchip/irq-qeic.c
>  delete mode 100644 drivers/soc/fsl/qe/qe_ic.c
>  delete mode 100644 drivers/soc/fsl/qe/qe_ic.h

So that's where this is hiding. Next time, please send one consistent
series, not something that is spanned across two series with no
indication of the dependency.

> 
> diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
> index 0e55d94..627c5d6 100644
> --- a/drivers/irqchip/Makefile
> +++ b/drivers/irqchip/Makefile
> @@ -75,3 +75,4 @@ obj-$(CONFIG_LS_SCFG_MSI)		+= irq-ls-scfg-msi.o
>  obj-$(CONFIG_EZNPS_GIC)			+= irq-eznps.o
>  obj-$(CONFIG_ARCH_ASPEED)		+= irq-aspeed-vic.o
>  obj-$(CONFIG_STM32_EXTI) 		+= irq-stm32-exti.o
> +obj-$(CONFIG_QUICC_ENGINE)		+= irq-qeic.o
> diff --git a/drivers/irqchip/irq-qeic.c b/drivers/irqchip/irq-qeic.c
> new file mode 100644
> index 0000000..48ceded
> --- /dev/null
> +++ b/drivers/irqchip/irq-qeic.c
> @@ -0,0 +1,601 @@
> +/*
> + * drivers/irqchip/irq-qeic.c
> + *
> + * Copyright (C) 2016 Freescale Semiconductor, Inc.  All rights reserved.
> + *
> + * Author: Li Yang <leoli@...escale.com>
> + * Based on code from Shlomi Gridish <gridish@...escale.com>
> + *
> + * QUICC ENGINE Interrupt Controller
> + *
> + * This program is free software; you can redistribute  it and/or modify it
> + * under  the terms of  the GNU General  Public License as published by the
> + * Free Software Foundation;  either version 2 of the  License, or (at your
> + * option) any later version.
> + */
> +
> +#include <linux/of_irq.h>
> +#include <linux/of_address.h>
> +#include <linux/kernel.h>
> +#include <linux/init.h>
> +#include <linux/errno.h>
> +#include <linux/reboot.h>
> +#include <linux/slab.h>
> +#include <linux/stddef.h>
> +#include <linux/sched.h>
> +#include <linux/signal.h>
> +#include <linux/device.h>
> +#include <linux/spinlock.h>
> +#include <asm/irq.h>
> +#include <asm/io.h>
> +#include <soc/fsl/qe/qe_ic.h>
> +
> +#define NR_QE_IC_INTS		64
> +
> +/* QE IC registers offset */
> +#define QEIC_CICR		0x00
> +#define QEIC_CIVEC		0x04
> +#define QEIC_CRIPNR		0x08
> +#define QEIC_CIPNR		0x0c
> +#define QEIC_CIPXCC		0x10
> +#define QEIC_CIPYCC		0x14
> +#define QEIC_CIPWCC		0x18
> +#define QEIC_CIPZCC		0x1c
> +#define QEIC_CIMR		0x20
> +#define QEIC_CRIMR		0x24
> +#define QEIC_CICNR		0x28
> +#define QEIC_CIPRTA		0x30
> +#define QEIC_CIPRTB		0x34
> +#define QEIC_CRICR		0x3c
> +#define QEIC_CHIVEC		0x60
> +
> +/* Interrupt priority registers */
> +#define CIPCC_SHIFT_PRI0	29
> +#define CIPCC_SHIFT_PRI1	26
> +#define CIPCC_SHIFT_PRI2	23
> +#define CIPCC_SHIFT_PRI3	20
> +#define CIPCC_SHIFT_PRI4	13
> +#define CIPCC_SHIFT_PRI5	10
> +#define CIPCC_SHIFT_PRI6	7
> +#define CIPCC_SHIFT_PRI7	4
> +
> +/* CICR priority modes */
> +#define CICR_GWCC		0x00040000
> +#define CICR_GXCC		0x00020000
> +#define CICR_GYCC		0x00010000
> +#define CICR_GZCC		0x00080000
> +#define CICR_GRTA		0x00200000
> +#define CICR_GRTB		0x00400000
> +#define CICR_HPIT_SHIFT		8
> +#define CICR_HPIT_MASK		0x00000300
> +#define CICR_HP_SHIFT		24
> +#define CICR_HP_MASK		0x3f000000
> +
> +/* CICNR */
> +#define CICNR_WCC1T_SHIFT	20
> +#define CICNR_ZCC1T_SHIFT	28
> +#define CICNR_YCC1T_SHIFT	12
> +#define CICNR_XCC1T_SHIFT	4
> +
> +/* CRICR */
> +#define CRICR_RTA1T_SHIFT	20
> +#define CRICR_RTB1T_SHIFT	28
> +
> +/* Signal indicator */
> +#define SIGNAL_MASK		3
> +#define SIGNAL_HIGH		2
> +#define SIGNAL_LOW		0
> +
> +struct qe_ic {
> +	/* Control registers offset */
> +	volatile u32 __iomem *regs;
> +
> +	/* The remapper for this QEIC */
> +	struct irq_domain *irqhost;
> +
> +	/* The "linux" controller struct */
> +	struct irq_chip hc_irq;
> +
> +	/* VIRQ numbers of QE high/low irqs */
> +	unsigned int virq_high;
> +	unsigned int virq_low;
> +};
> +
> +/*
> + * QE interrupt controller internal structure
> + */
> +struct qe_ic_info {
> +	/* location of this source at the QIMR register. */
> +	u32	mask;
> +
> +	/* Mask register offset */
> +	u32	mask_reg;
> +
> +	/*
> +	 * for grouped interrupts sources - the interrupt
> +	 * code as appears at the group priority register
> +	 */
> +	u8	pri_code;
> +
> +	/* Group priority register offset */
> +	u32	pri_reg;
> +};
> +
> +static DEFINE_RAW_SPINLOCK(qe_ic_lock);
> +
> +static struct qe_ic_info qe_ic_info[] = {
> +	[1] = {
> +	       .mask = 0x00008000,

Please write those single-bit constants as BIT(x), as it makes the code
much more readable.

	M.
-- 
Jazz is not dead. It just smells funny...