linux-kernel - Re: [PATCH 1/5] mfd: Add driver for Maxim 77802 Power Management IC

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Date:	Mon, 09 Jun 2014 12:22:41 +0200
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc:	Lee Jones <lee.jones@...aro.org>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Mike Turquette <mturquette@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Liam Girdwood <lgirdwood@...il.com>,
	Doug Anderson <dianders@...omium.org>,
	linux-samsung-soc@...r.kernel.org,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Mark Brown <broonie@...nel.org>,
	Olof Johansson <olof@...om.net>,
	linux-arm-kernel@...ts.infradead.org,
	Daniel Stone <daniels@...labora.com>
Subject: Re: [PATCH 1/5] mfd: Add driver for Maxim 77802 Power Management IC

On pon, 2014-06-09 at 11:37 +0200, Javier Martinez Canillas wrote:
> Maxim MAX77802 is a power management chip that contains 10 high
> efficiency Buck regulators, 32 Low-dropout (LDO) regulators used
> to power up application processors and peripherals, a 2-channel
> 32kHz clock outputs, a Real-Time-Clock (RTC) and a I2C interface
> to program the individual regulators, clocks outputs and the RTC.
> 
> This patch adds the core support for MAX77802 PMIC and is based
> on a driver added by Simon Glass to the Chrome OS kernel 3.8 tree.
> 
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>

(...)


> diff --git a/drivers/mfd/max77802-irq.c b/drivers/mfd/max77802-irq.c
> new file mode 100644
> index 0000000..38a8ce7
> --- /dev/null
> +++ b/drivers/mfd/max77802-irq.c
> @@ -0,0 +1,332 @@
> +/*
> + * max77802-irq.c - Interrupt controller support for MAX77802
> + *
> + * Copyright (C) 2013-2014 Google, Inc
> + *
> + * Copyright (C) 2012 Samsung Electronics Co.Ltd
> + * Chiwoong Byun <woong.byun@...sung.com>
> + *
> + * 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.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * This driver is based on max8997-irq.c
> + */
> +
> +#include <linux/err.h>
> +#include <linux/irq.h>
> +#include <linux/interrupt.h>
> +#include <linux/gpio.h>
> +#include <linux/mfd/max77802.h>
> +#include <linux/mfd/max77802-private.h>
> +#include <linux/irqdomain.h>
> +#include <linux/regmap.h>
> +
> +enum {
> +	MAX77802_DEBUG_IRQ_INFO = 1 << 0,
> +	MAX77802_DEBUG_IRQ_MASK = 1 << 1,
> +	MAX77802_DEBUG_IRQ_INT = 1 << 2,
> +};
> +
> +static int debug_mask = 0;
> +module_param(debug_mask, int, 0);
> +MODULE_PARM_DESC(debug_mask, "Set debug_mask : 0x0=off 0x1=IRQ_INFO  0x2=IRQ_MASK 0x4=IRQ_INI)");
> +
> +static const u8 max77802_mask_reg[] = {
> +	[PMIC_INT1] = MAX77802_REG_INT1MSK,
> +	[PMIC_INT2] = MAX77802_REG_INT2MSK,
> +	[RTC_INT] = MAX77802_RTC_INTM,
> +};
> +
> +struct max77802_irq_data {
> +	int mask;
> +	enum max77802_irq_source group;
> +};
> +
> +#define DECLARE_IRQ(idx, _group, _mask)		\
> +	[(idx)] = { .group = (_group), .mask = (_mask) }
> +static const struct max77802_irq_data max77802_irqs[] = {
> +	DECLARE_IRQ(MAX77802_PMICIRQ_PWRONF,	PMIC_INT1, 1 << 0),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_PWRONR,	PMIC_INT1, 1 << 1),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_JIGONBF,	PMIC_INT1, 1 << 2),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_JIGONBR,	PMIC_INT1, 1 << 3),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_ACOKBF,	PMIC_INT1, 1 << 4),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_ACOKBR,	PMIC_INT1, 1 << 5),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_ONKEY1S,	PMIC_INT1, 1 << 6),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_MRSTB,		PMIC_INT1, 1 << 7),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_140C,		PMIC_INT2, 1 << 0),
> +	DECLARE_IRQ(MAX77802_PMICIRQ_120C,		PMIC_INT2, 1 << 1),
> +	DECLARE_IRQ(MAX77802_RTCIRQ_RTC60S,		RTC_INT, 1 << 0),
> +	DECLARE_IRQ(MAX77802_RTCIRQ_RTCA1,		RTC_INT, 1 << 1),
> +	DECLARE_IRQ(MAX77802_RTCIRQ_RTCA2,		RTC_INT, 1 << 2),
> +	DECLARE_IRQ(MAX77802_RTCIRQ_SMPL,		RTC_INT, 1 << 3),
> +	DECLARE_IRQ(MAX77802_RTCIRQ_RTC1S,		RTC_INT, 1 << 4),
> +	DECLARE_IRQ(MAX77802_RTCIRQ_WTSR,		RTC_INT, 1 << 5),
> +};

Why just not use two regmap_irq_chips (for PMIC and RTC blocks)
replacing whole max77802-irq.c file?

Best regards,
Krzysztof


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