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Commit c831d048 authored by Abhijeet Dharmapurikar's avatar Abhijeet Dharmapurikar
Browse files

irqchip: irq-msm: Introduce irq-msm driver 



Prepare for irqchip_init() to initialize irq controllers. The
IRQCHIP_DECLARE macro inserts a function pointer in __irqchip_of_table
section and the kernel runs through it calling each irq controllers
initialization function - the kernel respects the parent irq controller
ordering and ensures that a parent irq controller's init function is
called prior to its child irq controllers.

This driver serves the purpose of being able to declare various irq
controllers in MSM/APQ/FSM platforms using IRQCHIP_DECLARE macro.

MPM hardware monitors certain interrupt lines on GIC and GPIO while
apps is power collapsed. It needs to be initialized right after GPIO
is initialized.

Change-Id: I3ab333dbb428932df060a682c0930f1e61ffe45b
Signed-off-by: default avatarAbhijeet Dharmapurikar <adharmap@codeaurora.org>
parent d2056c0d

drivers/irqchip/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -46,3 +46,7 @@ config VERSATILE_FPGA_IRQ_NR 
       int

       default 4

       depends on VERSATILE_FPGA_IRQ



config MSM_IRQ

	bool

	select IRQ_DOMAIN

drivers/irqchip/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -16,3 +16,4 @@ obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o 
obj-$(CONFIG_RENESAS_IRQC)		+= irq-renesas-irqc.o

obj-$(CONFIG_VERSATILE_FPGA_IRQ)	+= irq-versatile-fpga.o

obj-$(CONFIG_ARCH_VT8500)		+= irq-vt8500.o

obj-$(CONFIG_MSM_IRQ)			+= irq-msm.o

drivers/irqchip/irq-msm.c

0 → 100644
+50 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * 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.

 */



#include <linux/irqchip/qpnp-int.h>

#include <linux/irqchip/msm-gpio-irq.h>

#include <linux/irqchip/msm-mpm-irq.h>

#include <linux/mfd/wcd9xxx/core.h>

#include "irqchip.h"



static int __init irq_msm_gpio_init(struct device_node *node,

			struct device_node *parent)

{

	int rc;



#ifdef CONFIG_USE_PINCTRL_IRQ

	rc = msm_tlmm_v3_of_irq_init(node, parent);

#else

	rc = msm_gpio_of_init(node, parent);

#endif

	if (rc) {

		pr_err("Couldn't initlialize gpio irq rc = %d\n", rc);

		return rc;

	}



	/*

	 * Initialize the mpm after gpio (and gic) are initialized. Note that

	 * gpio irq controller is the child of gic irq controller, hence gic's

	 * init function will be called prior to gpio.

	 */

	of_mpm_init();



	return 0;

}



#ifdef CONFIG_USE_PINCTRL_IRQ

IRQCHIP_DECLARE(tlmm_irq, "qcom,msm-tlmmv3-gp-intc", irq_msm_gpio_init);

#else

IRQCHIP_DECLARE(tlmm_irq, "qcom,msm-gpio", irq_msm_gpio_init);

#endif

IRQCHIP_DECLARE(qpnp_irq, "qcom,spmi-pmic-arb", qpnpint_of_init);

IRQCHIP_DECLARE(wcd9xxx_irq, "qcom,wcd9xxx-irq", wcd9xxx_irq_of_init);