Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c71d7430 authored by Hanumant Singh's avatar Hanumant Singh
Browse files

gpio: msm: Add support for configuring subsystem id 



The id of the subsystem to which gpio interrupts are routed
can vary from one SOC to the next. Generally for a given TLMM
block this id remains constant. Allow device tree to override
processor id, if different from default value.

CRs-fixed: 554403
Change-Id: I76b4f08affc5f2df1d66bb33052acbffc501f92c
Signed-off-by: default avatarHanumant Singh <hanumant@codeaurora.org>
parent 62b084ce

Documentation/devicetree/bindings/gpio/gpio-msm.txt

+2 −0
Original line number Diff line number Diff line
@@ -13,6 +13,8 @@ Required properties: 
- ngpio : Specify the number of MSM GPIOs

- qcom,direct-connect-irqs : Specifies the number of GPIOs that can be used as

  direct connect interrupts

Optional properties:

- qcom,subsys-id: subsystem id to which gpio interrupts must be routed



Example:

drivers/gpio/gpio-msm-common.c

+4 −0
Original line number Diff line number Diff line
@@ -684,6 +684,7 @@ int __init msm_gpio_of_init(struct device_node *node, 
			    struct device_node *parent)

{

	int ngpio, ret;

	u32 subsys_id;



	ret = of_property_read_u32(node, "ngpio", &ngpio);

	if (ret) {
@@ -696,6 +697,9 @@ int __init msm_gpio_of_init(struct device_node *node, 
		WARN(1, "Cannot allocate irq_domain\n");

		return -ENOMEM;

	}

	ret = of_property_read_u32(node, "qcom,subsys-id", &subsys_id);

	if (!ret)

		__msm_gpio_set_subsys_id(subsys_id);

	return 0;

}

#endif

drivers/gpio/gpio-msm-common.h

+10 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2012, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2013, 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
@@ -27,4 +27,13 @@ void __msm_gpio_set_intr_cfg_type(unsigned gpio, unsigned type); 
void __gpio_tlmm_config(unsigned config);

void __msm_gpio_install_direct_irq(unsigned gpio, unsigned irq,

					unsigned int input_polarity);

#ifdef CONFIG_OF

void __msm_gpio_set_subsys_id(unsigned id);

#else

static inline void __msm_gpio_set_subsys_id(unsigned id)

{

	return;

}

#endif

#endif

drivers/gpio/gpio-msm-v3.c

+9 −2
Original line number Diff line number Diff line 
/* Copyright (c) 2012, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2013, 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
@@ -62,6 +62,8 @@ enum { 
	DC_POLARITY_BIT	= 8,

};



/* Default id of application processor subsystem */

static unsigned subsys_id = 4;

/*

 * When a GPIO triggers, two separate decisions are made, controlled

 * by two separate flags.
@@ -80,7 +82,7 @@ enum { 
#define INTR_DIR_CONN_EN   BIT(INTR_DIR_CONN_EN_BIT)

#define DC_POLARITY_HI     BIT(DC_POLARITY_BIT)



#define INTR_TARGET_PROC_APPS    (4 << INTR_TARGET_PROC_BIT)

#define INTR_TARGET_PROC_APPS    (subsys_id << INTR_TARGET_PROC_BIT)

#define INTR_TARGET_PROC_NONE    (7 << INTR_TARGET_PROC_BIT)



#define INTR_DECT_CTL_LEVEL      (0 << INTR_DECT_CTL_BIT)
@@ -202,6 +204,11 @@ void __msm_gpio_set_intr_cfg_type(unsigned gpio, unsigned type) 
	udelay(5);

}



void __msm_gpio_set_subsys_id(unsigned id)

{

	subsys_id = id;

}



void __gpio_tlmm_config(unsigned config)

{

	unsigned flags;