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

Commit d64e27a1 authored by Ramachandran Venkataramani's avatar Ramachandran Venkataramani
Browse files

irqchip: qcom: pdc: Add support for pdc-virt 



Add pdc-virt driver to support using PDC on a virtual platform.

Change-Id: If6d257e8d178e069c8088dd81bc30208c1c7bb6d
Signed-off-by: default avatarRamachandran Venkataramani <ramavenk@codeaurora.org>
parent c8980a40

Documentation/devicetree/bindings/interrupt-controller/qti,pdc.txt

+19 −1
Original line number Diff line number Diff line
@@ -32,7 +32,8 @@ Properties: 
		    "qcom,pdc-sm6150",

	            "qcom,pdc-sm8150",

		    "qcom,pdc-sdxprairie",

	            "qcom,pdc-atoll"

	            "qcom,pdc-atoll",

		    "qcom,pdc-virt"



- reg:

	Usage: required
@@ -58,6 +59,14 @@ Properties: 
	Value type: <bool>

	Definition: Identifies the node as an interrupt controller.



- qcom,pdc-pins:

	Usage: optional

	Value type: <u32 array>

	Definition: Specifies the PDC pin and its mapping hwirq.

			The first element of the tuple is the PDC port.

			The second element is the GIC hwirq number for the PDC port.

			Usage is required when using "qcom,pdc-virt" as compatible.



Example:



pdcgic: interrupt-controller@0xb220000{
@@ -67,3 +76,12 @@ pdcgic: interrupt-controller@0xb220000{ 
	interrupt-parent = <&intc>;

	interrupt-controller;

};



pdcgic: interrupt-controller@0xb220000{

	compatible = "qcom,pdc-virt";

	reg = <0xb220000 0x30000>;

	#interrupt-cells = <3>;

	interrupt-parent = <&intc>;

	interrupt-controller;

	qcom,pdc-pins = <8 520>, <9 521>;

};

drivers/irqchip/qcom/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -58,3 +58,11 @@ config QTI_MPM 
	help

	  QTI MSM Power Manager driver to manage and configure wakeup

	  IRQs.



config QTI_PDC_VIRT

        bool "QTI PDC VIRT"

        select QTI_PDC

        help

          QTI Power Domain Controller for Virtual platforms

	  This is used for managing and configuring

	  the wakeup interrupts on virtual platforms.
 
 No newline at end of file

drivers/irqchip/qcom/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -6,3 +6,4 @@ obj-$(CONFIG_QTI_PDC_SDXPRAIRIE) += pdc-sdxprairie.o 
obj-$(CONFIG_QTI_PDC_ATOLL)		+= pdc-atoll.o

obj-$(CONFIG_QTI_MPM)			+= mpm.o mpm-8937.o mpm-qcs405.o mpm-trinket.o \

					   mpm-9607.o mpm-sdm660.o

obj-$(CONFIG_QTI_PDC_VIRT)		+= pdc-virt.o
 
 No newline at end of file

drivers/irqchip/qcom/pdc-virt.c

0 → 100644
+77 −0
Original line number Diff line number Diff line 
/* Copyright (c) 2020, 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.h>

#include "pdc.h"



static struct pdc_pin *pdc_pins_dt;



static int pdc_read_pin_mapping_from_dt(struct device_node *node)

{

	int ret = 0, n;

	int pdc_pin_count;



	n = of_property_count_elems_of_size(node, "qcom,pdc-pins", sizeof(u32));

	if (n <= 0 || n % 2)

		return -EINVAL;



	pdc_pin_count = n / 2;



	pdc_pins_dt = kcalloc(pdc_pin_count + 1, sizeof(struct pdc_pin),

				GFP_KERNEL);

	if (!pdc_pins_dt)

		return -ENOMEM;



	for (n = 0; n < pdc_pin_count; n++) {

		ret = of_property_read_u32_index(node, "qcom,pdc-pins",

			n * 2,

			&pdc_pins_dt[n].pin);

		if (ret)

			goto err;



		ret = of_property_read_u32_index(node, "qcom,pdc-pins",

			(n * 2) + 1,

			(u32 *)&pdc_pins_dt[n].hwirq);

		if (ret)

			goto err;

	}



	pdc_pins_dt[pdc_pin_count].pin = -1;



	return ret;



err:

	kfree(pdc_pins_dt);

	return ret;

}



static int __init qcom_pdc_gic_init(struct device_node *node,

		struct device_node *parent)

{

	int ret;



	ret = pdc_read_pin_mapping_from_dt(node);

	if (ret) {

		pr_err("%s: Error reading PDC pin mapping: %d\n",

			 __func__, ret);

		return ret;

	}



	ret = qcom_pdc_init(node, parent, pdc_pins_dt);



	pr_info("PDC virt initialized\n");



	return ret;

}



IRQCHIP_DECLARE(pdc_virt, "qcom,pdc-virt", qcom_pdc_gic_init);