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

Commit 0ff9e291 authored by Dmitry Shmidt's avatar Dmitry Shmidt Committed by Amit Pundir
Browse files

ANDROID: fiq_debugger: Add option to apply uart overlay by FIQ_DEBUGGER_UART_OVERLAY 



fiq_debugger is taking over uart, so it is necessary to disable
original uart in DT file. It can be done manually or by overlay.

Change-Id: I9f50ec15b0e22e602d73b9f745fc8666f8925d09
Signed-off-by: default avatarDmitry Shmidt <dimitrysh@google.com>
parent 9c027e6c

drivers/staging/android/fiq_debugger/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -42,6 +42,15 @@ config FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE 
	  If enabled, this puts the fiq debugger into console mode by default.

	  Otherwise, the fiq debugger will start out in debug mode.



config FIQ_DEBUGGER_UART_OVERLAY

	bool "Install uart DT overlay"

	depends on FIQ_DEBUGGER

	select OF_OVERLAY

	default n

	help

	  If enabled, fiq debugger is calling fiq_debugger_uart_overlay()

	  that will apply overlay uart_overlay@0 to disable proper uart.



config FIQ_WATCHDOG

	bool

	select FIQ_DEBUGGER

drivers/staging/android/fiq_debugger/fiq_debugger.c

+30 −0
Original line number Diff line number Diff line
@@ -39,6 +39,10 @@ 
#include <asm/fiq_glue.h>

#endif



#ifdef CONFIG_FIQ_DEBUGGER_UART_OVERLAY

#include <linux/of.h>

#endif



#include <linux/uaccess.h>



#include "fiq_debugger.h"
@@ -1201,10 +1205,36 @@ static struct platform_driver fiq_debugger_driver = { 
	},

};



#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)

int fiq_debugger_uart_overlay(void)

{

	struct device_node *onp = of_find_node_by_path("/uart_overlay@0");

	int ret;



	if (!onp) {

		pr_err("serial_debugger: uart overlay not found\n");

		return -ENODEV;

	}



	ret = of_overlay_create(onp);

	if (ret < 0) {

		pr_err("serial_debugger: fail to create overlay: %d\n", ret);

		of_node_put(onp);

		return ret;

	}



	pr_info("serial_debugger: uart overlay applied\n");

	return 0;

}

#endif



static int __init fiq_debugger_init(void)

{

#if defined(CONFIG_FIQ_DEBUGGER_CONSOLE)

	fiq_debugger_tty_init();

#endif

#if defined(CONFIG_FIQ_DEBUGGER_UART_OVERLAY)

	fiq_debugger_uart_overlay();

#endif

	return platform_driver_register(&fiq_debugger_driver);

}