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Commit 268cfeff authored by David Collins's avatar David Collins
Browse files

mfd: qcom-spmi-pmic: add support for slow SPMI busses 



Add device tree support for configuring if mutexes or spinlocks
should be used in the regmap configuration (i.e. the fast_io
element value).  This ensures that qcom-spmi-pmic slave devices
can be used with SPMI busses that must operate in process
context.

Change-Id: I3abdee36935457db497ce6ff2a242755fc3aff90
Signed-off-by: default avatarDavid Collins <collinsd@codeaurora.org>
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 3d15b509

drivers/mfd/qcom-spmi-pmic.c

+15 −13
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.

 */

// SPDX-License-Identifier: GPL-2.0

/* Copyright (c) 2014, 2017-2018, The Linux Foundation. All rights reserved. */



#include <linux/kernel.h>

#include <linux/module.h>
@@ -124,10 +114,22 @@ static const struct regmap_config spmi_regmap_config = { 
	.fast_io	= true,

};



static const struct regmap_config spmi_regmap_can_sleep_config = {

	.reg_bits	= 16,

	.val_bits	= 8,

	.max_register	= 0xffff,

	.fast_io	= false,

};



static int pmic_spmi_probe(struct spmi_device *sdev)

{

	struct device_node *root = sdev->dev.of_node;

	struct regmap *regmap;



	if (of_property_read_bool(root, "qcom,can-sleep"))

		regmap = devm_regmap_init_spmi_ext(sdev,

						&spmi_regmap_can_sleep_config);

	else

		regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);

	if (IS_ERR(regmap))

		return PTR_ERR(regmap);