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

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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: David Collins <collinsd@codeaurora.org>
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
David Collins 2017-06-08 17:09:12 -07:00
parent 3d15b509cd
commit 268cfeffd3
1 changed files with 15 additions and 13 deletions

28
drivers/mfd/qcom-spmi-pmic.c
View file

@ -1,15 +1,5 @@
/*
* 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>
@ -124,11 +114,23 @@ 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;
regmap = devm_regmap_init_spmi_ext(sdev, &spmi_regmap_config);
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);