From a4d2754961c200bba633aa5c325af58a37a29a57 Mon Sep 17 00:00:00 2001 From: David Collins Date: Fri, 11 May 2018 20:01:34 -0700 Subject: [PATCH] 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: David Collins Signed-off-by: Subbaraman Narayanamurthy --- drivers/mfd/qcom-spmi-pmic.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/mfd/qcom-spmi-pmic.c b/drivers/mfd/qcom-spmi-pmic.c index e8fe705073fa..f1da3aa6d6d5 100644 --- a/drivers/mfd/qcom-spmi-pmic.c +++ b/drivers/mfd/qcom-spmi-pmic.c @@ -1,7 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (c) 2014, The Linux Foundation. All rights reserved. - */ +/* Copyright (c) 2014, 2017-2018, The Linux Foundation. All rights reserved. */ #include #include @@ -116,11 +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);