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regulator: rpmh-regulator: add support for disable-mode

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For some RPMh LDO regulators, the clients do not vote for load
current from HLOS, as the regulators receive mode votes from
some other subsystems. In these cases, if there is an init-mode
vote for HPM from HLOS, it may never be removed by any clients,
even when the LDO is disabled, leading to higher power consumption.

Add support to specify setting a default mode for LDOs when
they get disabled and removing it when they get reenabled,
to avoid unexpected high power consumption when they are
disabled.

Change-Id: I9d007534f5f3b9aad52a00ad31ac72c4148de6e6
Signed-off-by: Jishnu Prakash <quic_jprakash@quicinc.com>
This commit is contained in:
Jishnu Prakash 2022-07-28 12:22:48 +05:30 committed by Anjelique Melendez
parent 3debd0f907
commit 027e77d801
1 changed files with 39 additions and 1 deletions
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40
drivers/regulator/rpmh-regulator.c
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@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2016-2021, The Linux Foundation. All rights reserved. */
/* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved. */
#define pr_fmt(fmt) "%s: " fmt, __func__
@ -204,6 +205,8 @@ struct rpmh_vreg;
* @mode: An array of modes supported by an RPMh VRM
* regulator resource.
* @mode_count: The number of entries in the mode array.
* @disable_pmic_mode: PMIC mode optionally set when aggregated regulator resource
* gets disabled, overriding existing aggregated mode.
* @aggr_req_active: Aggregated active set RPMh accelerator register
* request
* @aggr_req_sleep: Aggregated sleep set RPMh accelerator register
@ -225,6 +228,7 @@ struct rpmh_aggr_vreg {
int vreg_count;
struct rpmh_regulator_mode *mode;
int mode_count;
int disable_pmic_mode;
struct rpmh_regulator_request aggr_req_active;
struct rpmh_regulator_request aggr_req_sleep;
};
@ -630,6 +634,20 @@ static void rpmh_regulator_handle_arc_enable(struct rpmh_aggr_vreg *aggr_vreg,
req->valid &= ~BIT(RPMH_REGULATOR_REG_ARC_PSEUDO_ENABLE);
}
static void rpmh_regulator_handle_disable_mode(struct rpmh_aggr_vreg *aggr_vreg,
struct rpmh_regulator_request *req)
{
if (aggr_vreg->regulator_type != RPMH_REGULATOR_TYPE_VRM
|| aggr_vreg->disable_pmic_mode <= 0)
return;
if ((req->valid & BIT(RPMH_REGULATOR_REG_ENABLE))
&& !req->reg[RPMH_REGULATOR_REG_ENABLE]) {
req->reg[RPMH_REGULATOR_REG_VRM_MODE] = aggr_vreg->disable_pmic_mode;
req->valid |= RPMH_REGULATOR_REG_VRM_MODE;
}
}
/**
* rpmh_regulator_aggregate_requests() - aggregate the requests from all
* regulators associated with an RPMh resource
@ -672,6 +690,8 @@ static void rpmh_regulator_aggregate_requests(struct rpmh_aggr_vreg *aggr_vreg,
rpmh_regulator_handle_arc_enable(aggr_vreg, req_active);
rpmh_regulator_handle_arc_enable(aggr_vreg, req_sleep);
rpmh_regulator_handle_disable_mode(aggr_vreg, req_active);
rpmh_regulator_handle_disable_mode(aggr_vreg, req_sleep);
}
/**
@ -1340,9 +1360,10 @@ static int rpmh_regulator_parse_vrm_modes(struct rpmh_aggr_vreg *aggr_vreg)
const struct rpmh_regulator_mode *map;
const char *prop;
int i, len, rc;
u32 *buf;
u32 *buf, disable_mode;
aggr_vreg->regulator_hw_type = RPMH_REGULATOR_HW_TYPE_UNKNOWN;
aggr_vreg->disable_pmic_mode = -EINVAL;
/* qcom,regulator-type is optional */
prop = "qcom,regulator-type";
@ -1388,6 +1409,23 @@ static int rpmh_regulator_parse_vrm_modes(struct rpmh_aggr_vreg *aggr_vreg)
map = rpmh_regulator_mode_map[aggr_vreg->regulator_hw_type];
prop = "qcom,disable-mode";
if (!of_property_read_u32(node, prop, &disable_mode)) {
if (disable_mode >= RPMH_REGULATOR_MODE_COUNT) {
aggr_vreg_err(aggr_vreg, "qcom,disable-mode value %u is invalid\n",
disable_mode);
return -EINVAL;
}
if (!map[disable_mode].framework_mode) {
aggr_vreg_err(aggr_vreg, "qcom,disable-mode value %u is invalid for regulator type = %s\n",
disable_mode, type);
return -EINVAL;
}
aggr_vreg->disable_pmic_mode = map[disable_mode].pmic_mode;
}
/* qcom,supported-modes is optional */
prop = "qcom,supported-modes";
if (!of_find_property(node, prop, &len))