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power: regulator: scmi: support SCMI multi-channel

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Update SCMI regulator controller driver to get its assigned SCMI channel
during initialization. This change allows SCMI voltage domain protocol
to use a dedicated channel when defined in the DT. The reference is
saved in SCMI regulator controller driver private data.

Cc: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Etienne Carriere 2022-05-31 18:09:27 +02:00 committed by Tom Rini
parent f487a88c64
commit ff33ed32b6
1 changed files with 24 additions and 6 deletions
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30
drivers/power/regulator/scmi_regulator.c
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020-2021 Linaro Limited
* Copyright (C) 2020-2022 Linaro Limited
*/
#define LOG_CATEGORY UCLASS_REGULATOR
@ -25,9 +25,18 @@ struct scmi_regulator_platdata {
u32 domain_id;
};
/**
* struct scmi_regulator_priv - Private data for SCMI voltage regulator
* @channel: Reference to the SCMI channel to use
*/
struct scmi_regulator_priv {
struct scmi_channel *channel;
};
static int scmi_voltd_set_enable(struct udevice *dev, bool enable)
{
struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
struct scmi_regulator_priv *priv = dev_get_priv(dev);
struct scmi_voltd_config_set_in in = {
.domain_id = pdata->domain_id,
.config = enable ? SCMI_VOLTD_CONFIG_ON : SCMI_VOLTD_CONFIG_OFF,
@ -38,7 +47,7 @@ static int scmi_voltd_set_enable(struct udevice *dev, bool enable)
in, out);
int ret;
ret = devm_scmi_process_msg(dev, NULL, &msg);
ret = devm_scmi_process_msg(dev, priv->channel, &msg);
if (ret)
return ret;
@ -52,6 +61,7 @@ static int scmi_voltd_set_enable(struct udevice *dev, bool enable)
static int scmi_voltd_get_enable(struct udevice *dev)
{
struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
struct scmi_regulator_priv *priv = dev_get_priv(dev);
struct scmi_voltd_config_get_in in = {
.domain_id = pdata->domain_id,
};
@ -61,7 +71,7 @@ static int scmi_voltd_get_enable(struct udevice *dev)
in, out);
int ret;
ret = devm_scmi_process_msg(dev, NULL, &msg);
ret = devm_scmi_process_msg(dev, priv->channel, &msg);
if (ret < 0)
return ret;
@ -74,6 +84,7 @@ static int scmi_voltd_get_enable(struct udevice *dev)
static int scmi_voltd_set_voltage_level(struct udevice *dev, int uV)
{
struct scmi_regulator_priv *priv = dev_get_priv(dev);
struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
struct scmi_voltd_level_set_in in = {
.domain_id = pdata->domain_id,
@ -85,7 +96,7 @@ static int scmi_voltd_set_voltage_level(struct udevice *dev, int uV)
in, out);
int ret;
ret = devm_scmi_process_msg(dev, NULL, &msg);
ret = devm_scmi_process_msg(dev, priv->channel, &msg);
if (ret < 0)
return ret;
@ -94,6 +105,7 @@ static int scmi_voltd_set_voltage_level(struct udevice *dev, int uV)
static int scmi_voltd_get_voltage_level(struct udevice *dev)
{
struct scmi_regulator_priv *priv = dev_get_priv(dev);
struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
struct scmi_voltd_level_get_in in = {
.domain_id = pdata->domain_id,
@ -104,7 +116,7 @@ static int scmi_voltd_get_voltage_level(struct udevice *dev)
in, out);
int ret;
ret = devm_scmi_process_msg(dev, NULL, &msg);
ret = devm_scmi_process_msg(dev, priv->channel, &msg);
if (ret < 0)
return ret;
@ -132,6 +144,7 @@ static int scmi_regulator_of_to_plat(struct udevice *dev)
static int scmi_regulator_probe(struct udevice *dev)
{
struct scmi_regulator_platdata *pdata = dev_get_plat(dev);
struct scmi_regulator_priv *priv = dev_get_priv(dev);
struct scmi_voltd_attr_in in = { 0 };
struct scmi_voltd_attr_out out = { 0 };
struct scmi_msg scmi_msg = {
@ -144,10 +157,14 @@ static int scmi_regulator_probe(struct udevice *dev)
};
int ret;
ret = devm_scmi_of_get_channel(dev->parent, &priv->channel);
if (ret)
return ret;
/* Check voltage domain is known from SCMI server */
in.domain_id = pdata->domain_id;
ret = devm_scmi_process_msg(dev, NULL, &scmi_msg);
ret = devm_scmi_process_msg(dev, priv->channel, &scmi_msg);
if (ret) {
dev_err(dev, "Failed to query voltage domain %u: %d\n",
pdata->domain_id, ret);
@ -171,6 +188,7 @@ U_BOOT_DRIVER(scmi_regulator) = {
.probe = scmi_regulator_probe,
.of_to_plat = scmi_regulator_of_to_plat,
.plat_auto = sizeof(struct scmi_regulator_platdata),
.priv_auto = sizeof(struct scmi_regulator_priv *),
};
static int scmi_regulator_bind(struct udevice *dev)