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wifi: ath10k: snoc: support powering on the device via pwrseq

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The WCN39xx family of WiFi/BT chips incorporates a simple PMU, spreading
voltages over internal rails. Implement support for using powersequencer
for this family of ATH10k devices in addition to using regulators.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://patch.msgid.link/20260119-wcn3990-pwrctl-v3-3-948df19f5ec2@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov 2026-01-19 19:07:57 +02:00 committed by Jeff Johnson
parent c30e188bd2
commit afcf3ec615
2 changed files with 53 additions and 3 deletions
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53
drivers/net/wireless/ath/ath10k/snoc.c
View File

@ -1,6 +1,7 @@
// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2018 The Linux Foundation. All rights reserved.
* Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
*/
#include <linux/bits.h>
@ -11,6 +12,7 @@
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/pwrseq/consumer.h>
#include <linux/regulator/consumer.h>
#include <linux/remoteproc/qcom_rproc.h>
#include <linux/of_reserved_mem.h>
@ -1023,10 +1025,14 @@ static int ath10k_hw_power_on(struct ath10k *ar)
ath10k_dbg(ar, ATH10K_DBG_SNOC, "soc power on\n");
ret = regulator_bulk_enable(ar_snoc->num_vregs, ar_snoc->vregs);
ret = pwrseq_power_on(ar_snoc->pwrseq);
if (ret)
return ret;
ret = regulator_bulk_enable(ar_snoc->num_vregs, ar_snoc->vregs);
if (ret)
goto pwrseq_off;
ret = clk_bulk_prepare_enable(ar_snoc->num_clks, ar_snoc->clks);
if (ret)
goto vreg_off;
@ -1035,18 +1041,28 @@ static int ath10k_hw_power_on(struct ath10k *ar)
vreg_off:
regulator_bulk_disable(ar_snoc->num_vregs, ar_snoc->vregs);
pwrseq_off:
pwrseq_power_off(ar_snoc->pwrseq);
return ret;
}
static int ath10k_hw_power_off(struct ath10k *ar)
{
struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);
int ret_seq = 0;
int ret_vreg;
ath10k_dbg(ar, ATH10K_DBG_SNOC, "soc power off\n");
clk_bulk_disable_unprepare(ar_snoc->num_clks, ar_snoc->clks);
return regulator_bulk_disable(ar_snoc->num_vregs, ar_snoc->vregs);
ret_vreg = regulator_bulk_disable(ar_snoc->num_vregs, ar_snoc->vregs);
if (ar_snoc->pwrseq)
ret_seq = pwrseq_power_off(ar_snoc->pwrseq);
return ret_vreg ? : ret_seq;
}
static void ath10k_snoc_wlan_disable(struct ath10k *ar)
@ -1762,7 +1778,38 @@ static int ath10k_snoc_probe(struct platform_device *pdev)
goto err_release_resource;
}
ar_snoc->num_vregs = ARRAY_SIZE(ath10k_regulators);
/*
* devm_pwrseq_get() can return -EPROBE_DEFER in two cases:
* - it is not supposed to be used
* - it is supposed to be used, but the driver hasn't probed yet.
*
* There is no simple way to distinguish between these two cases, but:
* - if it is not supposed to be used, then regulator_bulk_get() will
* return all regulators as expected, continuing the probe
* - if it is supposed to be used, but wasn't probed yet, we will get
* -EPROBE_DEFER from regulator_bulk_get() too.
*
* For backwards compatibility with DTs specifying regulators directly
* rather than using the PMU device, ignore the defer error from
* pwrseq.
*/
ar_snoc->pwrseq = devm_pwrseq_get(&pdev->dev, "wlan");
if (IS_ERR(ar_snoc->pwrseq)) {
ret = PTR_ERR(ar_snoc->pwrseq);
ar_snoc->pwrseq = NULL;
if (ret != -EPROBE_DEFER)
goto err_free_irq;
ar_snoc->num_vregs = ARRAY_SIZE(ath10k_regulators);
} else {
/*
* The first regulator (vdd-0.8-cx-mx) is used to power on part
* of the SoC rather than the PMU on WCN399x, the rest are
* handled via pwrseq.
*/
ar_snoc->num_vregs = 1;
}
ar_snoc->vregs = devm_kcalloc(&pdev->dev, ar_snoc->num_vregs,
sizeof(*ar_snoc->vregs), GFP_KERNEL);
if (!ar_snoc->vregs) {

3
drivers/net/wireless/ath/ath10k/snoc.h
View File

@ -1,6 +1,7 @@
/* SPDX-License-Identifier: ISC */
/*
* Copyright (c) 2018 The Linux Foundation. All rights reserved.
* Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
*/
#ifndef _SNOC_H_
@ -53,6 +54,7 @@ enum ath10k_snoc_flags {
};
struct clk_bulk_data;
struct pwrseq_desc;
struct regulator_bulk_data;
struct ath10k_snoc {
@ -73,6 +75,7 @@ struct ath10k_snoc {
struct ath10k_snoc_ce_irq ce_irqs[CE_COUNT_MAX];
struct ath10k_ce ce;
struct timer_list rx_post_retry;
struct pwrseq_desc *pwrseq;
struct regulator_bulk_data *vregs;
size_t num_vregs;
struct clk_bulk_data *clks;