[PATCH v1 10/15] ath10k: add support for pwrseq sequencing

Dmitry Baryshkov
2021-10-06T03:55:09Z

Power sequencing for Qualcomm WiFi+BT chipsets are being reworked to use
pwrseq rather than individually handling all the regulators. Add support
for pwrseq to ath10k SNOC driver.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
drivers/net/wireless/ath/ath10k/snoc.c | 45 +++++++++++++-------------
drivers/net/wireless/ath/ath10k/snoc.h | 4 +--
2 files changed, 25 insertions(+), 24 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c
index ea00fbb15601..8578c56982df 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.c
+++ b/drivers/net/wireless/ath/ath10k/snoc.c
@@ -14,6 +14,7 @@
#include <linux/regulator/consumer.h>
#include <linux/of_address.h>
#include <linux/iommu.h>
+#include <linux/pwrseq/consumer.h>

#include "ce.h"
#include "coredump.h"
@@ -41,14 +42,6 @@ static char *const ce_name[] = {
"WLAN_CE_11",
};

-static const char * const ath10k_regulators[] = {
- "vdd-0.8-cx-mx",
- "vdd-1.8-xo",
- "vdd-1.3-rfa",
- "vdd-3.3-ch0",
- "vdd-3.3-ch1",
-};
-
static const char * const ath10k_clocks[] = {
"cxo_ref_clk_pin", "qdss",
};
@@ -1010,10 +1003,14 @@ 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_full_power_on(ar_snoc->pwrseq);
if (ret)
return ret;

+ ret = regulator_enable(ar_snoc->vreg_cx_mx);
+ if (ret)
+ goto vreg_pwrseq_off;
+
ret = clk_bulk_prepare_enable(ar_snoc->num_clks, ar_snoc->clks);
if (ret)
goto vreg_off;
@@ -1021,11 +1018,14 @@ static int ath10k_hw_power_on(struct ath10k *ar)
return ret;

vreg_off:
- regulator_bulk_disable(ar_snoc->num_vregs, ar_snoc->vregs);
+ regulator_disable(ar_snoc->vreg_cx_mx);
+vreg_pwrseq_off:
+ pwrseq_power_off(ar_snoc->pwrseq);
+
return ret;
}

-static int ath10k_hw_power_off(struct ath10k *ar)
+static void ath10k_hw_power_off(struct ath10k *ar)
{
struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar);

@@ -1033,7 +1033,9 @@ static int ath10k_hw_power_off(struct ath10k *ar)

clk_bulk_disable_unprepare(ar_snoc->num_clks, ar_snoc->clks);

- return regulator_bulk_disable(ar_snoc->num_vregs, ar_snoc->vregs);
+ regulator_disable(ar_snoc->vreg_cx_mx);
+
+ pwrseq_power_off(ar_snoc->pwrseq);
}

static void ath10k_snoc_wlan_disable(struct ath10k *ar)
@@ -1691,20 +1693,19 @@ static int ath10k_snoc_probe(struct platform_device *pdev)
goto err_release_resource;
}

- ar_snoc->num_vregs = ARRAY_SIZE(ath10k_regulators);
- ar_snoc->vregs = devm_kcalloc(&pdev->dev, ar_snoc->num_vregs,
- sizeof(*ar_snoc->vregs), GFP_KERNEL);
- if (!ar_snoc->vregs) {
- ret = -ENOMEM;
+ ar_snoc->pwrseq = devm_pwrseq_get(&pdev->dev, "wifi");
+ if (IS_ERR(ar_snoc->pwrseq)) {
+ ret = PTR_ERR(ar_snoc->pwrseq);
+ if (ret != -EPROBE_DEFER)
+ ath10k_warn(ar, "failed to acquire pwrseq: %d\n", ret);
goto err_free_irq;
}
- for (i = 0; i < ar_snoc->num_vregs; i++)
- ar_snoc->vregs[i].supply = ath10k_regulators[i];

- ret = devm_regulator_bulk_get(&pdev->dev, ar_snoc->num_vregs,
- ar_snoc->vregs);
- if (ret < 0)
+ ar_snoc->vreg_cx_mx = devm_regulator_get(&pdev->dev, "vdd-0.8-cx-mx");
+ if (IS_ERR(ar_snoc->vreg_cx_mx)) {
+ ret = PTR_ERR(ar_snoc->vreg_cx_mx);
goto err_free_irq;
+ }

ar_snoc->num_clks = ARRAY_SIZE(ath10k_clocks);
ar_snoc->clks = devm_kcalloc(&pdev->dev, ar_snoc->num_clks,
diff --git a/drivers/net/wireless/ath/ath10k/snoc.h b/drivers/net/wireless/ath/ath10k/snoc.h
index 5095d1893681..5188d6f6f850 100644
--- a/drivers/net/wireless/ath/ath10k/snoc.h
+++ b/drivers/net/wireless/ath/ath10k/snoc.h
@@ -70,10 +70,10 @@ struct ath10k_snoc {
struct ath10k_snoc_ce_irq ce_irqs[CE_COUNT_MAX];
struct ath10k_ce ce;
struct timer_list rx_post_retry;
- struct regulator_bulk_data *vregs;
- size_t num_vregs;
+ struct regulator *vreg_cx_mx;
struct clk_bulk_data *clks;
size_t num_clks;
+ struct pwrseq *pwrseq;
struct ath10k_qmi *qmi;
unsigned long flags;
bool xo_cal_supported;
--
2.33.0