All of lore.kernel.org
 help / color / mirror / Atom feed
From: Rajendra Nayak <rnayak@codeaurora.org>
To: agross@kernel.org, bjorn.andersson@linaro.org,
	srinivas.kandagatla@linaro.org, robh+dt@kernel.org
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, rbokka@codeaurora.org,
	Rajendra Nayak <rnayak@codeaurora.org>
Subject: [PATCH 2/3] nvmem: qfprom: sc7280: Handle the additional power-domains vote
Date: Thu, 22 Jul 2021 10:58:35 +0530	[thread overview]
Message-ID: <1626931716-10591-3-git-send-email-rnayak@codeaurora.org> (raw)
In-Reply-To: <1626931716-10591-1-git-send-email-rnayak@codeaurora.org>

On sc7280, to reliably blow fuses, we need an additional vote
on max performance state of 'MX' power-domain.
Add support for power-domain performance state voting in the
driver.

Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
---
 drivers/nvmem/qfprom.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index 81fbad5..4d0a576 100644
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c
@@ -12,6 +12,8 @@
 #include <linux/mod_devicetable.h>
 #include <linux/nvmem-provider.h>
 #include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
 #include <linux/property.h>
 #include <linux/regulator/consumer.h>
 
@@ -149,6 +151,11 @@ static void qfprom_disable_fuse_blowing(const struct qfprom_priv *priv,
 	if (ret)
 		dev_warn(priv->dev, "Failed to set 0 voltage (ignoring)\n");
 
+	if (priv->dev->pm_domain) {
+		dev_pm_genpd_set_performance_state(priv->dev, 0);
+		pm_runtime_put(priv->dev);
+	}
+
 	ret = regulator_disable(priv->vcc);
 	if (ret)
 		dev_warn(priv->dev, "Failed to disable regulator (ignoring)\n");
@@ -212,6 +219,16 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv,
 		goto err_clk_rate_set;
 	}
 
+	if (priv->dev->pm_domain) {
+		ret = pm_runtime_get_sync(priv->dev);
+		if (ret < 0) {
+			pm_runtime_put_noidle(priv->dev);
+			dev_err(priv->dev, "Failed to enable power-domain\n");
+			goto err_reg_enable;
+		}
+		dev_pm_genpd_set_performance_state(priv->dev, INT_MAX);
+	}
+
 	old->timer_val = readl(priv->qfpconf + QFPROM_BLOW_TIMER_OFFSET);
 	old->accel_val = readl(priv->qfpconf + QFPROM_ACCEL_OFFSET);
 	writel(priv->soc_data->qfprom_blow_timer_value,
@@ -221,6 +238,8 @@ static int qfprom_enable_fuse_blowing(const struct qfprom_priv *priv,
 
 	return 0;
 
+err_reg_enable:
+	regulator_disable(priv->vcc);
 err_clk_rate_set:
 	clk_set_rate(priv->secclk, old->clk_rate);
 err_clk_prepared:
@@ -420,6 +439,9 @@ static int qfprom_probe(struct platform_device *pdev)
 			econfig.reg_write = qfprom_reg_write;
 	}
 
+	if (dev->pm_domain)
+		pm_runtime_enable(dev);
+
 	nvmem = devm_nvmem_register(dev, &econfig);
 
 	return PTR_ERR_OR_ZERO(nvmem);
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation


  parent reply	other threads:[~2021-07-22  5:29 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-22  5:28 [PATCH 0/3] nvmem: qfprom: Add binding updates and power-domain handling Rajendra Nayak
2021-07-22  5:28 ` [PATCH 1/3] dt-bindings: nvmem: qfprom: Add optional power-domains property Rajendra Nayak
2021-07-22  5:28 ` Rajendra Nayak [this message]
2021-07-23 16:43   ` [PATCH 2/3] nvmem: qfprom: sc7280: Handle the additional power-domains vote Doug Anderson
2021-07-27 12:20     ` Rajendra Nayak
2021-07-22  5:28 ` [PATCH 3/3] arm64: dts: qcom: sc7280: Add qfprom node Rajendra Nayak

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1626931716-10591-3-git-send-email-rnayak@codeaurora.org \
    --to=rnayak@codeaurora.org \
    --cc=agross@kernel.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=devicetree@vger.kernel.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rbokka@codeaurora.org \
    --cc=robh+dt@kernel.org \
    --cc=srinivas.kandagatla@linaro.org \
    --subject='Re: [PATCH 2/3] nvmem: qfprom: sc7280: Handle the additional power-domains vote' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.