linux-kernel - [PATCH v8 26/34] soc/tegra: fuse: Add OPP support

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Message-Id: <20210817012754.8710-27-digetx@gmail.com>
Date:   Tue, 17 Aug 2021 04:27:46 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Peter Chen <peter.chen@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Richard Weinberger <richard@....at>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Lucas Stach <dev@...xeye.de>, Stefan Agner <stefan@...er.ch>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-spi@...r.kernel.org,
        linux-pwm@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org
Subject: [PATCH v8 26/34] soc/tegra: fuse: Add OPP support

Initialize and sync FUSE OPP to set up SoC core voltage vote needed by
FUSE hardware.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/soc/tegra/fuse/fuse-tegra.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
index f2151815db58..d1b66cd9339d 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -13,6 +13,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
+#include <linux/pm_opp.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/sys_soc.h>
@@ -213,6 +214,10 @@ static int tegra_fuse_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(&pdev->dev);
 
+	err = devm_tegra_core_dev_init_opp_table_simple(&pdev->dev);
+	if (err)
+		goto restore;
+
 	if (fuse->soc->probe) {
 		err = fuse->soc->probe(fuse);
 		if (err < 0)
@@ -259,6 +264,12 @@ static int __maybe_unused tegra_fuse_runtime_resume(struct device *dev)
 {
 	int err;
 
+	err = dev_pm_opp_sync(dev);
+	if (err) {
+		dev_err(dev, "failed to sync OPP: %d\n", err);
+		return err;
+	}
+
 	err = clk_prepare_enable(fuse->clk);
 	if (err < 0) {
 		dev_err(dev, "failed to enable FUSE clock: %d\n", err);
-- 
2.32.0