linux-kernel - [PATCH v1 22/30] memory: tegra20-emc: Support Tegra SoC device state syncing

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Message-Id: <20201104234427.26477-23-digetx@gmail.com>
Date:   Thu,  5 Nov 2020 02:44:19 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Peter Chen <Peter.Chen@....com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>
Cc:     linux-samsung-soc@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-usb@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v1 22/30] memory: tegra20-emc: Support Tegra SoC device state syncing

Sync driver state using the Tegra SoC device state syncing API, telling
to regulators voltage coupler that EMC state is ready for DVFS. This is
required for enabling system-wide DVFS on Tegra20.

Tested-by: Nicolas Chauvet <kwizart@...il.com>
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/memory/tegra/tegra20-emc.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index 9946b957bb01..b1b0a2439689 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -1129,6 +1129,12 @@ static int tegra_emc_probe(struct platform_device *pdev)
 	return err;
 }
 
+static void tegra_emc_sync_state(struct device *dev)
+{
+	tegra_soc_device_sync_state(dev);
+	icc_sync_state(dev);
+}
+
 static const struct of_device_id tegra_emc_of_match[] = {
 	{ .compatible = "nvidia,tegra20-emc", },
 	{},
@@ -1141,7 +1147,7 @@ static struct platform_driver tegra_emc_driver = {
 		.name = "tegra20-emc",
 		.of_match_table = tegra_emc_of_match,
 		.suppress_bind_attrs = true,
-		.sync_state = icc_sync_state,
+		.sync_state = tegra_emc_sync_state,
 	},
 };
 module_platform_driver(tegra_emc_driver);
-- 
2.27.0