linux-kernel - [PATCH 5.6 055/166] memory: tegra: Correct debugfs clk rate-range on Tegra20

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Message-Id: <20200422095054.847251371@linuxfoundation.org>
Date:   Wed, 22 Apr 2020 11:56:22 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <treding@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.6 055/166] memory: tegra: Correct debugfs clk rate-range on Tegra20

From: Dmitry Osipenko <digetx@...il.com>

[ Upstream commit 2243af41115d0e36e6414df6dd2a0386e022d9f8 ]

Correctly set clk rate-range if number of available timings is zero.
This fixes noisy "invalid range [4294967295, 0]" error messages during
boot.

Fixes: 8209eefa3d37 ("memory: tegra: Implement EMC debugfs interface on Tegra20")
Signed-off-by: Dmitry Osipenko <digetx@...il.com>
Signed-off-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/memory/tegra/tegra20-emc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index 8ae474d9bfb90..b16715e9515d0 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -628,6 +628,11 @@ static void tegra_emc_debugfs_init(struct tegra_emc *emc)
 			emc->debugfs.max_rate = emc->timings[i].rate;
 	}
 
+	if (!emc->num_timings) {
+		emc->debugfs.min_rate = clk_get_rate(emc->clk);
+		emc->debugfs.max_rate = emc->debugfs.min_rate;
+	}
+
 	err = clk_set_rate_range(emc->clk, emc->debugfs.min_rate,
 				 emc->debugfs.max_rate);
 	if (err < 0) {
-- 
2.20.1