linux-kernel - [PATCH 11/11] clk: tegra: WARN if clk in the init

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Message-ID: <1464215071-28696-12-git-send-email-rklein@nvidia.com>
Date:	Wed, 25 May 2016 18:24:31 -0400
From:	Rhyland Klein <rklein@...dia.com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>
CC:	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Alexandre Courbot <gnurou@...il.com>,
	<linux-clk@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Rhyland Klein <rklein@...dia.com>
Subject: [PATCH 11/11] clk: tegra: WARN if clk in the init_table has enable

Enabling clocks through the init_table mechanism is deprecated. Clocks
that need to be enabled early and stay on should be marked as CRITICAL.

Signed-off-by: Rhyland Klein <rklein@...dia.com>
---
 drivers/clk/tegra/clk.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/clk/tegra/clk.c b/drivers/clk/tegra/clk.c
index b2cdd9a235f4..898fe922c742 100644
--- a/drivers/clk/tegra/clk.c
+++ b/drivers/clk/tegra/clk.c
@@ -262,6 +262,11 @@ void __init tegra_init_from_table(struct tegra_clk_init_table *tbl,
 				WARN_ON(1);
 			}
 
+		/* Using the init_table to enable clks at boot is
+		 * deprecated. Clks that need to be enabled through early
+		 * boot, they should be marked as CLK_IS_CRITICAL
+		 */
+		WARN_ON_ONCE(tbl->state);
 		if (tbl->state)
 			if (clk_prepare_enable(clk)) {
 				pr_err("%s: Failed to enable %s\n", __func__,
-- 
1.9.1