linux-kernel - [PATCH 04/11] clk: tegra30: Mark certain clks as critical

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Date:	Wed, 25 May 2016 18:24:24 -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 04/11] clk: tegra30: Mark certain clks as critical

Mark the required clks as critical so the core will enable them during
registration and therefore they will stay on.

Signed-off-by: Rhyland Klein <rklein@...dia.com>
---
 drivers/clk/tegra/clk-tegra30.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
index 9396f4930da7..fc91460ab892 100644
--- a/drivers/clk/tegra/clk-tegra30.c
+++ b/drivers/clk/tegra/clk-tegra30.c
@@ -948,8 +948,8 @@ static void __init tegra30_pll_init(void)
 
 	/* PLLM */
 	clk = tegra_clk_register_pll("pll_m", "pll_ref", clk_base, pmc_base,
-			    CLK_IGNORE_UNUSED | CLK_SET_RATE_GATE,
-			    &pll_m_params, NULL);
+			    CLK_IGNORE_UNUSED | CLK_SET_RATE_GATE |
+			    CLK_IS_CRITICAL, &pll_m_params, NULL);
 	clks[TEGRA30_CLK_PLL_M] = clk;
 
 	/* PLLM_OUT1 */
@@ -1104,7 +1104,8 @@ static void __init tegra30_super_clk_init(void)
 
 	/* twd */
 	clk = clk_register_fixed_factor(NULL, "twd", "cclk_g",
-					CLK_SET_RATE_PARENT, 1, 2);
+					CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
+					1, 2);
 	clks[TEGRA30_CLK_TWD] = clk;
 
 	tegra_super_clk_gen4_init(clk_base, pmc_base, tegra30_clks, NULL);
@@ -1164,11 +1165,12 @@ static void __init tegra30_periph_clk_init(void)
 	/* emc */
 	clk = clk_register_mux(NULL, "emc_mux", mux_pllmcp_clkm,
 			       ARRAY_SIZE(mux_pllmcp_clkm),
-			       CLK_SET_RATE_NO_REPARENT,
+			       CLK_SET_RATE_NO_REPARENT | CLK_IS_CRITICAL,
 			       clk_base + CLK_SOURCE_EMC,
 			       30, 2, 0, &emc_lock);
-	clk = tegra_clk_register_periph_gate("emc", "emc_mux", 0, clk_base, 0,
-				    57, periph_clk_enb_refcnt);
+	clk = tegra_clk_register_periph_gate("emc", "emc_mux", 0, clk_base,
+				    CLK_IS_CRITICAL, 57,
+				    periph_clk_enb_refcnt);
 	clks[TEGRA30_CLK_EMC] = clk;
 
 	clk = tegra_clk_register_mc("mc", "emc_mux", clk_base + CLK_SOURCE_EMC,
-- 
1.9.1