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Groups > linux.kernel > #1408310

[PATCH v2 04/11] clk: tegra30: Mark certain clks as critical

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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@nvidia.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

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Thread

[PATCH v2 00/11] Switch to using CRITICAL clks for Tegra Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:40 +0200
  [PATCH v2 10/11] clk: Show CRITICAL clks in clk_summary output Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:40 +0200
  [PATCH v2 11/11] clk: tegra: WARN if clk in the init_table has enable Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:40 +0200
  [PATCH v2 07/11] clk: tegra124: clean up init_table Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 09/11] clk: tegra210: clean up init_table Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 05/11] clk: tegra30: clean up init_table Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 08/11] clk: tegra210: Mark required clks as CRITICAL Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 03/11] clk: tegra20: clean up init_table Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 04/11] clk: tegra30: Mark certain clks as critical Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 01/11] clk: tegra: Switch to using critical clks Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200
  [PATCH v2 06/11] clk: tegra114: clean up init_table Rhyland Klein <rklein@nvidia.com> - 2016-05-27 22:50 +0200

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