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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Jerome Brunet <jbrunet@baylibre.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 029/118] clk: meson: clk-pll: drop CLK_GET_RATE_NOCACHE where unnecessary
Date:   Mon, 26 Nov 2018 11:50:23 +0100
Message-Id: <20181126105100.989313708@linuxfoundation.org>
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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

[ Upstream commit 2303a9ca693e585a558497ad737728fec97e2b8a ]

CLK_GET_RATE_NOCACHE should only be necessary when the registers
controlling the rate of clock may change outside of CCF. On Amlogic,
it should only be the case for the hdmi pll which is directly controlled
by the display driver (WIP to fix this).

The other plls should not require this flag.

Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/clk/meson/axg.c     |  1 -
 drivers/clk/meson/gxbb.c    | 12 ++++++++----
 drivers/clk/meson/meson8b.c |  3 ---
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/meson/axg.c b/drivers/clk/meson/axg.c
index baabcf7c0a24..02229d051d77 100644
--- a/drivers/clk/meson/axg.c
+++ b/drivers/clk/meson/axg.c
@@ -96,7 +96,6 @@ static struct clk_regmap axg_sys_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
diff --git a/drivers/clk/meson/gxbb.c b/drivers/clk/meson/gxbb.c
index 6435d86118f1..6628ffa31383 100644
--- a/drivers/clk/meson/gxbb.c
+++ b/drivers/clk/meson/gxbb.c
@@ -213,7 +213,6 @@ static struct clk_regmap gxbb_fixed_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
@@ -276,6 +275,10 @@ static struct clk_regmap gxbb_hdmi_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "hdmi_pll_pre_mult" },
 		.num_parents = 1,
+		/*
+		 * Display directly handle hdmi pll registers ATM, we need
+		 * NOCACHE to keep our view of the clock as accurate as possible
+		 */
 		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
@@ -334,6 +337,10 @@ static struct clk_regmap gxl_hdmi_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
+		/*
+		 * Display directly handle hdmi pll registers ATM, we need
+		 * NOCACHE to keep our view of the clock as accurate as possible
+		 */
 		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
@@ -371,7 +378,6 @@ static struct clk_regmap gxbb_sys_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
@@ -418,7 +424,6 @@ static struct clk_regmap gxbb_gp0_pll = {
 		.ops = &meson_clk_pll_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
@@ -472,7 +477,6 @@ static struct clk_regmap gxl_gp0_pll = {
 		.ops = &meson_clk_pll_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 7447d96a265f..74697e145dde 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -132,7 +132,6 @@ static struct clk_regmap meson8b_fixed_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
@@ -169,7 +168,6 @@ static struct clk_regmap meson8b_vid_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
@@ -207,7 +205,6 @@ static struct clk_regmap meson8b_sys_pll = {
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
-		.flags = CLK_GET_RATE_NOCACHE,
 	},
 };
 
-- 
2.17.1