linux-kernel - [PATCH v8 05/11] clk: meson: pll: export meson_clk_pll_wait

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Message-ID: <20221201225703.6507-6-ddrokosov@sberdevices.ru>
Date:   Fri, 2 Dec 2022 01:56:57 +0300
From:   Dmitry Rokosov <ddrokosov@...rdevices.ru>
To:     <neil.armstrong@...aro.org>, <jbrunet@...libre.com>,
        <mturquette@...libre.com>, <sboyd@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <khilman@...libre.com>, <martin.blumenstingl@...glemail.com>
CC:     <jian.hu@...ogic.com>, <kernel@...rdevices.ru>,
        <rockosov@...il.com>, <linux-amlogic@...ts.infradead.org>,
        <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Dmitry Rokosov <ddrokosov@...rdevices.ru>
Subject: [PATCH v8 05/11] clk: meson: pll: export meson_clk_pll_wait_lock symbol

Modern meson PLL IPs are a little bit different from early known PLLs.
The main difference is located in the init/enable/disable sequences; the
rate logic is the same. So drivers for the new PLLs can be inherited
from the clk-pll driver and redefine init/enable/disable routines only.
For that purpose we need to have meson_clk_pll_wait_lock() in the export
symbols list, because each lock operation should be ended with wait
cycles.

Signed-off-by: Dmitry Rokosov <ddrokosov@...rdevices.ru>
---
 drivers/clk/meson/clk-pll.c | 3 ++-
 drivers/clk/meson/clk-pll.h | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/meson/clk-pll.c b/drivers/clk/meson/clk-pll.c
index 9e55617bc3b4..81c810d57a48 100644
--- a/drivers/clk/meson/clk-pll.c
+++ b/drivers/clk/meson/clk-pll.c
@@ -273,7 +273,7 @@ static int meson_clk_pll_determine_rate(struct clk_hw *hw,
 	return 0;
 }
 
-static int meson_clk_pll_wait_lock(struct clk_hw *hw)
+int meson_clk_pll_wait_lock(struct clk_hw *hw)
 {
 	struct clk_regmap *clk = to_clk_regmap(hw);
 	struct meson_clk_pll_data *pll = meson_clk_pll_data(clk);
@@ -289,6 +289,7 @@ static int meson_clk_pll_wait_lock(struct clk_hw *hw)
 
 	return -ETIMEDOUT;
 }
+EXPORT_SYMBOL_GPL(meson_clk_pll_wait_lock);
 
 static int meson_clk_pll_init(struct clk_hw *hw)
 {
diff --git a/drivers/clk/meson/clk-pll.h b/drivers/clk/meson/clk-pll.h
index 367efd0f6410..85fec18c4b8a 100644
--- a/drivers/clk/meson/clk-pll.h
+++ b/drivers/clk/meson/clk-pll.h
@@ -47,4 +47,6 @@ extern const struct clk_ops meson_clk_pll_ro_ops;
 extern const struct clk_ops meson_clk_pll_ops;
 extern const struct clk_ops meson_clk_pcie_pll_ops;
 
+int meson_clk_pll_wait_lock(struct clk_hw *hw);
+
 #endif /* __MESON_CLK_PLL_H */
-- 
2.36.0