linux-kernel - [PATCH v3 12/13] clk: microchip: mpfs: convert periph_clk to clk

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Date:   Fri, 19 Aug 2022 10:53:20 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Daire McNamara <daire.mcnamara@...rochip.com>
CC:     Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>
Subject: [PATCH v3 12/13] clk: microchip: mpfs: convert periph_clk to clk_gate

With the reset code moved to the recently added reset controller, there
is no need for custom ops any longer. Remove the custom ops and the
custom struct by converting to a clk_gate.

Reviewed-by: Daire McNamara <daire.mcnamara@...rochip.com>
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 drivers/clk/microchip/clk-mpfs.c | 72 +++-----------------------------
 1 file changed, 6 insertions(+), 66 deletions(-)

diff --git a/drivers/clk/microchip/clk-mpfs.c b/drivers/clk/microchip/clk-mpfs.c
index 8af532f03d24..35a67d2b7845 100644
--- a/drivers/clk/microchip/clk-mpfs.c
+++ b/drivers/clk/microchip/clk-mpfs.c
@@ -58,19 +58,11 @@ struct mpfs_cfg_hw_clock {
 	u32 reg_offset;
 };
 
-struct mpfs_periph_clock {
-	void __iomem *reg;
-	u8 shift;
-};
-
 struct mpfs_periph_hw_clock {
-	struct mpfs_periph_clock periph;
-	struct clk_hw hw;
+	struct clk_gate periph;
 	unsigned int id;
 };
 
-#define to_mpfs_periph_clk(_hw) container_of(_hw, struct mpfs_periph_hw_clock, hw)
-
 /*
  * mpfs_clk_lock prevents anything else from writing to the
  * mpfs clk block while a software locked register is being written.
@@ -273,64 +265,12 @@ static int mpfs_clk_register_cfgs(struct device *dev, struct mpfs_cfg_hw_clock *
  * peripheral clocks - devices connected to axi or ahb buses.
  */
 
-static int mpfs_periph_clk_enable(struct clk_hw *hw)
-{
-	struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw);
-	struct mpfs_periph_clock *periph = &periph_hw->periph;
-	u32 reg, val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&mpfs_clk_lock, flags);
-
-	reg = readl_relaxed(periph->reg);
-	val = reg | (1u << periph->shift);
-	writel_relaxed(val, periph->reg);
-
-	spin_unlock_irqrestore(&mpfs_clk_lock, flags);
-
-	return 0;
-}
-
-static void mpfs_periph_clk_disable(struct clk_hw *hw)
-{
-	struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw);
-	struct mpfs_periph_clock *periph = &periph_hw->periph;
-	u32 reg, val;
-	unsigned long flags;
-
-	spin_lock_irqsave(&mpfs_clk_lock, flags);
-
-	reg = readl_relaxed(periph->reg);
-	val = reg & ~(1u << periph->shift);
-	writel_relaxed(val, periph->reg);
-
-	spin_unlock_irqrestore(&mpfs_clk_lock, flags);
-}
-
-static int mpfs_periph_clk_is_enabled(struct clk_hw *hw)
-{
-	struct mpfs_periph_hw_clock *periph_hw = to_mpfs_periph_clk(hw);
-	struct mpfs_periph_clock *periph = &periph_hw->periph;
-	u32 reg;
-
-	reg = readl_relaxed(periph->reg);
-	if (reg & (1u << periph->shift))
-		return 1;
-
-	return 0;
-}
-
-static const struct clk_ops mpfs_periph_clk_ops = {
-	.enable = mpfs_periph_clk_enable,
-	.disable = mpfs_periph_clk_disable,
-	.is_enabled = mpfs_periph_clk_is_enabled,
-};
-
 #define CLK_PERIPH(_id, _name, _parent, _shift, _flags) {			\
 	.id = _id,								\
-	.periph.shift = _shift,							\
-	.hw.init = CLK_HW_INIT_HW(_name, _parent, &mpfs_periph_clk_ops,		\
+	.periph.bit_idx = _shift,						\
+	.periph.hw.init = CLK_HW_INIT_HW(_name, _parent, &clk_gate_ops,		\
 				  _flags),					\
+	.periph.lock = &mpfs_clk_lock,						\
 }
 
 #define PARENT_CLK(PARENT) (&mpfs_cfg_clks[CLK_##PARENT].cfg.hw)
@@ -390,13 +330,13 @@ static int mpfs_clk_register_periphs(struct device *dev, struct mpfs_periph_hw_c
 		struct mpfs_periph_hw_clock *periph_hw = &periph_hws[i];
 
 		periph_hw->periph.reg = data->base + REG_SUBBLK_CLOCK_CR;
-		ret = devm_clk_hw_register(dev, &periph_hw->hw);
+		ret = devm_clk_hw_register(dev, &periph_hw->periph.hw);
 		if (ret)
 			return dev_err_probe(dev, ret, "failed to register clock id: %d\n",
 					     periph_hw->id);
 
 		id = periph_hws[i].id;
-		data->hw_data.hws[id] = &periph_hw->hw;
+		data->hw_data.hws[id] = &periph_hw->periph.hw;
 	}
 
 	return 0;
-- 
2.36.1