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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, Lori Hikichi <lori.hikichi@broadcom.com>,
        Stephen Boyd <sboyd@codeaurora.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.14 018/210] clk: iproc: Minor tidy up of iproc pll data structures
Date:   Mon, 24 Oct 2022 13:28:55 +0200
Message-Id: <20221024112957.542806389@linuxfoundation.org>
In-Reply-To: <20221024112956.797777597@linuxfoundation.org>
References: <20221024112956.797777597@linuxfoundation.org>
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From: Lori Hikichi <lhikichi@broadcom.com>

[ Upstream commit b33db49783763e1b2a63b12fbe0e91fb7147a987 ]

There were a few fields in the iproc pll data structures that were
holding information that was not true state information.
Using stack variables is sufficient and simplifies the structure.
There are not any functional changes in this commit.

Signed-off-by: Lori Hikichi <lori.hikichi@broadcom.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Stable-dep-of: 1b24a132eba7 ("clk: iproc: Do not rely on node name for correct PLL setup")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/clk/bcm/clk-iproc-pll.c | 83 ++++++++++++++-------------------
 1 file changed, 36 insertions(+), 47 deletions(-)

diff --git a/drivers/clk/bcm/clk-iproc-pll.c b/drivers/clk/bcm/clk-iproc-pll.c
index 375d8dd80d45..0e858dbf2505 100644
--- a/drivers/clk/bcm/clk-iproc-pll.c
+++ b/drivers/clk/bcm/clk-iproc-pll.c
@@ -69,16 +69,6 @@ enum vco_freq_range {
 	VCO_MAX       = 4000000000U,
 };
 
-struct iproc_pll;
-
-struct iproc_clk {
-	struct clk_hw hw;
-	const char *name;
-	struct iproc_pll *pll;
-	unsigned long rate;
-	const struct iproc_clk_ctrl *ctrl;
-};
-
 struct iproc_pll {
 	void __iomem *status_base;
 	void __iomem *control_base;
@@ -88,9 +78,12 @@ struct iproc_pll {
 	const struct iproc_pll_ctrl *ctrl;
 	const struct iproc_pll_vco_param *vco_param;
 	unsigned int num_vco_entries;
+};
 
-	struct clk_hw_onecell_data *clk_data;
-	struct iproc_clk *clks;
+struct iproc_clk {
+	struct clk_hw hw;
+	struct iproc_pll *pll;
+	const struct iproc_clk_ctrl *ctrl;
 };
 
 #define to_iproc_clk(hw) container_of(hw, struct iproc_clk, hw)
@@ -263,6 +256,7 @@ static int pll_set_rate(struct iproc_clk *clk, unsigned int rate_index,
 	u32 val;
 	enum kp_band kp_index;
 	unsigned long ref_freq;
+	const char *clk_name = clk_hw_get_name(&clk->hw);
 
 	/*
 	 * reference frequency = parent frequency / PDIV
@@ -285,19 +279,19 @@ static int pll_set_rate(struct iproc_clk *clk, unsigned int rate_index,
 		kp_index = KP_BAND_HIGH_HIGH;
 	} else {
 		pr_err("%s: pll: %s has invalid rate: %lu\n", __func__,
-				clk->name, rate);
+				clk_name, rate);
 		return -EINVAL;
 	}
 
 	kp = get_kp(ref_freq, kp_index);
 	if (kp < 0) {
-		pr_err("%s: pll: %s has invalid kp\n", __func__, clk->name);
+		pr_err("%s: pll: %s has invalid kp\n", __func__, clk_name);
 		return kp;
 	}
 
 	ret = __pll_enable(pll);
 	if (ret) {
-		pr_err("%s: pll: %s fails to enable\n", __func__, clk->name);
+		pr_err("%s: pll: %s fails to enable\n", __func__, clk_name);
 		return ret;
 	}
 
@@ -354,7 +348,7 @@ static int pll_set_rate(struct iproc_clk *clk, unsigned int rate_index,
 
 	ret = pll_wait_for_lock(pll);
 	if (ret < 0) {
-		pr_err("%s: pll: %s failed to lock\n", __func__, clk->name);
+		pr_err("%s: pll: %s failed to lock\n", __func__, clk_name);
 		return ret;
 	}
 
@@ -390,16 +384,15 @@ static unsigned long iproc_pll_recalc_rate(struct clk_hw *hw,
 	u32 val;
 	u64 ndiv, ndiv_int, ndiv_frac;
 	unsigned int pdiv;
+	unsigned long rate;
 
 	if (parent_rate == 0)
 		return 0;
 
 	/* PLL needs to be locked */
 	val = readl(pll->status_base + ctrl->status.offset);
-	if ((val & (1 << ctrl->status.shift)) == 0) {
-		clk->rate = 0;
+	if ((val & (1 << ctrl->status.shift)) == 0)
 		return 0;
-	}
 
 	/*
 	 * PLL output frequency =
@@ -421,14 +414,14 @@ static unsigned long iproc_pll_recalc_rate(struct clk_hw *hw,
 	val = readl(pll->control_base + ctrl->pdiv.offset);
 	pdiv = (val >> ctrl->pdiv.shift) & bit_mask(ctrl->pdiv.width);
 
-	clk->rate = (ndiv * parent_rate) >> 20;
+	rate = (ndiv * parent_rate) >> 20;
 
 	if (pdiv == 0)
-		clk->rate *= 2;
+		rate *= 2;
 	else
-		clk->rate /= pdiv;
+		rate /= pdiv;
 
-	return clk->rate;
+	return rate;
 }
 
 static long iproc_pll_round_rate(struct clk_hw *hw, unsigned long rate,
@@ -518,6 +511,7 @@ static unsigned long iproc_clk_recalc_rate(struct clk_hw *hw,
 	struct iproc_pll *pll = clk->pll;
 	u32 val;
 	unsigned int mdiv;
+	unsigned long rate;
 
 	if (parent_rate == 0)
 		return 0;
@@ -528,11 +522,11 @@ static unsigned long iproc_clk_recalc_rate(struct clk_hw *hw,
 		mdiv = 256;
 
 	if (ctrl->flags & IPROC_CLK_MCLK_DIV_BY_2)
-		clk->rate = parent_rate / (mdiv * 2);
+		rate = parent_rate / (mdiv * 2);
 	else
-		clk->rate = parent_rate / mdiv;
+		rate = parent_rate / mdiv;
 
-	return clk->rate;
+	return rate;
 }
 
 static long iproc_clk_round_rate(struct clk_hw *hw, unsigned long rate,
@@ -583,10 +577,6 @@ static int iproc_clk_set_rate(struct clk_hw *hw, unsigned long rate,
 		val |= div << ctrl->mdiv.shift;
 	}
 	iproc_pll_write(pll, pll->control_base, ctrl->mdiv.offset, val);
-	if (ctrl->flags & IPROC_CLK_MCLK_DIV_BY_2)
-		clk->rate = parent_rate / (div * 2);
-	else
-		clk->rate = parent_rate / div;
 
 	return 0;
 }
@@ -629,6 +619,8 @@ void iproc_pll_clk_setup(struct device_node *node,
 	struct iproc_clk *iclk;
 	struct clk_init_data init;
 	const char *parent_name;
+	struct iproc_clk *iclk_array;
+	struct clk_hw_onecell_data *clk_data;
 
 	if (WARN_ON(!pll_ctrl) || WARN_ON(!clk_ctrl))
 		return;
@@ -637,14 +629,14 @@ void iproc_pll_clk_setup(struct device_node *node,
 	if (WARN_ON(!pll))
 		return;
 
-	pll->clk_data = kzalloc(sizeof(*pll->clk_data->hws) * num_clks +
-				sizeof(*pll->clk_data), GFP_KERNEL);
-	if (WARN_ON(!pll->clk_data))
+	clk_data = kzalloc(sizeof(*clk_data->hws) * num_clks +
+				sizeof(*clk_data), GFP_KERNEL);
+	if (WARN_ON(!clk_data))
 		goto err_clk_data;
-	pll->clk_data->num = num_clks;
+	clk_data->num = num_clks;
 
-	pll->clks = kcalloc(num_clks, sizeof(*pll->clks), GFP_KERNEL);
-	if (WARN_ON(!pll->clks))
+	iclk_array = kcalloc(num_clks, sizeof(struct iproc_clk), GFP_KERNEL);
+	if (WARN_ON(!iclk_array))
 		goto err_clks;
 
 	pll->control_base = of_iomap(node, 0);
@@ -674,9 +666,8 @@ void iproc_pll_clk_setup(struct device_node *node,
 	/* initialize and register the PLL itself */
 	pll->ctrl = pll_ctrl;
 
-	iclk = &pll->clks[0];
+	iclk = &iclk_array[0];
 	iclk->pll = pll;
-	iclk->name = node->name;
 
 	init.name = node->name;
 	init.ops = &iproc_pll_ops;
@@ -697,7 +688,7 @@ void iproc_pll_clk_setup(struct device_node *node,
 	if (WARN_ON(ret))
 		goto err_pll_register;
 
-	pll->clk_data->hws[0] = &iclk->hw;
+	clk_data->hws[0] = &iclk->hw;
 
 	/* now initialize and register all leaf clocks */
 	for (i = 1; i < num_clks; i++) {
@@ -711,8 +702,7 @@ void iproc_pll_clk_setup(struct device_node *node,
 		if (WARN_ON(ret))
 			goto err_clk_register;
 
-		iclk = &pll->clks[i];
-		iclk->name = clk_name;
+		iclk = &iclk_array[i];
 		iclk->pll = pll;
 		iclk->ctrl = &clk_ctrl[i];
 
@@ -727,11 +717,10 @@ void iproc_pll_clk_setup(struct device_node *node,
 		if (WARN_ON(ret))
 			goto err_clk_register;
 
-		pll->clk_data->hws[i] = &iclk->hw;
+		clk_data->hws[i] = &iclk->hw;
 	}
 
-	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get,
-				     pll->clk_data);
+	ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 	if (WARN_ON(ret))
 		goto err_clk_register;
 
@@ -739,7 +728,7 @@ void iproc_pll_clk_setup(struct device_node *node,
 
 err_clk_register:
 	while (--i >= 0)
-		clk_hw_unregister(pll->clk_data->hws[i]);
+		clk_hw_unregister(clk_data->hws[i]);
 
 err_pll_register:
 	if (pll->status_base != pll->control_base)
@@ -756,10 +745,10 @@ void iproc_pll_clk_setup(struct device_node *node,
 	iounmap(pll->control_base);
 
 err_pll_iomap:
-	kfree(pll->clks);
+	kfree(iclk_array);
 
 err_clks:
-	kfree(pll->clk_data);
+	kfree(clk_data);
 
 err_clk_data:
 	kfree(pll);
-- 
2.35.1