linux-kernel - [PATCH] clk: zynq: Use clk_readl/clk

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Message-Id: <fcff6030d4dd07c43482a551cf1bc79545fbb55d.1392886522.git.michal.simek@xilinx.com>
Date:	Thu, 20 Feb 2014 09:55:46 +0100
From:	Michal Simek <michal.simek@...inx.com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Michal Simek <monstr@...str.eu>,
	Josh Cartwright <josh.cartwright@...com>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Rob Herring <robherring2@...il.com>,
	Peter Crosthwaite <peter.crosthwaite@...inx.com>,
	Mike Turquette <mturquette@...aro.org>,
	Soren Brinkmann <soren.brinkmann@...inx.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Stephen Warren <swarren@...dia.com>,
	James Hogan <james.hogan@...tec.com>,
	Felipe Pena <felipensp@...il.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] clk: zynq: Use clk_readl/clk_writel helper function

Do not use readl/writel directly because the whole
clk subsystem is using clk_readl/clk_writel functions.

Signed-off-by: Michal Simek <michal.simek@...inx.com>
Acked-by: Soren Brinkmann <soren.brinkmann@...inx.com>
---

 drivers/clk/zynq/clkc.c |  4 ++--
 drivers/clk/zynq/pll.c  | 18 +++++++++---------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c
index 09dd017..e726c1b 100644
--- a/drivers/clk/zynq/clkc.c
+++ b/drivers/clk/zynq/clkc.c
@@ -148,7 +148,7 @@ static void __init zynq_clk_register_fclk(enum zynq_clk fclk,
 	clks[fclk] = clk_register_gate(NULL, clk_name,
 			div1_name, CLK_SET_RATE_PARENT, fclk_gate_reg,
 			0, CLK_GATE_SET_TO_DISABLE, fclk_gate_lock);
-	enable_reg = readl(fclk_gate_reg) & 1;
+	enable_reg = clk_readl(fclk_gate_reg) & 1;
 	if (enable && !enable_reg) {
 		if (clk_prepare_enable(clks[fclk]))
 			pr_warn("%s: FCLK%u enable failed\n", __func__,
@@ -277,7 +277,7 @@ static void __init zynq_clk_setup(struct device_node *np)
 			SLCR_IOPLL_CTRL, 4, 1, 0, &iopll_lock);

 	/* CPU clocks */
-	tmp = readl(SLCR_621_TRUE) & 1;
+	tmp = clk_readl(SLCR_621_TRUE) & 1;
 	clk = clk_register_mux(NULL, "cpu_mux", cpu_parents, 4,
 			CLK_SET_RATE_NO_REPARENT, SLCR_ARM_CLK_CTRL, 4, 2, 0,
 			&armclk_lock);
diff --git a/drivers/clk/zynq/pll.c b/drivers/clk/zynq/pll.c
index 3226f54..cec9759 100644
--- a/drivers/clk/zynq/pll.c
+++ b/drivers/clk/zynq/pll.c
@@ -90,7 +90,7 @@ static unsigned long zynq_pll_recalc_rate(struct clk_hw *hw,
 	 * makes probably sense to redundantly save fbdiv in the struct
 	 * zynq_pll to save the IO access.
 	 */
-	fbdiv = (readl(clk->pll_ctrl) & PLLCTRL_FBDIV_MASK) >>
+	fbdiv = (clk_readl(clk->pll_ctrl) & PLLCTRL_FBDIV_MASK) >>
 			PLLCTRL_FBDIV_SHIFT;

 	return parent_rate * fbdiv;
@@ -112,7 +112,7 @@ static int zynq_pll_is_enabled(struct clk_hw *hw)

 	spin_lock_irqsave(clk->lock, flags);

-	reg = readl(clk->pll_ctrl);
+	reg = clk_readl(clk->pll_ctrl);

 	spin_unlock_irqrestore(clk->lock, flags);

@@ -138,10 +138,10 @@ static int zynq_pll_enable(struct clk_hw *hw)
 	/* Power up PLL and wait for lock */
 	spin_lock_irqsave(clk->lock, flags);

-	reg = readl(clk->pll_ctrl);
+	reg = clk_readl(clk->pll_ctrl);
 	reg &= ~(PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK);
-	writel(reg, clk->pll_ctrl);
-	while (!(readl(clk->pll_status) & (1 << clk->lockbit)))
+	clk_writel(reg, clk->pll_ctrl);
+	while (!(clk_readl(clk->pll_status) & (1 << clk->lockbit)))
 		;

 	spin_unlock_irqrestore(clk->lock, flags);
@@ -168,9 +168,9 @@ static void zynq_pll_disable(struct clk_hw *hw)
 	/* shut down PLL */
 	spin_lock_irqsave(clk->lock, flags);

-	reg = readl(clk->pll_ctrl);
+	reg = clk_readl(clk->pll_ctrl);
 	reg |= PLLCTRL_RESET_MASK | PLLCTRL_PWRDWN_MASK;
-	writel(reg, clk->pll_ctrl);
+	clk_writel(reg, clk->pll_ctrl);

 	spin_unlock_irqrestore(clk->lock, flags);
 }
@@ -225,9 +225,9 @@ struct clk *clk_register_zynq_pll(const char *name, const char *parent,

 	spin_lock_irqsave(pll->lock, flags);

-	reg = readl(pll->pll_ctrl);
+	reg = clk_readl(pll->pll_ctrl);
 	reg &= ~PLLCTRL_BPQUAL_MASK;
-	writel(reg, pll->pll_ctrl);
+	clk_writel(reg, pll->pll_ctrl);

 	spin_unlock_irqrestore(pll->lock, flags);

--
1.8.2.3


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