clk: samsung: pll: Add support for PLL6552 and PLL6553

This patch adds support for PLL6552 and PLL6553 PLLs present on Samsung
S3C64xx SoCs.
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

drivers/clk/samsung/clk-pll.c

@@ -336,6 +336,166 @@ struct clk * __init samsung_clk_register_pll46xx(const char *name,
 	return clk;
 }
 
+/*
+ * PLL6552 Clock Type
+ */
+
+#define PLL6552_LOCK_REG	0x00
+#define PLL6552_CON_REG		0x0c
+
+#define PLL6552_MDIV_MASK	0x3ff
+#define PLL6552_PDIV_MASK	0x3f
+#define PLL6552_SDIV_MASK	0x7
+#define PLL6552_MDIV_SHIFT	16
+#define PLL6552_PDIV_SHIFT	8
+#define PLL6552_SDIV_SHIFT	0
+
+struct samsung_clk_pll6552 {
+	struct clk_hw hw;
+	void __iomem *reg_base;
+};
+
+#define to_clk_pll6552(_hw) container_of(_hw, struct samsung_clk_pll6552, hw)
+
+static unsigned long samsung_pll6552_recalc_rate(struct clk_hw *hw,
+						unsigned long parent_rate)
+{
+	struct samsung_clk_pll6552 *pll = to_clk_pll6552(hw);
+	u32 mdiv, pdiv, sdiv, pll_con;
+	u64 fvco = parent_rate;
+
+	pll_con = __raw_readl(pll->reg_base + PLL6552_CON_REG);
+	mdiv = (pll_con >> PLL6552_MDIV_SHIFT) & PLL6552_MDIV_MASK;
+	pdiv = (pll_con >> PLL6552_PDIV_SHIFT) & PLL6552_PDIV_MASK;
+	sdiv = (pll_con >> PLL6552_SDIV_SHIFT) & PLL6552_SDIV_MASK;
+
+	fvco *= mdiv;
+	do_div(fvco, (pdiv << sdiv));
+
+	return (unsigned long)fvco;
+}
+
+static const struct clk_ops samsung_pll6552_clk_ops = {
+	.recalc_rate = samsung_pll6552_recalc_rate,
+};
+
+struct clk * __init samsung_clk_register_pll6552(const char *name,
+					const char *pname, void __iomem *base)
+{
+	struct samsung_clk_pll6552 *pll;
+	struct clk *clk;
+	struct clk_init_data init;
+
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll) {
+		pr_err("%s: could not allocate pll clk %s\n", __func__, name);
+		return NULL;
+	}
+
+	init.name = name;
+	init.ops = &samsung_pll6552_clk_ops;
+	init.parent_names = &pname;
+	init.num_parents = 1;
+
+	pll->hw.init = &init;
+	pll->reg_base = base;
+
+	clk = clk_register(NULL, &pll->hw);
+	if (IS_ERR(clk)) {
+		pr_err("%s: failed to register pll clock %s\n", __func__,
+				name);
+		kfree(pll);
+	}
+
+	if (clk_register_clkdev(clk, name, NULL))
+		pr_err("%s: failed to register lookup for %s", __func__, name);
+
+	return clk;
+}
+
+/*
+ * PLL6553 Clock Type
+ */
+
+#define PLL6553_LOCK_REG	0x00
+#define PLL6553_CON0_REG	0x0c
+#define PLL6553_CON1_REG	0x10
+
+#define PLL6553_MDIV_MASK	0xff
+#define PLL6553_PDIV_MASK	0x3f
+#define PLL6553_SDIV_MASK	0x7
+#define PLL6553_KDIV_MASK	0xffff
+#define PLL6553_MDIV_SHIFT	16
+#define PLL6553_PDIV_SHIFT	8
+#define PLL6553_SDIV_SHIFT	0
+#define PLL6553_KDIV_SHIFT	0
+
+struct samsung_clk_pll6553 {
+	struct clk_hw hw;
+	void __iomem *reg_base;
+};
+
+#define to_clk_pll6553(_hw) container_of(_hw, struct samsung_clk_pll6553, hw)
+
+static unsigned long samsung_pll6553_recalc_rate(struct clk_hw *hw,
+						unsigned long parent_rate)
+{
+	struct samsung_clk_pll6553 *pll = to_clk_pll6553(hw);
+	u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1;
+	u64 fvco = parent_rate;
+
+	pll_con0 = __raw_readl(pll->reg_base + PLL6553_CON0_REG);
+	pll_con1 = __raw_readl(pll->reg_base + PLL6553_CON1_REG);
+	mdiv = (pll_con0 >> PLL6553_MDIV_SHIFT) & PLL6553_MDIV_MASK;
+	pdiv = (pll_con0 >> PLL6553_PDIV_SHIFT) & PLL6553_PDIV_MASK;
+	sdiv = (pll_con0 >> PLL6553_SDIV_SHIFT) & PLL6553_SDIV_MASK;
+	kdiv = (pll_con1 >> PLL6553_KDIV_SHIFT) & PLL6553_KDIV_MASK;
+
+	fvco *= (mdiv << 16) + kdiv;
+	do_div(fvco, (pdiv << sdiv));
+	fvco >>= 16;
+
+	return (unsigned long)fvco;
+}
+
+static const struct clk_ops samsung_pll6553_clk_ops = {
+	.recalc_rate = samsung_pll6553_recalc_rate,
+};
+
+struct clk * __init samsung_clk_register_pll6553(const char *name,
+					const char *pname, void __iomem *base)
+{
+	struct samsung_clk_pll6553 *pll;
+	struct clk *clk;
+	struct clk_init_data init;
+
+	pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+	if (!pll) {
+		pr_err("%s: could not allocate pll clk %s\n", __func__, name);
+		return NULL;
+	}
+
+	init.name = name;
+	init.ops = &samsung_pll6553_clk_ops;
+	init.parent_names = &pname;
+	init.num_parents = 1;
+
+	pll->hw.init = &init;
+	pll->reg_base = base;
+
+	clk = clk_register(NULL, &pll->hw);
+	if (IS_ERR(clk)) {
+		pr_err("%s: failed to register pll clock %s\n", __func__,
+				name);
+		kfree(pll);
+	}
+
+	if (clk_register_clkdev(clk, name, NULL))
+		pr_err("%s: failed to register lookup for %s", __func__, name);
+
+	return clk;
+}
+
 /*
  * PLL2550x Clock Type
  */

drivers/clk/samsung/clk-pll.h

@@ -34,6 +34,10 @@ extern struct clk * __init samsung_clk_register_pll45xx(const char *name,
 extern struct clk * __init samsung_clk_register_pll46xx(const char *name,
 			const char *pname, const void __iomem *con_reg,
 			enum pll46xx_type type);
+extern struct clk *samsung_clk_register_pll6552(const char *name,
+			const char *pname, void __iomem *base);
+extern struct clk *samsung_clk_register_pll6553(const char *name,
+			const char *pname, void __iomem *base);
 extern struct clk * __init samsung_clk_register_pll2550x(const char *name,
 			const char *pname, const void __iomem *reg_base,
 			const unsigned long offset);