clk: samsung: Group CPU clock functions by chip

clk-cpu.c is going to get messy as new chips support is added.
Restructure the code by pulling related functions and definitions
together, grouping those by their relation to a particular chip or other
categories, to simplify the code navigation.

No functional change.

Signed-off-by: Sam Protsenko <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Krzysztof Kozlowski <[email protected]>

Author: Sam Protsenko

drivers/clk/samsung/clk-cpu.c

@@ -38,34 +38,6 @@
 #include "clk.h"
 #include "clk-cpu.h"
 
-#define E4210_SRC_CPU		0x0
-#define E4210_STAT_CPU		0x200
-#define E4210_DIV_CPU0		0x300
-#define E4210_DIV_CPU1		0x304
-#define E4210_DIV_STAT_CPU0	0x400
-#define E4210_DIV_STAT_CPU1	0x404
-
-#define E5433_MUX_SEL2		0x008
-#define E5433_MUX_STAT2		0x208
-#define E5433_DIV_CPU0		0x400
-#define E5433_DIV_CPU1		0x404
-#define E5433_DIV_STAT_CPU0	0x500
-#define E5433_DIV_STAT_CPU1	0x504
-
-#define E4210_DIV0_RATIO0_MASK	GENMASK(2, 0)
-#define E4210_DIV1_HPM_MASK	GENMASK(6, 4)
-#define E4210_DIV1_COPY_MASK	GENMASK(2, 0)
-#define E4210_MUX_HPM_MASK	BIT(20)
-#define E4210_DIV0_ATB_SHIFT	16
-#define E4210_DIV0_ATB_MASK	(DIV_MASK << E4210_DIV0_ATB_SHIFT)
-
-/* Divider stabilization time, msec */
-#define MAX_STAB_TIME		10
-#define MAX_DIV			8
-#define DIV_MASK		GENMASK(2, 0)
-#define DIV_MASK_ALL		GENMASK(31, 0)
-#define MUX_MASK		GENMASK(2, 0)
-
 struct exynos_cpuclk;
 
 typedef int (*exynos_rate_change_fn_t)(struct clk_notifier_data *ndata,
@@ -103,6 +75,15 @@ struct exynos_cpuclk {
 	exynos_rate_change_fn_t			post_rate_cb;
 };
 
+/* ---- Common code --------------------------------------------------------- */
+
+/* Divider stabilization time, msec */
+#define MAX_STAB_TIME		10
+#define MAX_DIV			8
+#define DIV_MASK		GENMASK(2, 0)
+#define DIV_MASK_ALL		GENMASK(31, 0)
+#define MUX_MASK		GENMASK(2, 0)
+
 /*
  * Helper function to wait until divider(s) have stabilized after the divider
  * value has changed.
@@ -142,33 +123,21 @@ static void wait_until_mux_stable(void __iomem *mux_reg, u32 mux_pos,
 	pr_err("%s: re-parenting mux timed-out\n", __func__);
 }
 
-/* common round rate callback usable for all types of CPU clocks */
-static long exynos_cpuclk_round_rate(struct clk_hw *hw, unsigned long drate,
-				     unsigned long *prate)
-{
-	struct clk_hw *parent = clk_hw_get_parent(hw);
-	*prate = clk_hw_round_rate(parent, drate);
-	return *prate;
-}
+/* ---- Exynos 3/4/5 -------------------------------------------------------- */
 
-/* common recalc rate callback usable for all types of CPU clocks */
-static unsigned long exynos_cpuclk_recalc_rate(struct clk_hw *hw,
-					       unsigned long parent_rate)
-{
-	/*
-	 * The CPU clock output (armclk) rate is the same as its parent
-	 * rate. Although there exist certain dividers inside the CPU
-	 * clock block that could be used to divide the parent clock,
-	 * the driver does not make use of them currently, except during
-	 * frequency transitions.
-	 */
-	return parent_rate;
-}
+#define E4210_SRC_CPU		0x0
+#define E4210_STAT_CPU		0x200
+#define E4210_DIV_CPU0		0x300
+#define E4210_DIV_CPU1		0x304
+#define E4210_DIV_STAT_CPU0	0x400
+#define E4210_DIV_STAT_CPU1	0x404
 
-static const struct clk_ops exynos_cpuclk_clk_ops = {
-	.recalc_rate = exynos_cpuclk_recalc_rate,
-	.round_rate = exynos_cpuclk_round_rate,
-};
+#define E4210_DIV0_RATIO0_MASK	GENMASK(2, 0)
+#define E4210_DIV1_HPM_MASK	GENMASK(6, 4)
+#define E4210_DIV1_COPY_MASK	GENMASK(2, 0)
+#define E4210_MUX_HPM_MASK	BIT(20)
+#define E4210_DIV0_ATB_SHIFT	16
+#define E4210_DIV0_ATB_MASK	(DIV_MASK << E4210_DIV0_ATB_SHIFT)
 
 /*
  * Helper function to set the 'safe' dividers for the CPU clock. The parameters
@@ -300,6 +269,15 @@ static int exynos_cpuclk_post_rate_change(struct clk_notifier_data *ndata,
 	return 0;
 }
 
+/* ---- Exynos5433 ---------------------------------------------------------- */
+
+#define E5433_MUX_SEL2		0x008
+#define E5433_MUX_STAT2		0x208
+#define E5433_DIV_CPU0		0x400
+#define E5433_DIV_CPU1		0x404
+#define E5433_DIV_STAT_CPU0	0x500
+#define E5433_DIV_STAT_CPU1	0x504
+
 /*
  * Helper function to set the 'safe' dividers for the CPU clock. The parameters
  * div and mask contain the divider value and the register bit mask of the
@@ -398,6 +376,36 @@ static int exynos5433_cpuclk_post_rate_change(struct clk_notifier_data *ndata,
 	return 0;
 }
 
+/* -------------------------------------------------------------------------- */
+
+/* Common round rate callback usable for all types of CPU clocks */
+static long exynos_cpuclk_round_rate(struct clk_hw *hw, unsigned long drate,
+				     unsigned long *prate)
+{
+	struct clk_hw *parent = clk_hw_get_parent(hw);
+	*prate = clk_hw_round_rate(parent, drate);
+	return *prate;
+}
+
+/* Common recalc rate callback usable for all types of CPU clocks */
+static unsigned long exynos_cpuclk_recalc_rate(struct clk_hw *hw,
+					       unsigned long parent_rate)
+{
+	/*
+	 * The CPU clock output (armclk) rate is the same as its parent
+	 * rate. Although there exist certain dividers inside the CPU
+	 * clock block that could be used to divide the parent clock,
+	 * the driver does not make use of them currently, except during
+	 * frequency transitions.
+	 */
+	return parent_rate;
+}
+
+static const struct clk_ops exynos_cpuclk_clk_ops = {
+	.recalc_rate = exynos_cpuclk_recalc_rate,
+	.round_rate = exynos_cpuclk_round_rate,
+};
+
 /*
  * This notifier function is called for the pre-rate and post-rate change
  * notifications of the parent clock of cpuclk.