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Message-Id: <20240216223245.12273-7-semen.protsenko@linaro.org>
Date: Fri, 16 Feb 2024 16:32:35 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Chanwoo Choi <cw00.choi@...sung.com>
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Tomasz Figa <tomasz.figa@...il.com>,
linux-samsung-soc@...r.kernel.org,
linux-clk@...r.kernel.org,
devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 06/16] 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 <semen.protsenko@...aro.org>
---
drivers/clk/samsung/clk-cpu.c | 114 ++++++++++++++++++----------------
1 file changed, 61 insertions(+), 53 deletions(-)
diff --git a/drivers/clk/samsung/clk-cpu.c b/drivers/clk/samsung/clk-cpu.c
index 427018e8dd8c..d550a4bb632f 100644
--- a/drivers/clk/samsung/clk-cpu.c
+++ b/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.
--
2.39.2
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