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Message-Id: <20240222030235.27815-9-semen.protsenko@linaro.org>
Date: Wed, 21 Feb 2024 21:02:28 -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 v2 08/15] clk: samsung: Pass register layout type explicitly to CLK_CPU()
Use a dedicated enum field to explicitly specify which register layout
should be used for the CPU clock, instead of passing it as a bit flag.
This way it would be possible to keep the chip-specific data in some
array, where each chip structure could be accessed by its corresponding
layout index. It prepares clk-cpu.c for adding new chips support, which
might have different data for different CPU clusters.
No functional change.
Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
Changes in v2:
- Improved the commit message: explained why enum is needed for
specifying the layout (vs bit flag)
- Included clk-cpu.h in clk.h as it uses enum exynos_cpuclk_layout
from clk-cpu.h (it's needed because preceding patch adding headers
was dropped)
drivers/clk/samsung/clk-cpu.c | 2 +-
drivers/clk/samsung/clk-cpu.h | 12 ++++++++++--
drivers/clk/samsung/clk-exynos3250.c | 2 +-
drivers/clk/samsung/clk-exynos4.c | 6 +++---
drivers/clk/samsung/clk-exynos5250.c | 3 ++-
drivers/clk/samsung/clk-exynos5420.c | 8 ++++----
drivers/clk/samsung/clk-exynos5433.c | 8 ++++----
drivers/clk/samsung/clk.h | 5 ++++-
8 files changed, 29 insertions(+), 17 deletions(-)
diff --git a/drivers/clk/samsung/clk-cpu.c b/drivers/clk/samsung/clk-cpu.c
index 82d54b0c9040..635ab8cc54a2 100644
--- a/drivers/clk/samsung/clk-cpu.c
+++ b/drivers/clk/samsung/clk-cpu.c
@@ -465,7 +465,7 @@ static int __init exynos_register_cpu_clock(struct samsung_clk_provider *ctx,
cpuclk->lock = &ctx->lock;
cpuclk->flags = clk_data->flags;
cpuclk->clk_nb.notifier_call = exynos_cpuclk_notifier_cb;
- if (clk_data->flags & CLK_CPU_HAS_E5433_REGS_LAYOUT) {
+ if (clk_data->reg_layout == CPUCLK_LAYOUT_E5433) {
cpuclk->pre_rate_cb = exynos5433_cpuclk_pre_rate_change;
cpuclk->post_rate_cb = exynos5433_cpuclk_post_rate_change;
} else {
diff --git a/drivers/clk/samsung/clk-cpu.h b/drivers/clk/samsung/clk-cpu.h
index ee57f3638fed..4382ab005ad3 100644
--- a/drivers/clk/samsung/clk-cpu.h
+++ b/drivers/clk/samsung/clk-cpu.h
@@ -12,8 +12,16 @@
#define CLK_CPU_HAS_DIV1 BIT(0)
/* When ALT parent is active, debug clocks need safe divider values */
#define CLK_CPU_NEEDS_DEBUG_ALT_DIV BIT(1)
-/* The CPU clock registers have Exynos5433-compatible layout */
-#define CLK_CPU_HAS_E5433_REGS_LAYOUT BIT(2)
+
+/**
+ * enum exynos_cpuclk_layout - CPU clock registers layout compatibility
+ * @CPUCLK_LAYOUT_E4210: Exynos4210 compatible layout
+ * @CPUCLK_LAYOUT_E5433: Exynos5433 compatible layout
+ */
+enum exynos_cpuclk_layout {
+ CPUCLK_LAYOUT_E4210,
+ CPUCLK_LAYOUT_E5433,
+};
/**
* struct exynos_cpuclk_cfg_data - config data to setup cpu clocks
diff --git a/drivers/clk/samsung/clk-exynos3250.c b/drivers/clk/samsung/clk-exynos3250.c
index bf149fae04c3..cd4fec323a42 100644
--- a/drivers/clk/samsung/clk-exynos3250.c
+++ b/drivers/clk/samsung/clk-exynos3250.c
@@ -775,7 +775,7 @@ static const struct exynos_cpuclk_cfg_data e3250_armclk_d[] __initconst = {
static const struct samsung_cpu_clock exynos3250_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
- CLK_CPU_HAS_DIV1, 0x14000, e3250_armclk_d),
+ CLK_CPU_HAS_DIV1, 0x14000, CPUCLK_LAYOUT_E4210, e3250_armclk_d),
};
static void __init exynos3_core_down_clock(void __iomem *reg_base)
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index d5b1e9f49d8b..a026ccca7315 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -1253,19 +1253,19 @@ static const struct exynos_cpuclk_cfg_data e4412_armclk_d[] __initconst = {
static const struct samsung_cpu_clock exynos4210_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_SCLK_MPLL,
CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14000,
- e4210_armclk_d),
+ CPUCLK_LAYOUT_E4210, e4210_armclk_d),
};
static const struct samsung_cpu_clock exynos4212_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14000,
- e4212_armclk_d),
+ CPUCLK_LAYOUT_E4210, e4212_armclk_d),
};
static const struct samsung_cpu_clock exynos4412_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL_USER_C,
CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14000,
- e4412_armclk_d),
+ CPUCLK_LAYOUT_E4210, e4412_armclk_d),
};
/* register exynos4 clocks */
diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index 58df80de52ef..e02e7c013f3d 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -777,7 +777,8 @@ static const struct exynos_cpuclk_cfg_data exynos5250_armclk_d[] __initconst = {
static const struct samsung_cpu_clock exynos5250_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MPLL,
- CLK_CPU_HAS_DIV1, 0x0, exynos5250_armclk_d),
+ CLK_CPU_HAS_DIV1, 0x0, CPUCLK_LAYOUT_E4210,
+ exynos5250_armclk_d),
};
static const struct of_device_id ext_clk_match[] __initconst = {
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index bd7b304d2c00..c630135c686b 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -1556,16 +1556,16 @@ static const struct exynos_cpuclk_cfg_data exynos5420_kfcclk_d[] __initconst = {
static const struct samsung_cpu_clock exynos5420_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MSPLL_CPU, 0,
- 0x0, exynos5420_eglclk_d),
+ 0x0, CPUCLK_LAYOUT_E4210, exynos5420_eglclk_d),
CPU_CLK(CLK_KFC_CLK, "kfcclk", CLK_MOUT_KPLL, CLK_MOUT_MSPLL_KFC, 0,
- 0x28000, exynos5420_kfcclk_d),
+ 0x28000, CPUCLK_LAYOUT_E4210, exynos5420_kfcclk_d),
};
static const struct samsung_cpu_clock exynos5800_cpu_clks[] __initconst = {
CPU_CLK(CLK_ARM_CLK, "armclk", CLK_MOUT_APLL, CLK_MOUT_MSPLL_CPU, 0,
- 0x0, exynos5800_eglclk_d),
+ 0x0, CPUCLK_LAYOUT_E4210, exynos5800_eglclk_d),
CPU_CLK(CLK_KFC_CLK, "kfcclk", CLK_MOUT_KPLL, CLK_MOUT_MSPLL_KFC, 0,
- 0x28000, exynos5420_kfcclk_d),
+ 0x28000, CPUCLK_LAYOUT_E4210, exynos5420_kfcclk_d),
};
static const struct of_device_id ext_clk_match[] __initconst = {
diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c
index d3779eefb438..609d31a7aa52 100644
--- a/drivers/clk/samsung/clk-exynos5433.c
+++ b/drivers/clk/samsung/clk-exynos5433.c
@@ -3700,8 +3700,8 @@ static const struct exynos_cpuclk_cfg_data exynos5433_apolloclk_d[] __initconst
static const struct samsung_cpu_clock apollo_cpu_clks[] __initconst = {
CPU_CLK(CLK_SCLK_APOLLO, "apolloclk", CLK_MOUT_APOLLO_PLL,
- CLK_MOUT_BUS_PLL_APOLLO_USER, CLK_CPU_HAS_E5433_REGS_LAYOUT,
- 0x0, exynos5433_apolloclk_d),
+ CLK_MOUT_BUS_PLL_APOLLO_USER, 0, 0x0,
+ CPUCLK_LAYOUT_E5433, exynos5433_apolloclk_d),
};
static const struct samsung_cmu_info apollo_cmu_info __initconst = {
@@ -3944,8 +3944,8 @@ static const struct exynos_cpuclk_cfg_data exynos5433_atlasclk_d[] __initconst =
static const struct samsung_cpu_clock atlas_cpu_clks[] __initconst = {
CPU_CLK(CLK_SCLK_ATLAS, "atlasclk", CLK_MOUT_ATLAS_PLL,
- CLK_MOUT_BUS_PLL_ATLAS_USER, CLK_CPU_HAS_E5433_REGS_LAYOUT,
- 0x0, exynos5433_atlasclk_d),
+ CLK_MOUT_BUS_PLL_ATLAS_USER, 0, 0x0,
+ CPUCLK_LAYOUT_E5433, exynos5433_atlasclk_d),
};
static const struct samsung_cmu_info atlas_cmu_info __initconst = {
diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
index 516b716407e5..a763309e6f12 100644
--- a/drivers/clk/samsung/clk.h
+++ b/drivers/clk/samsung/clk.h
@@ -12,6 +12,7 @@
#include <linux/clk-provider.h>
#include "clk-pll.h"
+#include "clk-cpu.h"
/**
* struct samsung_clk_provider - information about clock provider
@@ -282,10 +283,11 @@ struct samsung_cpu_clock {
unsigned int alt_parent_id;
unsigned long flags;
int offset;
+ enum exynos_cpuclk_layout reg_layout;
const struct exynos_cpuclk_cfg_data *cfg;
};
-#define CPU_CLK(_id, _name, _pid, _apid, _flags, _offset, _cfg) \
+#define CPU_CLK(_id, _name, _pid, _apid, _flags, _offset, _layout, _cfg) \
{ \
.id = _id, \
.name = _name, \
@@ -293,6 +295,7 @@ struct samsung_cpu_clock {
.alt_parent_id = _apid, \
.flags = _flags, \
.offset = _offset, \
+ .reg_layout = _layout, \
.cfg = _cfg, \
}
--
2.39.2
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