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Message-Id: <20230416133422.1949-7-aweber.kernel@gmail.com>
Date: Sun, 16 Apr 2023 15:34:16 +0200
From: Artur Weber <aweber.kernel@...il.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Alim Akhtar <alim.akhtar@...sung.com>,
Rob Herring <robh+dt@...nel.org>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Tomasz Figa <tomasz.figa@...il.com>,
Chanwoo Choi <cw00.choi@...sung.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
Olof Johansson <olof@...om.net>, soc@...nel.org,
Russell King <linux@...linux.org.uk>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Kukjin Kim <kgene@...nel.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...nel.org>,
linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
linux-pm@...r.kernel.org, linux-media@...r.kernel.org,
linux-phy@...ts.infradead.org,
~postmarketos/upstreaming@...ts.sr.ht,
Artur Weber <aweber.kernel@...il.com>
Subject: [PATCH v2 06/12] clk: samsung: Re-add support for Exynos4212 CPU clock
The platform was originally dropped in commit bca9085e0ae9 ("ARM:
dts: exynos: remove Exynos4212 support (dead code)"), as there were
no boards using it.
We will be adding a device that uses it, so add it back.
This is effectively a revert of commit c9194fb623b0 ("clk: samsung:
Remove support for obsolete Exynos4212 CPU clock"); the driver
has changed significantly since then, prompting this re-make.
Signed-off-by: Artur Weber <aweber.kernel@...il.com>
---
drivers/clk/samsung/clk-exynos4.c | 44 +++++++++++++++++++++++++++----
1 file changed, 39 insertions(+), 5 deletions(-)
diff --git a/drivers/clk/samsung/clk-exynos4.c b/drivers/clk/samsung/clk-exynos4.c
index 22009cb53428..9655f46db95c 100644
--- a/drivers/clk/samsung/clk-exynos4.c
+++ b/drivers/clk/samsung/clk-exynos4.c
@@ -138,7 +138,8 @@
/* the exynos4 soc type */
enum exynos4_soc {
EXYNOS4210,
- EXYNOS4X12,
+ EXYNOS4412,
+ EXYNOS4212,
};
/* list of PLLs to be registered */
@@ -1205,6 +1206,24 @@ static const struct exynos_cpuclk_cfg_data e4210_armclk_d[] __initconst = {
{ 0 },
};
+static const struct exynos_cpuclk_cfg_data e4212_armclk_d[] __initconst = {
+ { 1500000, E4210_CPU_DIV0(2, 1, 6, 0, 7, 3), E4210_CPU_DIV1(2, 6), },
+ { 1400000, E4210_CPU_DIV0(2, 1, 6, 0, 7, 3), E4210_CPU_DIV1(2, 6), },
+ { 1300000, E4210_CPU_DIV0(2, 1, 5, 0, 7, 3), E4210_CPU_DIV1(2, 5), },
+ { 1200000, E4210_CPU_DIV0(2, 1, 5, 0, 7, 3), E4210_CPU_DIV1(2, 5), },
+ { 1100000, E4210_CPU_DIV0(2, 1, 4, 0, 6, 3), E4210_CPU_DIV1(2, 4), },
+ { 1000000, E4210_CPU_DIV0(1, 1, 4, 0, 5, 2), E4210_CPU_DIV1(2, 4), },
+ { 900000, E4210_CPU_DIV0(1, 1, 3, 0, 5, 2), E4210_CPU_DIV1(2, 3), },
+ { 800000, E4210_CPU_DIV0(1, 1, 3, 0, 5, 2), E4210_CPU_DIV1(2, 3), },
+ { 700000, E4210_CPU_DIV0(1, 1, 3, 0, 4, 2), E4210_CPU_DIV1(2, 3), },
+ { 600000, E4210_CPU_DIV0(1, 1, 3, 0, 4, 2), E4210_CPU_DIV1(2, 3), },
+ { 500000, E4210_CPU_DIV0(1, 1, 3, 0, 4, 2), E4210_CPU_DIV1(2, 3), },
+ { 400000, E4210_CPU_DIV0(1, 1, 3, 0, 4, 2), E4210_CPU_DIV1(2, 3), },
+ { 300000, E4210_CPU_DIV0(1, 1, 2, 0, 4, 2), E4210_CPU_DIV1(2, 3), },
+ { 200000, E4210_CPU_DIV0(1, 1, 1, 0, 3, 1), E4210_CPU_DIV1(2, 3), },
+ { 0 },
+};
+
#define E4412_CPU_DIV1(cores, hpm, copy) \
(((cores) << 8) | ((hpm) << 4) | ((copy) << 0))
@@ -1233,6 +1252,11 @@ static const struct samsung_cpu_clock exynos4210_cpu_clks[] __initconst = {
CLK_CPU_NEEDS_DEBUG_ALT_DIV | CLK_CPU_HAS_DIV1, 0x14200, 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, 0x14200, 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, 0x14200, e4412_armclk_d),
@@ -1326,11 +1350,15 @@ static void __init exynos4_clk_init(struct device_node *np,
samsung_clk_register_fixed_factor(ctx,
exynos4x12_fixed_factor_clks,
ARRAY_SIZE(exynos4x12_fixed_factor_clks));
- samsung_clk_register_cpu(ctx, exynos4412_cpu_clks,
- ARRAY_SIZE(exynos4412_cpu_clks));
+ if (soc == EXYNOS4412)
+ samsung_clk_register_cpu(ctx, exynos4412_cpu_clks,
+ ARRAY_SIZE(exynos4412_cpu_clks));
+ else
+ samsung_clk_register_cpu(ctx, exynos4212_cpu_clks,
+ ARRAY_SIZE(exynos4212_cpu_clks));
}
- if (soc == EXYNOS4X12)
+ if (soc == EXYNOS4412 || soc == EXYNOS4212)
exynos4x12_core_down_clock();
samsung_clk_extended_sleep_init(reg_base,
@@ -1363,8 +1391,14 @@ static void __init exynos4210_clk_init(struct device_node *np)
}
CLK_OF_DECLARE(exynos4210_clk, "samsung,exynos4210-clock", exynos4210_clk_init);
+static void __init exynos4212_clk_init(struct device_node *np)
+{
+ exynos4_clk_init(np, EXYNOS4212);
+}
+CLK_OF_DECLARE(exynos4212_clk, "samsung,exynos4212-clock", exynos4212_clk_init);
+
static void __init exynos4412_clk_init(struct device_node *np)
{
- exynos4_clk_init(np, EXYNOS4X12);
+ exynos4_clk_init(np, EXYNOS4412);
}
CLK_OF_DECLARE(exynos4412_clk, "samsung,exynos4412-clock", exynos4412_clk_init);
--
2.40.0
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