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Date: Wed, 22 Apr 2015 10:10:17 +0200
From: Lukasz Majewski <l.majewski@...sung.com>
To: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc: Thomas Abraham <thomas.ab@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Mike Turquette <mturquette@...aro.org>,
Kukjin Kim <kgene.kim@...sung.com>,
Kukjin Kim <kgene@...nel.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Kevin Hilman <khilman@...aro.org>,
Heiko Stuebner <heiko@...ech.de>, linux-pm@...r.kernel.org,
Tomasz Figa <tomasz.figa@...il.com>,
linux-kernel@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>,
linux-samsung-soc@...r.kernel.org,
Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/8] clk: samsung: exynos5420: add cpu clock configuration
data and instantiate cpu clock
Hi Bartlomiej,
> From: Thomas Abraham <thomas.ab@...sung.com>
>
> With the addition of the new Samsung specific cpu-clock type, the
> arm clock can be represented as a cpu-clock type. Add the CPU clock
> configuration data and instantiate the CPU clock type for Exynos5420.
>
> Changes by Bartlomiej:
> - split Exynos5420 support from the original patches
> - moved E5420_[EGL,KFC]_DIV0() macros to clk-exynos5420.c
>
> Cc: Tomasz Figa <tomasz.figa@...il.com>
> Cc: Mike Turquette <mturquette@...aro.org>
> Cc: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> Signed-off-by: Thomas Abraham <thomas.ab@...sung.com>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> ---
> drivers/clk/samsung/clk-exynos5420.c | 58
> ++++++++++++++++++++++++++++++--
> include/dt-bindings/clock/exynos5420.h | 2 ++ 2 files changed, 58
> insertions(+), 2 deletions(-)
>
> diff --git a/drivers/clk/samsung/clk-exynos5420.c
> b/drivers/clk/samsung/clk-exynos5420.c index 07d666c..9398a2d 100644
> --- a/drivers/clk/samsung/clk-exynos5420.c
> +++ b/drivers/clk/samsung/clk-exynos5420.c
> @@ -19,6 +19,7 @@
> #include <linux/syscore_ops.h>
>
> #include "clk.h"
> +#include "clk-cpu.h"
>
> #define APLL_LOCK 0x0
> #define APLL_CON0 0x100
> @@ -616,9 +617,11 @@ static struct samsung_mux_clock
> exynos5x_mux_clks[] __initdata = { MUX(0, "mout_mspll_kfc",
> mout_mspll_cpu_p, SRC_TOP7, 8, 2), MUX(0, "mout_mspll_cpu",
> mout_mspll_cpu_p, SRC_TOP7, 12, 2),
> - MUX(0, "mout_apll", mout_apll_p, SRC_CPU, 0, 1),
> + MUX_F(0, "mout_apll", mout_apll_p, SRC_CPU, 0, 1,
> + CLK_SET_RATE_PARENT, 0),
> MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
> - MUX(0, "mout_kpll", mout_kpll_p, SRC_KFC, 0, 1),
> + MUX_F(0, "mout_kpll", mout_kpll_p, SRC_KFC, 0, 1,
> + CLK_SET_RATE_PARENT, 0),
> MUX(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1),
>
> MUX(0, "mout_aclk200", mout_group1_p, SRC_TOP0, 8, 2),
> @@ -1246,6 +1249,50 @@ static struct samsung_pll_clock
> exynos5x_plls[nr_plls] __initdata = { KPLL_CON0, NULL),
> };
>
> +#define E5420_EGL_DIV0(apll, pclk_dbg, atb,
> cpud) \
> + ((((apll) << 24) | ((pclk_dbg) << 20) | ((atb) <<
> 16) | \
> + ((cpud) << 4)))
> +
> +static const struct exynos_cpuclk_cfg_data exynos5420_eglclk_d[]
> __initconst = {
> + { 1800000, E5420_EGL_DIV0(3, 7, 7, 4), },
> + { 1700000, E5420_EGL_DIV0(3, 7, 7, 3), },
> + { 1600000, E5420_EGL_DIV0(3, 7, 7, 3), },
> + { 1500000, E5420_EGL_DIV0(3, 7, 7, 3), },
> + { 1400000, E5420_EGL_DIV0(3, 7, 7, 3), },
> + { 1300000, E5420_EGL_DIV0(3, 7, 7, 2), },
> + { 1200000, E5420_EGL_DIV0(3, 7, 7, 2), },
> + { 1100000, E5420_EGL_DIV0(3, 7, 7, 2), },
> + { 1000000, E5420_EGL_DIV0(3, 6, 6, 2), },
> + { 900000, E5420_EGL_DIV0(3, 6, 6, 2), },
> + { 800000, E5420_EGL_DIV0(3, 5, 5, 2), },
> + { 700000, E5420_EGL_DIV0(3, 5, 5, 2), },
> + { 600000, E5420_EGL_DIV0(3, 4, 4, 2), },
> + { 500000, E5420_EGL_DIV0(3, 3, 3, 2), },
> + { 400000, E5420_EGL_DIV0(3, 3, 3, 2), },
> + { 300000, E5420_EGL_DIV0(3, 3, 3, 2), },
> + { 200000, E5420_EGL_DIV0(3, 3, 3, 2), },
> + { 0 },
> +};
> +
> +#define E5420_KFC_DIV(kpll, pclk,
> aclk) \
> + ((((kpll) << 24) | ((pclk) << 20) | ((aclk) << 4)))
> +
> +static const struct exynos_cpuclk_cfg_data exynos5420_kfcclk_d[]
> __initconst = {
> + { 1300000, E5420_KFC_DIV(3, 5, 2), },
> + { 1200000, E5420_KFC_DIV(3, 5, 2), },
> + { 1100000, E5420_KFC_DIV(3, 5, 2), },
> + { 1000000, E5420_KFC_DIV(3, 5, 2), },
> + { 900000, E5420_KFC_DIV(3, 5, 2), },
> + { 800000, E5420_KFC_DIV(3, 5, 2), },
> + { 700000, E5420_KFC_DIV(3, 4, 2), },
> + { 600000, E5420_KFC_DIV(3, 4, 2), },
> + { 500000, E5420_KFC_DIV(3, 4, 2), },
> + { 400000, E5420_KFC_DIV(3, 3, 2), },
> + { 300000, E5420_KFC_DIV(3, 3, 2), },
> + { 200000, E5420_KFC_DIV(3, 3, 2), },
> + { 0 },
> +};
> +
> static const struct of_device_id ext_clk_match[] __initconst = {
> { .compatible = "samsung,exynos5420-oscclk", .data = (void
> *)0, }, { },
> @@ -1310,6 +1357,13 @@ static void __init exynos5x_clk_init(struct
> device_node *np, ARRAY_SIZE(exynos5800_gate_clks));
> }
>
> + exynos_register_cpu_clock(ctx, CLK_ARM_CLK, "armclk",
> + mout_cpu_p[0], mout_cpu_p[1], 0x200,
> + exynos5420_eglclk_d,
> ARRAY_SIZE(exynos5420_eglclk_d), 0);
> + exynos_register_cpu_clock(ctx, CLK_KFC_CLK, "kfcclk",
> + mout_kfc_p[0], mout_kfc_p[1], 0x28200,
> + exynos5420_kfcclk_d,
> ARRAY_SIZE(exynos5420_kfcclk_d), 0); +
> exynos5420_clk_sleep_init();
>
> samsung_clk_of_add_provider(np, ctx);
> diff --git a/include/dt-bindings/clock/exynos5420.h
> b/include/dt-bindings/clock/exynos5420.h index 99da0d1..dde9664 100644
> --- a/include/dt-bindings/clock/exynos5420.h
> +++ b/include/dt-bindings/clock/exynos5420.h
> @@ -25,6 +25,8 @@
> #define CLK_FOUT_MPLL 10
> #define CLK_FOUT_BPLL 11
> #define CLK_FOUT_KPLL 12
> +#define CLK_ARM_CLK 13
> +#define CLK_KFC_CLK 14
>
> /* gate for special clocks (sclk) */
> #define CLK_SCLK_UART0 128
Reviewed-by: Lukasz Majewski <l.majewski@...sung.com>
--
Best regards,
Lukasz Majewski
Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
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