[PATCH v12 4/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4210/5250/5420
From: Thomas Abraham <hidden>
Date: 2014-11-21 13:31:20
Also in:
linux-pm, linux-samsung-soc
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
The new CPU clock type allows the use of generic CPUfreq drivers. So for Exynos4210/5250, switch to using generic cpufreq driver. For Exynos5420, which did not have CPUfreq driver support, enable the use of generic CPUfreq driver. Suggested-by: Tomasz Figa <redacted> Cc: Kukjin Kim <redacted> Signed-off-by: Thomas Abraham <redacted> Reviewed-by: Tomasz Figa <redacted> Tested-by: Javier Martinez Canillas <redacted> Tested-by: Chander Kashyap <redacted> --- arch/arm/mach-exynos/exynos.c | 26 +++++++++++++++++++++++++- 1 files changed, 25 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 6b283eb..402a2ae 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c@@ -282,6 +282,30 @@ static void __init exynos_init_irq(void) exynos_map_pmu(); } +static const struct of_device_id exynos_cpufreq_matches[] = { + { .compatible = "samsung,exynos5420", .data = "arm-bL-cpufreq-dt" }, + { .compatible = "samsung,exynos5422", .data = "arm-bL-cpufreq-dt" }, + { .compatible = "samsung,exynos5800", .data = "arm-bL-cpufreq-dt" }, + { .compatible = "samsung,exynos5250", .data = "cpufreq-dt" }, + { .compatible = "samsung,exynos4210", .data = "cpufreq-dt" }, + { .compatible = "samsung,exynos5440", .data = "exynos5440-cpufreq" }, + { /* sentinel */ } +}; + +static void __init exynos_cpufreq_init(void) +{ + struct device_node *root = of_find_node_by_path("/"); + const struct of_device_id *match; + + match = of_match_node(exynos_cpufreq_matches, root); + if (!match) { + platform_device_register_simple("exynos-cpufreq", -1, NULL, 0); + return; + } + + platform_device_register_simple(match->data, -1, NULL, 0); +} + static void __init exynos_dt_machine_init(void) { struct device_node *i2c_np;
@@ -321,7 +345,7 @@ static void __init exynos_dt_machine_init(void) of_machine_is_compatible("samsung,exynos5250")) platform_device_register(&exynos_cpuidle); - platform_device_register_simple("exynos-cpufreq", -1, NULL, 0); + exynos_cpufreq_init(); of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); }
--
1.6.6.rc2