linux-kernel - [PATCH 5/6] ARM: Exynos: switch to using generic cpufreq driver for Exynos4x12

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Message-id: <1428688742-15578-6-git-send-email-b.zolnierkie@samsung.com>
Date:	Fri, 10 Apr 2015 19:59:01 +0200
From:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:	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>
Cc:	Tomasz Figa <tomasz.figa@...il.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Kevin Hilman <khilman@...aro.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	b.zolnierkie@...sung.com
Subject: [PATCH 5/6] ARM: Exynos: switch to using generic cpufreq driver for
 Exynos4x12

The new CPU clock type allows the use of generic CPUfreq driver.
Switch Exynos4x12 to using generic cpufreq driver.

This patch also takes care of making ARM_EXYNOS_CPU_FREQ_BOOST_SW
config option depend on cpufreq-dt driver instead of exynos-cpufreq
one and fixes the minor issue present with the old code (support
for 'boost' mode in the exynos-cpufreq driver was enabled for all
supported SoCs even though 'boost' frequency was provided only for
Exynos4x12 ones).

Cc: Tomasz Figa <tomasz.figa@...il.com>
Cc: Kukjin Kim <kgene.kim@...sung.com>
Cc: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Cc: Thomas Abraham <thomas.ab@...sung.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
 arch/arm/mach-exynos/exynos.c    |   14 ++++++++++++++
 drivers/cpufreq/Kconfig.arm      |    2 +-
 drivers/cpufreq/exynos-cpufreq.c |    3 ---
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 4e13de5..637d862 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -20,6 +20,7 @@
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/irqchip.h>
+#include <linux/cpufreq-dt.h>
 
 #include <asm/cacheflush.h>
 #include <asm/hardware/cache-l2x0.h>
@@ -197,6 +198,12 @@ static void __init exynos_init_irq(void)
 	exynos_map_pmu();
 }
 
+struct cpufreq_dt_platform_data cpufreq_dt_pd = {
+#ifdef CONFIG_ARM_EXYNOS_CPU_FREQ_BOOST_SW
+	.boost_supported = true,
+#endif
+};
+
 static const struct of_device_id exynos_cpufreq_matches[] = {
 	{ .compatible = "samsung,exynos4210", .data = "cpufreq-dt" },
 	{ /* sentinel */ }
@@ -207,6 +214,13 @@ static void __init exynos_cpufreq_init(void)
 	struct device_node *root = of_find_node_by_path("/");
 	const struct of_device_id *match;
 
+	if (of_machine_is_compatible("samsung,exynos4212") ||
+	    of_machine_is_compatible("samsung,exynos4412")) {
+		platform_device_register_data(NULL, "cpufreq-dt", -1,
+					&cpufreq_dt_pd, sizeof(cpufreq_dt_pd));
+		return;
+	}
+
 	match = of_match_node(exynos_cpufreq_matches, root);
 	if (!match) {
 		platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 1d7ddc5..78cb0b9 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -60,7 +60,7 @@ config ARM_EXYNOS5250_CPUFREQ
 
 config ARM_EXYNOS_CPU_FREQ_BOOST_SW
 	bool "EXYNOS Frequency Overclocking - Software"
-	depends on ARM_EXYNOS_CPUFREQ && THERMAL
+	depends on CPUFREQ_DT && THERMAL
 	select CPU_FREQ_BOOST_SW
 	select EXYNOS_THERMAL
 	help
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 2d78f63..e48d4f1 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -125,9 +125,6 @@ static struct cpufreq_driver exynos_driver = {
 	.init		= exynos_cpufreq_cpu_init,
 	.name		= "exynos_cpufreq",
 	.attr		= cpufreq_generic_attr,
-#ifdef CONFIG_ARM_EXYNOS_CPU_FREQ_BOOST_SW
-	.boost_supported = true,
-#endif
 #ifdef CONFIG_PM
 	.suspend	= cpufreq_generic_suspend,
 #endif
-- 
1.7.9.5

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