[v3,3/6] ARM: EXYNOS: Remove soc_is_exynos4/5 from exynos.c

Commit Message

Pankaj Dubey May 10, 2014, 7:20 a.m. UTC

This patch removes usage of soc_is_exynos4/5 from exynos.c.
For this we need to separate machine descriptors for exynos4
and exynos5. While doing this patch does some consolidation also.

CC: Russell King <[e-mail]>
CC: Thomas Abraham <[e-mail]>
Signed-off-by: Pankaj Dubey <[e-mail]>
---
 arch/arm/mach-exynos/exynos.c            |   52 +++++++++++++++++++-----------
 arch/arm/plat-samsung/include/plat/cpu.h |    3 --
 2 files changed, 33 insertions(+), 22 deletions(-)

Comments

Tomasz Figa June 10, 2014, 1:55 p.m. UTC | #1

On 10.05.2014 09:20, Pankaj Dubey wrote:
> This patch removes usage of soc_is_exynos4/5 from exynos.c.
> For this we need to separate machine descriptors for exynos4
> and exynos5. While doing this patch does some consolidation also.
> 
> CC: Russell King <[e-mail]>
> CC: Thomas Abraham <[e-mail]>
> Signed-off-by: Pankaj Dubey <[e-mail]>
> ---
>  arch/arm/mach-exynos/exynos.c            |   52 +++++++++++++++++++-----------
>  arch/arm/plat-samsung/include/plat/cpu.h |    3 --
>  2 files changed, 33 insertions(+), 22 deletions(-)
> 

I don't think this is needed. All those static mappings should just go
away, which will also eliminate the need to have separate machine
descriptor or soc_is_exynos{4,5}() macros.

Best regards,
Tomasz

Arnd Bergmann June 10, 2014, 2:04 p.m. UTC | #2

On Tuesday 10 June 2014 15:55:09 Tomasz Figa wrote:
> On 10.05.2014 09:20, Pankaj Dubey wrote:
> > This patch removes usage of soc_is_exynos4/5 from exynos.c.
> > For this we need to separate machine descriptors for exynos4
> > and exynos5. While doing this patch does some consolidation also.
> > 
> > CC: Russell King <[e-mail]>
> > CC: Thomas Abraham <[e-mail]>
> > Signed-off-by: Pankaj Dubey <[e-mail]>
> > ---
> >  arch/arm/mach-exynos/exynos.c            |   52 +++++++++++++++++++-----------
> >  arch/arm/plat-samsung/include/plat/cpu.h |    3 --
> >  2 files changed, 33 insertions(+), 22 deletions(-)
> > 
> 
> I don't think this is needed. All those static mappings should just go
> away, which will also eliminate the need to have separate machine
> descriptor or soc_is_exynos{4,5}() macros.

I think I suggested doing this patch as an intermediate step to
get rid of the macros first, so we don't get any new users.
I agree that we should also remove the static mappings eventually,
and once we do that, the machine descriptors can be unified again.

I have not checked which of the map_desc entries are currently used
at all, or what it would take to remove them.

	Arnd

Patch

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 09063ee..9902e52 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -202,20 +202,6 @@  static const struct of_device_id exynos_dt_pmu_match[] = {
 	{},
 };
 
-/*
- * exynos_map_io
- *
- * register the standard cpu IO areas
- */
-static void __init exynos_map_io(void)
-{
-	if (soc_is_exynos4())
-		iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
-
-	if (soc_is_exynos5())
-		iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
-}
-
 static void __init exynos_init_io(void)
 {
 	debug_ll_io_init();
@@ -224,8 +210,18 @@  static void __init exynos_init_io(void)
 
 	/* detect cpu id and rev. */
 	s5p_init_cpu(S5P_VA_CHIPID);
+}
+
+static void __init exynos5_init_io(void)
+{
+	exynos_init_io();
+	iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
+}
 
-	exynos_map_io();
+static void __init exynos4_init_io(void)
+{
+	exynos_init_io();
+	iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
 }
 
 struct bus_type exynos_subsys = {
@@ -293,11 +289,15 @@  static void __init exynos_dt_machine_init(void)
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
 
-static char const *exynos_dt_compat[] __initconst = {
+static char const *exynos4_dt_compat[] __initconst = {
 	"samsung,exynos4",
 	"samsung,exynos4210",
 	"samsung,exynos4212",
 	"samsung,exynos4412",
+	NULL
+};
+
+static char const *exynos5_dt_compat[] __initconst = {
 	"samsung,exynos5",
 	"samsung,exynos5250",
 	"samsung,exynos5420",
@@ -321,15 +321,29 @@  static void __init exynos_reserve(void)
 #endif
 }
 
-DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
+DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
+	/* Maintainer: Thomas Abraham <[e-mail]> */
+	/* Maintainer: Kukjin Kim <[e-mail]> */
+	.smp		= smp_ops(exynos_smp_ops),
+	.map_io		= exynos5_init_io,
+	.init_early	= exynos_firmware_init,
+	.init_machine	= exynos_dt_machine_init,
+	.init_late	= exynos_init_late,
+	.dt_compat	= exynos5_dt_compat,
+	.restart	= exynos_restart,
+	.reserve	= exynos_reserve,
+MACHINE_END
+
+
+DT_MACHINE_START(EXYNOS4_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
 	/* Maintainer: Thomas Abraham <[e-mail]> */
 	/* Maintainer: Kukjin Kim <[e-mail]> */
 	.smp		= smp_ops(exynos_smp_ops),
-	.map_io		= exynos_init_io,
+	.map_io		= exynos4_init_io,
 	.init_early	= exynos_firmware_init,
 	.init_machine	= exynos_dt_machine_init,
 	.init_late	= exynos_init_late,
-	.dt_compat	= exynos_dt_compat,
+	.dt_compat	= exynos4_dt_compat,
 	.restart	= exynos_restart,
 	.reserve	= exynos_reserve,
 MACHINE_END
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index 5992b8d..18a9a00 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -166,9 +166,6 @@  IS_SAMSUNG_CPU(exynos5440, EXYNOS5440_SOC_ID, EXYNOS5_SOC_MASK)
 # define soc_is_exynos5440()	0
 #endif
 
-#define soc_is_exynos4() (soc_is_exynos4210() || soc_is_exynos4212() || \
-			  soc_is_exynos4412())
-#define soc_is_exynos5() (soc_is_exynos5250() || soc_is_exynos5420())
 
 #define IODESC_ENT(x) { (unsigned long)S3C24XX_VA_##x, __phys_to_pfn(S3C24XX_PA_##x), S3C24XX_SZ_##x, MT_DEVICE }