[3/4] ARM: EXYNOS: Remove static mapping of SCU SFR
Alim Akhtar
alim.akhtar at samsung.com
Fri Nov 4 06:26:39 PDT 2016
Hi Pankaj,
On 11/04/2016 09:09 AM, Pankaj Dubey wrote:
> Lets remove static mapping of SCU SFR mainly used in CORTEX-A9 SoC based boards.
> Instead use mapping from device tree node of SCU.
>
> Signed-off-by: Pankaj Dubey <pankaj.dubey at samsung.com>
> ---
> arch/arm/mach-exynos/exynos.c | 22 ----------------------
> arch/arm/mach-exynos/include/mach/map.h | 2 --
> arch/arm/mach-exynos/platsmp.c | 18 +++++++++++-------
> arch/arm/mach-exynos/pm.c | 14 +++++++++++---
> arch/arm/mach-exynos/suspend.c | 15 +++++++++++----
> arch/arm/plat-samsung/include/plat/map-s5p.h | 4 ----
> 6 files changed, 33 insertions(+), 42 deletions(-)
>
> diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
> index 757fc11..fa08ef9 100644
> --- a/arch/arm/mach-exynos/exynos.c
> +++ b/arch/arm/mach-exynos/exynos.c
> @@ -28,15 +28,6 @@
>
> #include "common.h"
>
> -static struct map_desc exynos4_iodesc[] __initdata = {
> - {
> - .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
> - .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
> - .length = SZ_8K,
> - .type = MT_DEVICE,
> - },
> -};
> -
> static struct platform_device exynos_cpuidle = {
> .name = "exynos_cpuidle",
> #ifdef CONFIG_ARM_EXYNOS_CPUIDLE
> @@ -99,17 +90,6 @@ static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
> return 1;
> }
>
> -/*
> - * 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));
> -}
> -
> static void __init exynos_init_io(void)
> {
> debug_ll_io_init();
> @@ -118,8 +98,6 @@ static void __init exynos_init_io(void)
>
> /* detect cpu id and rev. */
> s5p_init_cpu(S5P_VA_CHIPID);
> -
> - exynos_map_io();
> }
>
> /*
> diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h
> index 5fb0040..0eef407 100644
> --- a/arch/arm/mach-exynos/include/mach/map.h
> +++ b/arch/arm/mach-exynos/include/mach/map.h
> @@ -18,6 +18,4 @@
>
> #define EXYNOS_PA_CHIPID 0x10000000
>
> -#define EXYNOS4_PA_COREPERI 0x10500000
> -
> #endif /* __ASM_ARCH_MAP_H */
> diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
> index a5d6841..553d0d9 100644
> --- a/arch/arm/mach-exynos/platsmp.c
> +++ b/arch/arm/mach-exynos/platsmp.c
> @@ -224,11 +224,6 @@ static void write_pen_release(int val)
> sync_cache_w(&pen_release);
> }
>
> -static void __iomem *scu_base_addr(void)
> -{
> - return (void __iomem *)(S5P_VA_SCU);
> -}
> -
> static DEFINE_SPINLOCK(boot_lock);
>
> static void exynos_secondary_init(unsigned int cpu)
> @@ -387,14 +382,23 @@ fail:
>
> static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
> {
> + struct device_node *np;
> + void __iomem *scu_base;
> int i;
>
> exynos_sysram_init();
>
> exynos_set_delayed_reset_assertion(true);
>
> - if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9)
> - scu_enable(scu_base_addr());
> + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) {
> + np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
what if of_find_compatible_node() fails? May be add a error check for
the same?
> + scu_base = of_iomap(np, 0);
> + if (scu_base) {
> + scu_enable(scu_base);
> + iounmap(scu_base);
> + }
> + of_node_put(np);
> + }
>
> /*
> * Write the address of secondary startup into the
> diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
> index 487295f..60e6827 100644
> --- a/arch/arm/mach-exynos/pm.c
> +++ b/arch/arm/mach-exynos/pm.c
> @@ -18,6 +18,7 @@
> #include <linux/cpu_pm.h>
> #include <linux/io.h>
> #include <linux/of.h>
> +#include <linux/of_address.h>
> #include <linux/soc/samsung/exynos-regs-pmu.h>
> #include <linux/soc/samsung/exynos-pmu.h>
>
> @@ -26,8 +27,6 @@
> #include <asm/suspend.h>
> #include <asm/cacheflush.h>
>
> -#include <mach/map.h>
> -
> #include "common.h"
>
> static inline void __iomem *exynos_boot_vector_addr(void)
> @@ -158,6 +157,8 @@ static int exynos_aftr_finisher(unsigned long flags)
>
> void exynos_enter_aftr(void)
> {
> + struct device_node *np;
> + void __iomem *scu_base;
> unsigned int cpuid = smp_processor_id();
>
> cpu_pm_enter();
> @@ -177,7 +178,14 @@ void exynos_enter_aftr(void)
> cpu_suspend(0, exynos_aftr_finisher);
>
> if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) {
> - scu_enable(S5P_VA_SCU);
> + np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
same as above
> + scu_base = of_iomap(np, 0);
> + if (scu_base) {
> + scu_enable(scu_base);
> + iounmap(scu_base);
> + }
> + of_node_put(np);
> +
> if (call_firmware_op(resume) == -ENOSYS)
> exynos_cpu_restore_register();
> }
> diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
> index 06332f6..7ab7e67 100644
> --- a/arch/arm/mach-exynos/suspend.c
> +++ b/arch/arm/mach-exynos/suspend.c
> @@ -34,8 +34,6 @@
> #include <asm/smp_scu.h>
> #include <asm/suspend.h>
>
> -#include <mach/map.h>
> -
> #include <plat/pm-common.h>
>
> #include "common.h"
> @@ -453,6 +451,8 @@ static void exynos_pm_release_retention(void)
>
> static void exynos_pm_resume(void)
> {
> + struct device_node *np;
> + void __iomem *scu_base;
> u32 cpuid = read_cpuid_part();
>
> if (exynos_pm_central_resume())
> @@ -461,8 +461,15 @@ static void exynos_pm_resume(void)
> /* For release retention */
> exynos_pm_release_retention();
>
> - if (cpuid == ARM_CPU_PART_CORTEX_A9)
> - scu_enable(S5P_VA_SCU);
> + if (cpuid == ARM_CPU_PART_CORTEX_A9) {
> + np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
and here otherwise patch looks good.
> + scu_base = of_iomap(np, 0);
> + if (scu_base) {
> + scu_enable(scu_base);
> + iounmap(scu_base);
> + }
> + of_node_put(np);
> + }
>
> if (call_firmware_op(resume) == -ENOSYS
> && cpuid == ARM_CPU_PART_CORTEX_A9)
> diff --git a/arch/arm/plat-samsung/include/plat/map-s5p.h b/arch/arm/plat-samsung/include/plat/map-s5p.h
> index 0fe2828..512ed1f 100644
> --- a/arch/arm/plat-samsung/include/plat/map-s5p.h
> +++ b/arch/arm/plat-samsung/include/plat/map-s5p.h
> @@ -15,10 +15,6 @@
>
> #define S5P_VA_CHIPID S3C_ADDR(0x02000000)
>
> -#define S5P_VA_COREPERI_BASE S3C_ADDR(0x02800000)
> -#define S5P_VA_COREPERI(x) (S5P_VA_COREPERI_BASE + (x))
> -#define S5P_VA_SCU S5P_VA_COREPERI(0x0)
> -
> #define VA_VIC(x) (S3C_VA_IRQ + ((x) * 0x10000))
> #define VA_VIC0 VA_VIC(0)
> #define VA_VIC1 VA_VIC(1)
>
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