On 20 February 2014 11:35, Sachin Kamat <sachin.kamat@xxxxxxxxxx> wrote: > Instead of hardcoding the SYSRAM details for each SoC, > pass this information through device tree (DT) and make > the code SoC agnostic. > > Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx> > --- > Based on top of my earlier patch > "ARM: EXYNOS: Consolidate CPU init code" at > http://comments.gmane.org/gmane.linux.kernel.samsung-soc/26560 > --- > .../devicetree/bindings/arm/samsung-boards.txt | 11 +++ > arch/arm/boot/dts/exynos4210-universal_c210.dts | 5 + > arch/arm/boot/dts/exynos4210.dtsi | 10 ++ > arch/arm/boot/dts/exynos4x12.dtsi | 10 ++ > arch/arm/boot/dts/exynos5.dtsi | 5 + > arch/arm/boot/dts/exynos5250.dtsi | 5 + > arch/arm/mach-exynos/common.c | 104 ++++++++------------ > arch/arm/mach-exynos/include/mach/map.h | 7 -- > 8 files changed, 86 insertions(+), 71 deletions(-) > > diff --git a/Documentation/devicetree/bindings/arm/samsung-boards.txt b/Documentation/devicetree/bindings/arm/samsung-boards.txt > index 2168ed31e1b0..f79710eb7e79 100644 > --- a/Documentation/devicetree/bindings/arm/samsung-boards.txt > +++ b/Documentation/devicetree/bindings/arm/samsung-boards.txt > @@ -7,6 +7,17 @@ Required root node properties: > (a) "samsung,smdkv310" - for Samsung's SMDKV310 eval board. > (b) "samsung,exynos4210" - for boards based on Exynos4210 SoC. > > + - sysram node, specifying the type (secure or non-secure) of SYSRAM > + - compatible: following types are supported > + "samsung,exynos4210-sysram" : Secure SYSRAM > + "samsung,exynos4210-sysram-ns" : Non-secure SYSRAM > + - reg: address of SYSRAM bank > + > + sysram@02020000 { > + compatible = "samsung,exynos4210-sysram"; > + reg = <0x02020000 0x1000>; > + }; > + > Optional: > - firmware node, specifying presence and type of secure firmware: > - compatible: only "samsung,secure-firmware" is currently supported > diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts > index d2e3f5f5916d..3ca3fb6aa5f4 100644 > --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts > +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts > @@ -28,6 +28,11 @@ > bootargs = "console=ttySAC2,115200N8 root=/dev/mmcblk0p5 rw rootwait earlyprintk panic=5 maxcpus=1"; > }; > > + sysram@02020000 { > + compatible = "samsung,exynos4210-sysram"; > + reg = <0x02025000 0x1000>; > + }; > + > mct@10050000 { > compatible = "none"; > }; > diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi > index 48ecd7a755ab..7f02c029ba68 100644 > --- a/arch/arm/boot/dts/exynos4210.dtsi > +++ b/arch/arm/boot/dts/exynos4210.dtsi > @@ -31,6 +31,16 @@ > pinctrl2 = &pinctrl_2; > }; > > + sysram@02020000 { > + compatible = "samsung,exynos4210-sysram"; > + reg = <0x02020000 0x1000>; > + }; > + > + sysram-ns@0203F000 { > + compatible = "samsung,exynos4210-sysram-ns"; > + reg = <0x0203F000 0x1000>; > + }; > + > pd_lcd1: lcd1-power-domain@10023CA0 { > compatible = "samsung,exynos4210-pd"; > reg = <0x10023CA0 0x20>; > diff --git a/arch/arm/boot/dts/exynos4x12.dtsi b/arch/arm/boot/dts/exynos4x12.dtsi > index 5c412aa14738..05006cab698b 100644 > --- a/arch/arm/boot/dts/exynos4x12.dtsi > +++ b/arch/arm/boot/dts/exynos4x12.dtsi > @@ -31,6 +31,16 @@ > mshc0 = &mshc_0; > }; > > + sysram@02020000 { > + compatible = "samsung,exynos4210-sysram"; > + reg = <0x02020000 0x1000>; > + }; > + > + sysram-ns@0204F000 { > + compatible = "samsung,exynos4210-sysram-ns"; > + reg = <0x0204F000 0x1000>; > + }; > + > pd_isp: isp-power-domain@10023CA0 { > compatible = "samsung,exynos4210-pd"; > reg = <0x10023CA0 0x20>; > diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi > index 258dca441f36..b70a54ec7157 100644 > --- a/arch/arm/boot/dts/exynos5.dtsi > +++ b/arch/arm/boot/dts/exynos5.dtsi > @@ -18,6 +18,11 @@ > / { > interrupt-parent = <&gic>; > > + sysram@02020000 { > + compatible = "samsung,exynos4210-sysram"; > + reg = <0x02020000 0x1000>; > + }; > + > chipid@10000000 { > compatible = "samsung,exynos4210-chipid"; > reg = <0x10000000 0x100>; > diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi > index b7dec41e32af..3ecdbd8e2b19 100644 > --- a/arch/arm/boot/dts/exynos5250.dtsi > +++ b/arch/arm/boot/dts/exynos5250.dtsi > @@ -70,6 +70,11 @@ > }; > }; > > + sysram-ns@0204F000 { > + compatible = "samsung,exynos4210-sysram-ns"; > + reg = <0x0204F000 0x1000>; > + }; > + > pd_gsc: gsc-power-domain@10044000 { > compatible = "samsung,exynos4210-pd"; > reg = <0x10044000 0x20>; > diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c > index 02d0aaa7af59..6a16f4659ec7 100644 > --- a/arch/arm/mach-exynos/common.c > +++ b/arch/arm/mach-exynos/common.c > @@ -131,51 +131,6 @@ static struct map_desc exynos4_iodesc[] __initdata = { > }, > }; > > -static struct map_desc exynos4_iodesc0[] __initdata = { > - { > - .virtual = (unsigned long)S5P_VA_SYSRAM, > - .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0), > - .length = SZ_4K, > - .type = MT_DEVICE, > - }, > -}; > - > -static struct map_desc exynos4_iodesc1[] __initdata = { > - { > - .virtual = (unsigned long)S5P_VA_SYSRAM, > - .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1), > - .length = SZ_4K, > - .type = MT_DEVICE, > - }, > -}; > - > -static struct map_desc exynos4210_iodesc[] __initdata = { > - { > - .virtual = (unsigned long)S5P_VA_SYSRAM_NS, > - .pfn = __phys_to_pfn(EXYNOS4210_PA_SYSRAM_NS), > - .length = SZ_4K, > - .type = MT_DEVICE, > - }, > -}; > - > -static struct map_desc exynos4x12_iodesc[] __initdata = { > - { > - .virtual = (unsigned long)S5P_VA_SYSRAM_NS, > - .pfn = __phys_to_pfn(EXYNOS4x12_PA_SYSRAM_NS), > - .length = SZ_4K, > - .type = MT_DEVICE, > - }, > -}; > - > -static struct map_desc exynos5250_iodesc[] __initdata = { > - { > - .virtual = (unsigned long)S5P_VA_SYSRAM_NS, > - .pfn = __phys_to_pfn(EXYNOS5250_PA_SYSRAM_NS), > - .length = SZ_4K, > - .type = MT_DEVICE, > - }, > -}; > - > static struct map_desc exynos5_iodesc[] __initdata = { > { > .virtual = (unsigned long)S3C_VA_SYS, > @@ -198,11 +153,6 @@ static struct map_desc exynos5_iodesc[] __initdata = { > .length = SZ_4K, > .type = MT_DEVICE, > }, { > - .virtual = (unsigned long)S5P_VA_SYSRAM, > - .pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM), > - .length = SZ_4K, > - .type = MT_DEVICE, > - }, { > .virtual = (unsigned long)S5P_VA_CMU, > .pfn = __phys_to_pfn(EXYNOS5_PA_CMU), > .length = 144 * SZ_1K, > @@ -292,6 +242,44 @@ static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname, > return 1; > } > > +struct __sysram_desc { > + char name[32]; > + unsigned long addr; > +}; > + > +static struct __sysram_desc sysram_desc[] __initdata = { > + { > + .name = "samsung,exynos4210-sysram", > + .addr = (unsigned long)S5P_VA_SYSRAM, > + }, { > + .name = "samsung,exynos4210-sysram-ns", > + .addr = (unsigned long)S5P_VA_SYSRAM_NS, > + }, > +}; > + > +static int __init exynos_fdt_map_sysram(unsigned long node, const char *uname, > + int depth, void *data) > +{ > + struct map_desc iodesc; > + __be32 *reg; > + unsigned long len; > + int i; > + > + for (i = 0; i < ARRAY_SIZE(sysram_desc); i++) { > + if (of_flat_dt_is_compatible(node, sysram_desc[i].name)) { > + reg = of_get_flat_dt_prop(node, "reg", &len); > + if (!reg || len != (sizeof(unsigned long) * 2)) > + return -ENODEV; > + iodesc.virtual = sysram_desc[i].addr; > + iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0])); > + iodesc.length = be32_to_cpu(reg[1]); > + iodesc.type = MT_DEVICE; > + iotable_init(&iodesc, 1); > + } > + } > + return 0; > +} > + > /* > * exynos_map_io > * > @@ -308,6 +296,8 @@ void __init exynos_init_io(void) > s5p_init_cpu(S5P_VA_CHIPID); > > exynos_map_io(); > + > + of_scan_flat_dt(exynos_fdt_map_sysram, NULL); > } > > static void __init exynos_map_io(void) > @@ -317,20 +307,6 @@ static void __init exynos_map_io(void) > > if (soc_is_exynos5250() || soc_is_exynos5420()) > iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc)); > - > - if (soc_is_exynos4210()) { > - if (samsung_rev() == EXYNOS4210_REV_0) > - iotable_init(exynos4_iodesc0, > - ARRAY_SIZE(exynos4_iodesc0)); > - else > - iotable_init(exynos4_iodesc1, > - ARRAY_SIZE(exynos4_iodesc1)); > - iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc)); > - } > - if (soc_is_exynos4212() || soc_is_exynos4412()) > - iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc)); > - if (soc_is_exynos5250()) > - iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc)); > } > > struct bus_type exynos_subsys = { > diff --git a/arch/arm/mach-exynos/include/mach/map.h b/arch/arm/mach-exynos/include/mach/map.h > index 7b046b59d9ec..548269a60634 100644 > --- a/arch/arm/mach-exynos/include/mach/map.h > +++ b/arch/arm/mach-exynos/include/mach/map.h > @@ -23,13 +23,6 @@ > > #include <plat/map-s5p.h> > > -#define EXYNOS4_PA_SYSRAM0 0x02025000 > -#define EXYNOS4_PA_SYSRAM1 0x02020000 > -#define EXYNOS5_PA_SYSRAM 0x02020000 > -#define EXYNOS4210_PA_SYSRAM_NS 0x0203F000 > -#define EXYNOS4x12_PA_SYSRAM_NS 0x0204F000 > -#define EXYNOS5250_PA_SYSRAM_NS 0x0204F000 > - > #define EXYNOS_PA_CHIPID 0x10000000 > > #define EXYNOS4_PA_SYSCON 0x10010000 > -- > 1.7.9.5 > ping.. -- With warm regards, Sachin -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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