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Merge branch 'next/devel-samsung-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc

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From Kukjin Kim:

This is including Samsung small updates(developments) for v3.8.

Add node PL330 MDMA1 and UART3 for DEBUG_LL and secondary cpu bring-up
for exynos4412.

* 'next/devel-samsung-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: dts: add node for PL330 MDMA1 controller for exynos4
  ARM: EXYNOS: Add support for secondary CPU bring-up on Exynos4412
  ARM: EXYNOS: add UART3 to DEBUG_LL ports

Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson 2012-11-30 09:31:49 -08:00
commit 79870b7bca
5 changed files with 43 additions and 6 deletions
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11
arch/arm/Kconfig.debug
View File

@ -338,6 +338,17 @@ choice
The uncompressor code port configuration is now handled
by CONFIG_S3C_LOWLEVEL_UART_PORT.
config DEBUG_S3C_UART3
depends on PLAT_SAMSUNG && ARCH_EXYNOS
bool "Use S3C UART 3 for low-level debug"
help
Say Y here if you want the debug print routines to direct
their output to UART 3. The port must have been initialised
by the boot-loader before use.
The uncompressor code port configuration is now handled
by CONFIG_S3C_LOWLEVEL_UART_PORT.
config DEBUG_SOCFPGA_UART
depends on ARCH_SOCFPGA
bool "Use SOCFPGA UART for low-level debug"

6
arch/arm/boot/dts/exynos4.dtsi
View File

@ -244,5 +244,11 @@
reg = <0x12690000 0x1000>;
interrupts = <0 36 0>;
};
mdma1: mdma@12850000 {
compatible = "arm,pl330", "arm,primecell";
reg = <0x12850000 0x1000>;
interrupts = <0 34 0>;
};
};
};

1
arch/arm/mach-exynos/mach-exynos4-dt.c
View File

@ -77,6 +77,7 @@ static const struct of_dev_auxdata exynos4_auxdata_lookup[] __initconst = {
"exynos4210-spi.2", NULL),
OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA0, "dma-pl330.0", NULL),
OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA1, "dma-pl330.1", NULL),
OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_MDMA1, "dma-pl330.2", NULL),
{},
};

30
arch/arm/mach-exynos/platsmp.c
View File

@ -36,8 +36,22 @@
extern void exynos4_secondary_startup(void);
#define CPU1_BOOT_REG (samsung_rev() == EXYNOS4210_REV_1_1 ? \
S5P_INFORM5 : S5P_VA_SYSRAM)
static inline void __iomem *cpu_boot_reg_base(void)
{
if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_1_1)
return S5P_INFORM5;
return S5P_VA_SYSRAM;
}
static inline void __iomem *cpu_boot_reg(int cpu)
{
void __iomem *boot_reg;
boot_reg = cpu_boot_reg_base();
if (soc_is_exynos4412())
boot_reg += 4*cpu;
return boot_reg;
}
/*
* Write pen_release in a way that is guaranteed to be visible to all
@ -84,6 +98,7 @@ static void __cpuinit exynos_secondary_init(unsigned int cpu)
static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
unsigned long timeout;
unsigned long phys_cpu = cpu_logical_map(cpu);
/*
* Set synchronisation state between this boot processor
@ -99,7 +114,7 @@ static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct
* Note that "pen_release" is the hardware CPU ID, whereas
* "cpu" is Linux's internal ID.
*/
write_pen_release(cpu_logical_map(cpu));
write_pen_release(phys_cpu);
if (!(__raw_readl(S5P_ARM_CORE1_STATUS) & S5P_CORE_LOCAL_PWR_EN)) {
__raw_writel(S5P_CORE_LOCAL_PWR_EN,
@ -133,7 +148,7 @@ static int __cpuinit exynos_boot_secondary(unsigned int cpu, struct task_struct
smp_rmb();
__raw_writel(virt_to_phys(exynos4_secondary_startup),
CPU1_BOOT_REG);
cpu_boot_reg(phys_cpu));
gic_raise_softirq(cpumask_of(cpu), 0);
if (pen_release == -1)
@ -181,6 +196,8 @@ static void __init exynos_smp_init_cpus(void)
static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
{
int i;
if (!soc_is_exynos5250())
scu_enable(scu_base_addr());
@ -190,8 +207,9 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
* until it receives a soft interrupt, and then the
* secondary CPU branches to this address.
*/
__raw_writel(virt_to_phys(exynos4_secondary_startup),
CPU1_BOOT_REG);
for (i = 1; i < max_cpus; ++i)
__raw_writel(virt_to_phys(exynos4_secondary_startup),
cpu_boot_reg(cpu_logical_map(i)));
}
struct smp_operations exynos_smp_ops __initdata = {

1
arch/arm/plat-samsung/Kconfig
View File

@ -507,5 +507,6 @@ config DEBUG_S3C_UART
default "0" if DEBUG_S3C_UART0
default "1" if DEBUG_S3C_UART1
default "2" if DEBUG_S3C_UART2
default "3" if DEBUG_S3C_UART3
endif