diff options
Diffstat (limited to 'arch/arm/mach-shmobile/setup-r8a7790.c')
| -rw-r--r-- | arch/arm/mach-shmobile/setup-r8a7790.c | 106 |
1 files changed, 100 insertions, 6 deletions
diff --git a/arch/arm/mach-shmobile/setup-r8a7790.c b/arch/arm/mach-shmobile/setup-r8a7790.c index b7e78b9a7fdf..4c96dad21195 100644 --- a/arch/arm/mach-shmobile/setup-r8a7790.c +++ b/arch/arm/mach-shmobile/setup-r8a7790.c @@ -21,9 +21,10 @@ #include <linux/irq.h> #include <linux/kernel.h> #include <linux/of_platform.h> -#include <linux/serial_sci.h> #include <linux/platform_data/gpio-rcar.h> #include <linux/platform_data/irq-renesas-irqc.h> +#include <linux/serial_sci.h> +#include <linux/sh_timer.h> #include <mach/common.h> #include <mach/irqs.h> #include <mach/r8a7790.h> @@ -148,6 +149,36 @@ static struct resource irqc0_resources[] __initdata = { &irqc##idx##_data, \ sizeof(struct renesas_irqc_config)) +static struct resource thermal_resources[] __initdata = { + DEFINE_RES_MEM(0xe61f0000, 0x14), + DEFINE_RES_MEM(0xe61f0100, 0x38), + DEFINE_RES_IRQ(gic_spi(69)), +}; + +#define r8a7790_register_thermal() \ + platform_device_register_simple("rcar_thermal", -1, \ + thermal_resources, \ + ARRAY_SIZE(thermal_resources)) + +static struct sh_timer_config cmt00_platform_data = { + .name = "CMT00", + .timer_bit = 0, + .clockevent_rating = 80, +}; + +static struct resource cmt00_resources[] = { + DEFINE_RES_MEM(0xffca0510, 0x0c), + DEFINE_RES_MEM(0xffca0500, 0x04), + DEFINE_RES_IRQ(gic_spi(142)), /* CMT0_0 */ +}; + +#define r8a7790_register_cmt(idx) \ + platform_device_register_resndata(&platform_bus, "sh_cmt", \ + idx, cmt##idx##_resources, \ + ARRAY_SIZE(cmt##idx##_resources), \ + &cmt##idx##_platform_data, \ + sizeof(struct sh_timer_config)) + void __init r8a7790_add_standard_devices(void) { r8a7790_register_scif(SCIFA0); @@ -161,20 +192,82 @@ void __init r8a7790_add_standard_devices(void) r8a7790_register_scif(HSCIF0); r8a7790_register_scif(HSCIF1); r8a7790_register_irqc(0); + r8a7790_register_thermal(); + r8a7790_register_cmt(00); } +#define MODEMR 0xe6160060 + +u32 __init r8a7790_read_mode_pins(void) +{ + void __iomem *modemr = ioremap_nocache(MODEMR, 4); + u32 mode; + + BUG_ON(!modemr); + mode = ioread32(modemr); + iounmap(modemr); + + return mode; +} + +#define CNTCR 0 +#define CNTFID0 0x20 + void __init r8a7790_timer_init(void) { - void __iomem *cntcr; +#ifdef CONFIG_ARM_ARCH_TIMER + u32 mode = r8a7790_read_mode_pins(); + void __iomem *base; + int extal_mhz = 0; + u32 freq; + + /* At Linux boot time the r8a7790 arch timer comes up + * with the counter disabled. Moreover, it may also report + * a potentially incorrect fixed 13 MHz frequency. To be + * correct these registers need to be updated to use the + * frequency EXTAL / 2 which can be determined by the MD pins. + */ + + switch (mode & (MD(14) | MD(13))) { + case 0: + extal_mhz = 15; + break; + case MD(13): + extal_mhz = 20; + break; + case MD(14): + extal_mhz = 26; + break; + case MD(13) | MD(14): + extal_mhz = 30; + break; + } - /* make sure arch timer is started by setting bit 0 of CNTCT */ - cntcr = ioremap(0xe6080000, PAGE_SIZE); - iowrite32(1, cntcr); - iounmap(cntcr); + /* The arch timer frequency equals EXTAL / 2 */ + freq = extal_mhz * (1000000 / 2); + + /* Remap "armgcnt address map" space */ + base = ioremap(0xe6080000, PAGE_SIZE); + + /* Update registers with correct frequency */ + iowrite32(freq, base + CNTFID0); + asm volatile("mcr p15, 0, %0, c14, c0, 0" : : "r" (freq)); + + /* make sure arch timer is started by setting bit 0 of CNTCR */ + iowrite32(1, base + CNTCR); + iounmap(base); +#endif /* CONFIG_ARM_ARCH_TIMER */ shmobile_timer_init(); } +void __init r8a7790_init_delay(void) +{ +#ifndef CONFIG_ARM_ARCH_TIMER + shmobile_setup_delay(1300, 2, 4); /* Cortex-A15 @ 1300MHz */ +#endif +} + #ifdef CONFIG_USE_OF static const char *r8a7790_boards_compat_dt[] __initdata = { @@ -183,6 +276,7 @@ static const char *r8a7790_boards_compat_dt[] __initdata = { }; DT_MACHINE_START(R8A7790_DT, "Generic R8A7790 (Flattened Device Tree)") + .init_early = r8a7790_init_delay, .init_time = r8a7790_timer_init, .dt_compat = r8a7790_boards_compat_dt, MACHINE_END |