diff options
Diffstat (limited to 'arch/arm/mach-u300/core.c')
| -rw-r--r-- | arch/arm/mach-u300/core.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c index 1fdaf81771fa..8cfca45d3650 100644 --- a/arch/arm/mach-u300/core.c +++ b/arch/arm/mach-u300/core.c @@ -14,6 +14,7 @@ #include <linux/platform_data/clk-u300.h> #include <linux/platform_data/pinctrl-coh901.h> #include <linux/irqchip.h> +#include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/clocksource.h> #include <linux/clk.h> @@ -48,6 +49,8 @@ #define U300_SYSCON_BCR_EXTRA_BOOT_OPTION_MASK (0x01FC) #define U300_SYSCON_BCR_APP_BOOT_SERV_MASK (0x0003) +static void __iomem *syscon_base; + /* * Static I/O mappings that are needed for booting the U300 platforms. The * only things we need are the areas where we find the timer, syscon and @@ -171,7 +174,7 @@ static void __init u300_init_check_chip(void) const char unknown[] = "UNKNOWN"; /* Read out and print chip ID */ - val = readw(U300_SYSCON_VBASE + U300_SYSCON_CIDR); + val = readw(syscon_base + U300_SYSCON_CIDR); /* This is in funky bigendian order... */ val = (val & 0xFFU) << 8 | (val >> 8); chip = db_chips; @@ -244,10 +247,21 @@ static struct of_dev_auxdata u300_auxdata_lookup[] __initdata = { static void __init u300_init_irq_dt(void) { + struct device_node *syscon; struct clk *clk; + syscon = of_find_node_by_path("/syscon@c0011000"); + if (!syscon) { + pr_crit("could not find syscon node\n"); + return; + } + syscon_base = of_iomap(syscon, 0); + if (!syscon_base) { + pr_crit("could not remap syscon\n"); + return; + } /* initialize clocking early, we want to clock the INTCON */ - u300_clk_init(U300_SYSCON_VBASE); + u300_clk_init(syscon_base); /* Bootstrap EMIF and SEMI clocks */ clk = clk_get_sys("pl172", NULL); @@ -280,9 +294,9 @@ static void __init u300_init_machine_dt(void) u300_auxdata_lookup, NULL); /* Enable SEMI self refresh */ - val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) | + val = readw(syscon_base + U300_SYSCON_SMCR) | U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE; - writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR); + writew(val, syscon_base + U300_SYSCON_SMCR); } static const char * u300_board_compat[] = { |