diff options
Diffstat (limited to 'arch/arm/mach-exynos/mach-exynos5-dt.c')
| -rw-r--r-- | arch/arm/mach-exynos/mach-exynos5-dt.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c index db035374087e..f906f599a141 100644 --- a/arch/arm/mach-exynos/mach-exynos5-dt.c +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c @@ -11,10 +11,12 @@ #include <linux/of_platform.h> #include <linux/serial_core.h> +#include <linux/io.h> #include <asm/mach/arch.h> #include <asm/hardware/gic.h> #include <mach/map.h> +#include <mach/regs-pmu.h> #include <plat/cpu.h> #include <plat/regs-serial.h> @@ -91,6 +93,28 @@ static void __init exynos5250_dt_map_io(void) static void __init exynos5250_dt_machine_init(void) { + struct device_node *i2c_np; + const char *i2c_compat = "samsung,s3c2440-i2c"; + unsigned int tmp; + + /* + * Exynos5's legacy i2c controller and new high speed i2c + * controller have muxed interrupt sources. By default the + * interrupts for 4-channel HS-I2C controller are enabled. + * If node for first four channels of legacy i2c controller + * are available then re-configure the interrupts via the + * system register. + */ + for_each_compatible_node(i2c_np, NULL, i2c_compat) { + if (of_device_is_available(i2c_np)) { + if (of_alias_get_id(i2c_np, "i2c") < 4) { + tmp = readl(EXYNOS5_SYS_I2C_CFG); + writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")), + EXYNOS5_SYS_I2C_CFG); + } + } + } + of_platform_populate(NULL, of_default_bus_match_table, exynos5250_auxdata_lookup, NULL); } |