diff options
Diffstat (limited to 'arch/arm/mach-omap2')
| -rw-r--r-- | arch/arm/mach-omap2/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/i2c.c | 56 |
2 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 6e348e528f8..e30e335dc2c 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -64,6 +64,9 @@ iommu-$(CONFIG_ARCH_OMAP3) += omap3-iommu.o obj-$(CONFIG_OMAP_IOMMU) += $(iommu-y) +i2c-omap-$(CONFIG_I2C_OMAP) := i2c.o +obj-y += $(i2c-omap-m) $(i2c-omap-y) + # Specific board support obj-$(CONFIG_MACH_OMAP_GENERIC) += board-generic.o obj-$(CONFIG_MACH_OMAP_H4) += board-h4.o diff --git a/arch/arm/mach-omap2/i2c.c b/arch/arm/mach-omap2/i2c.c new file mode 100644 index 00000000000..789ca8c02f0 --- /dev/null +++ b/arch/arm/mach-omap2/i2c.c @@ -0,0 +1,56 @@ +/* + * Helper module for board specific I2C bus registration + * + * Copyright (C) 2009 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <plat/cpu.h> +#include <plat/i2c.h> +#include <plat/mux.h> + +#include "mux.h" + +int __init omap_register_i2c_bus(int bus_id, u32 clkrate, + struct i2c_board_info const *info, + unsigned len) +{ + if (cpu_is_omap24xx()) { + const int omap24xx_pins[][2] = { + { M19_24XX_I2C1_SCL, L15_24XX_I2C1_SDA }, + { J15_24XX_I2C2_SCL, H19_24XX_I2C2_SDA }, + }; + int scl, sda; + + scl = omap24xx_pins[bus_id - 1][0]; + sda = omap24xx_pins[bus_id - 1][1]; + omap_cfg_reg(sda); + omap_cfg_reg(scl); + } + + /* First I2C bus is not muxable */ + if (cpu_is_omap34xx() && bus_id > 1) { + char mux_name[sizeof("i2c2_scl.i2c2_scl")]; + + sprintf(mux_name, "i2c%i_scl.i2c%i_scl", bus_id, bus_id); + omap_mux_init_signal(mux_name, OMAP_PIN_INPUT); + sprintf(mux_name, "i2c%i_sda.i2c%i_sda", bus_id, bus_id); + omap_mux_init_signal(mux_name, OMAP_PIN_INPUT); + } + + return omap_plat_register_i2c_bus(bus_id, clkrate, info, len); +} |