diff options
author | Tony Lindgren <tony@atomide.com> | 2009-12-12 03:16:32 +0300 |
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committer | Tony Lindgren <tony@atomide.com> | 2009-12-12 03:16:32 +0300 |
commit | b63128e81214cc2db2995d690438055c26d213a5 (patch) | |
tree | 9b319655d1456fd9f2b8a1a25b7b70047e6fb0ad /arch/arm/mach-omap2/i2c.c | |
parent | 4b715efccf9547c0d7fe864277526fee3d9b6bba (diff) | |
download | linux-b63128e81214cc2db2995d690438055c26d213a5.tar.xz |
omap: Split i2c platform init for mach-omap1 and mach-omap2
Otherwise we cannot limit new mux code to mach-omap2.
The same signal names should eventually work for other
omaps under mach-omap2.
Note that these pins don't need to be OMAP_PIN_INPUT_PULLUP,
just OMAP_PIN_INPUT is enough.
Cc: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/i2c.c')
-rw-r--r-- | arch/arm/mach-omap2/i2c.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/i2c.c b/arch/arm/mach-omap2/i2c.c new file mode 100644 index 000000000000..789ca8c02f0c --- /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); +} |