[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-omap2 / i2c.c

/*
 * 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);
}
Commit	Line	Data
b63128e8 TL	1	/*
	2	* Helper module for board specific I2C bus registration
	3	*
	4	* Copyright (C) 2009 Nokia Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* version 2 as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	18	* 02110-1301 USA
	19	*
	20	*/
	21
	22	#include <plat/cpu.h>
	23	#include <plat/i2c.h>
	24	#include <plat/mux.h>
	25
	26	#include "mux.h"
	27
	28	int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
	29	struct i2c_board_info const *info,
	30	unsigned len)
	31	{
	32	if (cpu_is_omap24xx()) {
	33	const int omap24xx_pins[][2] = {
	34	{ M19_24XX_I2C1_SCL, L15_24XX_I2C1_SDA },
	35	{ J15_24XX_I2C2_SCL, H19_24XX_I2C2_SDA },
	36	};
	37	int scl, sda;
	38
	39	scl = omap24xx_pins[bus_id - 1][0];
	40	sda = omap24xx_pins[bus_id - 1][1];
	41	omap_cfg_reg(sda);
	42	omap_cfg_reg(scl);
	43	}
	44
	45	/* First I2C bus is not muxable */
	46	if (cpu_is_omap34xx() && bus_id > 1) {
	47	char mux_name[sizeof("i2c2_scl.i2c2_scl")];
	48
	49	sprintf(mux_name, "i2c%i_scl.i2c%i_scl", bus_id, bus_id);
	50	omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
	51	sprintf(mux_name, "i2c%i_sda.i2c%i_sda", bus_id, bus_id);
	52	omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
	53	}
	54
	55	return omap_plat_register_i2c_bus(bus_id, clkrate, info, len);
	56	}