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arm: mx6: cm_fx6: add i2c support

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Add support for all 3 I2C busses on Compulab CM-FX6 CoM.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
master
Nikita Kiryanov 10 years ago committed by Stefano Babic
parent 0f3effb99f
commit f42b2f6061
2 changed files with 53 additions and 0 deletions
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  1. 42
      board/compulab/cm_fx6/cm_fx6.c
  2. 11
      include/configs/cm_fx6.h

42
board/compulab/cm_fx6/cm_fx6.c
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@ -16,12 +16,53 @@
#include <asm/arch/crm_regs.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/iomux.h>
#include <asm/imx-common/mxc_i2c.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include "common.h"
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_SYS_I2C_MXC
#define I2C_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
PAD_CTL_DSE_40ohm | PAD_CTL_HYS | \
PAD_CTL_ODE | PAD_CTL_SRE_FAST)
I2C_PADS(i2c0_pads,
PAD_EIM_D21__I2C1_SCL | MUX_PAD_CTRL(I2C_PAD_CTRL),
PAD_EIM_D21__GPIO3_IO21 | MUX_PAD_CTRL(I2C_PAD_CTRL),
IMX_GPIO_NR(3, 21),
PAD_EIM_D28__I2C1_SDA | MUX_PAD_CTRL(I2C_PAD_CTRL),
PAD_EIM_D28__GPIO3_IO28 | MUX_PAD_CTRL(I2C_PAD_CTRL),
IMX_GPIO_NR(3, 28));
I2C_PADS(i2c1_pads,
PAD_KEY_COL3__I2C2_SCL | MUX_PAD_CTRL(I2C_PAD_CTRL),
PAD_KEY_COL3__GPIO4_IO12 | MUX_PAD_CTRL(I2C_PAD_CTRL),
IMX_GPIO_NR(4, 12),
PAD_KEY_ROW3__I2C2_SDA | MUX_PAD_CTRL(I2C_PAD_CTRL),
PAD_KEY_ROW3__GPIO4_IO13 | MUX_PAD_CTRL(I2C_PAD_CTRL),
IMX_GPIO_NR(4, 13));
I2C_PADS(i2c2_pads,
PAD_GPIO_3__I2C3_SCL | MUX_PAD_CTRL(I2C_PAD_CTRL),
PAD_GPIO_3__GPIO1_IO03 | MUX_PAD_CTRL(I2C_PAD_CTRL),
IMX_GPIO_NR(1, 3),
PAD_GPIO_6__I2C3_SDA | MUX_PAD_CTRL(I2C_PAD_CTRL),
PAD_GPIO_6__GPIO1_IO06 | MUX_PAD_CTRL(I2C_PAD_CTRL),
IMX_GPIO_NR(1, 6));
static void cm_fx6_setup_i2c(void)
{
setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, I2C_PADS_INFO(i2c0_pads));
setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, I2C_PADS_INFO(i2c1_pads));
setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, I2C_PADS_INFO(i2c2_pads));
}
#else
static void cm_fx6_setup_i2c(void) { }
#endif
#ifdef CONFIG_USB_EHCI_MX6
#define WEAK_PULLDOWN (PAD_CTL_PUS_100K_DOWN | \
PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
@ -259,6 +300,7 @@ int board_init(void)
{
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
cm_fx6_setup_gpmi_nand();
cm_fx6_setup_i2c();
return 0;
}

11
include/configs/cm_fx6.h
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@ -210,6 +210,17 @@
#define CONFIG_USB_MAX_CONTROLLER_COUNT 2
#define CONFIG_EHCI_HCD_INIT_AFTER_RESET /* For OTG port */
/* I2C */
#define CONFIG_CMD_I2C
#define CONFIG_SYS_I2C
#define CONFIG_SYS_I2C_MXC
#define CONFIG_SYS_I2C_SPEED 100000
#define CONFIG_SYS_MXC_I2C3_SPEED 400000
#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
#define CONFIG_SYS_I2C_EEPROM_BUS 2
/* GPIO */
#define CONFIG_MXC_GPIO

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