[U-Boot] [PATCH 16/18] arm: mx6: cm_fx6: add i2c support

Nikita Kiryanov
2014-08-03T07:34:46Z

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>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
---
board/compulab/cm_fx6/cm_fx6.c | 42 ++++++++++++++++++++++++++++++++++++++++++
include/configs/cm_fx6.h | 11 +++++++++++
2 files changed, 53 insertions(+)

diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index f8b3ad8..194b2ed 100644
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -15,12 +15,53 @@
#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 | \
@@ -245,6 +286,7 @@ int board_init(void)
{
gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
cm_fx6_setup_gpmi_nand();
+ cm_fx6_setup_i2c();

return 0;
}
diff --git a/include/configs/cm_fx6.h b/include/configs/cm_fx6.h
index 7ad2eb9..fd0210e 100644
--- a/include/configs/cm_fx6.h
+++ b/include/configs/cm_fx6.h
@@ -214,6 +214,17 @@
#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

--
1.9.1