This EEPROM is found on the expansion boards available for the 10036
module. Since we won't need to do anything fancy except reading/writing
from it, use bitbanging to communicate with it.
This EEPROM will hold mostly the board_id so that we can determine if
there is an expansion board plugged in and what expansion board it is.
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
arch/arm/boards/crystalfontz-cfa10036/cfa10036.c | 23 ++++++++++++++++++++++
arch/arm/configs/cfa10036_defconfig | 3 ++-
arch/arm/mach-mxs/Kconfig | 3 +++
3 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
index 522d2d7..df0ead9 100644
--- a/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
+++ b/arch/arm/boards/crystalfontz-cfa10036/cfa10036.c
@@ -26,6 +26,10 @@
#include <net.h>
#include <sizes.h>
+#include <i2c/i2c.h>
+#include <i2c/i2c-gpio.h>
+#include <i2c/at24.h>
+
#include <mach/clock.h>
#include <mach/imx-regs.h>
#include <mach/iomux-imx28.h>
@@ -58,6 +62,10 @@ static const uint32_t cfa10036_pads[] = {
SSP0_SCK | VE_3_3V | BITKEEPER(0),
/* MCI slot power control 1 = off */
PWM3_GPIO | VE_3_3V | GPIO_OUT | GPIO_VALUE(0),
+
+ /* i2c0 */
+ AUART0_TX_GPIO | VE_3_3V | PULLUP(1),
+ AUART0_RX_GPIO | VE_3_3V | PULLUP(1),
};
static struct mxs_mci_platform_data mci_pdata = {
@@ -67,6 +75,18 @@ static struct mxs_mci_platform_data mci_pdata = {
.f_max = 25000000,
};
+static struct i2c_board_info cfa10036_i2c_devices[] = {
+ {
+ I2C_BOARD_INFO("24c02", 0x50)
+ },
+};
+
+static struct i2c_gpio_platform_data i2c_gpio_pdata = {
+ .sda_pin = 3 * 32 + 1,
+ .scl_pin = 3 * 32 + 0,
+ .udelay = 5, /* ~100 kHz */
+};
+
static int cfa10036_mem_init(void)
{
arm_add_mem_device("ram0", IMX_MEMORY_BASE, 128 * 1024 * 1024);
@@ -97,6 +117,9 @@ static int cfa10036_devices_init(void)
add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, SZ_8K,
IORESOURCE_MEM, NULL);
+ i2c_register_board_info(0, cfa10036_i2c_devices, ARRAY_SIZE(cfa10036_i2c_devices));
+ add_generic_device_res("i2c-gpio", 0, NULL, 0, &i2c_gpio_pdata);
+
return 0;
}
device_initcall(cfa10036_devices_init);
diff --git a/arch/arm/configs/cfa10036_defconfig b/arch/arm/configs/cfa10036_defconfig
index 67a0e8f..c55d50d 100644
--- a/arch/arm/configs/cfa10036_defconfig
+++ b/arch/arm/configs/cfa10036_defconfig
@@ -11,7 +11,7 @@ CONFIG_LONGHELP=y
CONFIG_HUSH_FANCY_PROMPT=y
CONFIG_CMDLINE_EDITING=y
CONFIG_AUTO_COMPLETE=y
-CONFIG_MENU=y
+CONFIG_CONSOLE_ACTIVATE_ALL=y
CONFIG_DEFAULT_ENVIRONMENT_GENERIC_NEW=y
CONFIG_DEFAULT_ENVIRONMENT_PATH="arch/arm/boards/crystalfontz-cfa10036/env"
CONFIG_DEBUG_INFO=y
@@ -35,6 +35,7 @@ CONFIG_CMD_TIMEOUT=y
CONFIG_CMD_PARTITION=y
CONFIG_CMD_GPIO=y
# CONFIG_SPI is not set
+CONFIG_I2C=y
CONFIG_MCI=y
CONFIG_MCI_STARTUP=y
CONFIG_MCI_MXS=y
diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index ff295f1..4e7e750 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -77,6 +77,9 @@ config MACH_MX28EVK
config MACH_CFA10036
bool "cfa-10036"
select HAVE_DEFAULT_ENVIRONMENT_NEW
+ select MXS_OCOTP
+ select I2C_GPIO
+ select EEPROM_AT24
help
Say Y here if you are using the Crystalfontz CFA-10036 module
--
1.7.9.5
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