[U-Boot] [[PATCH v3 2/2] gpio: omap5-uevm: Configure the tca6424 gpio expander

[Dan Murphy]

On 07/10/2013 06:56 PM, Nishanth Menon wrote:
> On 07/10/2013 03:06 PM, Dan Murphy wrote:
>> Configure the tca6424 gpio expander
>> This allows use of the debug and tri color LEDs.
>>
>> Signed-off-by: Dan Murphy <dmurphy at ti.com>
>> ---
>>   board/ti/omap5_uevm/evm.c      |   21 +++++++++++++++++++++
>>   board/ti/omap5_uevm/mux_data.h |    2 ++
>>   include/configs/omap5_uevm.h   |    5 +++++
>>   3 files changed, 28 insertions(+)
>>
>> diff --git a/board/ti/omap5_uevm/evm.c b/board/ti/omap5_uevm/evm.c
>> index 90046e8..0e9a559 100644
>> --- a/board/ti/omap5_uevm/evm.c
>> +++ b/board/ti/omap5_uevm/evm.c
>> @@ -26,6 +26,7 @@
>>   #include <palmas.h>
>>   #include <asm/arch/sys_proto.h>
>>   #include <asm/arch/mmc_host_def.h>
>> +#include <tca642x.h>
>>
>>   #include "mux_data.h"
>>
>> @@ -35,6 +36,24 @@ const struct omap_sysinfo sysinfo = {
>>       "Board: OMAP5430 EVM\n"
>>   };
>>
>> +/* @brief tca642x_init - Initial states for the GPIO expander
> documentation style?
> /*
>  * @brief
> ?
>> + * input reg, output reg, polarity reg, configuration reg
>> + */
>> +struct tca642x_bank_info tca642x_init[] = {
>> +    { .input_reg = 0x00,
>> +      .output_reg = 0x04,
>> +      .polarity_reg = 0x00,
>> +      .configuration_reg = 0x80 },
>> +    { .input_reg = 0x00,
>> +      .output_reg = 0x00,
>> +      .polarity_reg = 0x00,
>> +      .configuration_reg = 0xff },
>> +    { .input_reg = 0x00,
>> +      .output_reg = 0x00,
>> +      .polarity_reg = 0x00,
>> +      .configuration_reg = 0x40 },
>> +};
>> +
>>   /**
>>    * @brief board_init
>>    *
>> @@ -46,6 +65,8 @@ int board_init(void)
>>       gd->bd->bi_arch_number = MACH_TYPE_OMAP5_SEVM;
>>       gd->bd->bi_boot_params = (0x80000000 + 0x100); /* boot param addr */
>>
>> +    tca642x_set_inital_state(CONFIG_SYS_I2C_TCA642X_ADDR, tca642x_init);
>> +
>>       return 0;
>>   }
>>
>> diff --git a/board/ti/omap5_uevm/mux_data.h b/board/ti/omap5_uevm/mux_data.h
>> index a82795d..7e6415e 100644
>> --- a/board/ti/omap5_uevm/mux_data.h
>> +++ b/board/ti/omap5_uevm/mux_data.h
>> @@ -56,6 +56,8 @@ const struct pad_conf_entry core_padconf_array_essential[] = {
>>       {USBD0_HS_DP, (IEN | M0)},    /*  USBD0_HS_DP */
>>       {USBD0_HS_DM, (IEN | M0)},    /*  USBD0_HS_DM */
>>       {USBD0_SS_RX, (IEN | M0)},    /*  USBD0_SS_RX */
>> +    {I2C5_SCL, (IEN | M0)}, /* I2C5_SCL */
> nit pick -> SCL (or i2c clk) is out put from master - always. IEN enables full duplex, but anyways.. just a nitpick :)
>
OK I changed this and did a test and reads fail without the IEN set.
This is to sync the client clocks.
>> +    {I2C5_SDA, (IEN | M0)}, /* I2C5_SDA */
>>
>>   };
>>
>> diff --git a/include/configs/omap5_uevm.h b/include/configs/omap5_uevm.h
>> index 46dacc2..bee1278 100644
>> --- a/include/configs/omap5_uevm.h
>> +++ b/include/configs/omap5_uevm.h
>> @@ -53,6 +53,11 @@
>>   #define CONFIG_PARTITION_UUIDS
>>   #define CONFIG_CMD_PART
>>
>> +#define CONFIG_TCA642X
>> +#define CONFIG_CMD_TCA642X
>> +#define CONFIG_SYS_I2C_TCA642X_BUS_NUM 4
>> +#define CONFIG_SYS_I2C_TCA642X_ADDR 0x22
>> +
>>   #define CONFIG_SYS_PROMPT        "OMAP5432 uEVM # "
>>
>>   #define CONSOLEDEV        "ttyO2"
>>
>
> Else,
> no further comments from me.
> -- 
> Regards,
> Nishanth Menon


-- 
------------------
Dan Murphy