Hi,
Thanks a lot Wolfram for the hint. I have added the mapping configs:
#if defined (CONFIG_I2C_PCA_PLATFORM) || defined(CONFIG_I2C_ALGOPCA)
static struct resource i2c_resources[] = {
[0] = {
.start = AT91_CHIPSELECT_2, /* 0x30000000 */
.end = AT91_CHIPSELECT_2 + SZ_16K - 1,
.flags = IORESOURCE_MEM | IORESOURCE_MEM_8BIT,
},
[1] = {
.start = AT91RM9200_ID_IRQ0,
.end = AT91RM9200_ID_IRQ0,
.flags = IORESOURCE_IRQ,
},
};
static struct i2c_pca9564_pf_platform_data pca9665_platform_data = {
.gpio = AT91_PIN_PB27,
.i2c_clock_speed= 400000,
.timeout = HZ, /* timeout in jiffies */
};
static struct platform_device pca9665_twi_device = {
.name = "i2c-pca-platform",
.id = -1,
.dev = {
.platform_data = &pca9665_platform_data,
},
.num_resources = ARRAY_SIZE(i2c_resources),
.resource = i2c_resources,
};
static struct i2c_board_info __initdata ek_i2c_devices[] = {
{
I2C_BOARD_INFO("lm75", 0x48),
},
{
I2C_BOARD_INFO("pcf8523", 0x68),
},
};
void __init at91_add_device_i2c_pca(struct i2c_board_info *devices,
int nr_devices)
{
at91_set_A_periph(AT91_PIN_PB29, 1); /* IRQ0 interrupt pin */
/* Initialization of the Static Memory Controller for Chip Select 2 */
at91_ramc_write(0, AT91_SMC_CSR(2), AT91_SMC_ACSS_STD
| AT91_SMC_DBW_8 /* 8 bit */
| AT91_SMC_WSEN /* Wait State Enable */
);
i2c_register_board_info(0, devices, nr_devices);
platform_device_register(&pca9665_twi_device);
}
#endif
And now the correct controller is detected:
# dmesg | grep PCA
PCA9564/PCA9665 at 0x30000000: PCA9665 detected.
PCA9564/PCA9665 at 0x30000000: Clock frequency is 400000Hz
PCA9564/PCA9665 at 0x30000000 registered.
The i2c devices are also detected:
# i2cdetect -y 0
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
Best regards,
Elyas
On Fri, Jun 28, 2013 at 1:45 PM, Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote:
>> static struct resource i2c_resources[] = {
>> [0] = {
>> .start = AT91_CHIPSELECT_2, /* 0x30000000 */
>> .end = AT91_CHIPSELECT_2 + SZ_16K - 1,
>> .flags = IORESOURCE_MEM,
>
> Unless reading 0x30000000 does not return something like 0xf8, you have
> a problem with mapping in the register range. Make sure the, 8 bit bus
> width works.
>
> Regards,
>
> Wolfram
>
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