diff options
author | wdenk <wdenk> | 2002-12-17 01:51:00 +0000 |
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committer | wdenk <wdenk> | 2002-12-17 01:51:00 +0000 |
commit | 6aff3115b90780933d390d2b471479179927468d (patch) | |
tree | ea9e54617d8a6f6b2d05d37c7f2bde24ce6dfb35 /post/i2c.c | |
parent | 228f29ac6e0026e596b3a6fbb640118b9944cdd8 (diff) | |
download | u-boot-imx-6aff3115b90780933d390d2b471479179927468d.zip u-boot-imx-6aff3115b90780933d390d2b471479179927468d.tar.gz u-boot-imx-6aff3115b90780933d390d2b471479179927468d.tar.bz2 |
* Use 1-byte-read instead of -write for iprobe() function
Add i2c commands to PM826 config
* extend I2C POST code: check for list on known addresses
Diffstat (limited to 'post/i2c.c')
-rw-r--r-- | post/i2c.c | 51 |
1 files changed, 45 insertions, 6 deletions
@@ -29,8 +29,13 @@ * I2C test * * For verifying the I2C bus, a full I2C bus scanning is performed. - * If any I2C device is found, the test is considered as passed, - * otherwise failed. + * + * #ifdef I2C_ADDR_LIST + * The test is considered as passed if all the devices and + * only the devices in the list are found. + * #else [ ! I2C_ADDR_LIST ] + * The test is considered as passed if any I2C device is found. + * #endif */ #include <post.h> @@ -41,14 +46,48 @@ int i2c_post_test (int flags) { unsigned int i; - unsigned int chips = 0; + unsigned int good = 0; +#ifdef I2C_ADDR_LIST + unsigned int bad = 0; + int j; + unsigned char i2c_addr_list[] = I2C_ADDR_LIST; + unsigned char i2c_miss_list[] = I2C_ADDR_LIST; +#endif for (i = 0; i < 128; i++) { - if (i2c_probe (i) == 0) - chips++; + if (i2c_probe (i) == 0) { +#ifndef I2C_ADDR_LIST + good++; +#else /* I2C_ADDR_LIST */ + for (j=0; j<sizeof(i2c_addr_list); ++j) { + if (i == i2c_addr_list[j]) { + good++; + i2c_miss_list[j] = 0xFF; + break; + } + } + if (j == sizeof(i2c_addr_list)) { + bad++; + post_log ("I2C: addr %02X not expected\n", + i); + } +#endif /* I2C_ADDR_LIST */ + } } - return chips > 0 ? 0 : -1; +#ifndef I2C_ADDR_LIST + return good > 0 ? 0 : -1; +#else /* I2C_ADDR_LIST */ + if (good != sizeof(i2c_addr_list)) { + for (j=0; j<sizeof(i2c_miss_list); ++j) { + if (i2c_miss_list[j] != 0xFF) { + post_log ("I2C: addr %02X did not respond\n", + i2c_miss_list[j]); + } + } + } + return ((good == sizeof(i2c_addr_list)) && (bad == 0)) ? 0 : -1; +#endif } #endif /* CONFIG_POST & CFG_POST_I2C */ |