diff options
Diffstat (limited to 'recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch')
| -rw-r--r-- | recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch b/recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch new file mode 100644 index 0000000000..01d88548f5 --- /dev/null +++ b/recipes/u-boot/u-boot-git/0005-cmd_i2c.c-added-i2c-read-to-memory-function.patch @@ -0,0 +1,107 @@ +From cac3d6cd05cc89a4c1495f7198218ef2ae8088ec Mon Sep 17 00:00:00 2001 +From: Frans Meulenbroeks <fransmeulenbroeks@gmail.com> +Date: Thu, 25 Feb 2010 10:05:37 +0100 +Subject: [PATCH 5/5] cmd_i2c.c: added i2c read to memory function + +Signed-off-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com> +--- + common/cmd_i2c.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++- + 1 files changed, 60 insertions(+), 2 deletions(-) + +diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c +index b51e3f4..9e7143a 100644 +--- a/common/cmd_i2c.c ++++ b/common/cmd_i2c.c +@@ -154,6 +154,63 @@ int i2c_set_bus_speed(unsigned int) + */ + #define DISP_LINE_LEN 16 + ++/* ++ * Syntax: ++ * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr} ++ */ ++ ++int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) ++{ ++ u_char chip; ++ uint devaddr, alen, length; ++ u_char *memaddr; ++ int j; ++ ++ if (argc != 5) { ++ cmd_usage(cmdtp); ++ return 1; ++ } ++ ++ /* ++ * I2C chip address ++ */ ++ chip = simple_strtoul(argv[1], NULL, 16); ++ ++ /* ++ * I2C data address within the chip. This can be 1 or ++ * 2 bytes long. Some day it might be 3 bytes long :-). ++ */ ++ devaddr = simple_strtoul(argv[2], NULL, 16); ++ alen = 1; ++ for (j = 0; j < 8; j++) { ++ if (argv[2][j] == '.') { ++ alen = argv[2][j+1] - '0'; ++ if (alen > 3) { ++ cmd_usage(cmdtp); ++ return 1; ++ } ++ break; ++ } else if (argv[2][j] == '\0') ++ break; ++ } ++ ++ /* ++ * Length is the number of objects, not number of bytes. ++ */ ++ length = simple_strtoul(argv[3], NULL, 16); ++ ++ /* ++ * memaddr is the address where to store things in memory ++ */ ++ memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16); ++ ++ if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) { ++ puts ("Error reading the chip.\n"); ++ return 1; ++ } ++ return 0; ++} ++ + int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) + { + u_char chip; +@@ -1272,6 +1329,7 @@ static cmd_tbl_t cmd_i2c_sub[] = { + U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""), + U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""), + U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""), ++ U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""), + U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""), + #if defined(CONFIG_CMD_SDRAM) + U_BOOT_CMD_MKENT(sdram, 1, 1, do_i2c_sdram, "", ""), +@@ -1315,6 +1373,7 @@ U_BOOT_CMD( + "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n" + "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n" + "i2c probe - show devices on the I2C bus\n" ++ "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n" + "i2c reset - re-init the I2C Controller\n" + #if defined(CONFIG_CMD_SDRAM) + "i2c sdram chip - print SDRAM configuration information\n" +@@ -1322,8 +1381,7 @@ U_BOOT_CMD( + "i2c speed [speed] - show or set I2C bus speed" + ); + +-#if defined(CONFIG_I2C_MUX) +- ++#if defined(CONFIG_I2C_MUX) + int i2c_mux_add_device(I2C_MUX_DEVICE *dev) + { + I2C_MUX_DEVICE *devtmp = i2c_mux_devices; +-- +1.7.0 + |