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authorPeter Tyser <ptyser@xes-inc.com>2008-12-17 16:36:21 -0600
committerAndrew Fleming-AFLEMING <afleming@freescale.com>2008-12-19 18:11:49 -0600
commite92739d34e2d6b6aca93b2598248210710897ce8 (patch)
tree48e948a4280720cebc824335dab61f68558e13fc /README
parent7a8979591171676417ab36852d8811a8c46accd8 (diff)
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Add support for PCA953x I2C gpio devices
Initial support for NXP's 4 and 8 bit I2C gpio expanders (eg pca9537, pca9557, etc). The CONFIG_PCA953X define enables support for the devices while the CONFIG_CMD_PCA953X define enables the pca953x command. The CONFIG_CMD_PCA953X_INFO define enables an 'info' sub-command which provides summary information for the given pca953x device. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'README')
-rw-r--r--README9
1 files changed, 9 insertions, 0 deletions
diff --git a/README b/README
index 2a553c2..eb86eba 100644
--- a/README
+++ b/README
@@ -621,6 +621,8 @@ The following options need to be configured:
CONFIG_CMD_MII * MII utility commands
CONFIG_CMD_NAND * NAND support
CONFIG_CMD_NET bootp, tftpboot, rarpboot
+ CONFIG_CMD_PCA953X * PCA953x I2C gpio commands
+ CONFIG_CMD_PCA953X_INFO * PCA953x I2C gpio info command
CONFIG_CMD_PCI * pciinfo
CONFIG_CMD_PCMCIA * PCMCIA support
CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network
@@ -698,6 +700,13 @@ The following options need to be configured:
Note that if the RTC uses I2C, then the I2C interface
must also be configured. See I2C Support, below.
+- GPIO Support:
+ CONFIG_PCA953X - use NXP's PCA953X series I2C GPIO
+ CONFIG_PCA953X_INFO - enable pca953x info command
+
+ Note that if the GPIO device uses I2C, then the I2C interface
+ must also be configured. See I2C Support, below.
+
- Timestamp Support:
When CONFIG_TIMESTAMP is selected, the timestamp