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authorShaveta Leekha <shaveta@freescale.com>2014-04-24 14:51:23 +0530
committerHeiko Schocher <hs@denx.de>2014-04-29 07:10:58 +0200
commita405764c1ec835a41ccda943b9156aee25e15d5e (patch)
tree9a54a9bd16b888e3c6f95f30090afbb36133868e /drivers/usb
parentdec1861be90c948ea9fb771927d3d26a994d2e20 (diff)
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drivers/i2c/fsl_i2c: modify i2c_read to handle multi-byte write
Most of the I2C slaves support accesses in the typical style that is : read/write series of bytes at particular address offset. These transactions look like:" (1) START:Address:Tx:Offset:RESTART:Address[0..4]:Tx/Rx:data[0..n]:STOP" However there are certain devices which support accesses in terms of the transactions as follows: (2) "START:Address:Tx:Txdata[0..n1]:Clock_stretching: RESTART:Address:Rx:data[0..n2]" Here Txdata is typically a command and some associated data, similarly Rxdata could be command status plus some data received as a response to the command sent. Type (1) transactions are currently supportd in the i2c driver using i2c_read and i2c_write APIs. I2C EEPROMs, RTC, etc fall in this category. To handle type (2) along with type (1) transactions, i2c_read() function has been modified. Signed-off-by: Shaveta Leekha <shaveta@freescale.com> Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Diffstat (limited to 'drivers/usb')
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