mirrors/u-boot
1
0
Fork 0
mirror of https://source.denx.de/u-boot/u-boot.git synced 2025-09-25 07:41:40 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge tag '20211220-fixes-for-2022.01' of https://source.denx.de/u-boot/custodians/u-boot-i2c

Browse Source 
i2c changes for 20211220-fixes-for-2022.01

- mvtwsi: Swab the register address if its size is > 1
This commit is contained in:
Tom Rini 2021-12-20 08:51:53 -05:00
commit 1cd75ceae5
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/i2c/mvtwsi.c
View File

@ -860,6 +860,9 @@ static int mvtwsi_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
{ {
struct mvtwsi_i2c_dev *dev = dev_get_priv(bus); struct mvtwsi_i2c_dev *dev = dev_get_priv(bus);
struct i2c_msg *dmsg, *omsg, dummy; struct i2c_msg *dmsg, *omsg, dummy;
u8 *addr_buf_ptr;
u8 addr_buf[4];
int i;
memset(&dummy, 0, sizeof(struct i2c_msg)); memset(&dummy, 0, sizeof(struct i2c_msg));
@ -873,12 +876,17 @@ static int mvtwsi_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
omsg = nmsgs == 1 ? &dummy : msg; omsg = nmsgs == 1 ? &dummy : msg;
dmsg = nmsgs == 1 ? msg : msg + 1; dmsg = nmsgs == 1 ? msg : msg + 1;
/* We need to swap the register address if its size is > 1 */
addr_buf_ptr = &addr_buf[0];
for (i = omsg->len; i > 0; i--)
*addr_buf_ptr++ = omsg->buf[i - 1];
if (dmsg->flags & I2C_M_RD) if (dmsg->flags & I2C_M_RD)
return __twsi_i2c_read(dev->base, dmsg->addr, omsg->buf, return __twsi_i2c_read(dev->base, dmsg->addr, addr_buf,
omsg->len, dmsg->buf, dmsg->len, omsg->len, dmsg->buf, dmsg->len,
dev->tick); dev->tick);
else else
return __twsi_i2c_write(dev->base, dmsg->addr, omsg->buf, return __twsi_i2c_write(dev->base, dmsg->addr, addr_buf,
omsg->len, dmsg->buf, dmsg->len, omsg->len, dmsg->buf, dmsg->len,
dev->tick); dev->tick);
} }