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Merge "i2c: i2c-msm-geni: Do i2c transfer if GENI IOS in proper state"

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qctecmdr 2021-09-21 09:42:13 -07:00 • committed by Gerrit - the friendly Code Review server
commit 6f420e10da
1 changed files with 12 additions and 0 deletions
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12
drivers/i2c/busses/i2c-msm-geni.c
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@ -243,6 +243,8 @@ err_ret:
static int geni_i2c_prepare(struct geni_i2c_dev *gi2c)
{
u32 geni_ios = 0;
if (gi2c->se_mode == UNINITIALIZED) {
int proto = get_se_proto(gi2c->base);
u32 se_mode;
@ -254,6 +256,16 @@ static int geni_i2c_prepare(struct geni_i2c_dev *gi2c)
return -ENXIO;
}
geni_ios = geni_read_reg_nolog(gi2c->base, SE_GENI_IOS);
if ((geni_ios & 0x3) != 0x3) { //SCL:b'1, SDA:b'0
GENI_SE_DBG(gi2c->ipcl, true, gi2c->dev,
"IO lines not in good state, Check power to slave\n");
if (!gi2c->is_le_vm)
se_geni_resources_off(&gi2c->i2c_rsc);
return -ENXIO;
}
se_mode = readl_relaxed(gi2c->base +
GENI_IF_FIFO_DISABLE_RO);
if (se_mode) {