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i2c-host fixes for v6.12-rc7

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In designware an incorrect behavior has been fixes when
 concluding a transmission.
 
 Fixed return error value evaluation in the Mule multiplexer.
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Merge tag 'i2c-host-fixes-6.12-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux into i2c/for-current

i2c-host fixes for v6.12-rc7

In designware an incorrect behavior has been fixes when
concluding a transmission.

Fixed return error value evaluation in the Mule multiplexer.
This commit is contained in:
Wolfram Sang 2024-11-09 23:47:51 +01:00
commit 547aad93e0
3 changed files with 7 additions and 4 deletions
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6
drivers/i2c/busses/i2c-designware-common.c
View File

@ -524,7 +524,7 @@ err_release_lock:
void __i2c_dw_disable(struct dw_i2c_dev *dev)
{
struct i2c_timings *t = &dev->timings;
unsigned int raw_intr_stats;
unsigned int raw_intr_stats, ic_stats;
unsigned int enable;
int timeout = 100;
bool abort_needed;
@ -532,9 +532,11 @@ void __i2c_dw_disable(struct dw_i2c_dev *dev)
int ret;
regmap_read(dev->map, DW_IC_RAW_INTR_STAT, &raw_intr_stats);
regmap_read(dev->map, DW_IC_STATUS, &ic_stats);
regmap_read(dev->map, DW_IC_ENABLE, &enable);
abort_needed = raw_intr_stats & DW_IC_INTR_MST_ON_HOLD;
abort_needed = (raw_intr_stats & DW_IC_INTR_MST_ON_HOLD) ||
(ic_stats & DW_IC_STATUS_MASTER_HOLD_TX_FIFO_EMPTY);
if (abort_needed) {
if (!(enable & DW_IC_ENABLE_ENABLE)) {
regmap_write(dev->map, DW_IC_ENABLE, DW_IC_ENABLE_ENABLE);

1
drivers/i2c/busses/i2c-designware-core.h
View File

@ -116,6 +116,7 @@
#define DW_IC_STATUS_RFNE BIT(3)
#define DW_IC_STATUS_MASTER_ACTIVITY BIT(5)
#define DW_IC_STATUS_SLAVE_ACTIVITY BIT(6)
#define DW_IC_STATUS_MASTER_HOLD_TX_FIFO_EMPTY BIT(7)
#define DW_IC_SDA_HOLD_RX_SHIFT 16
#define DW_IC_SDA_HOLD_RX_MASK GENMASK(23, 16)

4
drivers/i2c/muxes/i2c-mux-mule.c
View File

@ -66,8 +66,8 @@ static int mule_i2c_mux_probe(struct platform_device *pdev)
priv = i2c_mux_priv(muxc);
priv->regmap = dev_get_regmap(mux_dev->parent, NULL);
if (IS_ERR(priv->regmap))
return dev_err_probe(mux_dev, PTR_ERR(priv->regmap),
if (!priv->regmap)
return dev_err_probe(mux_dev, -ENODEV,
"No parent i2c register map\n");
platform_set_drvdata(pdev, muxc);