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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-24 22:55:06 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-24 22:55:06 +0300 |
| commit | 0823baef164686c98d084b16877f271681e2377f (patch) | |
| tree | 9dc8c71a91340bb11d354854ffb6f554b99f6731 /drivers | |
| parent | bca1d4de3981335754f04b557b84b75b9705b6bf (diff) | |
| parent | 4a8ac5e45cdaa88884b4ce05303e304cbabeb367 (diff) | |
| download | linux-0823baef164686c98d084b16877f271681e2377f.tar.xz | |
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
"Two bugfixes for the I2C subsystem"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: mpc: Poll for MCF
misc: eeprom: at24: Always append device id even if label property is set.
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/busses/i2c-mpc.c | 4 | ||||
| -rw-r--r-- | drivers/misc/eeprom/at24.c | 17 |
2 files changed, 9 insertions, 12 deletions
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c index 6d5014ebaab5..a6ea1eb1394e 100644 --- a/drivers/i2c/busses/i2c-mpc.c +++ b/drivers/i2c/busses/i2c-mpc.c @@ -635,8 +635,8 @@ static irqreturn_t mpc_i2c_isr(int irq, void *dev_id) status = readb(i2c->base + MPC_I2C_SR); if (status & CSR_MIF) { - /* Read again to allow register to stabilise */ - status = readb(i2c->base + MPC_I2C_SR); + /* Wait up to 100us for transfer to properly complete */ + readb_poll_timeout(i2c->base + MPC_I2C_SR, status, !(status & CSR_MCF), 0, 100); writeb(0, i2c->base + MPC_I2C_SR); mpc_i2c_do_intr(i2c, status); return IRQ_HANDLED; diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c index 7a6f01ace78a..305ffad131a2 100644 --- a/drivers/misc/eeprom/at24.c +++ b/drivers/misc/eeprom/at24.c @@ -714,23 +714,20 @@ static int at24_probe(struct i2c_client *client) } /* - * If the 'label' property is not present for the AT24 EEPROM, - * then nvmem_config.id is initialised to NVMEM_DEVID_AUTO, - * and this will append the 'devid' to the name of the NVMEM - * device. This is purely legacy and the AT24 driver has always - * defaulted to this. However, if the 'label' property is - * present then this means that the name is specified by the - * firmware and this name should be used verbatim and so it is - * not necessary to append the 'devid'. + * We initialize nvmem_config.id to NVMEM_DEVID_AUTO even if the + * label property is set as some platform can have multiple eeproms + * with same label and we can not register each of those with same + * label. Failing to register those eeproms trigger cascade failure + * on such platform. */ + nvmem_config.id = NVMEM_DEVID_AUTO; + if (device_property_present(dev, "label")) { - nvmem_config.id = NVMEM_DEVID_NONE; err = device_property_read_string(dev, "label", &nvmem_config.name); if (err) return err; } else { - nvmem_config.id = NVMEM_DEVID_AUTO; nvmem_config.name = dev_name(dev); } |