diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-platdrv.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 0b6f6dc671a8..a597ba32de7e 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -95,7 +95,10 @@ static void dw_i2c_acpi_params(struct platform_device *pdev, char method[], static int dw_i2c_acpi_configure(struct platform_device *pdev) { struct dw_i2c_dev *dev = platform_get_drvdata(pdev); + acpi_handle handle = ACPI_HANDLE(&pdev->dev); const struct acpi_device_id *id; + struct acpi_device *adev; + const char *uid; dev->adapter.nr = -1; dev->tx_fifo_depth = 32; @@ -115,6 +118,18 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev) if (id && id->driver_data) dev->flags |= (u32)id->driver_data; + if (acpi_bus_get_device(handle, &adev)) + return -ENODEV; + + /* + * Cherrytrail I2C7 gets used for the PMIC which gets accessed + * through ACPI opregions during late suspend / early resume + * disable pm for it. + */ + uid = adev->pnp.unique_id; + if ((dev->flags & MODEL_CHERRYTRAIL) && !strcmp(uid, "7")) + dev->pm_disabled = true; + return 0; } |