From 682c6c2188f39d13548ccdc89c9888fbcb547889 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Thu, 13 Jul 2017 15:45:02 +0200 Subject: [PATCH] i2c: designware: Some broken DSTDs use 1MiHz instead of 1MHz At least the Acer Iconia Tab8 / aka W1-810 uses 1MiHz instead of 1MHz for one of its busses, fix this up to 1MHz instead of failing the probe of that bus. This fixes the accelerometer on the Acer Iconia Tab8 not working. Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede Reviewed-by: Andy Shevchenko Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-designware-platdrv.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index d139b156f9c9..143a8fd582b4 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -298,6 +298,9 @@ static int dw_i2c_plat_probe(struct platform_device *pdev) } acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev); + /* Some broken DSTDs use 1MiHz instead of 1MHz */ + if (acpi_speed == 1048576) + acpi_speed = 1000000; /* * Find bus speed from the "clock-frequency" device property, ACPI * or by using fast mode if neither is set. -- 2.20.1