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path: root/drivers/i2c/busses/i2c-amd-mp2-plat.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-amd-mp2-plat.c')
-rw-r--r--drivers/i2c/busses/i2c-amd-mp2-plat.c27
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/i2c/busses/i2c-amd-mp2-plat.c b/drivers/i2c/busses/i2c-amd-mp2-plat.c
index f5b3f00c6559..17df9e8845b6 100644
--- a/drivers/i2c/busses/i2c-amd-mp2-plat.c
+++ b/drivers/i2c/busses/i2c-amd-mp2-plat.c
@@ -201,32 +201,37 @@ static int i2c_amd_resume(struct amd_i2c_common *i2c_common)
}
#endif
+static const u32 supported_speeds[] = {
+ I2C_MAX_HIGH_SPEED_MODE_FREQ,
+ I2C_MAX_TURBO_MODE_FREQ,
+ I2C_MAX_FAST_MODE_PLUS_FREQ,
+ I2C_MAX_FAST_MODE_FREQ,
+ I2C_MAX_STANDARD_MODE_FREQ,
+};
+
static enum speed_enum i2c_amd_get_bus_speed(struct platform_device *pdev)
{
u32 acpi_speed;
int i;
- static const u32 supported_speeds[] = {
- 0, 100000, 400000, 1000000, 1400000, 3400000
- };
acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev);
/* round down to the lowest standard speed */
- for (i = 1; i < ARRAY_SIZE(supported_speeds); i++) {
- if (acpi_speed < supported_speeds[i])
+ for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
+ if (acpi_speed >= supported_speeds[i])
break;
}
- acpi_speed = supported_speeds[i - 1];
+ acpi_speed = i < ARRAY_SIZE(supported_speeds) ? supported_speeds[i] : 0;
switch (acpi_speed) {
- case 100000:
+ case I2C_MAX_STANDARD_MODE_FREQ:
return speed100k;
- case 400000:
+ case I2C_MAX_FAST_MODE_FREQ:
return speed400k;
- case 1000000:
+ case I2C_MAX_FAST_MODE_PLUS_FREQ:
return speed1000k;
- case 1400000:
+ case I2C_MAX_TURBO_MODE_FREQ:
return speed1400k;
- case 3400000:
+ case I2C_MAX_HIGH_SPEED_MODE_FREQ:
return speed3400k;
default:
return speed400k;