Add support for reading the system clock and the TWSI clock
frequency from ACPI DSDT.
TWSI clock was already covered by using device_property_read().
Signed-off-by: Jan Glauber <jglauber@xxxxxxxxxx>
---
drivers/i2c/busses/i2c-thunderx-pcidrv.c | 24 +++++++++++++++---------
1 file changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/i2c/busses/i2c-thunderx-pcidrv.c b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
index bba5b42..031e59f 100644
--- a/drivers/i2c/busses/i2c-thunderx-pcidrv.c
+++ b/drivers/i2c/busses/i2c-thunderx-pcidrv.c
@@ -85,17 +85,23 @@ static void thunder_i2c_clock_enable(struct device *dev, struct octeon_i2c *i2c)
{
int ret;
- i2c->clk = clk_get(dev, NULL);
- if (IS_ERR(i2c->clk)) {
- i2c->clk = NULL;
- goto skip;
+ if (acpi_disabled) {
+ /* DT */
+ i2c->clk = clk_get(dev, NULL);
+ if (IS_ERR(i2c->clk)) {
+ i2c->clk = NULL;
+ goto skip;
+ }
+
+ ret = clk_prepare_enable(i2c->clk);
+ if (ret)
+ goto skip;
+ i2c->sys_freq = clk_get_rate(i2c->clk);
+ } else {
+ /* ACPI */
+ device_property_read_u32(dev, "sclk", &i2c->sys_freq);
}
- ret = clk_prepare_enable(i2c->clk);
- if (ret)
- goto skip;
- i2c->sys_freq = clk_get_rate(i2c->clk);
-
skip:
if (!i2c->sys_freq)
i2c->sys_freq = SYS_FREQ_DEFAULT;
--
2.9.0.rc0.21.g7777322
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