Messages in this thread Patch in this message | | | From | Jan Glauber <> | Subject | [PATCH] i2c: thunderx: ACPI support for clock settings | Date | Thu, 2 Mar 2017 11:34:07 +0100 |
| |
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@cavium.com> --- 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
| |