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Commit 346e400c authored by Jan Glauber's avatar Jan Glauber Committed by Wolfram Sang
Browse files

i2c: thunderx: ACPI support for clock settings 



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: default avatarJan Glauber <jglauber@cavium.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 4165bd4b

drivers/i2c/busses/i2c-thunderx-pcidrv.c

+15 −9
Original line number Diff line number Diff line
@@ -85,6 +85,8 @@ static void thunder_i2c_clock_enable(struct device *dev, struct octeon_i2c *i2c) 
{

	int ret;



	if (acpi_disabled) {

		/* DT */

		i2c->clk = clk_get(dev, NULL);

		if (IS_ERR(i2c->clk)) {

			i2c->clk = NULL;
@@ -95,6 +97,10 @@ static void thunder_i2c_clock_enable(struct device *dev, struct octeon_i2c *i2c) 
		if (ret)

			goto skip;

		i2c->sys_freq = clk_get_rate(i2c->clk);

	} else {

		/* ACPI */

		device_property_read_u32(dev, "sclk", &i2c->sys_freq);

	}



skip:

	if (!i2c->sys_freq)