Commit ab89a343 authored by Robert Hancock's avatar Robert Hancock Committed by Stephen Boyd
Browse files

clk: si5341: Add silabs,xaxb-ext-clk property 



Add a property to allow specifying that the device XA/XB pins are used for
an external clock input rather than for a clock crystal.

Signed-off-by: default avatarRobert Hancock <robert.hancock@calian.com>
Link: https://lore.kernel.org/r/20210325192643.2190069-8-robert.hancock@calian.com


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent b7bbf6ec

drivers/clk/clk-si5341.c

+7 −2
Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ struct clk_si5341 { 
	u8 num_outputs;

	u8 num_synth;

	u16 chip_id;

	bool xaxb_ext_clk;

};

#define to_clk_si5341(_hw)	container_of(_hw, struct clk_si5341, hw)
@@ -529,9 +530,11 @@ static int si5341_clk_reparent(struct clk_si5341 *data, u8 index) 
		if (err < 0)

			return err;



		/* Power up XTAL oscillator and buffer */

		/* Power up XTAL oscillator and buffer, select clock mode */

		err = regmap_update_bits(data->regmap, SI5341_XAXB_CFG,

				SI5341_XAXB_CFG_PDNB, SI5341_XAXB_CFG_PDNB);

				SI5341_XAXB_CFG_PDNB | SI5341_XAXB_CFG_EXTCLK_EN,

				SI5341_XAXB_CFG_PDNB | (data->xaxb_ext_clk ?

					SI5341_XAXB_CFG_EXTCLK_EN : 0));

		if (err < 0)

			return err;

	}
@@ -1539,6 +1542,8 @@ static int si5341_probe(struct i2c_client *client, 


		initialization_required = !err;

	}

	data->xaxb_ext_clk = of_property_read_bool(client->dev.of_node,

						   "silabs,xaxb-ext-clk");



	if (initialization_required) {

		/* Populate the regmap cache in preparation for "cache only" */