Commit b6ef830c authored by Jayesh Choudhary's avatar Jayesh Choudhary Committed by Andi Shyti
Browse files

i2c: omap: Add support for setting mux 



Some SoCs require muxes in the routing for SDA and SCL lines.
Therefore, add support for setting the mux by reading the mux-states
property from the dt-node.

Signed-off-by: default avatarJayesh Choudhary <j-choudhary@ti.com>
Link: https://lore.kernel.org/r/20250318103622.29979-3-j-choudhary@ti.com


Signed-off-by: default avatarAndi Shyti <andi.shyti@kernel.org>
parent 0fc829db

drivers/i2c/busses/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -940,6 +940,7 @@ config I2C_OMAP 
	tristate "OMAP I2C adapter"

	depends on ARCH_OMAP || ARCH_K3 || COMPILE_TEST

	default MACH_OMAP_OSK

	select MULTIPLEXER

	help

	  If you say yes to this option, support will be included for the

	  I2C interface on the Texas Instruments OMAP1/2 family of processors.

drivers/i2c/busses/i2c-omap.c

+22 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/io.h>

#include <linux/mux/consumer.h>

#include <linux/of.h>

#include <linux/slab.h>

#include <linux/platform_data/i2c-omap.h>
@@ -211,6 +212,7 @@ struct omap_i2c_dev { 
	u16			syscstate;

	u16			westate;

	u16			errata;

	struct mux_state	*mux_state;

};



static const u8 reg_map_ip_v1[] = {
@@ -1452,6 +1454,23 @@ omap_i2c_probe(struct platform_device *pdev) 
				       (1000 * omap->speed / 8);

	}



	if (of_property_read_bool(node, "mux-states")) {

		struct mux_state *mux_state;



		mux_state = devm_mux_state_get(&pdev->dev, NULL);

		if (IS_ERR(mux_state)) {

			r = PTR_ERR(mux_state);

			dev_dbg(&pdev->dev, "failed to get I2C mux: %d\n", r);

			goto err_disable_pm;

		}

		omap->mux_state = mux_state;

		r = mux_state_select(omap->mux_state);

		if (r) {

			dev_err(&pdev->dev, "failed to select I2C mux: %d\n", r);

			goto err_disable_pm;

		}

	}



	/* reset ASAP, clearing any IRQs */

	omap_i2c_init(omap);
@@ -1511,6 +1530,9 @@ static void omap_i2c_remove(struct platform_device *pdev) 


	i2c_del_adapter(&omap->adapter);



	if (omap->mux_state)

		mux_state_deselect(omap->mux_state);



	ret = pm_runtime_get_sync(&pdev->dev);

	if (ret < 0)

		dev_err(omap->dev, "Failed to resume hardware, skip disable\n");