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i2c: omap: Add support for setting mux

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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: Jayesh Choudhary <j-choudhary@ti.com>
Link: https://lore.kernel.org/r/20250318103622.29979-3-j-choudhary@ti.com
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
This commit is contained in:
Jayesh Choudhary 2025-03-18 16:06:22 +05:30 committed by Andi Shyti
parent 0fc829dbde
commit b6ef830c60
2 changed files with 23 additions and 0 deletions
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1
drivers/i2c/busses/Kconfig
View File

@ -940,6 +940,7 @@ config I2C_OMAP
tristate "OMAP I2C adapter" tristate "OMAP I2C adapter"
depends on ARCH_OMAP || ARCH_K3 || COMPILE_TEST depends on ARCH_OMAP || ARCH_K3 || COMPILE_TEST
default MACH_OMAP_OSK default MACH_OMAP_OSK
select MULTIPLEXER
help help
If you say yes to this option, support will be included for the If you say yes to this option, support will be included for the
I2C interface on the Texas Instruments OMAP1/2 family of processors. I2C interface on the Texas Instruments OMAP1/2 family of processors.

22
drivers/i2c/busses/i2c-omap.c
View File

@ -24,6 +24,7 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/mux/consumer.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/platform_data/i2c-omap.h> #include <linux/platform_data/i2c-omap.h>
@ -211,6 +212,7 @@ struct omap_i2c_dev {
u16 syscstate; u16 syscstate;
u16 westate; u16 westate;
u16 errata; u16 errata;
struct mux_state *mux_state;
}; };
static const u8 reg_map_ip_v1[] = { static const u8 reg_map_ip_v1[] = {
@ -1452,6 +1454,23 @@ omap_i2c_probe(struct platform_device *pdev)
(1000 * omap->speed / 8); (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 */ /* reset ASAP, clearing any IRQs */
omap_i2c_init(omap); omap_i2c_init(omap);
@ -1511,6 +1530,9 @@ static void omap_i2c_remove(struct platform_device *pdev)
i2c_del_adapter(&omap->adapter); i2c_del_adapter(&omap->adapter);
if (omap->mux_state)
mux_state_deselect(omap->mux_state);
ret = pm_runtime_get_sync(&pdev->dev); ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) if (ret < 0)
dev_err(omap->dev, "Failed to resume hardware, skip disable\n"); dev_err(omap->dev, "Failed to resume hardware, skip disable\n");