We have a number of drivers that reference the string "i2c_designware" towards two goals: - ensure their device gets bound to the i2c_designware platform_driver - create a clock lookup reference that matches the i2c_designware instance number for the i2c-designware-platdrv.c driver to be able to lookup the input reference clock Since this string is copied in a bunch of different places and since it is possible to get this named wrong (see [1] and [2]) with unintended consequences, create a header file that hosts that define for other drivers to use and all agree on the correct name to use. Link: https://lore.kernel.org/all/20240422084109.3201-1-duanqiangwen@xxxxxxxxxxxxx/ [1] Link: https://lore.kernel.org/all/20240422084109.3201-2-duanqiangwen@xxxxxxxxxxxxx/ [2] Signed-off-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx> --- MAINTAINERS | 1 + drivers/i2c/busses/i2c-designware-platdrv.c | 4 +++- include/linux/platform_data/i2c-designware.h | 12 ++++++++++++ 3 files changed, 16 insertions(+), 1 deletion(-) create mode 100644 include/linux/platform_data/i2c-designware.h diff --git a/MAINTAINERS b/MAINTAINERS index 2d5acd6d98c4..da1b39df2b94 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -21438,6 +21438,7 @@ R: Jan Dabros <jsd@xxxxxxxxxxxx> L: linux-i2c@xxxxxxxxxxxxxxx S: Supported F: drivers/i2c/busses/i2c-designware-* +F: include/linux/platform_data/i2c-designware.h SYNOPSYS DESIGNWARE MMC/SD/SDIO DRIVER M: Jaehoon Chung <jh80.chung@xxxxxxxxxxx> diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 0be7b0dc849b..107945d0337e 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -33,6 +33,8 @@ #include <linux/suspend.h> #include <linux/units.h> +#include <linux/platform_data/i2c-designware.h> + #include "i2c-designware-core.h" static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) @@ -489,7 +491,7 @@ static struct platform_driver dw_i2c_driver = { .probe = dw_i2c_plat_probe, .remove_new = dw_i2c_plat_remove, .driver = { - .name = "i2c_designware", + .name = I2C_DESIGNWARE_NAME, .of_match_table = of_match_ptr(dw_i2c_of_match), .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), .pm = pm_ptr(&dw_i2c_dev_pm_ops), diff --git a/include/linux/platform_data/i2c-designware.h b/include/linux/platform_data/i2c-designware.h new file mode 100644 index 000000000000..1196103df4f5 --- /dev/null +++ b/include/linux/platform_data/i2c-designware.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __I2C_DESIGNWARE_PDATA_H__ +#define __I2C_DESIGNWARE_PDATA_H__ + +/* + * This is the i2c-designware-platdrv.c platform driver name. This name is used + * to bind the device to the driver as well as by the driver itself to request + * the input reference clock. + */ +#define I2C_DESIGNWARE_NAME "i2c_designware" + +#endif /* __I2C_DESIGNWARE_PDATA_H__ */ -- 2.34.1
