From c753ea31781aaab2dccc3e6f297cfde3c99f0ba1 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Wed, 4 Aug 2021 15:21:59 +0100 Subject: mfd: simple-mfd-i2c: Add support for registering devices via MFD cells More devices are cropping up requiring only Regmap initialisation and child registration functionality. We currently only support that if all required devices are represented by their own Device Tree nodes complete with compatible strings. However, not everyone is happy with adding empty nodes that provide no additional device information into the Device Tree. Rather than have a plethora of mostly empty, function-less drivers in MFD, we'll support those simple cases in here instead via MFD cells. Cc: Mark Brown Tested-by: Michael Walle Reviewed-by: Alistair Francis Tested-by: Alistair Francis Signed-off-by: Lee Jones --- drivers/mfd/simple-mfd-i2c.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 drivers/mfd/simple-mfd-i2c.h (limited to 'drivers/mfd/simple-mfd-i2c.h') diff --git a/drivers/mfd/simple-mfd-i2c.h b/drivers/mfd/simple-mfd-i2c.h new file mode 100644 index 000000000000..7cb2bdd347d9 --- /dev/null +++ b/drivers/mfd/simple-mfd-i2c.h @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Simple MFD - I2C + * + * Author: Lee Jones + * + * This driver creates a single register map with the intention for it to be + * shared by all sub-devices. Children can use their parent's device structure + * (dev.parent) in order to reference it. + * + * This driver creates a single register map with the intention for it to be + * shared by all sub-devices. Children can use their parent's device structure + * (dev.parent) in order to reference it. + * + * Once the register map has been successfully initialised, any sub-devices + * represented by child nodes in Device Tree or via the MFD cells in the + * associated C file will be subsequently registered. + */ + +#ifndef __MFD_SIMPLE_MFD_I2C_H +#define __MFD_SIMPLE_MFD_I2C_H + +#include +#include + +struct simple_mfd_data { + const struct regmap_config *regmap_config; + const struct mfd_cell *mfd_cell; + size_t mfd_cell_size; +}; + +#endif /* __MFD_SIMPLE_MFD_I2C_H */ -- cgit v1.2.3