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mfd: cs5535: Add, assign and expose the software node for the GPIO cell

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There are board files in-tree that want to request GPIOs from this chip.
They currently rely on the GPIO core's mechanism of matching software
nodes' labels against GPIO controller names. We want to remove this
behavior from the kernel and to this end, we need to associate the
referenced GPIO controller with its target software node.

Create a dedicated GPIO software node for cs5535, assign it to the GPIO
cell and expose its address in a new header.

We only expose a single software node instance but that's alright: all
existing hardware only contains a single cs5535 companion and the geode
board file for which we expose this is legacy anyway.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260429-cs5535-swnode-v1-1-2bc5e17ddcf9@oss.qualcomm.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Bartosz Golaszewski 2026-04-29 14:23:30 +02:00 committed by Lee Jones
parent ade13e2b7b
commit 4b51f0da73
2 changed files with 17 additions and 0 deletions
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9
drivers/mfd/cs5535-mfd.c
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@ -12,8 +12,11 @@
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/cs5535.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/property.h>
#include <asm/olpc.h>
#define DRV_NAME "cs5535-mfd"
@ -29,6 +32,11 @@ enum cs5535_mfd_bars {
static struct resource cs5535_mfd_resources[NR_BARS];
const struct software_node cs5535_gpio_swnode = {
.name = "cs5535-gpio",
};
EXPORT_SYMBOL_NS(cs5535_gpio_swnode, "CS5535");
static struct mfd_cell cs5535_mfd_cells[] = {
{
.name = "cs5535-smb",
@ -39,6 +47,7 @@ static struct mfd_cell cs5535_mfd_cells[] = {
.name = "cs5535-gpio",
.num_resources = 1,
.resources = &cs5535_mfd_resources[GPIO_BAR],
.swnode = &cs5535_gpio_swnode,
},
{
.name = "cs5535-mfgpt",

8
include/linux/mfd/cs5535.h Normal file
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@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __MFD_CS5535_H__
#define __MFD_CS5535_H__
extern const struct software_node cs5535_gpio_swnode;
#endif /* __MFD_CS5535_H__ */