mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
- Set 'struct device' fwnode when registering a new device - New Drivers - Add support for ROHM BD70528 PMIC - New Device Support - Add support for LP87561 4-Phase Regulator to TI LP87565 PMIC - Add support for RK809 and RK817 to Rockchip RK808 - Add support for Lid Angle to ChromeOS core - Add support for CS47L15 CODEC to Madera core - Add support for CS47L92 CODEC to Madera core - Add support for ChromeOS (legacy) Accelerometers in ChromeOS core - Add support for Add Intel Elkhart Lake PCH to Intel LPSS - New Functionality - Provide regulator supply information when registering; madera-core - Additional Device Tree support; lp87565, madera, cros-ec, rohm,bd71837-pmic - Allow over-riding power button press via Device Tree; rohm-bd718x7 - Differentiate between running processors; cros_ec_dev - Fix-ups - Big header file update; cros_ec_commands.h - Split header per-subsystem; rohm-bd718x7 - Remove superfluous code; menelaus, cs5535-mfd, cs47lXX-tables - Trivial; sorting, coding style; intel-lpss-pci - Only remove Power Off functionality if set locally; rk808 - Make use for Power Off Prepare(); rk808 - Fix spelling mistake in header guards; stmfx - Properly free IDA resources - SPDX fixups; cs47lXX-tables, madera - Error path fixups; hi655x-pmic - Bug Fixes - Add missing break in case() statement - Repair undefined behaviour when not initialising variables; arizona-core, madera-core - Fix reference to Device Tree documentation; madera -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEdrbJNaO+IJqU8IdIUa+KL4f8d2EFAl0sLxgACgkQUa+KL4f8 d2E25Q/9HmDJIdfyDQg0xv5IM5HS1WsP9BcJCEgoRIsad4mMDRYt+ZeLbslwMhue E9tsFH359gGvyqR+7d6hPpEUET1UEcJy4eRD1zAc0+epllQTDHSy8oHt1dtH+8xB 2AU5rvAKOqBk83D+V2Hkx2KcroWEQQNYIoR9/12Pi3xmEB1uaCO0/Ajd3B28bIBM Tzi3cVQ3U7jY9EIM44GVTsjDAbMSkQR0iab6cQF0vJAWaUmGKlsO7iRrU1XkN69V qXyBauI8WGiGssihrE8r+jYvHvmg7hA9OKZIckUaMXD/k7kpHbwIaFRh7gukq4Re Q6Cy30NfVJ1tY66/5oqN6gj5znfeuEudMCCzYAkzlROSp5eApe2Ke5ajYn3kOCZd ZKcsrw9Fiox1lKmuWXDbyf0nqf4zwdDPAnShRWaaF5aipwgywyGcwSigVtK4F0P5 Hjc5RLv7GjTAJq+ZzwgKyAdtx8L0mhdLd1ZTQpEXk/g/E9dW4GF72hWj9TQ/9BnA ZflKv8aP3lDGRHgO3Huwi4lMzskB8BVCQMCFwLwGs5cY1oZQhAjTdJzBZjTGexhC evuuA8OUsCrOWMvnZf3saSdHJ1iMHtfPnqEGHRJQtNj4fFaXv80LasIomvvfJc1/ 9JlRyAgm2pF7YDrgTh65ZzBb324eKSZZoAj9XZbnTyzxUAcF69A= =A3jw -----END PGP SIGNATURE----- Merge tag 'mfd-next-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD updates from Lee Jones: "Core Frameworks: - Set 'struct device' fwnode when registering a new device New Drivers: - Add support for ROHM BD70528 PMIC New Device Support: - Add support for LP87561 4-Phase Regulator to TI LP87565 PMIC - Add support for RK809 and RK817 to Rockchip RK808 - Add support for Lid Angle to ChromeOS core - Add support for CS47L15 CODEC to Madera core - Add support for CS47L92 CODEC to Madera core - Add support for ChromeOS (legacy) Accelerometers in ChromeOS core - Add support for Add Intel Elkhart Lake PCH to Intel LPSS New Functionality: - Provide regulator supply information when registering; madera-core - Additional Device Tree support; lp87565, madera, cros-ec, rohm,bd71837-pmic - Allow over-riding power button press via Device Tree; rohm-bd718x7 - Differentiate between running processors; cros_ec_dev Fix-ups: - Big header file update; cros_ec_commands.h - Split header per-subsystem; rohm-bd718x7 - Remove superfluous code; menelaus, cs5535-mfd, cs47lXX-tables - Trivial; sorting, coding style; intel-lpss-pci - Only remove Power Off functionality if set locally; rk808 - Make use for Power Off Prepare(); rk808 - Fix spelling mistake in header guards; stmfx - Properly free IDA resources - SPDX fixups; cs47lXX-tables, madera - Error path fixups; hi655x-pmic Bug Fixes: - Add missing break in case() statement - Repair undefined behaviour when not initialising variables; arizona-core, madera-core - Fix reference to Device Tree documentation; madera" * tag 'mfd-next-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (45 commits) mfd: hi655x-pmic: Fix missing return value check for devm_regmap_init_mmio_clk mfd: madera: Fixup SPDX headers mfd: madera: Remove some unused registers and fix some defaults mfd: intel-lpss: Release IDA resources mfd: intel-lpss: Add Intel Elkhart Lake PCH PCI IDs mfd: cs5535-mfd: Remove ifdef OLPC noise mfd: stmfx: Fix macro definition spelling dt-bindings: mfd: Add link to ROHM BD71847 Datasheet MAINAINERS: Swap words in INTEL PMIC MULTIFUNCTION DEVICE DRIVERS mfd: cros_ec_dev: Register cros_ec_accel_legacy driver as a subdevice mfd: rk808: Prepare rk805 for poweroff mfd: rk808: Check pm_power_off pointer mfd: cros_ec: differentiate SCP from EC by feature bit dt-bindings: Add binding for cros-ec-rpmsg mfd: madera: Add Madera core support for CS47L92 mfd: madera: Add Madera core support for CS47L15 mfd: madera: Update DT bindings to add additional CODECs mfd: madera: Add supply mapping for MICVDD mfd: madera: Fix potential uninitialised use of variable mfd: madera: Fix bad reference to pinctrl.txt file ...
419 lines
10 KiB
C
419 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* drivers/mfd/mfd-core.c
|
|
*
|
|
* core MFD support
|
|
* Copyright (c) 2006 Ian Molton
|
|
* Copyright (c) 2007,2008 Dmitry Baryshkov
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/property.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
static struct device_type mfd_dev_type = {
|
|
.name = "mfd_device",
|
|
};
|
|
|
|
int mfd_cell_enable(struct platform_device *pdev)
|
|
{
|
|
const struct mfd_cell *cell = mfd_get_cell(pdev);
|
|
int err = 0;
|
|
|
|
/* only call enable hook if the cell wasn't previously enabled */
|
|
if (atomic_inc_return(cell->usage_count) == 1)
|
|
err = cell->enable(pdev);
|
|
|
|
/* if the enable hook failed, decrement counter to allow retries */
|
|
if (err)
|
|
atomic_dec(cell->usage_count);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(mfd_cell_enable);
|
|
|
|
int mfd_cell_disable(struct platform_device *pdev)
|
|
{
|
|
const struct mfd_cell *cell = mfd_get_cell(pdev);
|
|
int err = 0;
|
|
|
|
/* only disable if no other clients are using it */
|
|
if (atomic_dec_return(cell->usage_count) == 0)
|
|
err = cell->disable(pdev);
|
|
|
|
/* if the disable hook failed, increment to allow retries */
|
|
if (err)
|
|
atomic_inc(cell->usage_count);
|
|
|
|
/* sanity check; did someone call disable too many times? */
|
|
WARN_ON(atomic_read(cell->usage_count) < 0);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(mfd_cell_disable);
|
|
|
|
static int mfd_platform_add_cell(struct platform_device *pdev,
|
|
const struct mfd_cell *cell,
|
|
atomic_t *usage_count)
|
|
{
|
|
if (!cell)
|
|
return 0;
|
|
|
|
pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
|
|
if (!pdev->mfd_cell)
|
|
return -ENOMEM;
|
|
|
|
pdev->mfd_cell->usage_count = usage_count;
|
|
return 0;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_ACPI)
|
|
static void mfd_acpi_add_device(const struct mfd_cell *cell,
|
|
struct platform_device *pdev)
|
|
{
|
|
const struct mfd_cell_acpi_match *match = cell->acpi_match;
|
|
struct acpi_device *parent, *child;
|
|
struct acpi_device *adev;
|
|
|
|
parent = ACPI_COMPANION(pdev->dev.parent);
|
|
if (!parent)
|
|
return;
|
|
|
|
/*
|
|
* MFD child device gets its ACPI handle either from the ACPI device
|
|
* directly under the parent that matches the either _HID or _CID, or
|
|
* _ADR or it will use the parent handle if is no ID is given.
|
|
*
|
|
* Note that use of _ADR is a grey area in the ACPI specification,
|
|
* though Intel Galileo Gen2 is using it to distinguish the children
|
|
* devices.
|
|
*/
|
|
adev = parent;
|
|
if (match) {
|
|
if (match->pnpid) {
|
|
struct acpi_device_id ids[2] = {};
|
|
|
|
strlcpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
|
|
list_for_each_entry(child, &parent->children, node) {
|
|
if (!acpi_match_device_ids(child, ids)) {
|
|
adev = child;
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
unsigned long long adr;
|
|
acpi_status status;
|
|
|
|
list_for_each_entry(child, &parent->children, node) {
|
|
status = acpi_evaluate_integer(child->handle,
|
|
"_ADR", NULL,
|
|
&adr);
|
|
if (ACPI_SUCCESS(status) && match->adr == adr) {
|
|
adev = child;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
ACPI_COMPANION_SET(&pdev->dev, adev);
|
|
}
|
|
#else
|
|
static inline void mfd_acpi_add_device(const struct mfd_cell *cell,
|
|
struct platform_device *pdev)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int mfd_add_device(struct device *parent, int id,
|
|
const struct mfd_cell *cell, atomic_t *usage_count,
|
|
struct resource *mem_base,
|
|
int irq_base, struct irq_domain *domain)
|
|
{
|
|
struct resource *res;
|
|
struct platform_device *pdev;
|
|
struct device_node *np = NULL;
|
|
int ret = -ENOMEM;
|
|
int platform_id;
|
|
int r;
|
|
|
|
if (id == PLATFORM_DEVID_AUTO)
|
|
platform_id = id;
|
|
else
|
|
platform_id = id + cell->id;
|
|
|
|
pdev = platform_device_alloc(cell->name, platform_id);
|
|
if (!pdev)
|
|
goto fail_alloc;
|
|
|
|
res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
|
|
if (!res)
|
|
goto fail_device;
|
|
|
|
pdev->dev.parent = parent;
|
|
pdev->dev.type = &mfd_dev_type;
|
|
pdev->dev.dma_mask = parent->dma_mask;
|
|
pdev->dev.dma_parms = parent->dma_parms;
|
|
pdev->dev.coherent_dma_mask = parent->coherent_dma_mask;
|
|
|
|
ret = regulator_bulk_register_supply_alias(
|
|
&pdev->dev, cell->parent_supplies,
|
|
parent, cell->parent_supplies,
|
|
cell->num_parent_supplies);
|
|
if (ret < 0)
|
|
goto fail_res;
|
|
|
|
if (parent->of_node && cell->of_compatible) {
|
|
for_each_child_of_node(parent->of_node, np) {
|
|
if (of_device_is_compatible(np, cell->of_compatible)) {
|
|
pdev->dev.of_node = np;
|
|
pdev->dev.fwnode = &np->fwnode;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
mfd_acpi_add_device(cell, pdev);
|
|
|
|
if (cell->pdata_size) {
|
|
ret = platform_device_add_data(pdev,
|
|
cell->platform_data, cell->pdata_size);
|
|
if (ret)
|
|
goto fail_alias;
|
|
}
|
|
|
|
if (cell->properties) {
|
|
ret = platform_device_add_properties(pdev, cell->properties);
|
|
if (ret)
|
|
goto fail_alias;
|
|
}
|
|
|
|
ret = mfd_platform_add_cell(pdev, cell, usage_count);
|
|
if (ret)
|
|
goto fail_alias;
|
|
|
|
for (r = 0; r < cell->num_resources; r++) {
|
|
res[r].name = cell->resources[r].name;
|
|
res[r].flags = cell->resources[r].flags;
|
|
|
|
/* Find out base to use */
|
|
if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
|
|
res[r].parent = mem_base;
|
|
res[r].start = mem_base->start +
|
|
cell->resources[r].start;
|
|
res[r].end = mem_base->start +
|
|
cell->resources[r].end;
|
|
} else if (cell->resources[r].flags & IORESOURCE_IRQ) {
|
|
if (domain) {
|
|
/* Unable to create mappings for IRQ ranges. */
|
|
WARN_ON(cell->resources[r].start !=
|
|
cell->resources[r].end);
|
|
res[r].start = res[r].end = irq_create_mapping(
|
|
domain, cell->resources[r].start);
|
|
} else {
|
|
res[r].start = irq_base +
|
|
cell->resources[r].start;
|
|
res[r].end = irq_base +
|
|
cell->resources[r].end;
|
|
}
|
|
} else {
|
|
res[r].parent = cell->resources[r].parent;
|
|
res[r].start = cell->resources[r].start;
|
|
res[r].end = cell->resources[r].end;
|
|
}
|
|
|
|
if (!cell->ignore_resource_conflicts) {
|
|
if (has_acpi_companion(&pdev->dev)) {
|
|
ret = acpi_check_resource_conflict(&res[r]);
|
|
if (ret)
|
|
goto fail_alias;
|
|
}
|
|
}
|
|
}
|
|
|
|
ret = platform_device_add_resources(pdev, res, cell->num_resources);
|
|
if (ret)
|
|
goto fail_alias;
|
|
|
|
ret = platform_device_add(pdev);
|
|
if (ret)
|
|
goto fail_alias;
|
|
|
|
if (cell->pm_runtime_no_callbacks)
|
|
pm_runtime_no_callbacks(&pdev->dev);
|
|
|
|
kfree(res);
|
|
|
|
return 0;
|
|
|
|
fail_alias:
|
|
regulator_bulk_unregister_supply_alias(&pdev->dev,
|
|
cell->parent_supplies,
|
|
cell->num_parent_supplies);
|
|
fail_res:
|
|
kfree(res);
|
|
fail_device:
|
|
platform_device_put(pdev);
|
|
fail_alloc:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* mfd_add_devices - register child devices
|
|
*
|
|
* @parent: Pointer to parent device.
|
|
* @id: Can be PLATFORM_DEVID_AUTO to let the Platform API take care
|
|
* of device numbering, or will be added to a device's cell_id.
|
|
* @cells: Array of (struct mfd_cell)s describing child devices.
|
|
* @n_devs: Number of child devices to register.
|
|
* @mem_base: Parent register range resource for child devices.
|
|
* @irq_base: Base of the range of virtual interrupt numbers allocated for
|
|
* this MFD device. Unused if @domain is specified.
|
|
* @domain: Interrupt domain to create mappings for hardware interrupts.
|
|
*/
|
|
int mfd_add_devices(struct device *parent, int id,
|
|
const struct mfd_cell *cells, int n_devs,
|
|
struct resource *mem_base,
|
|
int irq_base, struct irq_domain *domain)
|
|
{
|
|
int i;
|
|
int ret;
|
|
atomic_t *cnts;
|
|
|
|
/* initialize reference counting for all cells */
|
|
cnts = kcalloc(n_devs, sizeof(*cnts), GFP_KERNEL);
|
|
if (!cnts)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < n_devs; i++) {
|
|
atomic_set(&cnts[i], 0);
|
|
ret = mfd_add_device(parent, id, cells + i, cnts + i, mem_base,
|
|
irq_base, domain);
|
|
if (ret)
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
if (i)
|
|
mfd_remove_devices(parent);
|
|
else
|
|
kfree(cnts);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(mfd_add_devices);
|
|
|
|
static int mfd_remove_devices_fn(struct device *dev, void *c)
|
|
{
|
|
struct platform_device *pdev;
|
|
const struct mfd_cell *cell;
|
|
atomic_t **usage_count = c;
|
|
|
|
if (dev->type != &mfd_dev_type)
|
|
return 0;
|
|
|
|
pdev = to_platform_device(dev);
|
|
cell = mfd_get_cell(pdev);
|
|
|
|
regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
|
|
cell->num_parent_supplies);
|
|
|
|
/* find the base address of usage_count pointers (for freeing) */
|
|
if (!*usage_count || (cell->usage_count < *usage_count))
|
|
*usage_count = cell->usage_count;
|
|
|
|
platform_device_unregister(pdev);
|
|
return 0;
|
|
}
|
|
|
|
void mfd_remove_devices(struct device *parent)
|
|
{
|
|
atomic_t *cnts = NULL;
|
|
|
|
device_for_each_child_reverse(parent, &cnts, mfd_remove_devices_fn);
|
|
kfree(cnts);
|
|
}
|
|
EXPORT_SYMBOL(mfd_remove_devices);
|
|
|
|
static void devm_mfd_dev_release(struct device *dev, void *res)
|
|
{
|
|
mfd_remove_devices(dev);
|
|
}
|
|
|
|
/**
|
|
* devm_mfd_add_devices - Resource managed version of mfd_add_devices()
|
|
*
|
|
* Returns 0 on success or an appropriate negative error number on failure.
|
|
* All child-devices of the MFD will automatically be removed when it gets
|
|
* unbinded.
|
|
*/
|
|
int devm_mfd_add_devices(struct device *dev, int id,
|
|
const struct mfd_cell *cells, int n_devs,
|
|
struct resource *mem_base,
|
|
int irq_base, struct irq_domain *domain)
|
|
{
|
|
struct device **ptr;
|
|
int ret;
|
|
|
|
ptr = devres_alloc(devm_mfd_dev_release, sizeof(*ptr), GFP_KERNEL);
|
|
if (!ptr)
|
|
return -ENOMEM;
|
|
|
|
ret = mfd_add_devices(dev, id, cells, n_devs, mem_base,
|
|
irq_base, domain);
|
|
if (ret < 0) {
|
|
devres_free(ptr);
|
|
return ret;
|
|
}
|
|
|
|
*ptr = dev;
|
|
devres_add(dev, ptr);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(devm_mfd_add_devices);
|
|
|
|
int mfd_clone_cell(const char *cell, const char **clones, size_t n_clones)
|
|
{
|
|
struct mfd_cell cell_entry;
|
|
struct device *dev;
|
|
struct platform_device *pdev;
|
|
int i;
|
|
|
|
/* fetch the parent cell's device (should already be registered!) */
|
|
dev = bus_find_device_by_name(&platform_bus_type, NULL, cell);
|
|
if (!dev) {
|
|
printk(KERN_ERR "failed to find device for cell %s\n", cell);
|
|
return -ENODEV;
|
|
}
|
|
pdev = to_platform_device(dev);
|
|
memcpy(&cell_entry, mfd_get_cell(pdev), sizeof(cell_entry));
|
|
|
|
WARN_ON(!cell_entry.enable);
|
|
|
|
for (i = 0; i < n_clones; i++) {
|
|
cell_entry.name = clones[i];
|
|
/* don't give up if a single call fails; just report error */
|
|
if (mfd_add_device(pdev->dev.parent, -1, &cell_entry,
|
|
cell_entry.usage_count, NULL, 0, NULL))
|
|
dev_err(dev, "failed to create platform device '%s'\n",
|
|
clones[i]);
|
|
}
|
|
|
|
put_device(dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(mfd_clone_cell);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");
|