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misc: keba: Add battery device

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Add support for the battery auxiliary device. This enables monitoring of
the battery.

Signed-off-by: Gerhard Engleder <eg@keba.com>
Link: https://lore.kernel.org/r/20241011191257.19702-8-gerhard@engleder-embedded.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gerhard Engleder 2024-10-11 21:12:56 +02:00 committed by Greg Kroah-Hartman
parent f965d315bc
commit ca7b844b91
2 changed files with 69 additions and 0 deletions
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59
drivers/misc/keba/cp500.c
View File

@ -82,6 +82,7 @@ struct cp500_devs {
struct cp500_dev_info spi;
struct cp500_dev_info i2c;
struct cp500_dev_info fan;
struct cp500_dev_info batt;
};
/* list of devices within FPGA of CP035 family (CP035, CP056, CP057) */
@ -90,6 +91,7 @@ static struct cp500_devs cp035_devices = {
.spi = { 0x1000, SZ_4K },
.i2c = { 0x4000, SZ_4K },
.fan = { 0x9000, SZ_4K },
.batt = { 0xA000, SZ_4K },
};
/* list of devices within FPGA of CP505 family (CP503, CP505, CP507) */
@ -98,6 +100,7 @@ static struct cp500_devs cp505_devices = {
.spi = { 0x4000, SZ_4K },
.i2c = { 0x5000, SZ_4K },
.fan = { 0x9000, SZ_4K },
.batt = { 0xA000, SZ_4K },
};
/* list of devices within FPGA of CP520 family (CP520, CP530) */
@ -106,6 +109,7 @@ static struct cp500_devs cp520_devices = {
.spi = { 0x4000, SZ_4K },
.i2c = { 0x5000, SZ_4K },
.fan = { 0x8000, SZ_4K },
.batt = { 0x9000, SZ_4K },
};
struct cp500_nvmem {
@ -130,6 +134,7 @@ struct cp500 {
struct keba_spi_auxdev *spi;
struct keba_i2c_auxdev *i2c;
struct keba_fan_auxdev *fan;
struct keba_batt_auxdev *batt;
/* ECM EtherCAT BAR */
resource_size_t ecm_hwbase;
@ -457,6 +462,54 @@ static int cp500_register_fan(struct cp500 *cp500)
return 0;
}
static void cp500_batt_release(struct device *dev)
{
struct keba_batt_auxdev *fan =
container_of(dev, struct keba_batt_auxdev, auxdev.dev);
kfree(fan);
}
static int cp500_register_batt(struct cp500 *cp500)
{
int ret;
cp500->batt = kzalloc(sizeof(*cp500->batt), GFP_KERNEL);
if (!cp500->batt)
return -ENOMEM;
cp500->batt->auxdev.name = "batt";
cp500->batt->auxdev.id = 0;
cp500->batt->auxdev.dev.release = cp500_batt_release;
cp500->batt->auxdev.dev.parent = &cp500->pci_dev->dev;
cp500->batt->io = (struct resource) {
/* battery register area */
.start = (resource_size_t) cp500->sys_hwbase +
cp500->devs->batt.offset,
.end = (resource_size_t) cp500->sys_hwbase +
cp500->devs->batt.offset +
cp500->devs->batt.size - 1,
.flags = IORESOURCE_MEM,
};
ret = auxiliary_device_init(&cp500->batt->auxdev);
if (ret) {
kfree(cp500->batt);
cp500->batt = NULL;
return ret;
}
ret = __auxiliary_device_add(&cp500->batt->auxdev, "keba");
if (ret) {
auxiliary_device_uninit(&cp500->batt->auxdev);
cp500->batt = NULL;
return ret;
}
return 0;
}
static int cp500_nvmem_read(void *priv, unsigned int offset, void *val,
size_t bytes)
{
@ -613,6 +666,8 @@ static void cp500_register_auxiliary_devs(struct cp500 *cp500)
if (present & CP500_PRESENT_FAN0)
if (cp500_register_fan(cp500))
dev_warn(dev, "Failed to register fan!\n");
if (cp500_register_batt(cp500))
dev_warn(dev, "Failed to register battery!\n");
}
static void cp500_unregister_dev(struct auxiliary_device *auxdev)
@ -635,6 +690,10 @@ static void cp500_unregister_auxiliary_devs(struct cp500 *cp500)
cp500_unregister_dev(&cp500->fan->auxdev);
cp500->fan = NULL;
}
if (cp500->batt) {
cp500_unregister_dev(&cp500->batt->auxdev);
cp500->batt = NULL;
}
}
static irqreturn_t cp500_axi_handler(int irq, void *dev)

10
include/linux/misc/keba.h
View File

@ -47,4 +47,14 @@ struct keba_fan_auxdev {
struct resource io;
};
/**
* struct keba_batt_auxdev - KEBA battery auxiliary device
* @auxdev: auxiliary device object
* @io: address range of battery controller IO memory
*/
struct keba_batt_auxdev {
struct auxiliary_device auxdev;
struct resource io;
};
#endif /* _LINUX_MISC_KEBA_H */