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mfd: cros_ec: Add convenience struct to define autodetectable CrOS EC subdevices

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The CrOS EC is gaining lots of subdevices that are autodetectable by
sending the EC_FEATURE_GET_CMD, it takes fair amount of boiler plate
code to add those devices. So, add a struct that can be used to quickly
add new subdevices without having to duplicate code.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Tested-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Enric Balletbo i Serra 2019-09-02 11:53:08 +02:00 committed by Lee Jones
parent b027dcf7c4
commit 832a636f6a
1 changed files with 73 additions and 58 deletions
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131
drivers/mfd/cros_ec_dev.c
View file

@ -35,6 +35,18 @@ struct cros_feature_to_name {
const char *desc;
};
/**
* cros_feature_to_cells - CrOS feature id to mfd cells association.
* @id: The feature identifier.
* @mfd_cells: Pointer to the array of mfd cells that needs to be added.
* @num_cells: Number of mfd cells into the array.
*/
struct cros_feature_to_cells {
unsigned int id;
const struct mfd_cell *mfd_cells;
unsigned int num_cells;
};
static const struct cros_feature_to_name cros_mcu_devices[] = {
{
.id = EC_FEATURE_FINGERPRINT,
@ -58,6 +70,48 @@ static const struct cros_feature_to_name cros_mcu_devices[] = {
},
};
static const struct mfd_cell cros_ec_cec_cells[] = {
{ .name = "cros-ec-cec", },
};
static const struct mfd_cell cros_ec_rtc_cells[] = {
{ .name = "cros-ec-rtc", },
};
static const struct mfd_cell cros_usbpd_charger_cells[] = {
{ .name = "cros-usbpd-charger", },
{ .name = "cros-usbpd-logger", },
};
static const struct cros_feature_to_cells cros_subdevices[] = {
{
.id = EC_FEATURE_CEC,
.mfd_cells = cros_ec_cec_cells,
.num_cells = ARRAY_SIZE(cros_ec_cec_cells),
},
{
.id = EC_FEATURE_RTC,
.mfd_cells = cros_ec_rtc_cells,
.num_cells = ARRAY_SIZE(cros_ec_rtc_cells),
},
{
.id = EC_FEATURE_USB_PD,
.mfd_cells = cros_usbpd_charger_cells,
.num_cells = ARRAY_SIZE(cros_usbpd_charger_cells),
},
};
static const struct mfd_cell cros_ec_platform_cells[] = {
{ .name = "cros-ec-chardev", },
{ .name = "cros-ec-debugfs", },
{ .name = "cros-ec-lightbar", },
{ .name = "cros-ec-sysfs", },
};
static const struct mfd_cell cros_ec_vbc_cells[] = {
{ .name = "cros-ec-vbc", }
};
static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
{
struct cros_ec_command *msg;
@ -283,30 +337,6 @@ static void cros_ec_accel_legacy_register(struct cros_ec_dev *ec)
dev_err(ec_dev->dev, "failed to add EC sensors\n");
}
static const struct mfd_cell cros_ec_cec_cells[] = {
{ .name = "cros-ec-cec" }
};
static const struct mfd_cell cros_ec_rtc_cells[] = {
{ .name = "cros-ec-rtc" }
};
static const struct mfd_cell cros_usbpd_charger_cells[] = {
{ .name = "cros-usbpd-charger" },
{ .name = "cros-usbpd-logger" },
};
static const struct mfd_cell cros_ec_platform_cells[] = {
{ .name = "cros-ec-chardev" },
{ .name = "cros-ec-debugfs" },
{ .name = "cros-ec-lightbar" },
{ .name = "cros-ec-sysfs" },
};
static const struct mfd_cell cros_ec_vbc_cells[] = {
{ .name = "cros-ec-vbc" }
};
static int ec_device_probe(struct platform_device *pdev)
{
int retval = -ENOMEM;
@ -368,42 +398,27 @@ static int ec_device_probe(struct platform_device *pdev)
/* Workaroud for older EC firmware */
cros_ec_accel_legacy_register(ec);
/* Check whether this EC instance has CEC host command support */
if (cros_ec_check_features(ec, EC_FEATURE_CEC)) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_cec_cells,
ARRAY_SIZE(cros_ec_cec_cells),
NULL, 0, NULL);
if (retval)
dev_err(ec->dev,
"failed to add cros-ec-cec device: %d\n",
retval);
}
/* Check whether this EC instance has RTC host command support */
if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_rtc_cells,
ARRAY_SIZE(cros_ec_rtc_cells),
NULL, 0, NULL);
if (retval)
dev_err(ec->dev,
"failed to add cros-ec-rtc device: %d\n",
retval);
}
/* Check whether this EC instance has the PD charge manager */
if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_usbpd_charger_cells,
ARRAY_SIZE(cros_usbpd_charger_cells),
NULL, 0, NULL);
if (retval)
dev_err(ec->dev,
"failed to add cros-usbpd-charger device: %d\n",
retval);
/*
* The following subdevices can be detected by sending the
* EC_FEATURE_GET_CMD Embedded Controller device.
*/
for (i = 0; i < ARRAY_SIZE(cros_subdevices); i++) {
if (cros_ec_check_features(ec, cros_subdevices[i].id)) {
retval = mfd_add_hotplug_devices(ec->dev,
cros_subdevices[i].mfd_cells,
cros_subdevices[i].num_cells);
if (retval)
dev_err(ec->dev,
"failed to add %s subdevice: %d\n",
cros_subdevices[i].mfd_cells->name,
retval);
}
}
/*
* The following subdevices cannot be detected by sending the
* EC_FEATURE_GET_CMD to the Embedded Controller device.
*/
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_platform_cells,
ARRAY_SIZE(cros_ec_platform_cells),