Messages in this thread Patch in this message | | | From | Enric Balletbo i Serra <> | Subject | [PATCH 09/10] mfd: cros_ec: Add convenience struct to define dedicated CrOS EC MCUs | Date | Tue, 4 Jun 2019 17:20:18 +0200 |
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With the increasing use of dedicated CrOS EC MCUs, it takes a fair amount of boiler plate code to add those devices, add a struct that can be used to specify a dedicated CrOS EC MCU so we can just add a new item to it to define a new dedicated MCU.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> ---
drivers/mfd/cros_ec_dev.c | 72 +++++++++++++++++++++++---------------- 1 file changed, 43 insertions(+), 29 deletions(-)
diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c index 5663fda3739c..6fcfc8f17e03 100644 --- a/drivers/mfd/cros_ec_dev.c +++ b/drivers/mfd/cros_ec_dev.c @@ -22,6 +22,36 @@ static struct class cros_class = { .name = "chromeos", }; +/** + * cros_feature_to_name - CrOS feature id to name/short description. + * @id: The feature identifier. + * @name: Device name associated with the feature id. + * @desc: Short name that will be displayed. + */ +struct cros_feature_to_name { + unsigned int id; + const char *name; + const char *desc; +}; + +static const struct cros_feature_to_name cros_mcu_devices[] = { + { + .id = EC_FEATURE_FINGERPRINT, + .name = CROS_EC_DEV_FP_NAME, + .desc = "Fingerprint", + }, + { + .id = EC_FEATURE_ISH, + .name = CROS_EC_DEV_ISH_NAME, + .desc = "Integrated Sensor Hub", + }, + { + .id = EC_FEATURE_TOUCHPAD, + .name = CROS_EC_DEV_TP_NAME, + .desc = "Touchpad", + }, +}; + static int cros_ec_check_features(struct cros_ec_dev *ec, int feature) { struct cros_ec_command *msg; @@ -212,6 +242,7 @@ static int ec_device_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct cros_ec_platform *ec_platform = dev_get_platdata(dev); struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL); + int i; if (!ec) return retval; @@ -224,37 +255,20 @@ static int ec_device_probe(struct platform_device *pdev) ec->features[1] = -1U; /* Not cached yet */ device_initialize(&ec->class_dev); - /* Check whether this is actually a Fingerprint MCU rather than an EC */ - if (cros_ec_check_features(ec, EC_FEATURE_FINGERPRINT)) { - dev_info(dev, "CrOS Fingerprint MCU detected.\n"); + for (i = 0; i < ARRAY_SIZE(cros_mcu_devices); i++) { /* - * Help userspace differentiating ECs from FP MCU, - * regardless of the probing order. + * Check whether this is actually a dedicated MCU rather + * than an standard EC. */ - ec_platform->ec_name = CROS_EC_DEV_FP_NAME; - } - - /* - * Check whether this is actually an Integrated Sensor Hub (ISH) - * rather than an EC. - */ - if (cros_ec_check_features(ec, EC_FEATURE_ISH)) { - dev_info(dev, "CrOS ISH MCU detected.\n"); - /* - * Help userspace differentiating ECs from ISH MCU, - * regardless of the probing order. - */ - ec_platform->ec_name = CROS_EC_DEV_ISH_NAME; - } - - /* Check whether this is actually a Touchpad MCU rather than an EC */ - if (cros_ec_check_features(ec, EC_FEATURE_TOUCHPAD)) { - dev_info(dev, "CrOS Touchpad MCU detected.\n"); - /* - * Help userspace differentiating ECs from TP MCU, - * regardless of the probing order. - */ - ec_platform->ec_name = CROS_EC_DEV_TP_NAME; + if (cros_ec_check_features(ec, cros_mcu_devices[i].id)) { + dev_info(dev, "CrOS %s MCU detected\n", + cros_mcu_devices[i].desc); + /* + * Help userspace differentiating ECs from other MCU, + * regardless of the probing order. + */ + ec_platform->ec_name = cros_mcu_devices[i].name; + } } /* -- 2.20.1
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