linux-kernel - [PATCH v3 3/3] mfd: cros_ec_dev: Register cros

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Date:   Wed,  2 May 2018 11:53:43 +0200
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     Lee Jones <lee.jones@...aro.org>,
        Sebastian Reichel <sre@...nel.org>
Cc:     Gwendal Grignou <gwendal@...omium.org>,
        Sameer Nanda <snanda@...omium.org>, linux-pm@...r.kernel.org,
        Guenter Roeck <groeck@...omium.org>,
        linux-kernel@...r.kernel.org, Benson Leung <bleung@...omium.org>,
        miguel.ojeda.sandonis@...il.com, kernel@...labora.com
Subject: [PATCH v3 3/3] mfd: cros_ec_dev: Register cros_usbpd-charger driver as a subdevice.

Check whether this EC instance has USBPD host command support and
instatiate the cros_usbpd-charger driver as a subdevice in such case.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---

Changes in v3: None
Changes in v2:
- [3/3] Use ARRAY_SIZE instead of hardcoded 1.

 drivers/mfd/cros_ec_dev.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index 1d6dc5c7a19d..d06870da3a2e 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -387,6 +387,10 @@ 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" }
+};
+
 static int ec_device_probe(struct platform_device *pdev)
 {
 	int retval = -ENOMEM;
@@ -438,6 +442,18 @@ static int ec_device_probe(struct platform_device *pdev)
 				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);
+	}
+
 	/* Take control of the lightbar from the EC. */
 	lb_manual_suspend_ctrl(ec, 1);
 
-- 
2.17.0