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
  ...

1 files changed, 89 insertions, 3 deletions

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index a5391f96eafd..41dccced5026 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -285,13 +285,15 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
 
 	resp = (struct ec_response_motion_sense *)msg->data;
 	sensor_num = resp->dump.sensor_count;
-	/* Allocate 1 extra sensors in FIFO are needed */
-	sensor_cells = kcalloc(sensor_num + 1, sizeof(struct mfd_cell),
+	/*
+	 * Allocate 2 extra sensors if lid angle sensor and/or FIFO are needed.
+	 */
+	sensor_cells = kcalloc(sensor_num + 2, sizeof(struct mfd_cell),
 			       GFP_KERNEL);
 	if (sensor_cells == NULL)
 		goto error;
 
-	sensor_platforms = kcalloc(sensor_num + 1,
+	sensor_platforms = kcalloc(sensor_num,
 				   sizeof(struct cros_ec_sensor_platform),
 				   GFP_KERNEL);
 	if (sensor_platforms == NULL)
@@ -351,6 +353,11 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
 		sensor_cells[id].name = "cros-ec-ring";
 		id++;
 	}
+	if (cros_ec_check_features(ec,
+				EC_FEATURE_REFINED_TABLET_MODE_HYSTERESIS)) {
+		sensor_cells[id].name = "cros-ec-lid-angle";
+		id++;
+	}
 
 	ret = mfd_add_devices(ec->dev, 0, sensor_cells, id,
 			      NULL, 0, NULL);
@@ -364,6 +371,72 @@ error:
 	kfree(msg);
 }
 
+static struct cros_ec_sensor_platform sensor_platforms[] = {
+	{ .sensor_num = 0 },
+	{ .sensor_num = 1 }
+};
+
+static const struct mfd_cell cros_ec_accel_legacy_cells[] = {
+	{
+		.name = "cros-ec-accel-legacy",
+		.platform_data = &sensor_platforms[0],
+		.pdata_size = sizeof(struct cros_ec_sensor_platform),
+	},
+	{
+		.name = "cros-ec-accel-legacy",
+		.platform_data = &sensor_platforms[1],
+		.pdata_size = sizeof(struct cros_ec_sensor_platform),
+	}
+};
+
+static void cros_ec_accel_legacy_register(struct cros_ec_dev *ec)
+{
+	struct cros_ec_device *ec_dev = ec->ec_dev;
+	u8 status;
+	int ret;
+
+	/*
+	 * ECs that need legacy support are the main EC, directly connected to
+	 * the AP.
+	 */
+	if (ec->cmd_offset != 0)
+		return;
+
+	/*
+	 * Check if EC supports direct memory reads and if EC has
+	 * accelerometers.
+	 */
+	if (ec_dev->cmd_readmem) {
+		ret = ec_dev->cmd_readmem(ec_dev, EC_MEMMAP_ACC_STATUS, 1,
+					  &status);
+		if (ret < 0) {
+			dev_warn(ec->dev, "EC direct read error.\n");
+			return;
+		}
+
+		/* Check if EC has accelerometers. */
+		if (!(status & EC_MEMMAP_ACC_STATUS_PRESENCE_BIT)) {
+			dev_info(ec->dev, "EC does not have accelerometers.\n");
+			return;
+		}
+	}
+
+	/*
+	 * The device may still support accelerometers:
+	 * it would be an older ARM based device that do not suppor the
+	 * EC_CMD_GET_FEATURES command.
+	 *
+	 * Register 2 accelerometers, we will fail in the IIO driver if there
+	 * are no sensors.
+	 */
+	ret = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
+			      cros_ec_accel_legacy_cells,
+			      ARRAY_SIZE(cros_ec_accel_legacy_cells),
+			      NULL, 0, NULL);
+	if (ret)
+		dev_err(ec_dev->dev, "failed to add EC sensors\n");
+}
+
 static const struct mfd_cell cros_ec_cec_cells[] = {
 	{ .name = "cros-ec-cec" }
 };
@@ -440,6 +513,16 @@ static int ec_device_probe(struct platform_device *pdev)
 		ec_platform->ec_name = CROS_EC_DEV_TP_NAME;
 	}
 
+	/* Check whether this is actually a SCP rather than an EC. */
+	if (cros_ec_check_features(ec, EC_FEATURE_SCP)) {
+		dev_info(dev, "CrOS SCP MCU detected.\n");
+		/*
+		 * Help userspace differentiating ECs from SCP,
+		 * regardless of the probing order.
+		 */
+		ec_platform->ec_name = CROS_EC_DEV_SCP_NAME;
+	}
+
 	/*
 	 * Add the class device
 	 * Link to the character device for creating the /dev entry
@@ -459,6 +542,9 @@ static int ec_device_probe(struct platform_device *pdev)
 	/* check whether this EC is a sensor hub. */
 	if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
 		cros_ec_sensors_register(ec);
+	else
+		/* 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)) {