Merge tag 'mfd-for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Merge commit. Changes below are compared with the first parent: bc49a783.
Changes
31 files changed · +1558 −144
Only the first 600 diff lines are shown. Download the complete patch.
Documentation/devicetree/bindings/mfd/aspeed-gfx.txt
View filediff --git a/Documentation/devicetree/bindings/mfd/aspeed-gfx.txt b/Documentation/devicetree/bindings/mfd/aspeed-gfx.txt
new file mode 100644
index 0000000..aea5370
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/aspeed-gfx.txt
@@ -0,0 +1,17 @@
+* Device tree bindings for Aspeed SoC Display Controller (GFX)
+
+The Aspeed SoC Display Controller primarily does as its name suggests, but also
+participates in pinmux requests on the g5 SoCs. It is therefore considered a
+syscon device.
+
+Required properties:
+- compatible: "aspeed,ast2500-gfx", "syscon"
+- reg: contains offset/length value of the GFX memory
+ region.
+
+Example:
+
+gfx: display@1e6e6000 {
+ compatible = "aspeed,ast2500-gfx", "syscon";
+ reg = <0x1e6e6000 0x1000>;
+};
Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
View filediff --git a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
new file mode 100644
index 0000000..514d82c
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
@@ -0,0 +1,137 @@
+======================================================================
+Device tree bindings for the Aspeed Low Pin Count (LPC) Bus Controller
+======================================================================
+
+The LPC bus is a means to bridge a host CPU to a number of low-bandwidth
+peripheral devices, replacing the use of the ISA bus in the age of PCI[0]. The
+primary use case of the Aspeed LPC controller is as a slave on the bus
+(typically in a Baseboard Management Controller SoC), but under certain
+conditions it can also take the role of bus master.
+
+The LPC controller is represented as a multi-function device to account for the
+mix of functionality it provides. The principle split is between the register
+layout at the start of the I/O space which is, to quote the Aspeed datasheet,
+"basically compatible with the [LPC registers from the] popular BMC controller
+H8S/2168[1]", and everything else, where everything else is an eclectic
+collection of functions with a esoteric register layout. "Everything else",
+here labeled the "host" portion of the controller, includes, but is not limited
+to:
+
+* An IPMI Block Transfer[2] Controller
+
+* An LPC Host Controller: Manages LPC functions such as host vs slave mode, the
+ physical properties of some LPC pins, configuration of serial IRQs, and
+ APB-to-LPC bridging amonst other functions.
+
+* An LPC Host Interface Controller: Manages functions exposed to the host such
+ as LPC firmware hub cycles, configuration of the LPC-to-AHB mapping, UART
+ management and bus snoop configuration.
+
+* A set of SuperIO[3] scratch registers: Enables implementation of e.g. custom
+ hardware management protocols for handover between the host and baseboard
+ management controller.
+
+Additionally the state of the LPC controller influences the pinmux
+configuration, therefore the host portion of the controller is exposed as a
+syscon as a means to arbitrate access.
+
+[0] http://www.intel.com/design/chipsets/industry/25128901.pdf
+[1] https://www.renesas.com/en-sg/doc/products/mpumcu/001/rej09b0078_h8s2168.pdf?key=7c88837454702128622bee53acbda8f4
+[2] http://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmi-second-gen-interface-spec-v2-rev1-1.pdf
+[3] https://en.wikipedia.org/wiki/Super_I/O
+
+Required properties
+===================
+
+- compatible: One of:
+ "aspeed,ast2400-lpc", "simple-mfd"
+ "aspeed,ast2500-lpc", "simple-mfd"
+
+- reg: contains the physical address and length values of the Aspeed
+ LPC memory region.
+
+- #address-cells: <1>
+- #size-cells: <1>
+- ranges: Maps 0 to the physical address and length of the LPC memory
+ region
+
+Required LPC Child nodes
+========================
+
+BMC Node
+--------
+
+- compatible: One of:
+ "aspeed,ast2400-lpc-bmc"
+ "aspeed,ast2500-lpc-bmc"
+
+- reg: contains the physical address and length values of the
+ H8S/2168-compatible LPC controller memory region
+
+Host Node
+---------
+
+- compatible: One of:
+ "aspeed,ast2400-lpc-host", "simple-mfd", "syscon"
+ "aspeed,ast2500-lpc-host", "simple-mfd", "syscon"
+
+- reg: contains the address and length values of the host-related
+ register space for the Aspeed LPC controller
+
+- #address-cells: <1>
+- #size-cells: <1>
+- ranges: Maps 0 to the address and length of the host-related LPC memory
+ region
+
+Example:
+
+lpc: lpc@1e789000 {
+ compatible = "aspeed,ast2500-lpc", "simple-mfd";
+ reg = <0x1e789000 0x1000>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x0 0x1e789000 0x1000>;
+
+ lpc_bmc: lpc-bmc@0 {
+ compatible = "aspeed,ast2500-lpc-bmc";
+ reg = <0x0 0x80>;
+ };
+
+ lpc_host: lpc-host@80 {
+ compatible = "aspeed,ast2500-lpc-host", "simple-mfd", "syscon";
+ reg = <0x80 0x1e0>;
+ reg-io-width = <4>;
+
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x0 0x80 0x1e0>;
+ };
+};
+
+Host Node Children
+==================
+
+LPC Host Controller
+-------------------
+
+The Aspeed LPC Host Controller configures the Low Pin Count (LPC) bus behaviour
+between the host and the baseboard management controller. The registers exist
+in the "host" portion of the Aspeed LPC controller, which must be the parent of
+the LPC host controller node.
+
+Required properties:
+
+- compatible: One of:
+ "aspeed,ast2400-lhc";
+ "aspeed,ast2500-lhc";
+
+- reg: contains offset/length values of the LHC memory regions. In the
+ AST2400 and AST2500 there are two regions.
+
+Example:
+
+lhc: lhc@20 {
+ compatible = "aspeed,ast2500-lhc";
+ reg = <0x20 0x24 0x48 0x8>;
+};
Documentation/devicetree/bindings/mfd/mfd.txt
View filediff --git a/Documentation/devicetree/bindings/mfd/mfd.txt b/Documentation/devicetree/bindings/mfd/mfd.txt
index af9d693..bcb6abb 100644
--- a/Documentation/devicetree/bindings/mfd/mfd.txt
+++ b/Documentation/devicetree/bindings/mfd/mfd.txt
@@ -19,12 +19,22 @@ Optional properties:
- compatible : "simple-mfd" - this signifies that the operating system should
consider all subnodes of the MFD device as separate devices akin to how
- "simple-bus" inidicates when to see subnodes as children for a simple
+ "simple-bus" indicates when to see subnodes as children for a simple
memory-mapped bus. For more complex devices, when the nexus driver has to
probe registers to figure out what child devices exist etc, this should not
be used. In the latter case the child devices will be determined by the
operating system.
+- ranges: Describes the address mapping relationship to the parent. Should set
+ the child's base address to 0, the physical address within parent's address
+ space, and the length of the address map.
+
+- #address-cells: Specifies the number of cells used to represent physical base
+ addresses. Must be present if ranges is used.
+
+- #size-cells: Specifies the number of cells used to represent the size of an
+ address. Must be present if ranges is used.
+
Example:
foo@1000 {
Documentation/devicetree/bindings/mfd/motorola-cpcap.txt
View filediff --git a/Documentation/devicetree/bindings/mfd/motorola-cpcap.txt b/Documentation/devicetree/bindings/mfd/motorola-cpcap.txt
new file mode 100644
index 0000000..15bc885
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/motorola-cpcap.txt
@@ -0,0 +1,31 @@
+Motorola CPCAP PMIC device tree binding
+
+Required properties:
+- compatible : One or both of "motorola,cpcap" or "ste,6556002"
+- reg : SPI chip select
+- interrupt-parent : The parent interrupt controller
+- interrupts : The interrupt line the device is connected to
+- interrupt-controller : Marks the device node as an interrupt controller
+- #interrupt-cells : The number of cells to describe an IRQ, should be 2
+- #address-cells : Child device offset number of cells, should be 1
+- #size-cells : Child device size number of cells, should be 0
+- spi-max-frequency : Typically set to 3000000
+- spi-cs-high : SPI chip select direction
+
+Example:
+
+&mcspi1 {
+ cpcap: pmic@0 {
+ compatible = "motorola,cpcap", "ste,6556002";
+ reg = <0>; /* cs0 */
+ interrupt-parent = <&gpio1>;
+ interrupts = <7 IRQ_TYPE_EDGE_RISING>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi-max-frequency = <3000000>;
+ spi-cs-high;
+ };
+};
+
Documentation/devicetree/bindings/mfd/mt6397.txt
View filediff --git a/Documentation/devicetree/bindings/mfd/mt6397.txt b/Documentation/devicetree/bindings/mfd/mt6397.txt
index 949c85f..c568d52 100644
--- a/Documentation/devicetree/bindings/mfd/mt6397.txt
+++ b/Documentation/devicetree/bindings/mfd/mt6397.txt
@@ -34,6 +34,10 @@ Optional subnodes:
- clk
Required properties:
- compatible: "mediatek,mt6397-clk"
+- led
+ Required properties:
+ - compatible: "mediatek,mt6323-led"
+ see Documentation/devicetree/bindings/leds/leds-mt6323.txt
Example:
pwrap: pwrap@1000f000 {
MAINTAINERS
View filediff --git a/MAINTAINERS b/MAINTAINERS
index ad4f2ce..7515e66 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8476,6 +8476,7 @@ S: Supported
F: Documentation/devicetree/bindings/mfd/
F: drivers/mfd/
F: include/linux/mfd/
+F: include/dt-bindings/mfd/
MULTIMEDIA CARD (MMC), SECURE DIGITAL (SD) AND SDIO SUBSYSTEM
M: Ulf Hansson <[email protected]>
drivers/input/keyboard/cros_ec_keyb.c
View filediff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
index 25943e9..604c7ad 100644
--- a/drivers/input/keyboard/cros_ec_keyb.c
+++ b/drivers/input/keyboard/cros_ec_keyb.c
@@ -34,6 +34,8 @@
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
+#include <asm/unaligned.h>
+
/*
* @rows: Number of rows in the keypad
* @cols: Number of columns in the keypad
@@ -43,8 +45,9 @@
* @valid_keys: bitmap of existing keys for each matrix column
* @old_kb_state: bitmap of keys pressed last scan
* @dev: Device pointer
- * @idev: Input device
* @ec: Top level ChromeOS device to use to talk to EC
+ * @idev: The input device for the matrix keys.
+ * @bs_idev: The input device for non-matrix buttons and switches (or NULL).
* @notifier: interrupt event notifier for transport devices
*/
struct cros_ec_keyb {
@@ -57,12 +60,64 @@ struct cros_ec_keyb {
uint8_t *old_kb_state;
struct device *dev;
- struct input_dev *idev;
struct cros_ec_device *ec;
+
+ struct input_dev *idev;
+ struct input_dev *bs_idev;
struct notifier_block notifier;
};
+/**
+ * cros_ec_bs_map - Struct mapping Linux keycodes to EC button/switch bitmap
+ * #defines
+ *
+ * @ev_type: The type of the input event to generate (e.g., EV_KEY).
+ * @code: A linux keycode
+ * @bit: A #define like EC_MKBP_POWER_BUTTON or EC_MKBP_LID_OPEN
+ * @inverted: If the #define and EV_SW have opposite meanings, this is true.
+ * Only applicable to switches.
+ */
+struct cros_ec_bs_map {
+ unsigned int ev_type;
+ unsigned int code;
+ u8 bit;
+ bool inverted;
+};
+
+/* cros_ec_keyb_bs - Map EC button/switch #defines into kernel ones */
+static const struct cros_ec_bs_map cros_ec_keyb_bs[] = {
+ /* Buttons */
+ {
+ .ev_type = EV_KEY,
+ .code = KEY_POWER,
+ .bit = EC_MKBP_POWER_BUTTON,
+ },
+ {
+ .ev_type = EV_KEY,
+ .code = KEY_VOLUMEUP,
+ .bit = EC_MKBP_VOL_UP,
+ },
+ {
+ .ev_type = EV_KEY,
+ .code = KEY_VOLUMEDOWN,
+ .bit = EC_MKBP_VOL_DOWN,
+ },
+
+ /* Switches */
+ {
+ .ev_type = EV_SW,
+ .code = SW_LID,
+ .bit = EC_MKBP_LID_OPEN,
+ .inverted = true,
+ },
+ {
+ .ev_type = EV_SW,
+ .code = SW_TABLET_MODE,
+ .bit = EC_MKBP_TABLET_MODE,
+ },
+};
+
/*
* Returns true when there is at least one combination of pressed keys that
* results in ghosting.
@@ -149,20 +204,33 @@ static void cros_ec_keyb_process(struct cros_ec_keyb *ckdev,
input_sync(ckdev->idev);
}
-static int cros_ec_keyb_open(struct input_dev *dev)
+/**
+ * cros_ec_keyb_report_bs - Report non-matrixed buttons or switches
+ *
+ * This takes a bitmap of buttons or switches from the EC and reports events,
+ * syncing at the end.
+ *
+ * @ckdev: The keyboard device.
+ * @ev_type: The input event type (e.g., EV_KEY).
+ * @mask: A bitmap of buttons from the EC.
+ */
+static void cros_ec_keyb_report_bs(struct cros_ec_keyb *ckdev,
+ unsigned int ev_type, u32 mask)
+
{
- struct cros_ec_keyb *ckdev = input_get_drvdata(dev);
+ struct input_dev *idev = ckdev->bs_idev;
+ int i;
- return blocking_notifier_chain_register(&ckdev->ec->event_notifier,
- &ckdev->notifier);
-}
+ for (i = 0; i < ARRAY_SIZE(cros_ec_keyb_bs); i++) {
+ const struct cros_ec_bs_map *map = &cros_ec_keyb_bs[i];
-static void cros_ec_keyb_close(struct input_dev *dev)
-{
- struct cros_ec_keyb *ckdev = input_get_drvdata(dev);
+ if (map->ev_type != ev_type)
+ continue;
- blocking_notifier_chain_unregister(&ckdev->ec->event_notifier,
- &ckdev->notifier);
+ input_event(idev, ev_type, map->code,
+ !!(mask & BIT(map->bit)) ^ map->inverted);
+ }
+ input_sync(idev);
}
static int cros_ec_keyb_work(struct notifier_block *nb,
@@ -170,22 +238,54 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
{
struct cros_ec_keyb *ckdev = container_of(nb, struct cros_ec_keyb,
notifier);
+ u32 val;
+ unsigned int ev_type;
+
+ switch (ckdev->ec->event_data.event_type) {
+ case EC_MKBP_EVENT_KEY_MATRIX:
+ /*
+ * If EC is not the wake source, discard key state changes
+ * during suspend.
+ */
+ if (queued_during_suspend)
+ return NOTIFY_OK;
- if (ckdev->ec->event_data.event_type != EC_MKBP_EVENT_KEY_MATRIX)
+ if (ckdev->ec->event_size != ckdev->cols) {
+ dev_err(ckdev->dev,
+ "Discarded incomplete key matrix event.\n");
+ return NOTIFY_OK;
+ }
+ cros_ec_keyb_process(ckdev,
+ ckdev->ec->event_data.data.key_matrix,
+ ckdev->ec->event_size);
+ break;
+
+ case EC_MKBP_EVENT_BUTTON:
+ case EC_MKBP_EVENT_SWITCH:
+ /*
+ * If EC is not the wake source, discard key state
+ * changes during suspend. Switches will be re-checked in
+ * cros_ec_keyb_resume() to be sure nothing is lost.
+ */
+ if (queued_during_suspend)
+ return NOTIFY_OK;
+
+ if (ckdev->ec->event_data.event_type == EC_MKBP_EVENT_BUTTON) {
+ val = get_unaligned_le32(
+ &ckdev->ec->event_data.data.buttons);
+ ev_type = EV_KEY;
+ } else {
+ val = get_unaligned_le32(
+ &ckdev->ec->event_data.data.switches);
+ ev_type = EV_SW;
+ }
+ cros_ec_keyb_report_bs(ckdev, ev_type, val);
+ break;
+
+ default:
return NOTIFY_DONE;
- /*
- * If EC is not the wake source, discard key state changes during
- * suspend.
- */
- if (queued_during_suspend)
- return NOTIFY_OK;
- if (ckdev->ec->event_size != ckdev->cols) {
- dev_err(ckdev->dev,
- "Discarded incomplete key matrix event.\n");
- return NOTIFY_OK;
}
- cros_ec_keyb_process(ckdev, ckdev->ec->event_data.data.key_matrix,
- ckdev->ec->event_size);
+
return NOTIFY_OK;
}
@@ -213,22 +313,228 @@ static void cros_ec_keyb_compute_valid_keys(struct cros_ec_keyb *ckdev)
}
}
-static int cros_ec_keyb_probe(struct platform_device *pdev)
+/**
+ * cros_ec_keyb_info - Wrap the EC command EC_CMD_MKBP_INFO
+ *
+ * This wraps the EC_CMD_MKBP_INFO, abstracting out all of the marshalling and
+ * unmarshalling and different version nonsense into something simple.
+ *
+ * @ec_dev: The EC device
+ * @info_type: Either EC_MKBP_INFO_SUPPORTED or EC_MKBP_INFO_CURRENT.
+ * @event_type: Either EC_MKBP_EVENT_BUTTON or EC_MKBP_EVENT_SWITCH. Actually
+ * in some cases this could be EC_MKBP_EVENT_KEY_MATRIX or
+ * EC_MKBP_EVENT_HOST_EVENT too but we don't use in this driver.
+ * @result: Where we'll store the result; a union
+ * @result_size: The size of the result. Expected to be the size of one of
+ * the elements in the union.
+ *
+ * Returns 0 if no error or -error upon error.
+ */
+static int cros_ec_keyb_info(struct cros_ec_device *ec_dev,
+ enum ec_mkbp_info_type info_type,
+ enum ec_mkbp_event event_type,
+ union ec_response_get_next_data *result,
+ size_t result_size)
{
- struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
- struct device *dev = &pdev->dev;
- struct cros_ec_keyb *ckdev;
+ struct ec_params_mkbp_info *params;
+ struct cros_ec_command *msg;
+ int ret;
+
+ msg = kzalloc(sizeof(*msg) + max_t(size_t, result_size,
+ sizeof(*params)), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ msg->command = EC_CMD_MKBP_INFO;
+ msg->version = 1;
+ msg->outsize = sizeof(*params);
+ msg->insize = result_size;
+ params = (struct ec_params_mkbp_info *)msg->data;
+ params->info_type = info_type;
+ params->event_type = event_type;
+
+ ret = cros_ec_cmd_xfer(ec_dev, msg);
+ if (ret < 0) {
+ dev_warn(ec_dev->dev, "Transfer error %d/%d: %d\n",
+ (int)info_type, (int)event_type, ret);
+ } else if (msg->result == EC_RES_INVALID_VERSION) {
+ /* With older ECs we just return 0 for everything */
+ memset(result, 0, result_size);
+ ret = 0;
+ } else if (msg->result != EC_RES_SUCCESS) {
+ dev_warn(ec_dev->dev, "Error getting info %d/%d: %d\n",
+ (int)info_type, (int)event_type, msg->result);
+ ret = -EPROTO;
+ } else if (ret != result_size) {
+ dev_warn(ec_dev->dev, "Wrong size %d/%d: %d != %zu\n",
+ (int)info_type, (int)event_type,
+ ret, result_size);
+ ret = -EPROTO;
+ } else {
+ memcpy(result, msg->data, result_size);
+ ret = 0;
+ }
+
+ kfree(msg);
+
+ return ret;
+}
+
+/**
+ * cros_ec_keyb_query_switches - Query the state of switches and report
+ *
+ * This will ask the EC about the current state of switches and report to the
+ * kernel. Note that we don't query for buttons because they are more
+ * transitory and we'll get an update on the next release / press.
+ *
+ * @ckdev: The keyboard device
+ *
+ * Returns 0 if no error or -error upon error.
+ */
+static int cros_ec_keyb_query_switches(struct cros_ec_keyb *ckdev)
+{
+ struct cros_ec_device *ec_dev = ckdev->ec;
+ union ec_response_get_next_data event_data = {};
+ int ret;
+
+ ret = cros_ec_keyb_info(ec_dev, EC_MKBP_INFO_CURRENT,
+ EC_MKBP_EVENT_SWITCH, &event_data,
+ sizeof(event_data.switches));
+ if (ret)
+ return ret;
+
+ cros_ec_keyb_report_bs(ckdev, EV_SW,
+ get_unaligned_le32(&event_data.switches));
+
+ return 0;
+}
+
+/**
+ * cros_ec_keyb_resume - Resume the keyboard
+ *
+ * We use the resume notification as a chance to query the EC for switches.
+ *
+ * @dev: The keyboard device
+ *
+ * Returns 0 if no error or -error upon error.
+ */
+static __maybe_unused int cros_ec_keyb_resume(struct device *dev)
+{
+ struct cros_ec_keyb *ckdev = dev_get_drvdata(dev);
+
+ if (ckdev->bs_idev)
+ return cros_ec_keyb_query_switches(ckdev);
+
+ return 0;
+}
+
+/**
+ * cros_ec_keyb_register_bs - Register non-matrix buttons/switches
+ *
+ * Handles all the bits of the keyboard driver related to non-matrix buttons
+ * and switches, including asking the EC about which are present and telling
+ * the kernel to expect them.
+ *
+ * If this device has no support for buttons and switches we'll return no error
+ * but the ckdev->bs_idev will remain NULL when this function exits.
+ *
+ * @ckdev: The keyboard device
+ *
+ * Returns 0 if no error or -error upon error.
+ */
+static int cros_ec_keyb_register_bs(struct cros_ec_keyb *ckdev)
+{
+ struct cros_ec_device *ec_dev = ckdev->ec;
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drivers/mfd/Kconfig
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drivers/mfd/Makefile
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drivers/mfd/ab8500-core.c
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drivers/mfd/ab8500-sysctrl.c
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drivers/mfd/arizona-irq.c
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drivers/mfd/arizona.h
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drivers/mfd/axp20x.c
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drivers/mfd/cros_ec.c
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drivers/mfd/intel-lpss-pci.c
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drivers/mfd/kempld-core.c
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drivers/mfd/lpc_ich.c
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drivers/mfd/max77686.c
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drivers/mfd/motorola-cpcap.c
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drivers/mfd/mt6397-core.c
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drivers/mfd/rk808.c
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drivers/mfd/sun6i-prcm.c
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drivers/mfd/tps65912-i2c.c
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drivers/platform/chrome/cros_ec_proto.c
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include/linux/mfd/abx500.h
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include/linux/mfd/abx500/ab8500-bm.h
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include/linux/mfd/axp20x.h
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include/linux/mfd/cros_ec.h
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include/linux/mfd/cros_ec_commands.h
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include/linux/mfd/motorola-cpcap.h
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