[PATCH v3 0/3] media: rc: add support for IR receiver on MT7623 SoC

[PATCH v3 0/3] media: rc: add support for IR receiver on MT7623 SoC

[sean.wang]

From: Sean Wang <sean.wang@mediatek.com>

This patchset introduces consumer IR (CIR) support on MT7623 SoC 
that also works on other similar SoCs and implements raw mode for
more compatibility with different protocols. The driver simply
reports the duration of pulses and spaces to rc-core logic to
decode.

Changes since v1:
- change compatible string from "mediatek,mt7623-ir" into 
"mediatek,mt7623-cir"
- use KBUILD_MODNAME to provide consistent device name used in driver.
- remove unused fields in struct mtk_ir.
- use synchronize_irq to give protection between IRQ handler and 
remove handler.
- use devm_rc_allocate_device based on Andi Shyti's work.
- simplify error handling patch with devm_rc_register_device and devm_rc_allocate_device.
- remove unused spinlock.
- add comments about hardware limitation and related workarounds.
- enhance the caculation of sampling period for easiler assigned specific 
value.
- refine git description.
- fix IR message handling between IR hardware and rc-core.

Changes since v2:
- remove extra rc_unregister_device to avoid double frees issue
since rc_unregister_device was used.
- enhance comments description
- remove redundant mtk irq disable/enable pair inside the IRQ handler
- move keymap table property document into a common place

Sean Wang (3):
  Documentation: devicetree: move shared property used by rc into a
    common place
  Documentation: devicetree: Add document bindings for mtk-cir
  media: rc: add driver for IR remote receiver on MT7623 SoC

 .../devicetree/bindings/media/gpio-ir-receiver.txt |   3 +-
 .../devicetree/bindings/media/hix5hd2-ir.txt       |   2 +-
 .../devicetree/bindings/media/mtk-cir.txt          |  23 ++
 Documentation/devicetree/bindings/media/rc.txt     | 116 ++++++++
 .../devicetree/bindings/media/sunxi-ir.txt         |   2 +-
 drivers/media/rc/Kconfig                           |  11 +
 drivers/media/rc/Makefile                          |   1 +
 drivers/media/rc/mtk-cir.c                         | 330 +++++++++++++++++++++
 8 files changed, 485 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/mtk-cir.txt
 create mode 100644 Documentation/devicetree/bindings/media/rc.txt
 create mode 100644 drivers/media/rc/mtk-cir.c

-- 
1.9.1

[PATCH v3 1/3] Documentation: devicetree: move shared property used by rc into a common place

[sean.wang]

From: Sean Wang <sean.wang@mediatek.com>

Most IR drivers uses the same label to identify the
scancdoe/key table they used by multiple bindings and lack
explanation well. So move the shared property into a common
place and give better explanation.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 .../devicetree/bindings/media/gpio-ir-receiver.txt |   3 +-
 .../devicetree/bindings/media/hix5hd2-ir.txt       |   2 +-
 Documentation/devicetree/bindings/media/rc.txt     | 116 +++++++++++++++++++++
 .../devicetree/bindings/media/sunxi-ir.txt         |   2 +-
 4 files changed, 120 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/rc.txt

diff --git a/Documentation/devicetree/bindings/media/gpio-ir-receiver.txt b/Documentation/devicetree/bindings/media/gpio-ir-receiver.txt
index 56e726e..58261fb 100644
--- a/Documentation/devicetree/bindings/media/gpio-ir-receiver.txt
+++ b/Documentation/devicetree/bindings/media/gpio-ir-receiver.txt
@@ -5,7 +5,8 @@ Required properties:
 	- gpios: specifies GPIO used for IR signal reception.
 
 Optional properties:
-	- linux,rc-map-name: Linux specific remote control map name.
+	- linux,rc-map-name: see rc.txt file in the same
+	  directory.
 
 Example node:
 
diff --git a/Documentation/devicetree/bindings/media/hix5hd2-ir.txt b/Documentation/devicetree/bindings/media/hix5hd2-ir.txt
index 54e1bed..13ebc0f 100644
--- a/Documentation/devicetree/bindings/media/hix5hd2-ir.txt
+++ b/Documentation/devicetree/bindings/media/hix5hd2-ir.txt
@@ -10,7 +10,7 @@ Required properties:
 	- clocks: clock phandle and specifier pair.
 
 Optional properties:
-	- linux,rc-map-name : Remote control map name.
+	- linux,rc-map-name: see rc.txt file in the same directory.
 	- hisilicon,power-syscon: DEPRECATED. Don't use this in new dts files.
 		Provide correct clocks instead.
 
diff --git a/Documentation/devicetree/bindings/media/rc.txt b/Documentation/devicetree/bindings/media/rc.txt
new file mode 100644
index 0000000..0d16d14
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rc.txt
@@ -0,0 +1,116 @@
+The following properties are common to the infrared remote controllers:
+
+- linux,rc-map-name: string, specifies the scancode/key mapping table
+  defined in-kernel for the remote controller. Support values are:
+  * "rc-adstech-dvb-t-pci"
+  * "rc-alink-dtu-m"
+  * "rc-anysee"
+  * "rc-apac-viewcomp"
+  * "rc-asus-pc39"
+  * "rc-asus-ps3-100"
+  * "rc-ati-tv-wonder-hd-600"
+  * "rc-ati-x10"
+  * "rc-avermedia-a16d"
+  * "rc-avermedia-cardbus"
+  * "rc-avermedia-dvbt"
+  * "rc-avermedia-m135a"
+  * "rc-avermedia-m733a-rm-k6"
+  * "rc-avermedia-rm-ks"
+  * "rc-avermedia"
+  * "rc-avertv-303"
+  * "rc-azurewave-ad-tu700"
+  * "rc-behold-columbus"
+  * "rc-behold"
+  * "rc-budget-ci-old"
+  * "rc-cec"
+  * "rc-cinergy-1400"
+  * "rc-cinergy"
+  * "rc-delock-61959"
+  * "rc-dib0700-nec"
+  * "rc-dib0700-rc5"
+  * "rc-digitalnow-tinytwin"
+  * "rc-digittrade"
+  * "rc-dm1105-nec"
+  * "rc-dntv-live-dvbt-pro"
+  * "rc-dntv-live-dvb-t"
+  * "rc-dtt200u"
+  * "rc-dvbsky"
+  * "rc-empty"
+  * "rc-em-terratec"
+  * "rc-encore-enltv2"
+  * "rc-encore-enltv-fm53"
+  * "rc-encore-enltv"
+  * "rc-evga-indtube"
+  * "rc-eztv"
+  * "rc-flydvb"
+  * "rc-flyvideo"
+  * "rc-fusionhdtv-mce"
+  * "rc-gadmei-rm008z"
+  * "rc-genius-tvgo-a11mce"
+  * "rc-gotview7135"
+  * "rc-hauppauge"
+  * "rc-imon-mce"
+  * "rc-imon-pad"
+  * "rc-iodata-bctv7e"
+  * "rc-it913x-v1"
+  * "rc-it913x-v2"
+  * "rc-kaiomy"
+  * "rc-kworld-315u"
+  * "rc-kworld-pc150u"
+  * "rc-kworld-plus-tv-analog"
+  * "rc-leadtek-y04g0051"
+  * "rc-lirc"
+  * "rc-lme2510"
+  * "rc-manli"
+  * "rc-medion-x10"
+  * "rc-medion-x10-digitainer"
+  * "rc-medion-x10-or2x"
+  * "rc-msi-digivox-ii"
+  * "rc-msi-digivox-iii"
+  * "rc-msi-tvanywhere-plus"
+  * "rc-msi-tvanywhere"
+  * "rc-nebula"
+  * "rc-nec-terratec-cinergy-xs"
+  * "rc-norwood"
+  * "rc-npgtech"
+  * "rc-pctv-sedna"
+  * "rc-pinnacle-color"
+  * "rc-pinnacle-grey"
+  * "rc-pinnacle-pctv-hd"
+  * "rc-pixelview-new"
+  * "rc-pixelview"
+  * "rc-pixelview-002t"
+  * "rc-pixelview-mk12"
+  * "rc-powercolor-real-angel"
+  * "rc-proteus-2309"
+  * "rc-purpletv"
+  * "rc-pv951"
+  * "rc-hauppauge"
+  * "rc-rc5-tv"
+  * "rc-rc6-mce"
+  * "rc-real-audio-220-32-keys"
+  * "rc-reddo"
+  * "rc-snapstream-firefly"
+  * "rc-streamzap"
+  * "rc-tbs-nec"
+  * "rc-technisat-ts35"
+  * "rc-technisat-usb2"
+  * "rc-terratec-cinergy-c-pci"
+  * "rc-terratec-cinergy-s2-hd"
+  * "rc-terratec-cinergy-xs"
+  * "rc-terratec-slim"
+  * "rc-terratec-slim-2"
+  * "rc-tevii-nec"
+  * "rc-tivo"
+  * "rc-total-media-in-hand"
+  * "rc-total-media-in-hand-02"
+  * "rc-trekstor"
+  * "rc-tt-1500"
+  * "rc-twinhan-dtv-cab-ci"
+  * "rc-twinhan1027"
+  * "rc-videomate-k100"
+  * "rc-videomate-s350"
+  * "rc-videomate-tv-pvr"
+  * "rc-winfast"
+  * "rc-winfast-usbii-deluxe"
+  * "rc-su3000"
diff --git a/Documentation/devicetree/bindings/media/sunxi-ir.txt b/Documentation/devicetree/bindings/media/sunxi-ir.txt
index 1811a06..302a0b1 100644
--- a/Documentation/devicetree/bindings/media/sunxi-ir.txt
+++ b/Documentation/devicetree/bindings/media/sunxi-ir.txt
@@ -9,7 +9,7 @@ Required properties:
 - reg		    : should contain IO map address for IR.
 
 Optional properties:
-- linux,rc-map-name : Remote control map name.
+- linux,rc-map-name: see rc.txt file in the same directory.
 - resets : phandle + reset specifier pair
 
 Example:
-- 
1.9.1

[PATCH v3 2/3] Documentation: devicetree: Add document bindings for mtk-cir

[sean.wang]

From: Sean Wang <sean.wang@mediatek.com>

This patch adds documentation for devicetree bindings for
consumer Mediatek IR controller.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
 .../devicetree/bindings/media/mtk-cir.txt          | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/mtk-cir.txt

diff --git a/Documentation/devicetree/bindings/media/mtk-cir.txt b/Documentation/devicetree/bindings/media/mtk-cir.txt
new file mode 100644
index 0000000..2be2005
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/mtk-cir.txt
@@ -0,0 +1,24 @@
+Device-Tree bindings for Mediatek consumer IR controller
+found in Mediatek SoC family
+
+Required properties:
+- compatible	    : "mediatek,mt7623-cir"
+- clocks	    : list of clock specifiers, corresponding to
+		      entries in clock-names property;
+- clock-names	    : should contain "clk" entries;
+- interrupts	    : should contain IR IRQ number;
+- reg		    : should contain IO map address for IR.
+
+Optional properties:
+- linux,rc-map-name : see rc.txt file in the same directory.
+
+Example:
+
+cir: cir@10013000 {
+	compatible = "mediatek,mt7623-cir";
+	reg = <0 0x10013000 0 0x1000>;
+	interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_LOW>;
+	clocks = <&infracfg CLK_INFRA_IRRX>;
+	clock-names = "clk";
+	linux,rc-map-name = "rc-rc6-mce";
+};
-- 
1.9.1

[PATCH v3 3/3] media: rc: add driver for IR remote receiver on MT7623 SoC

[sean.wang]

From: Sean Wang <sean.wang@mediatek.com>

This patch adds driver for IR controller on MT7623 SoC.
and should also work on similar Mediatek SoC. Currently
testing successfully on NEC and SONY remote controller
only but it should work on others (lirc, rc-5 and rc-6).

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: Sean Young <sean@mess.org>
---
 drivers/media/rc/Kconfig   |  11 ++
 drivers/media/rc/Makefile  |   1 +
 drivers/media/rc/mtk-cir.c | 329 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 341 insertions(+)
 create mode 100644 drivers/media/rc/mtk-cir.c

diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 629e8ca..9228479 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -235,6 +235,17 @@ config IR_MESON
 	   To compile this driver as a module, choose M here: the
 	   module will be called meson-ir.
 
+config IR_MTK
+	tristate "Mediatek IR remote receiver"
+	depends on RC_CORE
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	---help---
+	   Say Y if you want to use the IR remote receiver available
+	   on Mediatek SoCs.
+
+	   To compile this driver as a module, choose M here: the
+	   module will be called mtk-cir.
+
 config IR_NUVOTON
 	tristate "Nuvoton w836x7hg Consumer Infrared Transceiver"
 	depends on PNP
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 3a984ee..a78570b 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -38,3 +38,4 @@ obj-$(CONFIG_RC_ST) += st_rc.o
 obj-$(CONFIG_IR_SUNXI) += sunxi-cir.o
 obj-$(CONFIG_IR_IMG) += img-ir/
 obj-$(CONFIG_IR_SERIAL) += serial_ir.o
+obj-$(CONFIG_IR_MTK) += mtk-cir.o
diff --git a/drivers/media/rc/mtk-cir.c b/drivers/media/rc/mtk-cir.c
new file mode 100644
index 0000000..fbe7fd9
--- /dev/null
+++ b/drivers/media/rc/mtk-cir.c
@@ -0,0 +1,329 @@
+/*
+ * Driver for Mediatek IR Receiver Controller
+ *
+ * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/reset.h>
+#include <media/rc-core.h>
+
+#define MTK_IR_DEV KBUILD_MODNAME
+
+/* Register to enable PWM and IR */
+#define MTK_CONFIG_HIGH_REG       0x0c
+/* Enable IR pulse width detection */
+#define MTK_PWM_EN		  BIT(13)
+/* Enable IR hardware function */
+#define MTK_IR_EN		  BIT(0)
+
+/* Register to setting sample period */
+#define MTK_CONFIG_LOW_REG        0x10
+/* Field to set sample period */
+#define CHK_PERIOD		  DIV_ROUND_CLOSEST(MTK_IR_SAMPLE,  \
+						    MTK_IR_CLK_PERIOD)
+#define MTK_CHK_PERIOD            (((CHK_PERIOD) << 8) & (GENMASK(20, 8)))
+#define MTK_CHK_PERIOD_MASK	  (GENMASK(20, 8))
+
+/* Register to clear state of state machine */
+#define MTK_IRCLR_REG             0x20
+/* Bit to restart IR receiving */
+#define MTK_IRCLR		  BIT(0)
+
+/* Register containing pulse width data */
+#define MTK_CHKDATA_REG(i)        (0x88 + 4 * (i))
+#define MTK_WIDTH_MASK		  (GENMASK(7, 0))
+
+/* Register to enable IR interrupt */
+#define MTK_IRINT_EN_REG          0xcc
+/* Bit to enable interrupt */
+#define MTK_IRINT_EN		  BIT(0)
+
+/* Register to ack IR interrupt */
+#define MTK_IRINT_CLR_REG         0xd0
+/* Bit to clear interrupt status */
+#define MTK_IRINT_CLR		  BIT(0)
+
+/* Maximum count of samples */
+#define MTK_MAX_SAMPLES		  0xff
+/* Indicate the end of IR message */
+#define MTK_IR_END(v, p)	  ((v) == MTK_MAX_SAMPLES && (p) == 0)
+/* Number of registers to record the pulse width */
+#define MTK_CHKDATA_SZ		  17
+/* Source clock frequency */
+#define MTK_IR_BASE_CLK		  273000000
+/* Frequency after IR internal divider */
+#define MTK_IR_CLK_FREQ		  (MTK_IR_BASE_CLK / 4)
+/* Period for MTK_IR_CLK in ns*/
+#define MTK_IR_CLK_PERIOD	  DIV_ROUND_CLOSEST(1000000000ul,  \
+						    MTK_IR_CLK_FREQ)
+/* Sample period in ns */
+#define MTK_IR_SAMPLE		  (MTK_IR_CLK_PERIOD * 0xc00)
+
+/* struct mtk_ir -	This is the main datasructure for holding the state
+ *			of the driver
+ * @dev:		The device pointer
+ * @rc:			The rc instrance
+ * @irq:		The IRQ that we are using
+ * @base:		The mapped register i/o base
+ * @clk:		The clock that we are using
+ */
+struct mtk_ir {
+	struct device	*dev;
+	struct rc_dev	*rc;
+	void __iomem	*base;
+	int		irq;
+	struct clk	*clk;
+};
+
+static void mtk_w32_mask(struct mtk_ir *ir, u32 val, u32 mask, unsigned int reg)
+{
+	u32 tmp;
+
+	tmp = __raw_readl(ir->base + reg);
+	tmp = (tmp & ~mask) | val;
+	__raw_writel(tmp, ir->base + reg);
+}
+
+static void mtk_w32(struct mtk_ir *ir, u32 val, unsigned int reg)
+{
+	__raw_writel(val, ir->base + reg);
+}
+
+static u32 mtk_r32(struct mtk_ir *ir, unsigned int reg)
+{
+	return __raw_readl(ir->base + reg);
+}
+
+static inline void mtk_irq_disable(struct mtk_ir *ir, u32 mask)
+{
+	u32 val;
+
+	val = mtk_r32(ir, MTK_IRINT_EN_REG);
+	mtk_w32(ir, val & ~mask, MTK_IRINT_EN_REG);
+}
+
+static inline void mtk_irq_enable(struct mtk_ir *ir, u32 mask)
+{
+	u32 val;
+
+	val = mtk_r32(ir, MTK_IRINT_EN_REG);
+	mtk_w32(ir, val | mask, MTK_IRINT_EN_REG);
+}
+
+static irqreturn_t mtk_ir_irq(int irqno, void *dev_id)
+{
+	struct mtk_ir *ir = dev_id;
+	u8  wid = 0;
+	u32 i, j, val;
+	DEFINE_IR_RAW_EVENT(rawir);
+
+	/* Reset decoder state machine explicitly is required
+	 * because 1) the longest duration for space MTK IR hardware
+	 * could record is not safely long. e.g  12ms if rx resolution
+	 * is 46us by default. There is still the risk to satisfying
+	 * every decoder to reset themselves through long enough
+	 * trailing spaces and 2) the IRQ handler guarantees that
+	 * start of IR message is always contained in and starting
+	 * from register MTK_CHKDATA_REG(0).
+	 */
+	ir_raw_event_reset(ir->rc);
+
+	/* First message must be pulse */
+	rawir.pulse = false;
+
+	/* Handle all pulse and space IR controller captures */
+	for (i = 0 ; i < MTK_CHKDATA_SZ ; i++) {
+		val = mtk_r32(ir, MTK_CHKDATA_REG(i));
+		dev_dbg(ir->dev, "@reg%d=0x%08x\n", i, val);
+
+		for (j = 0 ; j < 4 ; j++) {
+			wid = (val & (MTK_WIDTH_MASK << j * 8)) >> j * 8;
+			rawir.pulse = !rawir.pulse;
+			rawir.duration = wid * (MTK_IR_SAMPLE + 1);
+			ir_raw_event_store_with_filter(ir->rc, &rawir);
+		}
+	}
+
+	/* The maximum number of edges the IR controller can
+	 * hold is MTK_CHKDATA_SZ * 4. So if received IR messages
+	 * is over the limit, the last incomplete IR message would
+	 * be appended trailing space and still would be sent into
+	 * ir-rc-raw to decode. That helps it is possible that it
+	 * has enough information to decode a scancode even if the
+	 * trailing end of the message is missing.
+	 */
+	if (!MTK_IR_END(wid, rawir.pulse)) {
+		rawir.pulse = false;
+		rawir.duration = MTK_MAX_SAMPLES * (MTK_IR_SAMPLE + 1);
+		ir_raw_event_store_with_filter(ir->rc, &rawir);
+	}
+
+	ir_raw_event_handle(ir->rc);
+
+	/* Restart controller for the next receive that would
+	 * clear up all CHKDATA registers
+	 */
+	mtk_w32_mask(ir, 0x1, MTK_IRCLR, MTK_IRCLR_REG);
+
+	/* Clear interrupt status */
+	mtk_w32_mask(ir, 0x1, MTK_IRINT_CLR, MTK_IRINT_CLR_REG);
+
+	return IRQ_HANDLED;
+}
+
+static int mtk_ir_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *dn = dev->of_node;
+	struct resource *res;
+	struct mtk_ir *ir;
+	u32 val;
+	int ret = 0;
+	const char *map_name;
+
+	ir = devm_kzalloc(dev, sizeof(struct mtk_ir), GFP_KERNEL);
+	if (!ir)
+		return -ENOMEM;
+
+	ir->dev = dev;
+
+	if (!of_device_is_compatible(dn, "mediatek,mt7623-cir"))
+		return -ENODEV;
+
+	ir->clk = devm_clk_get(dev, "clk");
+	if (IS_ERR(ir->clk)) {
+		dev_err(dev, "failed to get a ir clock.\n");
+		return PTR_ERR(ir->clk);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ir->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ir->base)) {
+		dev_err(dev, "failed to map registers\n");
+		return PTR_ERR(ir->base);
+	}
+
+	ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
+	if (!ir->rc) {
+		dev_err(dev, "failed to allocate device\n");
+		return -ENOMEM;
+	}
+
+	ir->rc->priv = ir;
+	ir->rc->input_name = MTK_IR_DEV;
+	ir->rc->input_phys = MTK_IR_DEV "/input0";
+	ir->rc->input_id.bustype = BUS_HOST;
+	ir->rc->input_id.vendor = 0x0001;
+	ir->rc->input_id.product = 0x0001;
+	ir->rc->input_id.version = 0x0001;
+	map_name = of_get_property(dn, "linux,rc-map-name", NULL);
+	ir->rc->map_name = map_name ?: RC_MAP_EMPTY;
+	ir->rc->dev.parent = dev;
+	ir->rc->driver_name = MTK_IR_DEV;
+	ir->rc->allowed_protocols = RC_BIT_ALL;
+	ir->rc->rx_resolution = MTK_IR_SAMPLE;
+	ir->rc->timeout = MTK_MAX_SAMPLES * (MTK_IR_SAMPLE + 1);
+
+	ret = devm_rc_register_device(dev, ir->rc);
+	if (ret) {
+		dev_err(dev, "failed to register rc device\n");
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, ir);
+
+	ir->irq = platform_get_irq(pdev, 0);
+	if (ir->irq < 0) {
+		dev_err(dev, "no irq resource\n");
+		return -ENODEV;
+	}
+
+	/* Enable interrupt after proper hardware
+	 * setup and IRQ handler registration
+	 */
+	if (clk_prepare_enable(ir->clk)) {
+		dev_err(dev, "try to enable ir_clk failed\n");
+		ret = -EINVAL;
+		goto exit_clkdisable_clk;
+	}
+
+	mtk_irq_disable(ir, MTK_IRINT_EN);
+
+	ret = devm_request_irq(dev, ir->irq, mtk_ir_irq, 0, MTK_IR_DEV, ir);
+	if (ret) {
+		dev_err(dev, "failed request irq\n");
+		goto exit_clkdisable_clk;
+	}
+
+	/* Enable IR and PWM */
+	val = mtk_r32(ir, MTK_CONFIG_HIGH_REG);
+	val |= MTK_PWM_EN | MTK_IR_EN;
+	mtk_w32(ir, val, MTK_CONFIG_HIGH_REG);
+
+	/* Setting sample period */
+	mtk_w32_mask(ir, MTK_CHK_PERIOD, MTK_CHK_PERIOD_MASK,
+		     MTK_CONFIG_LOW_REG);
+
+	mtk_irq_enable(ir, MTK_IRINT_EN);
+
+	dev_info(dev, "Initialized MT7623 IR driver, sample period = %luus\n",
+		 DIV_ROUND_CLOSEST(MTK_IR_SAMPLE, 1000));
+
+	return 0;
+
+exit_clkdisable_clk:
+	clk_disable_unprepare(ir->clk);
+
+	return ret;
+}
+
+static int mtk_ir_remove(struct platform_device *pdev)
+{
+	struct mtk_ir *ir = platform_get_drvdata(pdev);
+
+	/* Avoid contention between remove handler and
+	 * IRQ handler so that disabling IR interrupt and
+	 * waiting for pending IRQ handler to complete
+	 */
+	mtk_irq_disable(ir, MTK_IRINT_EN);
+	synchronize_irq(ir->irq);
+
+	clk_disable_unprepare(ir->clk);
+
+	return 0;
+}
+
+static const struct of_device_id mtk_ir_match[] = {
+	{ .compatible = "mediatek,mt7623-cir" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_ir_match);
+
+static struct platform_driver mtk_ir_driver = {
+	.probe          = mtk_ir_probe,
+	.remove         = mtk_ir_remove,
+	.driver = {
+		.name = MTK_IR_DEV,
+		.of_match_table = mtk_ir_match,
+	},
+};
+
+module_platform_driver(mtk_ir_driver);
+
+MODULE_DESCRIPTION("Mediatek IR Receiver Controller Driver");
+MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
+MODULE_LICENSE("GPL");
-- 
1.9.1

Re: [PATCH v3 1/3] Documentation: devicetree: move shared property used by rc into a common place

[Rob Herring]

On Fri, Jan 13, 2017 at 03:35:37PM +0800, sean.wang@mediatek.com wrote:
> From: Sean Wang <sean.wang@mediatek.com>
> 
> Most IR drivers uses the same label to identify the
> scancdoe/key table they used by multiple bindings and lack
> explanation well. So move the shared property into a common
> place and give better explanation.
> 
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> ---
>  .../devicetree/bindings/media/gpio-ir-receiver.txt |   3 +-
>  .../devicetree/bindings/media/hix5hd2-ir.txt       |   2 +-
>  Documentation/devicetree/bindings/media/rc.txt     | 116 +++++++++++++++++++++
>  .../devicetree/bindings/media/sunxi-ir.txt         |   2 +-
>  4 files changed, 120 insertions(+), 3 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/media/rc.txt

Acked-by: Rob Herring <robh@kernel.org>

Thanks for doing this.

Rob

Re: [PATCH v3 2/3] Documentation: devicetree: Add document bindings for mtk-cir

[Rob Herring]

On Fri, Jan 13, 2017 at 03:35:38PM +0800, sean.wang@mediatek.com wrote:
> From: Sean Wang <sean.wang@mediatek.com>
> 
> This patch adds documentation for devicetree bindings for
> consumer Mediatek IR controller.
> 
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> ---
>  .../devicetree/bindings/media/mtk-cir.txt          | 24 ++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/mtk-cir.txt

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v3 2/3] Documentation: devicetree: Add document bindings for mtk-cir

[Rob Herring]

On Wed, Jan 18, 2017 at 4:23 PM, Rob Herring <robh@kernel.org> wrote:
> On Fri, Jan 13, 2017 at 03:35:38PM +0800, sean.wang@mediatek.com wrote:
>> From: Sean Wang <sean.wang@mediatek.com>
>>
>> This patch adds documentation for devicetree bindings for
>> consumer Mediatek IR controller.
>>
>> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
>> ---
>>  .../devicetree/bindings/media/mtk-cir.txt          | 24 ++++++++++++++++++++++
>>  1 file changed, 24 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/media/mtk-cir.txt
>
> Acked-by: Rob Herring <robh@kernel.org>

I guess I rescind my ack if this email doesn't work:

"The response from the remote server was:

550 Relaying mail to sean.wang@mediatek.com is not allowed"

Re: [PATCH v3 2/3] Documentation: devicetree: Add document bindings for mtk-cir

[Sean Wang]

On Wed, 2017-01-18 at 16:42 -0600, Rob Herring wrote:
> On Wed, Jan 18, 2017 at 4:23 PM, Rob Herring <robh@kernel.org> wrote:
> > On Fri, Jan 13, 2017 at 03:35:38PM +0800, sean.wang@mediatek.com wrote:
> >> From: Sean Wang <sean.wang@mediatek.com>
> >>
> >> This patch adds documentation for devicetree bindings for
> >> consumer Mediatek IR controller.
> >>
> >> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> >> ---
> >>  .../devicetree/bindings/media/mtk-cir.txt          | 24 ++++++++++++++++++++++
> >>  1 file changed, 24 insertions(+)
> >>  create mode 100644 Documentation/devicetree/bindings/media/mtk-cir.txt
> >
> > Acked-by: Rob Herring <robh@kernel.org>
> 
> I guess I rescind my ack if this email doesn't work:
> 
> "The response from the remote server was:
> 
> 550 Relaying mail to sean.wang@mediatek.com is not allowed"


sorry for causing you inconvenience.

it should be able to work because i almost use this daily
maybe that's just a sudden problem from internal server (?) 

but if the problem still continues, please let me know and 
i will try to fix this.

Re: [PATCH v3 3/3] media: rc: add driver for IR remote receiver on MT7623 SoC

[kbuild test robot]

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Hi Sean,

[auto build test ERROR on robh/for-next]
[also build test ERROR on v4.10-rc4 next-20170120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/sean-wang-mediatek-com/Documentation-devicetree-move-shared-property-used-by-rc-into-a-common-place/20170115-052257
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: sparc64-allyesconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sparc64 

All errors (new ones prefixed by >>):

   drivers/media/rc/mtk-cir.c: In function 'mtk_ir_probe':
>> drivers/media/rc/mtk-cir.c:220:11: error: too many arguments to function 'devm_rc_allocate_device'
     ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
              ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/media/rc/mtk-cir.c:22:0:
   include/media/rc-core.h:213:16: note: declared here
    struct rc_dev *devm_rc_allocate_device(struct device *dev);
                   ^~~~~~~~~~~~~~~~~~~~~~~

vim +/devm_rc_allocate_device +220 drivers/media/rc/mtk-cir.c

   214		ir->base = devm_ioremap_resource(dev, res);
   215		if (IS_ERR(ir->base)) {
   216			dev_err(dev, "failed to map registers\n");
   217			return PTR_ERR(ir->base);
   218		}
   219	
 > 220		ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
   221		if (!ir->rc) {
   222			dev_err(dev, "failed to allocate device\n");
   223			return -ENOMEM;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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