* [PATCH v7] Add matrix keypad driver support for Mediatek SoCs
@ 2020-05-14 6:17 Fengping Yu
[not found] ` <20200514061747.25466-4-fengping.yu@mediatek.com>
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Fengping Yu @ 2020-05-14 6:17 UTC (permalink / raw)
To: Yingjoe Chen, Dmitry Torokhov, Andy Shevchenko, Marco Felsch
Cc: linux-arm-kernel, linux-mediatek, linux-kernel
Change since v6:
- update keypad device tree document schema
fengping.yu (3):
dt-bindings: Add keypad devicetree documentation
drivers: input: keyboard: Add mtk keypad driver
configs: defconfig: Add CONFIG_KEYBOARD_MTK_KPD=y
.../devicetree/bindings/input/mtk-kpd.yaml | 102 ++++++++
arch/arm64/configs/defconfig | 2 +
drivers/input/keyboard/Kconfig | 8 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/mtk-kpd.c | 223 ++++++++++++++++++
5 files changed, 336 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.yaml
create mode 100644 drivers/input/keyboard/mtk-kpd.c
--
2.18.0
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v7 3/3] configs: defconfig: Add CONFIG_KEYBOARD_MTK_KPD=y
[not found] ` <20200514061747.25466-4-fengping.yu@mediatek.com>
@ 2020-05-14 8:56 ` Marco Felsch
0 siblings, 0 replies; 7+ messages in thread
From: Marco Felsch @ 2020-05-14 8:56 UTC (permalink / raw)
To: Fengping Yu
Cc: Yingjoe Chen, Dmitry Torokhov, Andy Shevchenko, linux-arm-kernel,
linux-mediatek, linux-kernel
Hi,
On 20-05-14 14:17, Fengping Yu wrote:
> From: "fengping.yu" <fengping.yu@mediatek.com>
>
> Add Mediatek matrix keypad support in defconfig.
>
> Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
> ---
> arch/arm64/configs/defconfig | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 24e534d85045..f9f0fb489182 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -349,6 +349,8 @@ CONFIG_KEYBOARD_GPIO=y
> CONFIG_KEYBOARD_SNVS_PWRKEY=m
> CONFIG_KEYBOARD_IMX_SC_KEY=m
> CONFIG_KEYBOARD_CROS_EC=y
> +CONFIG_KEYBOARD_MTK_KPD=y
Why not as module?
> +# CONFIG_KEYBOARD_MTK_PMIC is not set
Also this is a unrelated add.
Regards,
Marco
> CONFIG_INPUT_TOUCHSCREEN=y
> CONFIG_TOUCHSCREEN_ATMEL_MXT=m
> CONFIG_INPUT_MISC=y
> --
> 2.18.0
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v7 2/3] drivers: input: keyboard: Add mtk keypad driver
[not found] ` <20200514061747.25466-3-fengping.yu@mediatek.com>
@ 2020-05-14 9:24 ` Marco Felsch
2020-05-14 10:27 ` Andy Shevchenko
1 sibling, 0 replies; 7+ messages in thread
From: Marco Felsch @ 2020-05-14 9:24 UTC (permalink / raw)
To: Fengping Yu
Cc: Yingjoe Chen, Dmitry Torokhov, Andy Shevchenko, linux-arm-kernel,
linux-mediatek, linux-kernel
Hi,
I like the evolution of this patch =)
On 20-05-14 14:17, Fengping Yu wrote:
> From: "fengping.yu" <fengping.yu@mediatek.com>
>
> This adds matrix keypad support for Mediatek SoCs.
>
> Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
> ---
> drivers/input/keyboard/Kconfig | 8 ++
> drivers/input/keyboard/Makefile | 1 +
> drivers/input/keyboard/mtk-kpd.c | 223 +++++++++++++++++++++++++++++++
> 3 files changed, 232 insertions(+)
> create mode 100644 drivers/input/keyboard/mtk-kpd.c
>
> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
> index 28de965a08d5..6bae95a5f90b 100644
> --- a/drivers/input/keyboard/Kconfig
> +++ b/drivers/input/keyboard/Kconfig
> @@ -782,6 +782,14 @@ config KEYBOARD_BCM
> To compile this driver as a module, choose M here: the
> module will be called bcm-keypad.
>
> +config KEYBOARD_MTK_KPD
> + tristate "MediaTek Keypad Support"
> + depends on OF && HAVE_CLK
> + help
> + Say Y here if you want to use the keypad on MediaTek SoCs.
> + If unsure, say N.
> + To compile this driver as a module, choose M here: the
> + module will be called mtk-kpd.
> config KEYBOARD_MTK_PMIC
> tristate "MediaTek PMIC keys support"
> depends on MFD_MT6397
> diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
> index 1d689fdd5c00..6c9d852c377e 100644
> --- a/drivers/input/keyboard/Makefile
> +++ b/drivers/input/keyboard/Makefile
> @@ -43,6 +43,7 @@ obj-$(CONFIG_KEYBOARD_MATRIX) += matrix_keypad.o
> obj-$(CONFIG_KEYBOARD_MAX7359) += max7359_keypad.o
> obj-$(CONFIG_KEYBOARD_MCS) += mcs_touchkey.o
> obj-$(CONFIG_KEYBOARD_MPR121) += mpr121_touchkey.o
> +obj-$(CONFIG_KEYBOARD_MTK_KPD) += mtk-kpd.o
> obj-$(CONFIG_KEYBOARD_MTK_PMIC) += mtk-pmic-keys.o
> obj-$(CONFIG_KEYBOARD_NEWTON) += newtonkbd.o
> obj-$(CONFIG_KEYBOARD_NOMADIK) += nomadik-ske-keypad.o
> diff --git a/drivers/input/keyboard/mtk-kpd.c b/drivers/input/keyboard/mtk-kpd.c
> new file mode 100644
> index 000000000000..a538f89d6696
> --- /dev/null
> +++ b/drivers/input/keyboard/mtk-kpd.c
> @@ -0,0 +1,223 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2019 MediaTek Inc.
> + * Author Terry Chang <terry.chang@mediatek.com>
> + */
> +#include <linux/clk.h>
> +#include <linux/input/matrix_keypad.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/property.h>
> +#include <linux/pinctrl/consumer.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/bitops.h>
Please sort it alphabetical.
> +#define KPD_NAME "mtk-kpd"
> +
> +#define KP_MEM 0x0004
> +#define KP_DEBOUNCE 0x0018
> +
> +#define KPD_DEBOUNCE_MASK GENMASK(13, 0)
> +#define KPD_DEBOUNCE_MAX_US 256000 /*256ms */
> +#define KPD_NUM_MEMS 5
> +#define KPD_NUM_BITS 136 /* 4 * 32 + 8 MEM5 only use 8 BITS */
Pls align all define values. Nit, I would also make the names a bit more
uniform e.g.
- MTK_KPD_NAME
- MTK_KPD_MEM
- MTK_KPD_DEBOUNCE
- MTK_KPD_NUM_MEMS
...
> +struct mtk_keypad {
> + struct regmap *regmap;
> + struct input_dev *input_dev;
> + struct clk *clk;
> + void __iomem *base;
> + bool wakeup;
> + u32 n_rows;
> + u32 n_cols;
> + DECLARE_BITMAP(keymap_state, KPD_NUM_BITS);
> +};
> +
> +static const struct regmap_config keypad_regmap_cfg = {
> + .reg_bits = 32,
> + .val_bits = 32,
> + .reg_stride = sizeof(u32),
> + .max_register = 0x0024,
IMHO we should specify max_register as decimal value.
> +};
> +
> +static irqreturn_t kpd_irq_handler(int irq, void *dev_id)
> +{
> + struct mtk_keypad *keypad = dev_id;
> + unsigned short *keycode = keypad->input_dev->keycode;
> + DECLARE_BITMAP(new_state, KPD_NUM_BITS);
> + DECLARE_BITMAP(change, KPD_NUM_BITS);
> + int bit_nr;
> + int pressed;
> + unsigned short code;
> +
> + regmap_raw_read(keypad->regmap, KP_MEM, new_state, KPD_NUM_MEMS);
> +
> + bitmap_xor(change, new_state, keypad->keymap_state, KPD_NUM_BITS);
> +
> + for_each_set_bit(bit_nr, change, KPD_NUM_BITS) {
> + /* 1: not pressed, 0: pressed */
> + pressed = !test_bit(bit_nr, new_state);
> + dev_dbg(&keypad->input_dev->dev, "%s",
> + pressed ? "pressed" : "released");
> +
> + /* 32bit register only use low 16bit as keypad mem register */
> + code = keycode[bit_nr - 16 * (BITS_TO_U32(bit_nr) - 1)];
> +
> + input_report_key(keypad->input_dev, code, pressed);
> + input_sync(keypad->input_dev);
> +
> + dev_dbg(&keypad->input_dev->dev,
> + "report Linux keycode = %d\n", code);
> + }
> +
> + bitmap_copy(keypad->keymap_state, new_state, KPD_NUM_BITS);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int kpd_pdrv_probe(struct platform_device *pdev)
> +{
> + struct mtk_keypad *keypad;
> + struct pinctrl *keypad_pinctrl;
> + struct pinctrl_state *kpd_default;
> + unsigned int irqnr;
> + u32 debounce;
> + int ret;
> +
> + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
> + if (!keypad)
> + return -ENOMEM;
Missing newline ?
> + keypad->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(keypad->base))
> + return PTR_ERR(keypad->base);
> +
> + keypad->regmap = devm_regmap_init_mmio_clk(&pdev->dev, NULL,
> + keypad->base, &keypad_regmap_cfg);
Pls align it and make use of devm_regmap_init_mmio().
> + if (IS_ERR(keypad->regmap)) {
> + dev_err(&pdev->dev,
> + "regmap init failed:%ld\n", PTR_ERR(keypad->regmap));
> + return PTR_ERR(keypad->regmap);
> + }
> +
> + bitmap_fill(keypad->keymap_state, KPD_NUM_BITS);
> +
> + keypad->input_dev = devm_input_allocate_device(&pdev->dev);
> + if (!keypad->input_dev) {
> + dev_err(&pdev->dev, "Failed to allocate input dev\n");
> + return -ENOMEM;
> + }
> +
> + keypad->input_dev->name = KPD_NAME;
> + keypad->input_dev->id.bustype = BUS_HOST;
> +
> + ret = matrix_keypad_parse_properties(&pdev->dev, &keypad->n_rows,
> + &keypad->n_cols);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to parse keypad params\n");
> + return ret;
> + }
> +
> + ret = device_property_read_u32(&pdev->dev, "mediatek,debounce-us",
> + &debounce);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to read mediatek debounce time\n");
> + return ret;
> + }
Nit, I would make it optional and use a default if no value is
specified.
> +
> + if (debounce > KPD_DEBOUNCE_MAX_US) {
> + dev_err(&pdev->dev, "Debounce time exceeds the maximum allowed time 256ms\n");
> + return -EINVAL;
> + }
> +
> + keypad->wakeup = device_property_read_bool(&pdev->dev, "wakeup-source");
> +
> + dev_dbg(&pdev->dev, "n_row=%d n_col=%d debounce=%d\n",
> + keypad->n_rows, keypad->n_cols, debounce);
> +
> + ret = matrix_keypad_build_keymap(NULL, NULL,
> + keypad->n_rows,
> + keypad->n_cols,
> + NULL,
> + keypad->input_dev);
Pls align it correctly.
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to build keymap\n");
> + return ret;
> + }
> +
> + input_set_drvdata(keypad->input_dev, keypad);
> +
> + regmap_write(keypad->regmap, KP_DEBOUNCE,
> + debounce * 32 / 1000 & KPD_DEBOUNCE_MASK);
Pls align this also.
> +
> + keypad->clk = devm_clk_get(&pdev->dev, "kpd");
> + if (IS_ERR(keypad->clk)) {
> + return PTR_ERR(keypad->clk);
> + }
Not needed braces.
> +
> + ret = clk_prepare_enable(keypad->clk);
> + if (ret) {
> + dev_err(&pdev->dev, "cannot prepare/enable keypad clock\n");
> + return ret;
> + }
> +
> + devm_add_action_or_reset(&pdev->dev,
> + (void (*)(void *))clk_disable_unprepare,
> + keypad->clk);
Pls don't do that and instead add a internal driver function.
> +
> + keypad_pinctrl = devm_pinctrl_get(&pdev->dev);
> + if (IS_ERR(keypad_pinctrl)) {
> + return PTR_ERR(keypad_pinctrl);
> + }
Not needed braces.
> +
> + kpd_default = pinctrl_lookup_state(keypad_pinctrl, "default");
> + if (IS_ERR(kpd_default)) {
> + dev_err(&pdev->dev, "No default pinctrl state\n");
> + return PTR_ERR(kpd_default);
> + }
> +
> + pinctrl_select_state(keypad_pinctrl, kpd_default);
> +
> + irqnr = platform_get_irq(pdev, 0);
> + if (irqnr < 0) {
> + dev_err(&pdev->dev, "Failed to get irq\n");
> + return -irqnr;
> + }
> +
> + ret = devm_request_threaded_irq(&pdev->dev, irqnr,
> + NULL, kpd_irq_handler, 0,
> + KPD_NAME, keypad);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to request IRQ#%d:%d\n",
> + irqnr, ret);
> + return ret;
> + }
> +
> + ret = input_register_device(keypad->input_dev);
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to register device\n");
> + return ret;
> + }
> +
> + device_init_wakeup(&pdev->dev, keypad->wakeup);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id kpd_of_match[] = {
> + {.compatible = "mediatek,kp"},
I would also add the specific compatible which you list in the
dt-bindings patch.
> + {/*sentinel*/}
> +};
> +
> +static struct platform_driver kpd_pdrv = {
> + .probe = kpd_pdrv_probe,
> + .driver = {
> + .name = KPD_NAME,
> + .of_match_table = kpd_of_match,
> + },
> +};
> +module_platform_driver(kpd_pdrv);
> +
> +MODULE_AUTHOR("Mediatek Corporation");
> +MODULE_DESCRIPTION("MTK Keypad (KPD) Driver");
> +MODULE_LICENSE("GPL");
> --
> 2.18.0
Pls use checkpatch the next time, there are several style issues. Also
it is quite common to use a vendor prefix for funtions e.g.
mtk_kpd_probe() and mtk_kpd_irq_handler() but this is up to you.
Regards,
Marco
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v7 1/3] dt-bindings: Add keypad devicetree documentation
[not found] ` <20200514061747.25466-2-fengping.yu@mediatek.com>
@ 2020-05-14 9:31 ` Marco Felsch
2020-05-14 10:04 ` Matthias Brugger
1 sibling, 0 replies; 7+ messages in thread
From: Marco Felsch @ 2020-05-14 9:31 UTC (permalink / raw)
To: Fengping Yu
Cc: Yingjoe Chen, Dmitry Torokhov, Andy Shevchenko, linux-arm-kernel,
linux-mediatek, linux-kernel
Hi,
On 20-05-14 14:17, Fengping Yu wrote:
> From: "fengping.yu" <fengping.yu@mediatek.com>
>
> Add Mediatek matrix keypad dt-binding doc as yaml schema.
>
> Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
> ---
> .../devicetree/bindings/input/mtk-kpd.yaml | 102 ++++++++++++++++++
> 1 file changed, 102 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.yaml
>
> diff --git a/Documentation/devicetree/bindings/input/mtk-kpd.yaml b/Documentation/devicetree/bindings/input/mtk-kpd.yaml
> new file mode 100644
> index 000000000000..8f594fe0bfc2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/mtk-kpd.yaml
> @@ -0,0 +1,102 @@
> +%YAML 1.2
> +---
> +version: 1
> +
> +$id: http://devicetree.org/schemas/input/mtk-keypad.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek's Keypad Controller device tree bindings
> +
> +maintainer:
> + - Fengping Yu <fengping.yu@mediatek.com>
> +
> +description: |
> + Mediatek's Keypad controller is used to interface a SoC with a matrix-type
> + keypad device. The keypad controller supports multiple row and column lines.
> + A key can be placed at each intersection of a unique row and a unique column.
> + The keypad controller can sense a key-press and key-release and report the
> + event using a interrupt to the cpu.
> +
> +properties:
> + compatible:
> + constraint: |
enum or const ?
> + "mediatek,mt6779-keypad"
> + "mediatek, kp"
> +
> + clock-names:
> + description: Names of the clocks listed in clocks property in the same order
> +
> + clocks:
> + description: Must contain one entry, for the module clock
> + refs: devicetree/bindings/clocks/clock-bindings.txt for details.
> +
> + interrupts:
> + description: A single interrupt specifier
> +
> + linux,keymap:
> + description: The keymap for keys as described in the binding document
> + refs: devicetree/bindings/input/matrix-keymap.txt
> +
> + pinctrl-0:
> + description: Specify pin control groups used for this controller
> + refs: devicetree/bindings/pinctrl/pinctrl-bindings.txt
> +
> + pinctrl-names:
> + description: Names for optional pin modes
> +
> + reg:
> + description: The base address of the Keypad register bank
> +
> + wakeup-source:
> + description: use any event on keypad as wakeup event
> +
> + keypad,num-columns:
> + description: Number of column lines connected to the keypad controller,
> + it is not equal to PCB columns number, instead you should add required value
> + for each IC
> +
> + keypad,num-rows:
> + description: Number of row lines connected to the keypad controller, it is
> + not equal to PCB rows number, instead you should add required value for each IC
> +
> + mediatek,debounce-us:
> + description: Debounce interval in microseconds
> + maximum: 256000
I think that you are missing the maxItems on all your properties so we
can't make any validation. Also the indent looks wrong.
> +
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - mediatek,debounce-us
> + - keypad,num-rows
> + - keypad,num-columns
> + - linux,keymap
> + - pinctrl
> + - clocks
> + - clock-names
> +
> +optional:
> + - wakeup-source:
I think the optional can be dropped.
> +examples:
> + - |
> +
> + keypad: kp@10010000 {
> + compatible = "mediatek,kp";
> + reg = <0 0x10010000 0 0x1000>;
> + wakeup-source;
> + interrupts = <GIC_SPI 75 IRQ_TYPE_EDGE_FALLING>;
> + clocks = <&clk26m>;
> + clock-names = "kpd";
> + };
> +
> + &keypad {
> + mediatek,debounce-us = <32000>;
> + keypad,num-rows = <8>;
> + keypad,num-columns = <9>;
> + linux,keymap = < MATRIX_KEY(0x00, 0x00, KEY_VOLUMEDOWN) >;
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&kpd_gpios_def_cfg>;
> + };
Pls squash those nodes.
Regards,
Marco
> --
> 2.18.0
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v7 1/3] dt-bindings: Add keypad devicetree documentation
[not found] ` <20200514061747.25466-2-fengping.yu@mediatek.com>
2020-05-14 9:31 ` [PATCH v7 1/3] dt-bindings: Add keypad devicetree documentation Marco Felsch
@ 2020-05-14 10:04 ` Matthias Brugger
1 sibling, 0 replies; 7+ messages in thread
From: Matthias Brugger @ 2020-05-14 10:04 UTC (permalink / raw)
To: Fengping Yu, Yingjoe Chen, Dmitry Torokhov, Andy Shevchenko,
Marco Felsch
Cc: linux-mediatek, linux-kernel, linux-arm-kernel
On 14/05/2020 08:17, Fengping Yu wrote:
> From: "fengping.yu" <fengping.yu@mediatek.com>
>
> Add Mediatek matrix keypad dt-binding doc as yaml schema.
>
> Signed-off-by: fengping.yu <fengping.yu@mediatek.com>
> ---
> .../devicetree/bindings/input/mtk-kpd.yaml | 102 ++++++++++++++++++
> 1 file changed, 102 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.yaml
>
> diff --git a/Documentation/devicetree/bindings/input/mtk-kpd.yaml b/Documentation/devicetree/bindings/input/mtk-kpd.yaml
> new file mode 100644
> index 000000000000..8f594fe0bfc2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/mtk-kpd.yaml
> @@ -0,0 +1,102 @@
> +%YAML 1.2
> +---
> +version: 1
> +
> +$id: http://devicetree.org/schemas/input/mtk-keypad.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek's Keypad Controller device tree bindings
> +
> +maintainer:
> + - Fengping Yu <fengping.yu@mediatek.com>
> +
> +description: |
> + Mediatek's Keypad controller is used to interface a SoC with a matrix-type
> + keypad device. The keypad controller supports multiple row and column lines.
> + A key can be placed at each intersection of a unique row and a unique column.
> + The keypad controller can sense a key-press and key-release and report the
> + event using a interrupt to the cpu.
> +
> +properties:
> + compatible:
> + constraint: |
> + "mediatek,mt6779-keypad"
> + "mediatek, kp"
"mediatek, kp" is too generic. Are you aware that the keypad can be used by
other SoCs. Then we should add them later with a fallback to mt6779-keypad.
Regards,
Matthias
> +
> + clock-names:
> + description: Names of the clocks listed in clocks property in the same order
> +
> + clocks:
> + description: Must contain one entry, for the module clock
> + refs: devicetree/bindings/clocks/clock-bindings.txt for details.
> +
> + interrupts:
> + description: A single interrupt specifier
> +
> + linux,keymap:
> + description: The keymap for keys as described in the binding document
> + refs: devicetree/bindings/input/matrix-keymap.txt
> +
> + pinctrl-0:
> + description: Specify pin control groups used for this controller
> + refs: devicetree/bindings/pinctrl/pinctrl-bindings.txt
> +
> + pinctrl-names:
> + description: Names for optional pin modes
> +
> + reg:
> + description: The base address of the Keypad register bank
> +
> + wakeup-source:
> + description: use any event on keypad as wakeup event
> +
> + keypad,num-columns:
> + description: Number of column lines connected to the keypad controller,
> + it is not equal to PCB columns number, instead you should add required value
> + for each IC
> +
> + keypad,num-rows:
> + description: Number of row lines connected to the keypad controller, it is
> + not equal to PCB rows number, instead you should add required value for each IC
> +
> + mediatek,debounce-us:
> + description: Debounce interval in microseconds
> + maximum: 256000
> +
> +
> +required:
> + - compatible
> + - reg
> + - interrupts
> + - mediatek,debounce-us
> + - keypad,num-rows
> + - keypad,num-columns
> + - linux,keymap
> + - pinctrl
> + - clocks
> + - clock-names
> +
> +optional:
> + - wakeup-source:
> +
> +examples:
> + - |
> +
> + keypad: kp@10010000 {
> + compatible = "mediatek,kp";
> + reg = <0 0x10010000 0 0x1000>;
> + wakeup-source;
> + interrupts = <GIC_SPI 75 IRQ_TYPE_EDGE_FALLING>;
> + clocks = <&clk26m>;
> + clock-names = "kpd";
> + };
> +
> + &keypad {
> + mediatek,debounce-us = <32000>;
> + keypad,num-rows = <8>;
> + keypad,num-columns = <9>;
> + linux,keymap = < MATRIX_KEY(0x00, 0x00, KEY_VOLUMEDOWN) >;
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&kpd_gpios_def_cfg>;
> + };
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v7 2/3] drivers: input: keyboard: Add mtk keypad driver
[not found] ` <20200514061747.25466-3-fengping.yu@mediatek.com>
2020-05-14 9:24 ` [PATCH v7 2/3] drivers: input: keyboard: Add mtk keypad driver Marco Felsch
@ 2020-05-14 10:27 ` Andy Shevchenko
2020-05-14 10:30 ` Andy Shevchenko
1 sibling, 1 reply; 7+ messages in thread
From: Andy Shevchenko @ 2020-05-14 10:27 UTC (permalink / raw)
To: Fengping Yu
Cc: Yingjoe Chen, Dmitry Torokhov, Marco Felsch, linux-arm-kernel,
linux-mediatek, linux-kernel
On Thu, May 14, 2020 at 02:17:48PM +0800, Fengping Yu wrote:
> From: "fengping.yu" <fengping.yu@mediatek.com>
>
> This adds matrix keypad support for Mediatek SoCs.
...
> +config KEYBOARD_MTK_KPD
> + tristate "MediaTek Keypad Support"
> + depends on OF && HAVE_CLK
What makes it OF dependent?
> + help
> + Say Y here if you want to use the keypad on MediaTek SoCs.
> + If unsure, say N.
> + To compile this driver as a module, choose M here: the
> + module will be called mtk-kpd.
...
> +#define KPD_DEBOUNCE_MAX_US 256000 /*256ms */
Comment, besides missed space, is redundant. That's how we use unit suffixes in
the definitions.
...
> +static const struct regmap_config keypad_regmap_cfg = {
> + .reg_bits = 32,
> + .val_bits = 32,
> + .reg_stride = sizeof(u32),
> + .max_register = 0x0024,
Can it be definition?
> +};
...
> + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
> + if (!keypad)
> + return -ENOMEM;
+ blank line here.
> + keypad->base = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(keypad->base))
> + return PTR_ERR(keypad->base);
...
> + if (debounce > KPD_DEBOUNCE_MAX_US) {
> + dev_err(&pdev->dev, "Debounce time exceeds the maximum allowed time 256ms\n");
...%dus\n", KPD_DEBOUNCE_MAX_US);
or
...%dms\n", KPD_DEBOUNCE_MAX_US / USEC_PER_MSEC);
> + return -EINVAL;
> + }
...
> + keypad_pinctrl = devm_pinctrl_get(&pdev->dev);
> + if (IS_ERR(keypad_pinctrl)) {
> + return PTR_ERR(keypad_pinctrl);
> + }
Extra {}.
...
> + kpd_default = pinctrl_lookup_state(keypad_pinctrl, "default");
> + if (IS_ERR(kpd_default)) {
> + dev_err(&pdev->dev, "No default pinctrl state\n");
Isn't it done by pin control core?
> + return PTR_ERR(kpd_default);
> + }
> +
> + pinctrl_select_state(keypad_pinctrl, kpd_default);
And basically entire part is duplicating device core part? (Look at dd.c)
...
> + irqnr = platform_get_irq(pdev, 0);
> + if (irqnr < 0) {
> + dev_err(&pdev->dev, "Failed to get irq\n");
This duplicates what platform core does.
> + return -irqnr;
- ?!
> + }
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH v7 2/3] drivers: input: keyboard: Add mtk keypad driver
2020-05-14 10:27 ` Andy Shevchenko
@ 2020-05-14 10:30 ` Andy Shevchenko
0 siblings, 0 replies; 7+ messages in thread
From: Andy Shevchenko @ 2020-05-14 10:30 UTC (permalink / raw)
To: Fengping Yu
Cc: Yingjoe Chen, Dmitry Torokhov, Marco Felsch, linux-arm-kernel,
linux-mediatek, linux-kernel
On Thu, May 14, 2020 at 01:27:01PM +0300, Andy Shevchenko wrote:
> On Thu, May 14, 2020 at 02:17:48PM +0800, Fengping Yu wrote:
> > From: "fengping.yu" <fengping.yu@mediatek.com>
> >
> > This adds matrix keypad support for Mediatek SoCs.
>
> ...
>
> > +config KEYBOARD_MTK_KPD
> > + tristate "MediaTek Keypad Support"
>
> > + depends on OF && HAVE_CLK
>
> What makes it OF dependent?
Actually you missed regmap dependencies or selection. I dunno which one should
be used (IIRC selection).
> > + help
> > + Say Y here if you want to use the keypad on MediaTek SoCs.
> > + If unsure, say N.
> > + To compile this driver as a module, choose M here: the
> > + module will be called mtk-kpd.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2020-05-14 10:30 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-14 6:17 [PATCH v7] Add matrix keypad driver support for Mediatek SoCs Fengping Yu
[not found] ` <20200514061747.25466-4-fengping.yu@mediatek.com>
2020-05-14 8:56 ` [PATCH v7 3/3] configs: defconfig: Add CONFIG_KEYBOARD_MTK_KPD=y Marco Felsch
[not found] ` <20200514061747.25466-3-fengping.yu@mediatek.com>
2020-05-14 9:24 ` [PATCH v7 2/3] drivers: input: keyboard: Add mtk keypad driver Marco Felsch
2020-05-14 10:27 ` Andy Shevchenko
2020-05-14 10:30 ` Andy Shevchenko
[not found] ` <20200514061747.25466-2-fengping.yu@mediatek.com>
2020-05-14 9:31 ` [PATCH v7 1/3] dt-bindings: Add keypad devicetree documentation Marco Felsch
2020-05-14 10:04 ` Matthias Brugger
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