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Tue, 14 Jan 2020 04:39:04 -0800 Received: from MTKMBS32DR.mediatek.inc (172.27.6.104) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 14 Jan 2020 04:29:48 -0800 Received: from mtkcas09.mediatek.inc (172.21.101.178) by MTKMBS32DR.mediatek.inc (172.27.6.104) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 14 Jan 2020 20:28:04 +0800 Received: from localhost.localdomain (10.15.43.140) by mtkcas09.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Tue, 14 Jan 2020 20:29:44 +0800 From: fengping.yu To: Dmitry Torokhov , Rob Herring , Andy Shevchenko , Marco Felsch , Matthias Brugger Subject: [PATCH V3 2/2] drivers: input: keyboard: add mtk keypad driver Date: Tue, 14 Jan 2020 20:27:41 +0800 Message-ID: <20200114122738.103344-3-fengping.yu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20200114122738.103344-1-fengping.yu@mediatek.com> References: <20200114122738.103344-1-fengping.yu@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 2C1AE87E0845F6354DDCF9DBECAB361CE7C439E6664B7BE32F23C13A4E1B70052000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200114_043906_519430_B2B17956 X-CRM114-Status: GOOD ( 14.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-input@vger.kernel.org, "fengping.yu" , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Signed-off-by: fengping.yu Add matrix keypad driver for MTK SoC. --- arch/arm64/configs/defconfig | 1 + drivers/input/keyboard/Kconfig | 8 + drivers/input/keyboard/Makefile | 1 + drivers/input/keyboard/mtk-kpd.c | 280 +++++++++++++++++++++++++++++++ 4 files changed, 290 insertions(+) create mode 100644 drivers/input/keyboard/mtk-kpd.c diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 8e05c39eab08..62bed77ec127 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -315,6 +315,7 @@ CONFIG_KEYBOARD_ADC=m CONFIG_KEYBOARD_GPIO=y CONFIG_KEYBOARD_SNVS_PWRKEY=m CONFIG_KEYBOARD_CROS_EC=y +CONFIG_KEYBOARD_MTK=y CONFIG_INPUT_TOUCHSCREEN=y CONFIG_TOUCHSCREEN_ATMEL_MXT=m CONFIG_INPUT_MISC=y diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 8911bc2ec42a..01747a97536b 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -775,4 +775,12 @@ config KEYBOARD_MTK_PMIC To compile this driver as a module, choose M here: the module will be called pmic-keys. +config KEYBOARD_MTK + tristate "MediaTek Keypad Support" + help + Say Y here if you want to use the keypad. + If unuse, say N. + To compile this driver as a module, choose M here: the + module will be called mtk-kpd. + endif diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 9510325c0c5d..daa654bcce6e 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -41,6 +41,7 @@ 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-$(CONFIG_KEYBOARD_MTK) += mtk-kpd.o obj-$(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..e36461c9dd89 --- /dev/null +++ b/drivers/input/keyboard/mtk-kpd.c @@ -0,0 +1,280 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 MediaTek Inc. + * Author Terry Chang + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define KPD_NAME "mtk-kpd" + +#define KP_STA 0x0000 +#define KP_MEM1 0x0004 +#define KP_MEM2 0x0008 +#define KP_MEM3 0x000c +#define KP_MEM4 0x0010 +#define KP_MEM5 0x0014 +#define KP_DEBOUNCE 0x0018 +#define KP_SEL 0x0020 +#define KP_EN 0x0024 + +#define KP_COL0_SEL BIT(10) +#define KP_COL1_SEL BIT(11) +#define KP_COL2_SEL BIT(12) + +#define KPD_DEBOUNCE_MASK GENMASK_ULL(13, 0) + +#define KPD_NUM_MEMS 5 +#define KPD_MEM5_BITS 8 +#define KPD_NUM_KEYS 72 /* 4 * 16 + KPD_MEM5_BITS */ + +struct mtk_keypad { + struct input_dev *input_dev; + struct clk *clk; + void __iomem *base; + unsigned int irqnr; + bool wakeup; + u32 key_debounce; + u32 n_rows; + u32 n_cols; + u32 keymap_state[KPD_NUM_MEMS]; +}; + +static void kpd_get_keymap_state(void __iomem *kp_base, u32 state[]) +{ + memset_io(state, 0xff, KPD_NUM_MEMS); + memcpy_fromio(state, kp_base, KPD_NUM_MEMS); +} + +static irqreturn_t kpd_irq_handler(int irq, void *dev_id) +{ + /* use _nosync to avoid deadlock */ + struct mtk_keypad *keypad = dev_id; + unsigned short *keycode = keypad->input_dev->keycode; + u32 new_state[KPD_NUM_MEMS], mask; + unsigned long change = 0; + int bit_nr; + int pressed; + u32 row_shift = get_count_order(keypad->n_cols); + unsigned short code; + int i; + + disable_irq_nosync(keypad->irqnr); + + kpd_get_keymap_state(keypad->base, new_state); + + for (i = 0; i < KPD_NUM_MEMS; i++) { + change = new_state[i] ^ keypad->keymap_state[i]; + if (!change) + continue; + + for_each_set_bit(bit_nr, &change, 32) { + mask = 1 << bit_nr; + pressed = (new_state[i] & mask) == 0U; + dev_dbg(&keypad->input_dev->dev, + "%s", pressed ? "pressed" : "released"); + + code = keycode[MATRIX_SCAN_CODE(i, bit_nr, row_shift)]; + + 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); + } + } + + memcpy(keypad->keymap_state, new_state, sizeof(new_state)); + + enable_irq(keypad->irqnr); + + return IRQ_HANDLED; +} + +static int kpd_get_dts_info(struct mtk_keypad *keypad) +{ + int ret; + struct device *dev = keypad->input_dev->dev.parent; + struct device_node *node = dev->of_node; + + ret = matrix_keypad_parse_properties(dev, &keypad->n_rows, + &keypad->n_cols); + + if (ret) { + dev_err(dev, "failed to parse keypad params.\n"); + return ret; + } + + ret = of_property_read_u32(node, "mediatek,debounce-us", + &keypad->key_debounce); + if (ret) { + pr_debug("read mediatek,debounce-us error.\n"); + return ret; + } + + keypad->wakeup = of_property_read_bool(node, "wakeup-source"); + + dev_dbg(dev, "n_row=%d n_col=%d debounce=%d.\n", + keypad->n_rows, keypad->n_cols, + keypad->key_debounce); + + return 0; +} + +static int kpd_gpio_init(struct device *dev) +{ + struct pinctrl *keypad_pinctrl; + struct pinctrl_state *kpd_default; + + keypad_pinctrl = devm_pinctrl_get(dev); + if (IS_ERR(keypad_pinctrl)) { + dev_err(dev, "Cannot find keypad_pinctrl!\n"); + + return PTR_ERR(keypad_pinctrl); + } + + kpd_default = pinctrl_lookup_state(keypad_pinctrl, "default"); + if (IS_ERR(kpd_default)) { + dev_err(dev, "Cannot find ecall_state!\n"); + + return PTR_ERR(kpd_default); + } + + return pinctrl_select_state(keypad_pinctrl, kpd_default); +} + +static int kpd_pdrv_probe(struct platform_device *pdev) +{ + struct mtk_keypad *keypad; + struct resource *res; + int err; + + if (!pdev->dev.of_node) { + dev_err(&pdev->dev, "No device tree data present.\n"); + return -EINVAL; + } + + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL); + if (!keypad) + return -ENOMEM; + + memset(keypad->keymap_state, 0xff, sizeof(keypad->keymap_state)); + + keypad->input_dev = devm_input_allocate_device(&pdev->dev); + if (!keypad->input_dev) { + dev_err(&pdev->dev, "input allocate device fail.\n"); + return -ENOMEM; + } + + keypad->input_dev->name = KPD_NAME; + keypad->input_dev->id.bustype = BUS_HOST; + keypad->input_dev->dev.parent = &pdev->dev; + + err = kpd_get_dts_info(keypad); + if (err) { + dev_err(&pdev->dev, "get dts info failed.\n"); + return err; + } + + err = matrix_keypad_build_keymap(NULL, NULL, + keypad->n_rows, + keypad->n_cols, + NULL, + keypad->input_dev); + + if (err) { + dev_err(&pdev->dev, "build keymap failed.\n"); + return err; + } + + input_set_drvdata(keypad->input_dev, keypad); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "get IO memory resource failed.\n"); + return -ENODEV; + } + + keypad->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(keypad->base)) { + dev_err(&pdev->dev, "KP iomap failed\n"); + return PTR_ERR(keypad->base); + } + + writew((keypad->key_debounce * 32 / 1000 & KPD_DEBOUNCE_MASK), + keypad->base + KP_DEBOUNCE); + + keypad->clk = devm_clk_get(&pdev->dev, "kpd"); + if (IS_ERR(keypad->clk)) { + dev_err(&pdev->dev, "get kpd-clk fail.\n"); + return PTR_ERR(keypad->clk); + } + + err = clk_prepare_enable(keypad->clk); + if (err) { + dev_err(&pdev->dev, "kpd-clk prepare enable failed.\n"); + return err; + } + + err = kpd_gpio_init(&pdev->dev); + if (err) { + dev_err(&pdev->dev, "gpio init failed\n"); + return err; + } + + keypad->irqnr = platform_get_irq(pdev, 0); + if (!keypad->irqnr) { + dev_err(&pdev->dev, "KP get irqnr failed\n"); + return -EINVAL; + } + + err = devm_request_irq(&pdev->dev, keypad->irqnr, + kpd_irq_handler, 0, + KPD_NAME, keypad); + if (err) { + dev_err(&pdev->dev, "register IRQ failed.\n"); + return err; + } + + err = input_register_device(keypad->input_dev); + if (err) { + dev_err(&pdev->dev, "register input device failed.\n"); + return err; + } + + device_init_wakeup(&pdev->dev, keypad->wakeup); + + platform_set_drvdata(pdev, keypad); + + return 0; +} + +static const struct of_device_id kpd_of_match[] = { + {.compatible = "mediatek,kp"}, + {} +}; + +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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel