Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755861AbaJHAKD (ORCPT ); Tue, 7 Oct 2014 20:10:03 -0400 Received: from mail-pa0-f49.google.com ([209.85.220.49]:48053 "EHLO mail-pa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755463AbaJHAKA (ORCPT ); Tue, 7 Oct 2014 20:10:00 -0400 Date: Tue, 7 Oct 2014 17:09:56 -0700 From: Dmitry Torokhov To: Matt Ranostay Cc: galak@codeaurora.org, zonque@gmail.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v4 2/3] cap11xx: Add support for various cap11xx devices Message-ID: <20141008000956.GN16469@dtor-ws> References: <1412051189-22643-1-git-send-email-mranostay@gmail.com> <1412051189-22643-3-git-send-email-mranostay@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1412051189-22643-3-git-send-email-mranostay@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Matt, On Mon, Sep 29, 2014 at 09:26:28PM -0700, Matt Ranostay wrote: > + priv->num_channels = cap->num_channels; > + priv->keycodes = devm_kcalloc(dev, > + priv->num_channels, sizeof(u32), GFP_KERNEL); > + if (!priv->keycodes) > + return -ENOMEM; Instead of allocating keymap separately can we do something like below? Thanks. -- Dmitry Input: cap11xx - add support for various cap11xx devices From: Matt Ranostay Several other variants of the cap11xx device exists with a varying number of capacitance detection channels. Add support for creating the channels dynamically. Signed-off-by: Matt Ranostay Reviewed-by: Daniel Mack Signed-off-by: Dmitry Torokhov --- .../devicetree/bindings/input/cap11xx.txt | 3 + drivers/input/keyboard/cap11xx.c | 62 +++++++++++++------- 2 files changed, 42 insertions(+), 23 deletions(-) diff --git a/Documentation/devicetree/bindings/input/cap11xx.txt b/Documentation/devicetree/bindings/input/cap11xx.txt index 738f5f3..8031aa5 100644 --- a/Documentation/devicetree/bindings/input/cap11xx.txt +++ b/Documentation/devicetree/bindings/input/cap11xx.txt @@ -7,9 +7,10 @@ Required properties: compatible: Must be on the following, depending on the model: "microchip,cap1106" + "microchip,cap1126" + "microchip,cap1188" reg: The I2C slave address of the device. - Only 0x28 is valid. interrupts: Property describing the interrupt line the device's ALERT#/CM_IRQ# pin is connected to. diff --git a/drivers/input/keyboard/cap11xx.c b/drivers/input/keyboard/cap11xx.c index 0da2e83..87fa209 100644 --- a/drivers/input/keyboard/cap11xx.c +++ b/drivers/input/keyboard/cap11xx.c @@ -1,7 +1,6 @@ /* * Input driver for Microchip CAP11xx based capacitive touch sensors * - * * (c) 2014 Daniel Mack * * This program is free software; you can redistribute it and/or modify @@ -54,8 +53,6 @@ #define CAP11XX_REG_MANUFACTURER_ID 0xfe #define CAP11XX_REG_REVISION 0xff -#define CAP11XX_NUM_CHN 6 -#define CAP11XX_PRODUCT_ID 0x55 #define CAP11XX_MANUFACTURER_ID 0x5d struct cap11xx_priv { @@ -63,7 +60,24 @@ struct cap11xx_priv { struct input_dev *idev; /* config */ - unsigned short keycodes[CAP11XX_NUM_CHN]; + u32 keycodes[]; +}; + +struct cap11xx_hw_model { + uint8_t product_id; + unsigned int num_channels; +}; + +enum { + CAP1106, + CAP1126, + CAP1188, +}; + +static const struct cap11xx_hw_model cap11xx_devices[] = { + [CAP1106] = { .product_id = 0x55, .num_channels = 6 }, + [CAP1126] = { .product_id = 0x53, .num_channels = 6 }, + [CAP1188] = { .product_id = 0x50, .num_channels = 8 }, }; static const struct reg_default cap11xx_reg_defaults[] = { @@ -150,7 +164,7 @@ static irqreturn_t cap11xx_thread_func(int irq_num, void *data) if (ret < 0) goto out; - for (i = 0; i < CAP11XX_NUM_CHN; i++) + for (i = 0; i < priv->idev->keycodemax; i++) input_report_key(priv->idev, priv->keycodes[i], status & (1 << i)); @@ -187,11 +201,16 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, struct device *dev = &i2c_client->dev; struct cap11xx_priv *priv; struct device_node *node; + const struct cap11xx_hw_model *cap = &cap11xx_devices[id->driver_data]; int i, error, irq, gain = 0; unsigned int val, rev; - u32 gain32, keycodes[CAP11XX_NUM_CHN]; + u32 gain32; + + BUG_ON(!cap->num_channels); - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + priv = devm_kzalloc(dev, + sizeof(*priv) + cap->num_channels * sizeof(u32), + GFP_KERNEL); if (!priv) return -ENOMEM; @@ -203,9 +222,9 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, if (error) return error; - if (val != CAP11XX_PRODUCT_ID) { + if (val != cap->product_id) { dev_err(dev, "Product ID: Got 0x%02x, expected 0x%02x\n", - val, CAP11XX_PRODUCT_ID); + val, cap->product_id); return -ENODEV; } @@ -225,8 +244,8 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, dev_info(dev, "CAP11XX detected, revision 0x%02x\n", rev); i2c_set_clientdata(i2c_client, priv); - node = dev->of_node; + node = dev->of_node; if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) { if (is_power_of_2(gain32) && gain32 <= 8) gain = ilog2(gain32); @@ -234,17 +253,12 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, dev_err(dev, "Invalid sensor-gain value %d\n", gain32); } - BUILD_BUG_ON(ARRAY_SIZE(keycodes) != ARRAY_SIZE(priv->keycodes)); - /* Provide some useful defaults */ - for (i = 0; i < ARRAY_SIZE(keycodes); i++) - keycodes[i] = KEY_A + i; + for (i = 0; i < cap->num_channels; i++) + priv->keycodes[i] = KEY_A + i; of_property_read_u32_array(node, "linux,keycodes", - keycodes, ARRAY_SIZE(keycodes)); - - for (i = 0; i < ARRAY_SIZE(keycodes); i++) - priv->keycodes[i] = keycodes[i]; + priv->keycodes, cap->num_channels); error = regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL, CAP11XX_REG_MAIN_CONTROL_GAIN_MASK, @@ -268,17 +282,17 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, if (of_property_read_bool(node, "autorepeat")) __set_bit(EV_REP, priv->idev->evbit); - for (i = 0; i < CAP11XX_NUM_CHN; i++) + for (i = 0; i < cap->num_channels; i++) __set_bit(priv->keycodes[i], priv->idev->keybit); __clear_bit(KEY_RESERVED, priv->idev->keybit); priv->idev->keycode = priv->keycodes; priv->idev->keycodesize = sizeof(priv->keycodes[0]); - priv->idev->keycodemax = ARRAY_SIZE(priv->keycodes); + priv->idev->keycodemax = cap->num_channels; priv->idev->id.vendor = CAP11XX_MANUFACTURER_ID; - priv->idev->id.product = CAP11XX_PRODUCT_ID; + priv->idev->id.product = cap->product_id; priv->idev->id.version = rev; priv->idev->open = cap11xx_input_open; @@ -312,12 +326,16 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, static const struct of_device_id cap11xx_dt_ids[] = { { .compatible = "microchip,cap1106", }, + { .compatible = "microchip,cap1126", }, + { .compatible = "microchip,cap1188", }, {} }; MODULE_DEVICE_TABLE(of, cap11xx_dt_ids); static const struct i2c_device_id cap11xx_i2c_ids[] = { - { "cap1106", 0 }, + { "cap1106", CAP1106 }, + { "cap1126", CAP1126 }, + { "cap1188", CAP1188 }, {} }; MODULE_DEVICE_TABLE(i2c, cap11xx_i2c_ids); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/