From patchwork Fri May 8 05:56:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 11535563 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 18CCA1668 for ; Fri, 8 May 2020 05:58:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 06F4720CC7 for ; Fri, 8 May 2020 05:58:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725896AbgEHF6S (ORCPT ); Fri, 8 May 2020 01:58:18 -0400 Received: from esa2.mentor.iphmx.com ([68.232.141.98]:2693 "EHLO esa2.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727917AbgEHF6S (ORCPT ); Fri, 8 May 2020 01:58:18 -0400 IronPort-SDR: NqB1XzEfyIDwEjRLcQF+Xb6VuNo1IOqYgjoUObM93vFccUj9nIYMYimFhvhJYh8zXjJQe3Vb4h u61SIWFxGcZOgd9bxUSFmoAd8qy8ZrtrJSfEwqoJNLDjkLc4CZ59pSm2OTVi0lDiFnQgn5HXye Eyj5e5Ajl2/+TK3TPIfZjJ/Vljr5fNwC6npYmybN1sBrHL7L18HD4cfNrZzUi7JPQvUh1sozOY t9yYljCBBspxDxlgQ9ZKYlPjov/pt3nftRJfaxBGGtBk+oxa/rXylB0N1EWd/Sc0NrnoK4zVHB E2E= X-IronPort-AV: E=Sophos;i="5.73,366,1583222400"; d="scan'208";a="48589086" Received: from orw-gwy-01-in.mentorg.com ([192.94.38.165]) by esa2.mentor.iphmx.com with ESMTP; 07 May 2020 21:58:17 -0800 IronPort-SDR: JnrN9cXZ1cZKtD8WWsvP1H6bdBN/6HMGRhDyaWKyRvVfVBWM09cKL8KYDQZaeSbRMcFJWaVROX 77a62dLCczYB71Q/12G+b4Fb93mxXCb9aZbe8p50DoZMiVrWPeTy6m4DJF19QDu/nuDhPBkToJ KD0Hc/8MFvr7rARd1F9D5RGHAMlOKrg3Wa9p2Fauj1HEVQNveTQHX9wH6AcQ6k3yzeYz7TSowO kBy+6jBfCJZLq8A/+/ycrD3ZK8nkow89BSxzda1xMNWJ+wRG1FBGKquXUkFbzVTjeMhAN1CYeE gv4= From: Jiada Wang To: , , , , CC: , , , , Subject: [PATCH v11 20/56] Input: atmel_mxt_ts - handle cfg filename via pdata/sysfs Date: Thu, 7 May 2020 22:56:20 -0700 Message-ID: <20200508055656.96389-21-jiada_wang@mentor.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200508055656.96389-1-jiada_wang@mentor.com> References: <20200508055656.96389-1-jiada_wang@mentor.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Nick Dyer There may be multiple maXTouch chips on a single device which will require different configuration files. Add a platform data value for the configuration filename. Add sysfs entry to write configuration file if the platform data is not set. Split out the object initialisation code from mxt_initialize() into mxt_configure_objects() to allow this. Signed-off-by: Nick Dyer Acked-by: Yufeng Shen (cherry picked from ndyer/linux/for-upstream commit 71a2a4d1954460b949a16b607f72bafab294ca79) [gdavis: Resolve forward port conflicts due to applying upstream commit 96a938aa214e ("Input: atmel_mxt_ts - remove platform data support").] Signed-off-by: George G. Davis [gdavis: Squash fix from Vladimir Zapolskiy: - Input: atmel_mxt_ts - fix error paths in mxt_configure_objects()] Signed-off-by: Vladimir Zapolskiy [jiada: Separate Documentation/ portion change to another commit Rename mxt_update_cfg_store to update_cfg_store Replace DEVICE_ATTR with DEVICE_ATTR_WO Allow to fallback to legacy cfg name "maxtouch.cfg", if atmel,cfg_name isn't specified in device-tree] Signed-off-by: Jiada Wang --- drivers/input/touchscreen/atmel_mxt_ts.c | 85 ++++++++++++++++++++++-- 1 file changed, 79 insertions(+), 6 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 720574417219..503e70603a67 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -335,6 +335,8 @@ struct mxt_data { struct regulator *reg_vdd; struct regulator *reg_avdd; char *fw_name; + char *cfg_name; + const char *pcfg_name; /* Cached parameters from object table */ u16 T5_address; @@ -377,6 +379,9 @@ struct mxt_data { /* Indicates whether device is in suspend */ bool suspended; + + /* Indicates whether device is updating configuration */ + bool updating_config; }; struct mxt_vb2_buffer { @@ -2578,8 +2583,11 @@ static int mxt_initialize(struct mxt_data *data) if (error) return error; - error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, - &client->dev, GFP_KERNEL, data, + error = request_firmware_nowait(THIS_MODULE, true, + data->cfg_name ? + data->cfg_name : MXT_CFG_NAME, + &client->dev, + GFP_KERNEL, data, mxt_config_cb); if (error) { dev_err(&client->dev, "Failed to invoke firmware loader: %d\n", @@ -3081,19 +3089,21 @@ static int mxt_configure_objects(struct mxt_data *data, error = mxt_init_t7_power_cfg(data); if (error) { dev_err(dev, "Failed to initialize power cfg\n"); - return error; + goto err_free_object_table; } if (cfg) { error = mxt_update_cfg(data, cfg); - if (error) + if (error) { dev_warn(dev, "Error %d updating config\n", error); + goto err_free_object_table; + } } if (data->multitouch) { error = mxt_initialize_input_device(data); if (error) - return error; + goto err_free_object_table; } else { dev_warn(dev, "No touch object detected\n"); } @@ -3101,6 +3111,10 @@ static int mxt_configure_objects(struct mxt_data *data, mxt_debug_init(data); return 0; + +err_free_object_table: + mxt_free_object_table(data); + return error; } /* Firmware Version is returned as Major.Minor.Build */ @@ -3392,6 +3406,55 @@ static ssize_t update_fw_store(struct device *dev, return count; } +static ssize_t update_cfg_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct mxt_data *data = dev_get_drvdata(dev); + const struct firmware *cfg; + int ret; + + ret = mxt_update_file_name(dev, &data->cfg_name, buf, count); + if (ret) + return ret; + + ret = request_firmware(&cfg, data->cfg_name, dev); + if (ret < 0) { + dev_err(dev, "Failure to request config file %s\n", + data->cfg_name); + ret = -ENOENT; + goto out; + } + + data->updating_config = true; + + mxt_free_input_device(data); + + if (data->suspended) { + if (data->suspend_mode == MXT_SUSPEND_REGULATOR) { + enable_irq(data->irq); + mxt_regulator_enable(data); + } else if (data->suspend_mode == MXT_SUSPEND_DEEP_SLEEP) { + mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); + mxt_acquire_irq(data); + } + + data->suspended = false; + } + + ret = mxt_configure_objects(data, cfg); + if (ret) + goto release; + + ret = count; + +release: + release_firmware(cfg); +out: + data->updating_config = false; + return ret; +} + static DEVICE_ATTR_WO(update_fw); static struct attribute *mxt_fw_attrs[] = { @@ -3406,11 +3469,13 @@ static const struct attribute_group mxt_fw_attr_group = { static DEVICE_ATTR_RO(fw_version); static DEVICE_ATTR_RO(hw_version); static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); +static DEVICE_ATTR_WO(update_cfg); static struct attribute *mxt_attrs[] = { &dev_attr_fw_version.attr, &dev_attr_hw_version.attr, &dev_attr_object.attr, + &dev_attr_update_cfg.attr, NULL }; @@ -3511,7 +3576,7 @@ static int mxt_stop(struct mxt_data *data) { int ret; - if (data->suspended || data->in_bootloader) + if (data->suspended || data->in_bootloader || data->updating_config) return 0; switch (data->suspend_mode) { @@ -3580,6 +3645,8 @@ static int mxt_parse_device_properties(struct mxt_data *data) int n_keys; int error; + device_property_read_string(dev, "atmel,cfg_name", &data->pcfg_name); + if (device_property_present(dev, keymap_property)) { n_keys = device_property_count_u32(dev, keymap_property); if (n_keys <= 0) { @@ -3705,6 +3772,12 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) if (error) return error; + if (data->pcfg_name) + mxt_update_file_name(&data->client->dev, + &data->cfg_name, + data->pcfg_name, + strlen(data->pcfg_name)); + data->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(data->reset_gpio)) {