From patchwork Thu Mar 19 14:59:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 11447333 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 6A508913 for ; Thu, 19 Mar 2020 15:01:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 545902072D for ; Thu, 19 Mar 2020 15:01:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727930AbgCSPB0 (ORCPT ); Thu, 19 Mar 2020 11:01:26 -0400 Received: from esa2.mentor.iphmx.com ([68.232.141.98]:5326 "EHLO esa2.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727470AbgCSPB0 (ORCPT ); Thu, 19 Mar 2020 11:01:26 -0400 IronPort-SDR: A0RnMW872/LsAGAnDC9loRPWo0F9AnKDoXkG+N7O+lPAbi6zj9wMxNsLL7NX3L28ZTU7eWM1AT L51LxHshm+1p1LTq1FcEOOJzOZdz7aR/VJ3Ko7z/qzgy+9lY2Do8tCq6e9G+H2nfB4chE0IKnU x66tMIdRdBQsJ3aMVJFOlMyn2Zxe9MQAs0kiHNhZtOBMS5Ie1CcsvL1sBm9x6X4QeXs6v2cza5 LNkgqVxq7pfhT6p1EEBAqoLs2aMGRIgFo8ez3C+hPg7dkJuAtaHVBRtdtA9Xua/dtKW9FgB/tS /0o= X-IronPort-AV: E=Sophos;i="5.70,572,1574150400"; d="scan'208";a="46818671" Received: from orw-gwy-02-in.mentorg.com ([192.94.38.167]) by esa2.mentor.iphmx.com with ESMTP; 19 Mar 2020 07:01:24 -0800 IronPort-SDR: cRMiJ7ao3znRQ/de7XczIhuuuj0HpkHhMccz/THEMD/j/ar1rXbnvu6D4jLLlSdbXaXTZ26wzw QfA6pKYk+lZtn8TMaOFa+i6BLb6kedpLseCt3h2h3BEbvODryU37hFtI794Alz8UBOFUYhFtua wOApsxlhUSwVku6zP4xnefjH9+vYDg/7seWX7mTBYbDQWkZFAOU0pDR6Olch+Uh5i1I4pjRfVT N0qQ7IhTW2/QImfVKgITRRiFm6bb1m5onD+Mwp4dpCbnlmk0BNgZcldtKp21OavBvDnMtZH6q/ yg4= From: Jiada Wang To: , , , , , CC: , , , , Subject: [PATCH v8 16/52] Input: atmel_mxt_ts - allow specification of firmware file name Date: Thu, 19 Mar 2020 07:59:40 -0700 Message-ID: <20200319150016.61398-17-jiada_wang@mentor.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200319150016.61398-1-jiada_wang@mentor.com> References: <20200319150016.61398-1-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 On platforms which have multiple device instances using this driver, the firmware may be different on each device. This patch makes the user give the name of the firmware file when flashing. This also prevents accidental triggering of the firmware load process. Signed-off-by: Nick Dyer Acked-by: Benson Leung Acked-by: Yufeng Shen (cherry picked from ndyer/linux/for-upstream commit 76ebb7cee971cb42dfb0a3a9224403b8b09abcf1) [gdavis: Forward port and fix conflicts.] Signed-off-by: George G. Davis Signed-off-by: Jiada Wang --- drivers/input/touchscreen/atmel_mxt_ts.c | 43 ++++++++++++++++++++---- 1 file changed, 37 insertions(+), 6 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index f8783e37436f..0e30ff372a43 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -33,8 +33,7 @@ #include #include -/* Firmware files */ -#define MXT_FW_NAME "maxtouch.fw" +/* Configuration file */ #define MXT_CFG_NAME "maxtouch.cfg" #define MXT_CFG_MAGIC "OBP_RAW V1" @@ -335,6 +334,7 @@ struct mxt_data { bool use_retrigen_workaround; struct regulator *reg_vdd; struct regulator *reg_avdd; + char *fw_name; /* Cached parameters from object table */ u16 T5_address; @@ -3207,7 +3207,7 @@ static int mxt_check_firmware_format(struct device *dev, return -EINVAL; } -static int mxt_load_fw(struct device *dev, const char *fn) +static int mxt_load_fw(struct device *dev) { struct mxt_data *data = dev_get_drvdata(dev); const struct firmware *fw = NULL; @@ -3217,9 +3217,9 @@ static int mxt_load_fw(struct device *dev, const char *fn) unsigned int frame = 0; int ret; - ret = request_firmware(&fw, fn, dev); + ret = request_firmware(&fw, data->fw_name, dev); if (ret) { - dev_err(dev, "Unable to open firmware %s\n", fn); + dev_err(dev, "Unable to open firmware %s\n", data->fw_name); return ret; } @@ -3339,6 +3339,33 @@ static int mxt_load_fw(struct device *dev, const char *fn) return ret; } +static int mxt_update_file_name(struct device *dev, char **file_name, + const char *buf, size_t count) +{ + char *file_name_tmp; + + /* Simple sanity check */ + if (count > 64) { + dev_warn(dev, "File name too long\n"); + return -EINVAL; + } + + file_name_tmp = krealloc(*file_name, count + 1, GFP_KERNEL); + if (!file_name_tmp) + return -ENOMEM; + + *file_name = file_name_tmp; + memcpy(*file_name, buf, count); + + /* Echo into the sysfs entry may append newline at the end of buf */ + if (buf[count - 1] == '\n') + (*file_name)[count - 1] = '\0'; + else + (*file_name)[count] = '\0'; + + return 0; +} + static ssize_t mxt_update_fw_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -3346,7 +3373,11 @@ static ssize_t mxt_update_fw_store(struct device *dev, struct mxt_data *data = dev_get_drvdata(dev); int error; - error = mxt_load_fw(dev, MXT_FW_NAME); + error = mxt_update_file_name(dev, &data->fw_name, buf, count); + if (error) + return error; + + error = mxt_load_fw(dev); if (error) { dev_err(dev, "The firmware update failed(%d)\n", error); count = error;