From patchwork Sun Apr 26 16:11:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 11510685 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 CCF8D14DD for ; Sun, 26 Apr 2020 16:11:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6965214D8 for ; Sun, 26 Apr 2020 16:11:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=rere.qmqm.pl header.i=@rere.qmqm.pl header.b="k2yYQapo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726272AbgDZQLS (ORCPT ); Sun, 26 Apr 2020 12:11:18 -0400 Received: from rere.qmqm.pl ([91.227.64.183]:26745 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726196AbgDZQLR (ORCPT ); Sun, 26 Apr 2020 12:11:17 -0400 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 499CZV4vR6z1qr; Sun, 26 Apr 2020 18:11:14 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1587917474; bh=ES5mrVpUOZunenMeuWR5BPMeVBmhaTYU6SnbH2hnqMc=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=k2yYQapoLbGX1QALmcLHTpsJL0kfIkLmikTVdkPt4UdlMkgWf6bw8HHpV+Cn1wrKl RCZKwO0UoVnq6rNMT1dWg06Us7VWufnT9yEwjAGEabqk1hJEMKehVX8laTcyW079hC BQJzb1O/xdtLFDLa766N54fFXyhHp0AoYLL+JOi2i2CKvuKDStaxuJ9teFOJAShE/G 25/NmbiDVfjEsrMHjDlnlyJFDDoqIhdSU51EqXvTHjCiAeYi95JavFca0R30enJTBN xAhEsUPrZphple6OmhBY7aCu+/TY2/LFAEVZhISOsDh5hbGzpNP3TPGeq9tnqEHjc2 kxTTK35xD8Mow== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.102.2 at mail Date: Sun, 26 Apr 2020 18:11:13 +0200 Message-Id: <28ca3d62c2c9ac38dd84759c927e14c231d2e721.1587916846.git.mirq-linux@rere.qmqm.pl> In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH v4 06/10] input: elants: read touchscreen size for EKTF3624 MIME-Version: 1.0 To: David Heidelberg , Dmitry Osipenko , Dmitry Torokhov , Henrik Rydberg , James Chen , Johnny Chuang , Rob Herring , Scott Liu Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org EKTF3624 as present in Asus TF300T tablet has touchscreen size encoded in different registers. Signed-off-by: Michał Mirosław Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko --- drivers/input/touchscreen/elants_i2c.c | 82 ++++++++++++++++++++++++-- 1 file changed, 77 insertions(+), 5 deletions(-) diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index 71ffbc565d8e..34d5c1fb5bea 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -34,7 +34,7 @@ #include #include #include -#include +#include #include #include #include @@ -42,6 +42,10 @@ /* Device, Driver information */ #define DEVICE_NAME "elants_i2c" +/* Device IDs */ +#define EKTH3500 0 +#define EKTF3624 1 + /* Convert from rows or columns into resolution */ #define ELAN_TS_RESOLUTION(n, m) (((n) - 1) * (m)) @@ -164,6 +168,7 @@ struct elants_data { bool wake_irq_enabled; bool keep_power_in_suspend; + u8 chip_id; /* Must be last to be used for DMA operations */ u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned; @@ -442,7 +447,58 @@ static int elants_i2c_query_bc_version(struct elants_data *ts) return 0; } -static int elants_i2c_query_ts_info(struct elants_data *ts) +static int elants_i2c_query_ts_info_ektf(struct elants_data *ts) +{ + struct i2c_client *client = ts->client; + int error; + u8 resp[4]; + u16 phy_x, phy_y; + const u8 get_xres_cmd[] = { + CMD_HEADER_READ, E_INFO_X_RES, 0x00, 0x00 + }; + const u8 get_yres_cmd[] = { + CMD_HEADER_READ, E_INFO_Y_RES, 0x00, 0x00 + }; + + /* Get X/Y size in mm */ + error = elants_i2c_execute_command(client, get_xres_cmd, + sizeof(get_xres_cmd), + resp, sizeof(resp), 1, + "get X size"); + if (error) + return error; + + phy_x = resp[2] | ((resp[3] & 0xF0) << 4); + + error = elants_i2c_execute_command(client, get_yres_cmd, + sizeof(get_yres_cmd), + resp, sizeof(resp), 1, + "get Y size"); + if (error) + return error; + + phy_y = resp[2] | ((resp[3] & 0xF0) << 4); + + if (!phy_x || !phy_y) { + dev_warn(&client->dev, + "invalid size data: %d x %d mm\n", + phy_x, phy_y); + return 0; + } + + dev_dbg(&client->dev, "phy_x=%d, phy_y=%d\n", phy_x, phy_y); + + /* calculate resolution from size */ + ts->x_max = 2240-1; + ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, phy_x); + + ts->y_max = 1408-1; + ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, phy_y); + + return 0; +} + +static int elants_i2c_query_ts_info_ekth(struct elants_data *ts) { struct i2c_client *client = ts->client; int error; @@ -593,8 +649,20 @@ static int elants_i2c_initialize(struct elants_data *ts) error = elants_i2c_query_fw_version(ts); if (!error) error = elants_i2c_query_test_version(ts); - if (!error) - error = elants_i2c_query_ts_info(ts); + + switch (ts->chip_id) { + case EKTH3500: + if (!error) + error = elants_i2c_query_ts_info_ekth(ts); + break; + case EKTF3624: + if (!error) + error = elants_i2c_query_ts_info_ektf(ts); + break; + default: + unreachable(); + break; + } if (error) ts->iap_mode = ELAN_IAP_RECOVERY; @@ -1245,6 +1313,9 @@ static int elants_i2c_probe(struct i2c_client *client, ts->client = client; i2c_set_clientdata(client, ts); + if (client->dev.of_node) + ts->chip_id = (uintptr_t)of_device_get_match_data(&client->dev); + ts->vcc33 = devm_regulator_get(&client->dev, "vcc33"); if (IS_ERR(ts->vcc33)) { error = PTR_ERR(ts->vcc33); @@ -1471,7 +1542,8 @@ MODULE_DEVICE_TABLE(acpi, elants_acpi_id); #ifdef CONFIG_OF static const struct of_device_id elants_of_match[] = { - { .compatible = "elan,ekth3500" }, + { .compatible = "elan,ekth3500", .data = (void *)EKTH3500 }, + { .compatible = "elan,ektf3624", .data = (void *)EKTF3624 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, elants_of_match);