From patchwork Sun Jan 6 11:14:59 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laxman Dewangan X-Patchwork-Id: 1937571 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 9B324DF2A2 for ; Sun, 6 Jan 2013 11:17:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755982Ab3AFLQY (ORCPT ); Sun, 6 Jan 2013 06:16:24 -0500 Received: from [216.228.121.35] ([216.228.121.35]:17372 "EHLO hqemgate04.nvidia.com" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1755884Ab3AFLQS (ORCPT ); Sun, 6 Jan 2013 06:16:18 -0500 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate04.nvidia.com id ; Sun, 06 Jan 2013 03:15:21 -0800 Received: from hqemhub02.nvidia.com ([172.17.108.22]) by hqnvupgp07.nvidia.com (PGP Universal service); Sun, 06 Jan 2013 03:11:20 -0800 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Sun, 06 Jan 2013 03:11:20 -0800 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by hqemhub02.nvidia.com (172.20.150.31) with Microsoft SMTP Server id 8.3.279.1; Sun, 6 Jan 2013 03:15:37 -0800 Received: from thelma.nvidia.com (Not Verified[172.16.212.77]) by hqnvemgw02.nvidia.com with MailMarshal (v6,7,2,8378) id ; Sun, 06 Jan 2013 03:15:37 -0800 Received: from ldewangan-ubuntu.nvidia.com ([10.19.65.30]) by thelma.nvidia.com (8.13.8+Sun/8.8.8) with ESMTP id r06BFNMl000907; Sun, 6 Jan 2013 03:15:34 -0800 (PST) From: Laxman Dewangan To: CC: , , , , , , , , Laxman Dewangan Subject: [PATCH V4 3/4] input: keyboard: tegra: add support for rows/cols configuration from dt Date: Sun, 6 Jan 2013 16:44:59 +0530 Message-ID: <1357470900-12619-4-git-send-email-ldewangan@nvidia.com> X-Mailer: git-send-email 1.7.1.1 In-Reply-To: <1357470900-12619-1-git-send-email-ldewangan@nvidia.com> References: <1357470900-12619-1-git-send-email-ldewangan@nvidia.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The NVIDIA's Tegra KBC has maximum 24 pins to make matrix keypad. Any pin can be configured as row or column. The maximum column pin can be 8 and maximum row pin can be 16. Remove the assumption that all first 16 pins will be used as row and remaining as columns and Add the property for configuring pins to either row or column from DT. Update the devicetree binding document accordingly. Signed-off-by: Laxman Dewangan Acked-by: Grant Likely --- Changes from V1: - renames the rows and pins property array. - nit cleanups. Changes from V2/V3: None .../bindings/input/nvidia,tegra20-kbc.txt | 22 ++++++ drivers/input/keyboard/tegra-kbc.c | 74 +++++++++++++++----- 2 files changed, 79 insertions(+), 17 deletions(-) diff --git a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt index 72683be..2995fae 100644 --- a/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt +++ b/Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt @@ -1,7 +1,18 @@ * Tegra keyboard controller +The key controller has maximum 24 pins to make matrix keypad. Any pin +can be configured as row or column. The maximum column pin can be 8 +and maximum row pins can be 16 for Tegra20/Tegra30. Required properties: - compatible: "nvidia,tegra20-kbc" +- reg: Register base address of KBC. +- interrupts: Interrupt number for the KBC. +- nvidia,kbc-row-pins: The KBC pins which are configured as row. This is an + array of pin numbers which is used as rows. +- nvidia,kbc-col-pins: The KBC pins which are configured as column. This is an + array of pin numbers which is used as column. +- linux,keymap: The keymap for keys as described in the binding document + devicetree/bindings/input/matrix-keymap.txt. Optional properties, in addition to those specified by the shared matrix-keyboard bindings: @@ -19,5 +30,16 @@ Example: keyboard: keyboard { compatible = "nvidia,tegra20-kbc"; reg = <0x7000e200 0x100>; + interrupts = <0 85 0x04>; nvidia,ghost-filter; + nvidia,debounce-delay-ms = <640>; + nvidia,kbc-row-pins = <0 1 2>; /* pin 0, 1, 2 as rows */ + nvidia,kbc-col-pins = <11 12 13>; /* pin 11, 12, 13 as columns */ + linux,keymap = <0x00000074 + 0x00010067 + 0x00020066 + 0x01010068 + 0x02000069 + 0x02010070 + 0x02020071>; }; diff --git a/drivers/input/keyboard/tegra-kbc.c b/drivers/input/keyboard/tegra-kbc.c index f799936..509afd4 100644 --- a/drivers/input/keyboard/tegra-kbc.c +++ b/drivers/input/keyboard/tegra-kbc.c @@ -614,13 +614,16 @@ static struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata( struct device_node *np = pdev->dev.of_node; u32 prop; int i; - - if (!np) - return NULL; + u32 num_rows = 0; + u32 num_cols = 0; + u32 cols_cfg[KBC_MAX_GPIO]; + u32 rows_cfg[KBC_MAX_GPIO]; + int proplen; + int ret; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) - return NULL; + return ERR_PTR(-ENOMEM); if (!of_property_read_u32(np, "nvidia,debounce-delay-ms", &prop)) pdata->debounce_cnt = prop; @@ -634,18 +637,55 @@ static struct tegra_kbc_platform_data *tegra_kbc_dt_parse_pdata( if (of_find_property(np, "nvidia,wakeup-source", NULL)) pdata->wakeup = true; - /* - * All currently known keymaps with device tree support use the same - * pin_cfg, so set it up here. - */ - for (i = 0; i < KBC_MAX_ROW; i++) { - pdata->pin_cfg[i].num = i; - pdata->pin_cfg[i].type = PIN_CFG_ROW; + if (!of_get_property(np, "nvidia,kbc-row-pins", &proplen)) { + dev_err(&pdev->dev, "property nvidia,kbc-row-pins not found\n"); + return ERR_PTR(-ENOENT); + } + num_rows = proplen / sizeof(u32); + + if (!of_get_property(np, "nvidia,kbc-col-pins", &proplen)) { + dev_err(&pdev->dev, "property nvidia,kbc-col-pins not found\n"); + return ERR_PTR(-ENOENT); + } + num_cols = proplen / sizeof(u32); + + if (!of_get_property(np, "linux,keymap", &proplen)) { + dev_err(&pdev->dev, "property linux,keymap not found\n"); + return ERR_PTR(-ENOENT); + } + + if (!num_rows || !num_cols || ((num_rows + num_cols) > KBC_MAX_GPIO)) { + dev_err(&pdev->dev, + "keypad rows/columns not porperly specified\n"); + return ERR_PTR(-EINVAL); } - for (i = 0; i < KBC_MAX_COL; i++) { - pdata->pin_cfg[KBC_MAX_ROW + i].num = i; - pdata->pin_cfg[KBC_MAX_ROW + i].type = PIN_CFG_COL; + /* Set all pins as non-configured */ + for (i = 0; i < KBC_MAX_GPIO; i++) + pdata->pin_cfg[i].type = PIN_CFG_IGNORE; + + ret = of_property_read_u32_array(np, "nvidia,kbc-row-pins", + rows_cfg, num_rows); + if (ret < 0) { + dev_err(&pdev->dev, "Rows configurations are not proper\n"); + return ERR_PTR(-ENOENT); + } + + ret = of_property_read_u32_array(np, "nvidia,kbc-col-pins", + cols_cfg, num_cols); + if (ret < 0) { + dev_err(&pdev->dev, "Cols configurations are not proper\n"); + return ERR_PTR(-ENOENT); + } + + for (i = 0; i < num_rows; i++) { + pdata->pin_cfg[rows_cfg[i]].type = PIN_CFG_ROW; + pdata->pin_cfg[rows_cfg[i]].num = i; + } + + for (i = 0; i < num_cols; i++) { + pdata->pin_cfg[cols_cfg[i]].type = PIN_CFG_COL; + pdata->pin_cfg[cols_cfg[i]].num = i; } return pdata; @@ -697,12 +737,12 @@ static int tegra_kbc_probe(struct platform_device *pdev) unsigned int debounce_cnt; unsigned int scan_time_rows; - if (!pdata) + if (!pdata && pdev->dev.of_node) pdata = tegra_kbc_dt_parse_pdata(pdev); - if (!pdata) { + if (IS_ERR_OR_NULL(pdata)) { dev_err(&pdev->dev, "Platform data missing\n"); - return -EINVAL; + return pdata ? PTR_ERR(pdata) : -EINVAL; } if (!tegra_kbc_check_pin_cfg(pdata, &pdev->dev, &num_rows))