From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756662AbbLBUvW (ORCPT ); Wed, 2 Dec 2015 15:51:22 -0500 Received: from kdh-gw.itdev.co.uk ([89.21.227.133]:39203 "EHLO hermes.kdh.itdev.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752536AbbLBUvR (ORCPT ); Wed, 2 Dec 2015 15:51:17 -0500 X-Greylist: delayed 519 seconds by postgrey-1.27 at vger.kernel.org; Wed, 02 Dec 2015 15:51:16 EST From: Nick Dyer To: Dmitry Torokhov Cc: Yufeng Shen , Benson Leung , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Bowens , Javier Martinez Canillas , Chris Healy , Nick Dyer Subject: [PATCH RFC 3/8] Input: atmel_mxt_ts - read touchscreen position in matrix Date: Wed, 2 Dec 2015 20:42:26 +0000 Message-Id: <1449088951-7069-4-git-send-email-nick.dyer@itdev.co.uk> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1449088951-7069-1-git-send-email-nick.dyer@itdev.co.uk> References: <1449088951-7069-1-git-send-email-nick.dyer@itdev.co.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The touchscreen may have a margin where not all the matrix is used. Read the parameters from T9 and T100 and take account of the difference. Signed-off-by: Nick Dyer --- drivers/input/touchscreen/atmel_mxt_ts.c | 41 ++++++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 5 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index a96fec4..9bc42f4 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -100,6 +100,8 @@ struct t7_config { /* MXT_TOUCH_MULTI_T9 field */ #define MXT_T9_CTRL 0 +#define MXT_T9_XSIZE 3 +#define MXT_T9_YSIZE 4 #define MXT_T9_ORIENT 9 #define MXT_T9_RANGE 18 @@ -145,7 +147,9 @@ struct t37_debug { #define MXT_T100_CTRL 0 #define MXT_T100_CFG1 1 #define MXT_T100_TCHAUX 3 +#define MXT_T100_XSIZE 9 #define MXT_T100_XRANGE 13 +#define MXT_T100_YSIZE 20 #define MXT_T100_YRANGE 24 #define MXT_T100_CFG_SWITCHXY BIT(5) @@ -243,6 +247,8 @@ struct mxt_data { unsigned int max_x; unsigned int max_y; bool xy_switch; + u8 xsize; + u8 ysize; bool in_bootloader; u16 mem_size; u8 t100_aux_ampl; @@ -1688,6 +1694,18 @@ static int mxt_read_t9_resolution(struct mxt_data *data) return -EINVAL; error = __mxt_read_reg(client, + object->start_address + MXT_T9_XSIZE, + sizeof(data->xsize), &data->xsize); + if (error) + return error; + + error = __mxt_read_reg(client, + object->start_address + MXT_T9_YSIZE, + sizeof(data->ysize), &data->ysize); + if (error) + return error; + + error = __mxt_read_reg(client, object->start_address + MXT_T9_RANGE, sizeof(range), &range); if (error) @@ -1737,6 +1755,18 @@ static int mxt_read_t100_config(struct mxt_data *data) data->max_y = get_unaligned_le16(&range_y); + error = __mxt_read_reg(client, + object->start_address + MXT_T100_XSIZE, + sizeof(data->xsize), &data->xsize); + if (error) + return error; + + error = __mxt_read_reg(client, + object->start_address + MXT_T100_YSIZE, + sizeof(data->ysize), &data->ysize); + if (error) + return error; + /* read orientation config */ error = __mxt_read_reg(client, object->start_address + MXT_T100_CFG1, @@ -2077,7 +2107,7 @@ static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x, struct mxt_dbg *dbg = &data->dbg; unsigned int ofs, page; - ofs = (y + (x * (data->info.matrix_ysize))) * sizeof(u16); + ofs = (y + (x * data->info.matrix_ysize)) * sizeof(u16); page = ofs / MXT_DIAGNOSTIC_SIZE; ofs %= MXT_DIAGNOSTIC_SIZE; @@ -2095,7 +2125,7 @@ static void mxt_convert_debug_pages(struct mxt_data *data) dbg->debug_buf[i] = mxt_get_debug_value(data, x, y); /* Next value */ - if (++x >= data->info.matrix_xsize) { + if (++x >= data->xsize) { x = 0; y++; } @@ -2213,9 +2243,10 @@ static void mxt_debugfs_init(struct mxt_data *data) } /* Calculate size of data and allocate buffer */ - dbg->t37_nodes = data->info.matrix_xsize * data->info.matrix_ysize; - dbg->t37_pages = dbg->t37_nodes * sizeof(u16) - / sizeof(dbg->t37_buf->data) + 1; + dbg->t37_nodes = data->xsize * data->ysize; + dbg->t37_pages = ((data->xsize * data->info.matrix_ysize) + * sizeof(u16) / sizeof(dbg->t37_buf->data)) + 1; + dbg->debug_buf = devm_kzalloc(&data->client->dev, dbg->t37_nodes * sizeof(u16), GFP_KERNEL); -- 2.5.0