Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753261AbcD1MOK (ORCPT ); Thu, 28 Apr 2016 08:14:10 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:12783 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752651AbcD1MOI (ORCPT ); Thu, 28 Apr 2016 08:14:08 -0400 From: To: , , , , CC: , , , , , , , , , , Patrice Chotard , , , Subject: [PATCH v2 03/10] gpio: stmpe: fix edge and rising/falling edge detection Date: Thu, 28 Apr 2016 14:13:02 +0200 Message-ID: <1461845589-4826-4-git-send-email-patrice.chotard@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1461845589-4826-1-git-send-email-patrice.chotard@st.com> References: <1461845589-4826-1-git-send-email-patrice.chotard@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.48.1.66] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-04-28_07:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4364 Lines: 142 From: Patrice Chotard By cross-checking STMPE 610/801/811/1601/2401/2403 datasheets, it appears that edge detection and rising/falling edge detection is not supported by all STMPE variant: GPIO GPIO Edge detection rising/falling edge detection 610 | X | X | 801 | | | 811 | X | X | 1600 | | | 1601 | X | X | 1801 | | X | 2401 | X | X | 2403 | X | X | Rework stmpe_dbg_show_one() and stmpe_gpio_irq to correctly take these cases into account. Signed-off-by: Patrice Chotard Reviewed-by: Linus Walleij --- drivers/gpio/gpio-stmpe.c | 85 +++++++++++++++++++++++++++++++++-------------- 1 file changed, 60 insertions(+), 25 deletions(-) diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c index 5197edf..bfc918c 100644 --- a/drivers/gpio/gpio-stmpe.c +++ b/drivers/gpio/gpio-stmpe.c @@ -231,39 +231,74 @@ static void stmpe_dbg_show_one(struct seq_file *s, gpio, label ?: "(none)", val ? "hi" : "lo"); } else { - u8 edge_det_reg = stmpe->regs[STMPE_IDX_GPEDR_MSB] + num_banks - 1 - (offset / 8); - u8 rise_reg = stmpe->regs[STMPE_IDX_GPRER_LSB] - (offset / 8); - u8 fall_reg = stmpe->regs[STMPE_IDX_GPFER_LSB] - (offset / 8); - u8 irqen_reg = stmpe->regs[STMPE_IDX_IEGPIOR_LSB] - (offset / 8); - bool edge_det; - bool rise; - bool fall; + u8 edge_det_reg; + u8 rise_reg; + u8 fall_reg; + u8 irqen_reg; + + char *edge_det_values[] = {"edge-inactive", + "edge-asserted", + "not-supported"}; + char *rise_values[] = {"no-rising-edge-detection", + "rising-edge-detection", + "not-supported"}; + char *fall_values[] = {"no-falling-edge-detection", + "falling-edge-detection", + "not-supported"}; + #define NOT_SUPPORTED_IDX 2 + u8 edge_det = NOT_SUPPORTED_IDX; + u8 rise = NOT_SUPPORTED_IDX; + u8 fall = NOT_SUPPORTED_IDX; bool irqen; - ret = stmpe_reg_read(stmpe, edge_det_reg); - if (ret < 0) - return; - edge_det = !!(ret & mask); - ret = stmpe_reg_read(stmpe, rise_reg); - if (ret < 0) + switch (stmpe->partnum) { + case STMPE610: + case STMPE811: + case STMPE1601: + case STMPE2401: + case STMPE2403: + edge_det_reg = stmpe->regs[STMPE_IDX_GPEDR_MSB] + + num_banks - 1 - (offset / 8); + ret = stmpe_reg_read(stmpe, edge_det_reg); + if (ret < 0) + return; + edge_det = !!(ret & mask); + + case STMPE1801: + rise_reg = stmpe->regs[STMPE_IDX_GPRER_LSB] - + (offset / 8); + fall_reg = stmpe->regs[STMPE_IDX_GPFER_LSB] - + (offset / 8); + ret = stmpe_reg_read(stmpe, rise_reg); + if (ret < 0) + return; + rise = !!(ret & mask); + ret = stmpe_reg_read(stmpe, fall_reg); + if (ret < 0) + return; + fall = !!(ret & mask); + + case STMPE801: + irqen_reg = stmpe->regs[STMPE_IDX_IEGPIOR_LSB] - + (offset / 8); + break; + + default: return; - rise = !!(ret & mask); - ret = stmpe_reg_read(stmpe, fall_reg); - if (ret < 0) - return; - fall = !!(ret & mask); + } + ret = stmpe_reg_read(stmpe, irqen_reg); if (ret < 0) return; irqen = !!(ret & mask); - seq_printf(s, " gpio-%-3d (%-20.20s) in %s %s %s%s%s", + seq_printf(s, " gpio-%-3d (%-20.20s) in %s %13s %13s %25s %25s", gpio, label ?: "(none)", val ? "hi" : "lo", - edge_det ? "edge-asserted" : "edge-inactive", - irqen ? "IRQ-enabled" : "", - rise ? " rising-edge-detection" : "", - fall ? " falling-edge-detection" : ""); + edge_det_values[edge_det], + irqen ? "IRQ-enabled" : "IRQ-disabled", + rise_values[rise], + fall_values[fall]); } } @@ -322,8 +357,8 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev) stmpe_reg_write(stmpe, statmsbreg + i, status[i]); - /* Edge detect register is not present on 801 */ - if (stmpe->partnum != STMPE801) + /* Edge detect register is not present on 801 and 1801 */ + if (stmpe->partnum != STMPE801 || stmpe->partnum != STMPE1801) stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_GPEDR_MSB] + i, status[i]); } -- 1.9.1