From patchwork Fri Mar 9 20:27:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 883978 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3zyf9m71zfz9sd1 for ; Sat, 10 Mar 2018 07:29:16 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3zyf9m5Hl8zF1vG for ; Sat, 10 Mar 2018 07:29:16 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com X-Original-To: openbmc@lists.ozlabs.org Delivered-To: openbmc@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.156.1; helo=mx0a-001b2d01.pphosted.com; envelope-from=eajames@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3zyf8M1kP8zF1rk for ; Sat, 10 Mar 2018 07:28:02 +1100 (AEDT) Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w29KOtk5096830 for ; Fri, 9 Mar 2018 15:28:00 -0500 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2gkw89htke-1 (version=TLSv1.2 cipher=AES256-SHA256 bits=256 verify=NOT) for ; Fri, 09 Mar 2018 15:28:00 -0500 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 9 Mar 2018 13:27:57 -0700 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w29KRuLq11338160; Fri, 9 Mar 2018 13:27:56 -0700 Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 751A96A03C; Fri, 9 Mar 2018 13:27:56 -0700 (MST) Received: from talon7.ibm.com (unknown [9.41.241.240]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP id 0A6736A03B; Fri, 9 Mar 2018 13:27:55 -0700 (MST) From: Eddie James To: openbmc@lists.ozlabs.org Subject: [PATCH linux dev-4.13 1/2] hwmon: (ucd9000) Add gpio chip interface Date: Fri, 9 Mar 2018 14:27:48 -0600 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1520627269-23227-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1520627269-23227-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18030920-0008-0000-0000-0000097018FF X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008642; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000254; SDB=6.01000671; UDB=6.00509014; IPR=6.00780001; MB=3.00019944; MTD=3.00000008; XFM=3.00000015; UTC=2018-03-09 20:27:58 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18030920-0009-0000-0000-00004654733F Message-Id: <1520627269-23227-2-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-03-09_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1803090242 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christopher Bostic , Andrew Jeffery , Eddie James Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" From: Christopher Bostic Add a struct gpio_chip and define some methods so that this device's I/O can be accessed via /sys/class/gpio. Signed-off-by: Christopher Bostic Signed-off-by: Andrew Jeffery Signed-off-by: Eddie James --- drivers/hwmon/pmbus/ucd9000.c | 220 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 220 insertions(+) diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c index b74dbec..e3a507f 100644 --- a/drivers/hwmon/pmbus/ucd9000.c +++ b/drivers/hwmon/pmbus/ucd9000.c @@ -27,6 +27,7 @@ #include #include #include +#include #include "pmbus.h" enum chips { ucd9000, ucd90120, ucd90124, ucd90160, ucd9090, ucd90910 }; @@ -35,8 +36,18 @@ #define UCD9000_NUM_PAGES 0xd6 #define UCD9000_FAN_CONFIG_INDEX 0xe7 #define UCD9000_FAN_CONFIG 0xe8 +#define UCD9000_GPIO_SELECT 0xfa +#define UCD9000_GPIO_CONFIG 0xfb #define UCD9000_DEVICE_ID 0xfd +/* GPIO CONFIG bits */ +#define UCD9000_GPIO_CONFIG_ENABLE BIT(0) +#define UCD9000_GPIO_CONFIG_OUT_ENABLE BIT(1) +#define UCD9000_GPIO_CONFIG_OUT_VALUE BIT(2) +#define UCD9000_GPIO_CONFIG_STATUS BIT(3) +#define UCD9000_GPIO_INPUT 0 +#define UCD9000_GPIO_OUTPUT 1 + #define UCD9000_MON_TYPE(x) (((x) >> 5) & 0x07) #define UCD9000_MON_PAGE(x) ((x) & 0x0f) @@ -47,9 +58,15 @@ #define UCD9000_NUM_FAN 4 +#define UCD9000_GPIO_NAME_LEN 16 +#define UCD9090_NUM_GPIOS 23 +#define UCD901XX_NUM_GPIOS 26 +#define UCD90910_NUM_GPIOS 26 + struct ucd9000_data { u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX]; struct pmbus_driver_info info; + struct gpio_chip gpio; }; #define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info) @@ -149,6 +166,168 @@ static int ucd9000_read_byte_data(struct i2c_client *client, int page, int reg) }; MODULE_DEVICE_TABLE(of, ucd9000_of_match); +static int ucd9000_gpio_read_config(struct i2c_client *client, + unsigned int offset) +{ + int ret; + + /* No page set required */ + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_SELECT, offset); + if (ret < 0) { + dev_err(&client->dev, "Failed to select GPIO %d: %d\n", offset, + ret); + + return ret; + } + + return i2c_smbus_read_byte_data(client, UCD9000_GPIO_CONFIG); +} + +static int ucd9000_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) { + dev_err(&client->dev, "failed to read GPIO %d config: %d\n", + offset, ret); + + return ret; + } + + return !!(ret & UCD9000_GPIO_CONFIG_STATUS); +} + +static void ucd9000_gpio_set(struct gpio_chip *gc, unsigned int offset, + int value) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) { + dev_err(&client->dev, "failed to read GPIO %d config: %d\n", + offset, ret); + + return; + } + + if (value) { + if (ret & UCD9000_GPIO_CONFIG_STATUS) + return; + + ret |= UCD9000_GPIO_CONFIG_STATUS; + } else { + if (!(ret & UCD9000_GPIO_CONFIG_STATUS)) + return; + + ret &= ~UCD9000_GPIO_CONFIG_STATUS; + } + + ret |= UCD9000_GPIO_CONFIG_ENABLE; + + /* Page set not required */ + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret); + if (ret < 0) { + dev_err(&client->dev, "Failed to write GPIO %d config: %d\n", + offset, ret); + + return; + } + + ret &= ~UCD9000_GPIO_CONFIG_ENABLE; + + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, ret); + if (ret < 0) + dev_err(&client->dev, "Failed to write GPIO %d config: %d\n", + offset, ret); +} + +static int ucd9000_gpio_get_direction(struct gpio_chip *gc, + unsigned int offset) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) { + dev_err(&client->dev, "failed to read GPIO %d config: %d\n", + offset, ret); + + return ret; + } + + return !(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE); +} + +static int ucd9000_gpio_set_direction(struct gpio_chip *gc, + unsigned int offset, bool direction_out, + int requested_out) +{ + struct i2c_client *client = gpiochip_get_data(gc); + int ret, config, out_val; + + ret = ucd9000_gpio_read_config(client, offset); + if (ret < 0) { + dev_err(&client->dev, "failed to read GPIO %d config: %d\n", + offset, ret); + + return ret; + } + + if (direction_out) { + out_val = requested_out ? UCD9000_GPIO_CONFIG_OUT_VALUE : 0; + + if (ret & UCD9000_GPIO_CONFIG_OUT_ENABLE) { + if ((ret & UCD9000_GPIO_CONFIG_OUT_VALUE) == out_val) + return 0; + } else { + ret |= UCD9000_GPIO_CONFIG_OUT_ENABLE; + } + + if (out_val) + ret |= UCD9000_GPIO_CONFIG_OUT_VALUE; + else + ret &= ~UCD9000_GPIO_CONFIG_OUT_VALUE; + + } else { + if (!(ret & UCD9000_GPIO_CONFIG_OUT_ENABLE)) + return 0; + + ret &= ~UCD9000_GPIO_CONFIG_OUT_ENABLE; + } + + ret |= UCD9000_GPIO_CONFIG_ENABLE; + config = ret; + + /* Page set not required */ + ret = i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config); + if (ret < 0) { + dev_err(&client->dev, "Failed to write GPIO %d config: %d\n", + offset, ret); + + return ret; + } + + config &= ~UCD9000_GPIO_CONFIG_ENABLE; + + return i2c_smbus_write_byte_data(client, UCD9000_GPIO_CONFIG, config); +} + +static int ucd9000_gpio_direction_input(struct gpio_chip *gc, + unsigned int offset) +{ + return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_INPUT, 0); +} + +static int ucd9000_gpio_direction_output(struct gpio_chip *gc, + unsigned int offset, int val) +{ + return ucd9000_gpio_set_direction(gc, offset, UCD9000_GPIO_OUTPUT, + val); +} + static int ucd9000_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -263,6 +442,47 @@ static int ucd9000_probe(struct i2c_client *client, | PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34; } + /* + * Note: + * + * Pinmux support has not been added to the new gpio_chip. + * This support should be added when possible given the mux + * behavior of these IO devices. + */ + data->gpio.label = (const char *)&client->name; + data->gpio.get_direction = ucd9000_gpio_get_direction; + data->gpio.direction_input = ucd9000_gpio_direction_input; + data->gpio.direction_output = ucd9000_gpio_direction_output; + data->gpio.get = ucd9000_gpio_get; + data->gpio.set = ucd9000_gpio_set; + data->gpio.can_sleep = 1; + data->gpio.base = -1; + + /* No default case. No data available for ucd9000. */ + switch (mid->driver_data) { + case ucd9090: + data->gpio.ngpio = UCD9090_NUM_GPIOS; + break; + case ucd90120: + case ucd90124: + case ucd90160: + data->gpio.ngpio = UCD901XX_NUM_GPIOS; + break; + case ucd90910: + data->gpio.ngpio = UCD90910_NUM_GPIOS; + break; + } + + data->gpio.parent = &client->dev; + data->gpio.owner = THIS_MODULE; + + ret = devm_gpiochip_add_data(&client->dev, &data->gpio, client); + if (ret) { + data->gpio.parent = NULL; + dev_warn(&client->dev, "Could not add gpiochip: %d\n", ret); + return ret; + } + return pmbus_do_probe(client, mid, info); } From patchwork Fri Mar 9 20:27:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 883981 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [103.22.144.68]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3zyfBR0pmGz9sd1 for ; Sat, 10 Mar 2018 07:29:51 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3zyfBQ6N2qzF1tb for ; Sat, 10 Mar 2018 07:29:50 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com X-Original-To: openbmc@lists.ozlabs.org Delivered-To: openbmc@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=eajames@linux.vnet.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.vnet.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3zyf8P5w70zF1vh for ; Sat, 10 Mar 2018 07:28:05 +1100 (AEDT) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w29KObj4081378 for ; Fri, 9 Mar 2018 15:28:03 -0500 Received: from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150]) by mx0a-001b2d01.pphosted.com with ESMTP id 2gkwwe7wv1-1 (version=TLSv1.2 cipher=AES256-SHA256 bits=256 verify=NOT) for ; Fri, 09 Mar 2018 15:28:02 -0500 Received: from localhost by e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 9 Mar 2018 13:27:59 -0700 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w29KRxAE10617298; Fri, 9 Mar 2018 13:27:59 -0700 Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 67A4E6A03C; Fri, 9 Mar 2018 13:27:59 -0700 (MST) Received: from talon7.ibm.com (unknown [9.41.241.240]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP id F35C76A03F; Fri, 9 Mar 2018 13:27:58 -0700 (MST) From: Eddie James To: openbmc@lists.ozlabs.org Subject: [PATCH linux dev-4.13 2/2] hwmon: (ucd9000) Add debugfs attributes to provide mfr_status Date: Fri, 9 Mar 2018 14:27:49 -0600 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1520627269-23227-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1520627269-23227-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18030920-0004-0000-0000-000013C7543E X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008642; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000254; SDB=6.01000671; UDB=6.00509014; IPR=6.00780001; MB=3.00019944; MTD=3.00000008; XFM=3.00000015; UTC=2018-03-09 20:28:01 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18030920-0005-0000-0000-000086667B8A Message-Id: <1520627269-23227-3-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2018-03-09_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1803090242 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Christopher Bostic , Andrew Jeffery , Eddie James Errors-To: openbmc-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "openbmc" From: Christopher Bostic Expose the gpiN_fault fields of mfr_status as individual debugfs attributes. This provides a way for users to be easily notified of gpi faults. Also provide the whole mfr_status register in debugfs. Signed-off-by: Christopher Bostic Signed-off-by: Andrew Jeffery Signed-off-by: Eddie James --- drivers/hwmon/pmbus/ucd9000.c | 172 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 171 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c index e3a507f..297da0e 100644 --- a/drivers/hwmon/pmbus/ucd9000.c +++ b/drivers/hwmon/pmbus/ucd9000.c @@ -19,6 +19,7 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ +#include #include #include #include @@ -36,6 +37,7 @@ #define UCD9000_NUM_PAGES 0xd6 #define UCD9000_FAN_CONFIG_INDEX 0xe7 #define UCD9000_FAN_CONFIG 0xe8 +#define UCD9000_MFR_STATUS 0xf3 #define UCD9000_GPIO_SELECT 0xfa #define UCD9000_GPIO_CONFIG 0xfb #define UCD9000_DEVICE_ID 0xfd @@ -63,13 +65,22 @@ #define UCD901XX_NUM_GPIOS 26 #define UCD90910_NUM_GPIOS 26 +#define UCD9000_DEBUGFS_NAME_LEN 24 +#define UCD9000_GPI_COUNT 8 + struct ucd9000_data { u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX]; struct pmbus_driver_info info; struct gpio_chip gpio; + struct dentry *debugfs; }; #define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info) +struct ucd9000_debugfs_entry { + struct i2c_client *client; + u8 index; +}; + static int ucd9000_get_fan_config(struct i2c_client *client, int fan) { int fan_config = 0; @@ -328,6 +339,156 @@ static int ucd9000_gpio_direction_output(struct gpio_chip *gc, val); } +#if IS_ENABLED(CONFIG_DEBUG_FS) +static int ucd9000_get_mfr_status(struct i2c_client *client, u8 *buffer) +{ + int ret = pmbus_set_page(client, 0); + + if (ret < 0) + return ret; + + /* + * With the ucd90120 and ucd90124 devices, this command [MFR_STATUS] + * is 2 bytes long (bits 0-15). With the ucd90240 this command is 5 + * bytes long. With all other devices, it is 4 bytes long. + */ + return i2c_smbus_read_block_data(client, UCD9000_MFR_STATUS, buffer); +} + +static int ucd9000_debugfs_show_mfr_status_bit(void *data, u64 *val) +{ + struct ucd9000_debugfs_entry *entry = data; + struct i2c_client *client = entry->client; + u8 buffer[4]; + int ret; + + /* + * This attribute is only created for devices that return 4 bytes for + * status_mfr, so it's safe to call with 4-byte buffer. + */ + ret = ucd9000_get_mfr_status(client, buffer); + if (ret < 0) { + dev_err(&client->dev, "Failed to read mfr status. rc:%d\n", + ret); + + return ret; + } + + /* + * Attribute only created for devices with gpi fault bits at bits + * 16-23, which is the second byte of the response. + */ + *val = !!(buffer[1] & BIT(entry->index)); + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_bit, + ucd9000_debugfs_show_mfr_status_bit, NULL, "%1lld\n"); + +static int ucd9000_debugfs_show_mfr_status_word2(void *data, u64 *val) +{ + struct i2c_client *client = data; + __be16 buffer; + int ret; + + ret = ucd9000_get_mfr_status(client, (u8 *)&buffer); + if (ret < 0) { + dev_err(&client->dev, "Failed to read mfr status. rc:%d\n", + ret); + + return ret; + } + + *val = be16_to_cpu(buffer); + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_word2, + ucd9000_debugfs_show_mfr_status_word2, NULL, + "%04llx\n"); + +static int ucd9000_debugfs_show_mfr_status_word4(void *data, u64 *val) +{ + struct i2c_client *client = data; + __be32 buffer; + int ret; + + ret = ucd9000_get_mfr_status(client, (u8 *)&buffer); + if (ret < 0) { + dev_err(&client->dev, "Failed to read mfr status. rc:%d\n", + ret); + + return ret; + } + + *val = be32_to_cpu(buffer); + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(ucd9000_debugfs_mfr_status_word4, + ucd9000_debugfs_show_mfr_status_word4, NULL, + "%08llx\n"); + +static int ucd9000_init_debugfs(struct i2c_client *client, + const struct i2c_device_id *mid, + struct ucd9000_data *data) +{ + struct dentry *debugfs; + struct ucd9000_debugfs_entry *entries; + int i; + char name[UCD9000_DEBUGFS_NAME_LEN]; + + debugfs = pmbus_get_debugfs_dir(client); + if (!debugfs) + return -ENOENT; + + data->debugfs = debugfs_create_dir(client->name, debugfs); + if (!data->debugfs) + return -ENOENT; + + /* + * Of the chips this driver supports, only the UCD9090, UCD90160, + * and UCD90910 report GPI faults in their MFR_STATUS register, so only + * create the GPI fault debugfs attributes for those chips. + */ + if (mid->driver_data == ucd9090 || mid->driver_data == ucd90160 || + mid->driver_data == ucd90910) { + entries = devm_kzalloc(&client->dev, + sizeof(*entries) * UCD9000_GPI_COUNT, + GFP_KERNEL); + if (!entries) + return -ENOMEM; + + for (i = 0; i < UCD9000_GPI_COUNT; i++) { + entries[i].client = client; + entries[i].index = i; + scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, + "gpi%d_alarm", i + 1); + debugfs_create_file(name, 0444, data->debugfs, + &entries[i], + &ucd9000_debugfs_mfr_status_bit); + } + + scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, "mfr_status"); + debugfs_create_file(name, 0444, data->debugfs, client, + &ucd9000_debugfs_mfr_status_word4); + } else if (mid->driver_data == ucd90120 || + mid->driver_data == ucd90124) { + scnprintf(name, UCD9000_DEBUGFS_NAME_LEN, "mfr_status"); + debugfs_create_file(name, 0444, data->debugfs, client, + &ucd9000_debugfs_mfr_status_word2); + } + + return 0; +} +#else +static int ucd9000_init_debugfs(struct i2c_client *client, + struct ucd9000_data *data) +{ + return 0; +} +#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */ + static int ucd9000_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -483,7 +644,16 @@ static int ucd9000_probe(struct i2c_client *client, return ret; } - return pmbus_do_probe(client, mid, info); + ret = pmbus_do_probe(client, mid, info); + if (ret) + return ret; + + ret = ucd9000_init_debugfs(client, mid, data); + if (ret) + dev_warn(&client->dev, "Failed to register debugfs: %d\n", + ret); + + return 0; } /* This is the driver that will be inserted */