Messages in this thread Patch in this message | | | From | Holger Dengler <> | Subject | [PATCH 03/11] mfd: flexcard: add device attributes | Date | Wed, 25 Mar 2015 10:51:52 +0100 |
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From: Benedikt Spranger <b.spranger@linutronix.de>
Add device attributes for common flexcard information access. The attribiutes are read-only execpt "uid" (user ID register). The "uid" attribute can also be used to change the user-defined ID of a Flexcard.
Signed-off-by: Holger Dengler <dengler@linutronix.de> Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de> cc: Samuel Ortiz <sameo@linux.intel.com> cc: Lee Jones <lee.jones@linaro.org> --- drivers/mfd/flexcard/Makefile | 2 +- drivers/mfd/flexcard/attr.c | 215 ++++++++++++++++++++++++++++++++++++++++ drivers/mfd/flexcard/core.c | 11 ++ drivers/mfd/flexcard/flexcard.h | 7 ++ 4 files changed, 234 insertions(+), 1 deletion(-) create mode 100644 drivers/mfd/flexcard/attr.c create mode 100644 drivers/mfd/flexcard/flexcard.h
diff --git a/drivers/mfd/flexcard/Makefile b/drivers/mfd/flexcard/Makefile index 6606ebb..101000f 100644 --- a/drivers/mfd/flexcard/Makefile +++ b/drivers/mfd/flexcard/Makefile @@ -1,2 +1,2 @@ obj-$(CONFIG_MFD_FLEXCARD) += flexcard.o -flexcard-objs := core.o +flexcard-objs := core.o attr.o diff --git a/drivers/mfd/flexcard/attr.c b/drivers/mfd/flexcard/attr.c new file mode 100644 index 0000000..c91c884 --- /dev/null +++ b/drivers/mfd/flexcard/attr.c @@ -0,0 +1,215 @@ +/* + * Eberspaecher Flexcard PMC II Carrier Board PCI Driver - device attributes + * + * Copyright (c) 2014,2015 Linutronix GmbH + * Author: Holger Dengler + * Benedikt Spranger + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ +#include <linux/device.h> +#include <linux/flexcard.h> +#include <linux/kref.h> +#include <linux/miscdevice.h> +#include <linux/pci.h> +#include <linux/mfd/flexcard.h> + +static ssize_t fw_version_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%02x.%02x.%02x\n", priv->conf->fc_fw_ver.maj, + priv->conf->fc_fw_ver.min, priv->conf->fc_fw_ver.dev); +} +static DEVICE_ATTR_RO(fw_version); + +static ssize_t hw_version_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%02x.%02x.%02x\n", priv->conf->fc_hw_ver.maj, + priv->conf->fc_hw_ver.min, priv->conf->fc_hw_ver.dev); +} +static DEVICE_ATTR_RO(hw_version); + +static ssize_t serialno_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%lld\n", priv->conf->fc_sn); +} +static DEVICE_ATTR_RO(serialno); + +static ssize_t tiny_stat_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "0x%x\n", priv->conf->tiny_stat); +} +static DEVICE_ATTR_RO(tiny_stat); + +static ssize_t can_dat_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->can_dat_cnt); +} +static DEVICE_ATTR_RO(can_dat); + +static ssize_t can_err_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->can_err_cnt); +} +static DEVICE_ATTR_RO(can_err); + +static ssize_t fc_data_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->fc_data_cnt); +} +static DEVICE_ATTR_RO(fc_data); + +static ssize_t fr_rx_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->fr_rx_cnt); +} +static DEVICE_ATTR_RO(fr_rx); + +static ssize_t fr_tx_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->fr_tx_cnt); +} +static DEVICE_ATTR_RO(fr_tx); + +static ssize_t nmv_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->nmv_cnt); +} +static DEVICE_ATTR_RO(nmv); + +static ssize_t info_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->info_cnt); +} +static DEVICE_ATTR_RO(info); + +static ssize_t stat_trg_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->stat_trg_cnt); +} +static DEVICE_ATTR_RO(stat_trg); + +static ssize_t nf_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%d\n", priv->conf->nf_cnt); +} +static DEVICE_ATTR_RO(nf); + +static ssize_t uid_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + unsigned long uid; + int ret; + + ret = kstrtou32(buf, 0, &uid); + if (ret) + return ret; + + priv->conf->fc_uid = uid; + return count; +} + +static ssize_t uid_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pci_dev *pdev = to_pci_dev(dev->parent); + struct flexcard_device *priv = pci_get_drvdata(pdev); + + return sprintf(buf, "%u\n", priv->conf->fc_uid); +} +static DEVICE_ATTR(uid, S_IRUGO|S_IWUSR, uid_show, uid_store); + +static struct attribute *flexcard_misc_dev_attrs[] = { + &dev_attr_fw_version.attr, + &dev_attr_hw_version.attr, + &dev_attr_serialno.attr, + &dev_attr_tiny_stat.attr, + &dev_attr_can_dat.attr, + &dev_attr_can_err.attr, + &dev_attr_fc_data.attr, + &dev_attr_fr_rx.attr, + &dev_attr_fr_tx.attr, + &dev_attr_nmv.attr, + &dev_attr_info.attr, + &dev_attr_stat_trg.attr, + &dev_attr_nf.attr, + &dev_attr_uid.attr, + NULL, +}; + +static const struct attribute_group flexcard_misc_dev_group = { + .attrs = flexcard_misc_dev_attrs, +}; + +int flexcard_misc_add_attrs(struct device *dev) +{ + int ret; + + ret = sysfs_create_group(&dev->kobj, + &flexcard_misc_dev_group); + + if (ret) + dev_err(dev, "failed to create sysfs attributes: %d\n", ret); + + return ret; +} + +void flexcard_misc_del_attrs(struct device *dev) +{ + sysfs_remove_group(&dev->kobj, &flexcard_misc_dev_group); +} diff --git a/drivers/mfd/flexcard/core.c b/drivers/mfd/flexcard/core.c index 1e7fb0f..6477019 100644 --- a/drivers/mfd/flexcard/core.c +++ b/drivers/mfd/flexcard/core.c @@ -22,6 +22,8 @@ #include <linux/mfd/core.h> #include <linux/mfd/flexcard.h> +#include "flexcard.h" + static DEFINE_IDA(flexcard_ida); static const char drv_name[] = "flexcard"; @@ -237,6 +239,12 @@ static int flexcard_probe(struct pci_dev *pdev, goto out_remove; } + ret = flexcard_misc_add_attrs(priv->dev.this_device); + if (ret) { + dev_err(&pdev->dev, "unable to register miscdevice: %d\n", ret); + goto out_deregister; + } + dev_info(&pdev->dev, "HW %02x.%02x.%02x FW %02x.%02x.%02x\n", priv->conf->fc_hw_ver.maj, priv->conf->fc_hw_ver.min, priv->conf->fc_hw_ver.dev, priv->conf->fc_fw_ver.maj, @@ -244,6 +252,8 @@ static int flexcard_probe(struct pci_dev *pdev, return 0; +out_deregister: + misc_deregister(&priv->dev); out_remove: mfd_remove_devices(&pdev->dev); out_unmap: @@ -264,6 +274,7 @@ static void flexcard_remove(struct pci_dev *pdev) { struct flexcard_device *priv = pci_get_drvdata(pdev); + flexcard_misc_del_attrs(priv->dev.this_device); misc_deregister(&priv->dev); mfd_remove_devices(&pdev->dev); iounmap(priv->conf); diff --git a/drivers/mfd/flexcard/flexcard.h b/drivers/mfd/flexcard/flexcard.h new file mode 100644 index 0000000..1fe451e --- /dev/null +++ b/drivers/mfd/flexcard/flexcard.h @@ -0,0 +1,7 @@ +#ifndef __FLEXCARD_H +#define __FLEXCARD_H + +int flexcard_misc_add_attrs(struct device *dev); +void flexcard_misc_del_attrs(struct device *dev); + +#endif /* __FLEXCARD_H */ -- 2.1.4
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