hwmon: (pc87427) Add support for the second logical device
The second logical device contains the voltage and temperature registers. We have to extend the driver to support a second logical device before we can add support for these features. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Jean Delvare
parent
328716bc16
commit
9d32df192d
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@ -65,6 +65,7 @@ struct pc87427_data {
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};
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struct pc87427_sio_data {
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unsigned short address[2];
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u8 has_fanin;
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u8 has_fanout;
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};
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@ -608,6 +609,46 @@ static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
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* Device detection, attach and detach
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*/
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static void pc87427_release_regions(struct platform_device *pdev, int count)
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{
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struct resource *res;
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int i;
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for (i = 0; i < count; i++) {
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res = platform_get_resource(pdev, IORESOURCE_IO, i);
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release_region(res->start, resource_size(res));
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}
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}
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static int __devinit pc87427_request_regions(struct platform_device *pdev,
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int count)
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{
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struct resource *res;
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int i, err = 0;
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for (i = 0; i < count; i++) {
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res = platform_get_resource(pdev, IORESOURCE_IO, i);
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if (!res) {
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err = -ENOENT;
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dev_err(&pdev->dev, "Missing resource #%d\n", i);
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break;
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}
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if (!request_region(res->start, resource_size(res), DRVNAME)) {
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err = -EBUSY;
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dev_err(&pdev->dev,
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"Failed to request region 0x%lx-0x%lx\n",
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(unsigned long)res->start,
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(unsigned long)res->end);
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break;
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}
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}
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if (err && i)
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pc87427_release_regions(pdev, i);
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return err;
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}
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static void __devinit pc87427_init_device(struct device *dev)
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{
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struct pc87427_sio_data *sio_data = dev->platform_data;
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@ -664,9 +705,9 @@ static void __devinit pc87427_init_device(struct device *dev)
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static int __devinit pc87427_probe(struct platform_device *pdev)
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{
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struct pc87427_sio_data *sio_data = pdev->dev.platform_data;
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struct pc87427_data *data;
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struct resource *res;
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int i, err;
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int i, err, res_count;
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data = kzalloc(sizeof(struct pc87427_data), GFP_KERNEL);
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if (!data) {
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@ -675,16 +716,13 @@ static int __devinit pc87427_probe(struct platform_device *pdev)
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goto exit;
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}
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/* This will need to be revisited when we add support for
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temperature and voltage monitoring. */
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!request_region(res->start, resource_size(res), DRVNAME)) {
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err = -EBUSY;
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dev_err(&pdev->dev, "Failed to request region 0x%lx-0x%lx\n",
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(unsigned long)res->start, (unsigned long)res->end);
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data->address[0] = sio_data->address[0];
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data->address[1] = sio_data->address[1];
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res_count = (data->address[0] != 0) + (data->address[1] != 0);
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err = pc87427_request_regions(pdev, res_count);
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if (err)
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goto exit_kfree;
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}
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data->address[0] = res->start;
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mutex_init(&data->lock);
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data->name = "pc87427";
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@ -733,7 +771,7 @@ exit_remove_files:
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sysfs_remove_group(&pdev->dev.kobj, &pc87427_group_pwm[i]);
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}
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exit_release_region:
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release_region(res->start, resource_size(res));
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pc87427_release_regions(pdev, res_count);
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exit_kfree:
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platform_set_drvdata(pdev, NULL);
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kfree(data);
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@ -744,8 +782,9 @@ exit:
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static int __devexit pc87427_remove(struct platform_device *pdev)
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{
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struct pc87427_data *data = platform_get_drvdata(pdev);
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struct resource *res;
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int i;
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int i, res_count;
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res_count = (data->address[0] != 0) + (data->address[1] != 0);
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hwmon_device_unregister(data->hwmon_dev);
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device_remove_file(&pdev->dev, &dev_attr_name);
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@ -762,8 +801,7 @@ static int __devexit pc87427_remove(struct platform_device *pdev)
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platform_set_drvdata(pdev, NULL);
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kfree(data);
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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release_region(res->start, resource_size(res));
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pc87427_release_regions(pdev, res_count);
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return 0;
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}
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@ -778,29 +816,37 @@ static struct platform_driver pc87427_driver = {
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.remove = __devexit_p(pc87427_remove),
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};
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static int __init pc87427_device_add(unsigned short address,
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const struct pc87427_sio_data *sio_data)
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static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
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{
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struct resource res = {
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.start = address,
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.end = address + REGION_LENGTH - 1,
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.name = logdev_str[0],
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.flags = IORESOURCE_IO,
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struct resource res[2] = {
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{ .flags = IORESOURCE_IO },
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{ .flags = IORESOURCE_IO },
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};
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int err;
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int err, i, res_count;
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err = acpi_check_resource_conflict(&res);
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if (err)
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goto exit;
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res_count = 0;
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for (i = 0; i < 2; i++) {
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if (!sio_data->address[i])
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continue;
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res[res_count].start = sio_data->address[i];
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res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
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res[res_count].name = logdev_str[i];
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pdev = platform_device_alloc(DRVNAME, address);
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err = acpi_check_resource_conflict(&res[res_count]);
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if (err)
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goto exit;
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res_count++;
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}
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pdev = platform_device_alloc(DRVNAME, res[0].start);
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if (!pdev) {
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err = -ENOMEM;
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printk(KERN_ERR DRVNAME ": Device allocation failed\n");
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goto exit;
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}
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err = platform_device_add_resources(pdev, &res, 1);
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err = platform_device_add_resources(pdev, res, res_count);
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if (err) {
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printk(KERN_ERR DRVNAME ": Device resource addition failed "
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"(%d)\n", err);
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@ -829,8 +875,7 @@ exit:
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return err;
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}
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static int __init pc87427_find(int sioaddr, unsigned short *address,
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struct pc87427_sio_data *sio_data)
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static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
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{
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u16 val;
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u8 cfg, cfg_b;
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@ -844,7 +889,7 @@ static int __init pc87427_find(int sioaddr, unsigned short *address,
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}
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for (i = 0; i < 2; i++) {
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address[i] = 0;
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sio_data->address[i] = 0;
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/* Select logical device */
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superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
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@ -869,7 +914,13 @@ static int __init pc87427_find(int sioaddr, unsigned short *address,
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"for logical device 0x%02x\n", logdev[i]);
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continue;
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}
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address[i] = val;
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sio_data->address[i] = val;
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}
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/* No point in loading the driver if everything is disabled */
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if (!sio_data->address[0] && !sio_data->address[1]) {
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err = -ENODEV;
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goto exit;
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}
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/* Check which fan inputs are wired */
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@ -923,16 +974,10 @@ exit:
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static int __init pc87427_init(void)
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{
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int err;
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unsigned short address[2];
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struct pc87427_sio_data sio_data;
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if (pc87427_find(0x2e, address, &sio_data)
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&& pc87427_find(0x4e, address, &sio_data))
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return -ENODEV;
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/* For now the driver only handles fans so we only care about the
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first address. */
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if (!address[0])
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if (pc87427_find(0x2e, &sio_data)
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&& pc87427_find(0x4e, &sio_data))
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return -ENODEV;
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err = platform_driver_register(&pc87427_driver);
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@ -940,7 +985,7 @@ static int __init pc87427_init(void)
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goto exit;
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/* Sets global pdev as a side effect */
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err = pc87427_device_add(address[0], &sio_data);
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err = pc87427_device_add(&sio_data);
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if (err)
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goto exit_driver;
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