From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] pata_pdc2027x: add Power Management support
Date: Thu, 13 Oct 2011 12:57:51 +0200 [thread overview]
Message-ID: <201110131257.51837.bzolnier@gmail.com> (raw)
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] pata_pdc2027x: add Power Management support
Fixes IDE -> libata regression.
There shouldn't be any problems with it as corresponding IDE's host
driver (pdc202xx_new) has been supporting PCI Power Management since
Oct 10 2008 (commit feb22b7f "ide: add proper PCI PM support (v2)")
and IDE PM since Jun 14 2003 (patch v2.5.73 "ide: Power Management").
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
earlier references:
https://lkml.org/lkml/2009/11/25/369
drivers/ata/pata_pdc2027x.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
Index: b/drivers/ata/pata_pdc2027x.c
===================================================================
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -63,6 +63,7 @@ enum {
};
static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
+static int pdc2027x_reinit_one(struct pci_dev *pdev);
static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline);
static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);
static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
@@ -126,6 +127,10 @@ static struct pci_driver pdc2027x_pci_dr
.id_table = pdc2027x_pci_tbl,
.probe = pdc2027x_init_one,
.remove = ata_pci_remove_one,
+#ifdef CONFIG_PM
+ .suspend = ata_pci_device_suspend,
+ .resume = pdc2027x_reinit_one,
+#endif
};
static struct scsi_host_template pdc2027x_sht = {
@@ -758,6 +763,31 @@ static int __devinit pdc2027x_init_one(s
IRQF_SHARED, &pdc2027x_sht);
}
+#ifdef CONFIG_PM
+static int pdc2027x_reinit_one(struct pci_dev *pdev)
+{
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ unsigned int board_idx;
+ int rc;
+
+ rc = ata_pci_device_do_resume(pdev);
+ if (rc)
+ return rc;
+
+ if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 ||
+ pdev->device == PCI_DEVICE_ID_PROMISE_20270)
+ board_idx = PDC_UDMA_100;
+ else
+ board_idx = PDC_UDMA_133;
+
+ if (pdc_hardware_init(host, board_idx))
+ return -EIO;
+
+ ata_host_resume(host);
+ return 0;
+}
+#endif
+
/**
* pdc2027x_init - Called after this module is loaded into the kernel.
*/
reply other threads:[~2011-10-13 10:57 UTC|newest]
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