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[4/4] cx23885: Override 888 ImpactVCBe crystal frequency

Message ID 1518479048-10192-5-git-send-email-brad@nextdimension.cc (mailing list archive)
State New, archived
Headers show

Commit Message

Brad Love Feb. 12, 2018, 11:44 p.m. UTC 
Hauppauge produced a revision of ImpactVCBe using an 888,
with a 25MHz crystal, instead of using the default third
overtone 50Mhz crystal. This overrides that frequency so
that the cx25840 is properly configured.

Signed-off-by: Brad Love <brad@nextdimension.cc>
---
 drivers/media/pci/cx23885/cx23885-core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/drivers/media/pci/cx23885/cx23885-core.c b/drivers/media/pci/cx23885/cx23885-core.c
index 2c76a02..101904b 100644
--- a/drivers/media/pci/cx23885/cx23885-core.c
+++ b/drivers/media/pci/cx23885/cx23885-core.c
@@ -881,6 +881,16 @@  static int cx23885_dev_setup(struct cx23885_dev *dev)
 	if (cx23885_boards[dev->board].clk_freq > 0)
 		dev->clk_freq = cx23885_boards[dev->board].clk_freq;
 
+	if (dev->board == CX23885_BOARD_HAUPPAUGE_IMPACTVCBE &&
+		dev->pci->subsystem_device == 0x7137) {
+		/* Hauppauge ImpactVCBe device ID 0x7137 is populated
+		 * with an 888, and a 25Mhz crystal, instead of the
+		 * usual third overtone 50Mhz. The default clock rate must
+		 * be overridden so the cx25840 is properly configured
+		 */
+		dev->clk_freq = 25000000;
+	}
+
 	dev->pci_bus  = dev->pci->bus->number;
 	dev->pci_slot = PCI_SLOT(dev->pci->devfn);
 	cx23885_irq_add(dev, 0x001f00);