The reset line from the Asix chip to the SJA1000 is asserted after boot up
until it is deasserted by a register write
Signed-off-by: Gerhard Uttenthaler <uttenthaler@xxxxxxxxxxxxxxxx>
---
drivers/net/can/sja1000/ems_pci.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c
index 73f3ca9ebe02..e720b7f3db34 100644
--- a/drivers/net/can/sja1000/ems_pci.c
+++ b/drivers/net/can/sja1000/ems_pci.c
@@ -326,6 +326,14 @@ static int ems_pci_add_card(struct pci_dev *pdev,
}
}
+ if (card->version == 3) {
+ /* ASIX chip asserts local reset to CAN controllers
+ * after bootup until it is deasserted
+ */
+ writel(readl(card->conf_addr + ASIX_LIEMR) & ~ASIX_LIEMR_LRST,
+ card->conf_addr + ASIX_LIEMR);
+ }
+
ems_pci_card_reset(card);
/* Detect available channels */
--
2.35.3
--
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Sonnenhang 3
85304 Ilmmuenster
HR Ingolstadt, HRA 170106
Phone: +49-8441-490260
Fax : +49-8441-81860
http://www.ems-wuensche.com
