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can: ems_pci: Deassert hardware reset

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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@ems-wuensche.com>
Link: https://lore.kernel.org/all/20230120112616.6071-8-uttenthaler@ems-wuensche.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Gerhard Uttenthaler 2023-01-20 12:26:15 +01:00 committed by Marc Kleine-Budde
parent 8b4339f76d
commit 946c4135fd
1 changed files with 8 additions and 0 deletions
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8
drivers/net/can/sja1000/ems_pci.c
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@ -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 */