diff options
| author | Gerhard Uttenthaler <uttenthaler@ems-wuensche.com> | 2023-01-20 14:26:15 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2023-02-02 19:33:51 +0300 |
| commit | 946c4135fd486f7036b8270207d14628b634097e (patch) | |
| tree | 9f6c2b7f1f1f787a2e8a7e7f1383c92f938d3f98 /drivers/net/can/sja1000 | |
| parent | 8b4339f76da76c3c907659189eb627e0fd03b4cf (diff) | |
| download | linux-946c4135fd486f7036b8270207d14628b634097e.tar.xz | |
can: ems_pci: Deassert hardware reset
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>
Diffstat (limited to 'drivers/net/can/sja1000')
| -rw-r--r-- | drivers/net/can/sja1000/ems_pci.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/can/sja1000/ems_pci.c b/drivers/net/can/sja1000/ems_pci.c index 1f237acd7bd1..212d051c53c0 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 */ |