diff options
| author | Ajay Singh <ajay.kathat@microchip.com> | 2021-09-16 19:49:20 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2021-09-21 18:08:16 +0300 |
| commit | c2dcb4766bcb1e3622d7579ee9d57f28dc2c2f2e (patch) | |
| tree | 18ce6daefbc5af56d5cd8b309fbe37cc1429798d /drivers/net/wireless/microchip/wilc1000/wlan.c | |
| parent | 1bcc0879c963770c90bc07d9aa5d0d50dda925f3 (diff) | |
| download | linux-c2dcb4766bcb1e3622d7579ee9d57f28dc2c2f2e.tar.xz | |
wilc1000: handle read failure issue for clockless registers
For SPI bus, the register read fails after read/write to the clockless
register during chip wakeup sequence. Add workaround to send CMD_RESET
command during chip wake-up sequence to overcome the issue.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210916164902.74629-7-ajay.kathat@microchip.com
Diffstat (limited to 'drivers/net/wireless/microchip/wilc1000/wlan.c')
| -rw-r--r-- | drivers/net/wireless/microchip/wilc1000/wlan.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c index 1aad537c468f..f9256c1bad45 100644 --- a/drivers/net/wireless/microchip/wilc1000/wlan.c +++ b/drivers/net/wireless/microchip/wilc1000/wlan.c @@ -669,6 +669,11 @@ void chip_wakeup(struct wilc *wilc) pr_err("Failed to wake-up the chip\n"); return; } + /* Sometimes spi fail to read clock regs after reading + * writing clockless registers + */ + if (wilc->io_type == WILC_HIF_SPI) + wilc->hif_func->hif_reset(wilc); } EXPORT_SYMBOL_GPL(chip_wakeup); |