| Message ID | 20240613-wilc_suspend-v1-1-c2f766d0988c@bootlin.com |
|---|---|
| State | New |
| Headers | show |
| Series | wifi: wilc1000: update power management | expand |
Alexis Lothoré <alexis.lothore@bootlin.com> wrote: > From: Ajay Singh <ajay.kathat@microchip.com> > > Driver systematically disables some power mechanism each time it starts the > chip firmware (so mostly when interface is brought up). This has a negative > impact on some specific scenarios when the chip is exposed as a > hotpluggable SDIO card (eg: WILC1000 SD): > - when executing suspend/resume sequence while interface has been brought > up > - rebooting the platform while module is plugged and interface has been > brought up > Those scenarios lead to mmc core trying to initialize again the chip which > is now unresponsive (because of the power sequencer setting), so it fails > in mmc_rescan->mmc_attach_sdio and enter a failure loop while trying to > send CMD5: > mmc0: error -110 whilst initialising SDIO card > mmc0: error -110 whilst initialising SDIO card > mmc0: error -110 whilst initialising SDIO card > [...] > > Preventing the driver from disabling this "power sequencer" fixes those > enumeration issues without affecting nominal operations. > > Signed-off-by: Ajay Singh <ajay.kathat@microchip.com> > Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com> 6 patches applied to wireless-next.git, thanks. 70ed0bdab1ca wifi: wilc1000: disable power sequencer 301e44e973eb wifi: wilc1000: let host->chip suspend/resume notifications manage chip wake/sleep 25d086ba1964 wifi: wilc1000: do not keep sdio bus claimed during suspend/resume a814112e9545 wifi: wilc1000: move sdio suspend method next to resume and pm ops definition 1e9e258d9fb5 wifi: wilc1000: remove suspend/resume from cfg80211 part 5ad8897fd15a wifi: wilc1000: disable SDIO func IRQ before suspend
diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c index e6e20c86b791..6461a3ec0120 100644 --- a/drivers/net/wireless/microchip/wilc1000/sdio.c +++ b/drivers/net/wireless/microchip/wilc1000/sdio.c @@ -907,27 +907,12 @@ static int wilc_sdio_sync_ext(struct wilc *wilc, int nint) { struct sdio_func *func = dev_to_sdio_func(wilc->dev); struct wilc_sdio *sdio_priv = wilc->bus_data; - u32 reg; if (nint > MAX_NUM_INT) { dev_err(&func->dev, "Too many interrupts (%d)...\n", nint); return -EINVAL; } - /** - * Disable power sequencer - **/ - if (wilc_sdio_read_reg(wilc, WILC_MISC, ®)) { - dev_err(&func->dev, "Failed read misc reg...\n"); - return -EINVAL; - } - - reg &= ~BIT(8); - if (wilc_sdio_write_reg(wilc, WILC_MISC, reg)) { - dev_err(&func->dev, "Failed write misc reg...\n"); - return -EINVAL; - } - if (sdio_priv->irq_gpio) { u32 reg; int ret, i; diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h index d72a0a81bbda..dd2fb3c2f06a 100644 --- a/drivers/net/wireless/microchip/wilc1000/wlan.h +++ b/drivers/net/wireless/microchip/wilc1000/wlan.h @@ -56,7 +56,6 @@ #define WILC_HOST_RX_CTRL (WILC_PERIPH_REG_BASE + 0x80) #define WILC_HOST_RX_EXTRA_SIZE (WILC_PERIPH_REG_BASE + 0x84) #define WILC_HOST_TX_CTRL_1 (WILC_PERIPH_REG_BASE + 0x88) -#define WILC_MISC (WILC_PERIPH_REG_BASE + 0x428) #define WILC_INTR_REG_BASE (WILC_PERIPH_REG_BASE + 0xa00) #define WILC_INTR_ENABLE WILC_INTR_REG_BASE #define WILC_INTR2_ENABLE (WILC_INTR_REG_BASE + 4)