[PATCH v3 1/5] dt-bindings: wireless: wilc1000: Document WILC3000 compatible string

[PATCH v3 1/5] dt-bindings: wireless: wilc1000: Document WILC3000 compatible string

[Marek Vasut]

Document compatible string for the WILC3000 chip. The chip is similar
to WILC1000, except that the register layout is slightly different and
it does not support WPA3/SAE.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
Cc: Ajay Singh <ajay.kathat@microchip.com>
Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Marek Vasut <marex@denx.de>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
---
V2: - Use WILC1000 as fallback compatible string for WILC3000
V3: - Swap the wilc1000/wilc3000 compatible order
---
 .../bindings/net/wireless/microchip,wilc1000.yaml           | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/wireless/microchip,wilc1000.yaml b/Documentation/devicetree/bindings/net/wireless/microchip,wilc1000.yaml
index 2460ccc082371..5d40f22765bb6 100644
--- a/Documentation/devicetree/bindings/net/wireless/microchip,wilc1000.yaml
+++ b/Documentation/devicetree/bindings/net/wireless/microchip,wilc1000.yaml
@@ -16,7 +16,11 @@ description:
 
 properties:
   compatible:
-    const: microchip,wilc1000
+    oneOf:
+      - items:
+          - const: microchip,wilc3000
+          - const: microchip,wilc1000
+      - const: microchip,wilc1000
 
   reg: true
 
-- 
2.45.2

[PATCH v3 2/5] wifi: wilc1000: Fold wilc_get_chipid() into wlan.c

[Marek Vasut]

Do not use wilc_get_chipid() outside of wlan.c . Instead, call
wilc_get_chipid() right after the SDIO/SPI interface has been
initialized to cache the device chipid, and then use the cached
chipid throughout the driver. Make wilc_get_chipid() static and
remove its prototype from wlan.h . Make wilc_get_chipid() return
a proper return value instead of a chipid.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
Cc: Ajay Singh <ajay.kathat@microchip.com>
Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Marek Vasut <marex@denx.de>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
---
V2: New patch
V3: - Undo setup in wilc_wlan_init() if chip is neither wilc1000 or wilc3000
    - Make wilc_get_chipid() return proper return value
---
 .../net/wireless/microchip/wilc1000/sdio.c    | 13 ----
 .../net/wireless/microchip/wilc1000/wlan.c    | 74 +++++++++++--------
 .../net/wireless/microchip/wilc1000/wlan.h    |  1 -
 3 files changed, 43 insertions(+), 45 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c
index 41122199d51eb..90357c89ae29b 100644
--- a/drivers/net/wireless/microchip/wilc1000/sdio.c
+++ b/drivers/net/wireless/microchip/wilc1000/sdio.c
@@ -671,7 +671,6 @@ static int wilc_sdio_init(struct wilc *wilc, bool resume)
 	struct wilc_sdio *sdio_priv = wilc->bus_data;
 	struct sdio_cmd52 cmd;
 	int loop, ret;
-	u32 chipid;
 
 	/**
 	 *      function 0 csa enable
@@ -760,18 +759,6 @@ static int wilc_sdio_init(struct wilc *wilc, bool resume)
 		return ret;
 	}
 
-	/**
-	 *      make sure can read back chip id correctly
-	 **/
-	if (!resume) {
-		ret = wilc_sdio_read_reg(wilc, WILC_CHIPID, &chipid);
-		if (ret) {
-			dev_err(&func->dev, "Fail cmd read chip id...\n");
-			return ret;
-		}
-		dev_err(&func->dev, "chipid (%08x)\n", chipid);
-	}
-
 	sdio_priv->isinit = true;
 	return 0;
 }
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index 533939e71534a..5b7dd37267de0 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -1402,9 +1402,37 @@ int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
 	return ret;
 }
 
+static int wilc_get_chipid(struct wilc *wilc)
+{
+	u32 chipid = 0;
+	u32 rfrevid = 0;
+
+	if (wilc->chipid == 0) {
+		wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
+		wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
+					     &rfrevid);
+		if (!is_wilc1000(chipid)) {
+			wilc->chipid = 0;
+			return -EINVAL;
+		}
+		if (chipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
+			if (rfrevid != 0x1)
+				chipid = WILC_1000_BASE_ID_2A_REV1;
+		} else if (chipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
+			if (rfrevid == 0x4)
+				chipid = WILC_1000_BASE_ID_2B_REV1;
+			else if (rfrevid != 0x3)
+				chipid = WILC_1000_BASE_ID_2B_REV2;
+		}
+
+		wilc->chipid = chipid;
+	}
+
+	return 0;
+}
+
 static int init_chip(struct net_device *dev)
 {
-	u32 chipid;
 	u32 reg;
 	int ret = 0;
 	struct wilc_vif *vif = netdev_priv(dev);
@@ -1412,9 +1440,11 @@ static int init_chip(struct net_device *dev)
 
 	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 
-	chipid = wilc_get_chipid(wilc, true);
+	ret = wilc_get_chipid(wilc);
+	if (ret)
+		goto release;
 
-	if ((chipid & 0xfff) != 0xa0) {
+	if ((wilc->chipid & 0xfff) != 0xa0) {
 		ret = wilc->hif_func->hif_read_reg(wilc,
 						   WILC_CORTUS_RESET_MUX_SEL,
 						   &reg);
@@ -1445,34 +1475,6 @@ static int init_chip(struct net_device *dev)
 	return ret;
 }
 
-u32 wilc_get_chipid(struct wilc *wilc, bool update)
-{
-	u32 chipid = 0;
-	u32 rfrevid = 0;
-
-	if (wilc->chipid == 0 || update) {
-		wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
-		wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
-					     &rfrevid);
-		if (!is_wilc1000(chipid)) {
-			wilc->chipid = 0;
-			return wilc->chipid;
-		}
-		if (chipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
-			if (rfrevid != 0x1)
-				chipid = WILC_1000_BASE_ID_2A_REV1;
-		} else if (chipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
-			if (rfrevid == 0x4)
-				chipid = WILC_1000_BASE_ID_2B_REV1;
-			else if (rfrevid != 0x3)
-				chipid = WILC_1000_BASE_ID_2B_REV2;
-		}
-
-		wilc->chipid = chipid;
-	}
-	return wilc->chipid;
-}
-
 int wilc_load_mac_from_nv(struct wilc *wl)
 {
 	int ret = -EINVAL;
@@ -1535,9 +1537,19 @@ int wilc_wlan_init(struct net_device *dev)
 	if (!wilc->hif_func->hif_is_init(wilc)) {
 		acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 		ret = wilc->hif_func->hif_init(wilc, false);
+		if (!ret)
+			ret = wilc_get_chipid(wilc);
 		release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 		if (ret)
 			goto fail;
+
+		if (!is_wilc1000(wilc->chipid)) {
+			netdev_err(dev, "Unsupported chipid: %x\n", wilc->chipid);
+			ret = -EINVAL;
+			goto fail;
+		}
+
+		netdev_dbg(dev, "chipid (%08x)\n", wilc->chipid);
 	}
 
 	if (!wilc->vmm_table)
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h
index dd2fb3c2f06a2..ae187192a79c6 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.h
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.h
@@ -443,6 +443,5 @@ void chip_wakeup(struct wilc *wilc);
 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
 			 u32 count);
 int wilc_wlan_init(struct net_device *dev);
-u32 wilc_get_chipid(struct wilc *wilc, bool update);
 int wilc_load_mac_from_nv(struct wilc *wilc);
 #endif
-- 
2.45.2

[PATCH v3 3/5] wifi: wilc1000: Fold chip_allow_sleep()/chip_wakeup() into wlan.c

[Marek Vasut]

Neither chip_allow_sleep()/chip_wakeup() is used outside of wlan.c .
Make both functions static and remove both the exported symbol and
entries from wlan.h .

Make chip_allow_sleep() return error code in preparation for the
follow up patches.

Move acquire_bus() and release_bus() to avoid forward declaration
of chip_allow_sleep()/chip_wakeup().

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
Cc: Ajay Singh <ajay.kathat@microchip.com>
Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Marek Vasut <marex@denx.de>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
---
V2: New patch
V3: No change
---
 .../net/wireless/microchip/wilc1000/wlan.c    | 47 +++++++++----------
 .../net/wireless/microchip/wilc1000/wlan.h    |  2 -
 2 files changed, 23 insertions(+), 26 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index 5b7dd37267de0..d228c5df82628 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -12,20 +12,6 @@
 
 #define WAKE_UP_TRIAL_RETRY		10000
 
-static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
-{
-	mutex_lock(&wilc->hif_cs);
-	if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode)
-		chip_wakeup(wilc);
-}
-
-static inline void release_bus(struct wilc *wilc, enum bus_release release)
-{
-	if (release == WILC_BUS_RELEASE_ALLOW_SLEEP && wilc->power_save_mode)
-		chip_allow_sleep(wilc);
-	mutex_unlock(&wilc->hif_cs);
-}
-
 static void wilc_wlan_txq_remove(struct wilc *wilc, u8 q_num,
 				 struct txq_entry_t *tqe)
 {
@@ -555,7 +541,7 @@ static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
 	return rqe;
 }
 
-void chip_allow_sleep(struct wilc *wilc)
+static int chip_allow_sleep(struct wilc *wilc)
 {
 	u32 reg = 0;
 	const struct wilc_hif_func *hif_func = wilc->hif_func;
@@ -584,7 +570,7 @@ void chip_allow_sleep(struct wilc *wilc)
 	while (--trials) {
 		ret = hif_func->hif_read_reg(wilc, to_host_from_fw_reg, &reg);
 		if (ret)
-			return;
+			return ret;
 		if ((reg & to_host_from_fw_bit) == 0)
 			break;
 	}
@@ -594,28 +580,28 @@ void chip_allow_sleep(struct wilc *wilc)
 	/* Clear bit 1 */
 	ret = hif_func->hif_read_reg(wilc, wakeup_reg, &reg);
 	if (ret)
-		return;
+		return ret;
 	if (reg & wakeup_bit) {
 		reg &= ~wakeup_bit;
 		ret = hif_func->hif_write_reg(wilc, wakeup_reg, reg);
 		if (ret)
-			return;
+			return ret;
 	}
 
 	ret = hif_func->hif_read_reg(wilc, from_host_to_fw_reg, &reg);
 	if (ret)
-		return;
+		return ret;
 	if (reg & from_host_to_fw_bit) {
 		reg &= ~from_host_to_fw_bit;
 		ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg, reg);
 		if (ret)
-			return;
-
+			return ret;
 	}
+
+	return 0;
 }
-EXPORT_SYMBOL_GPL(chip_allow_sleep);
 
-void chip_wakeup(struct wilc *wilc)
+static void chip_wakeup(struct wilc *wilc)
 {
 	u32 ret = 0;
 	u32 clk_status_val = 0, trials = 0;
@@ -674,7 +660,20 @@ void chip_wakeup(struct wilc *wilc)
 	if (wilc->io_type == WILC_HIF_SPI)
 		wilc->hif_func->hif_reset(wilc);
 }
-EXPORT_SYMBOL_GPL(chip_wakeup);
+
+static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
+{
+	mutex_lock(&wilc->hif_cs);
+	if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode)
+		chip_wakeup(wilc);
+}
+
+static inline void release_bus(struct wilc *wilc, enum bus_release release)
+{
+	if (release == WILC_BUS_RELEASE_ALLOW_SLEEP && wilc->power_save_mode)
+		chip_allow_sleep(wilc);
+	mutex_unlock(&wilc->hif_cs);
+}
 
 void host_wakeup_notify(struct wilc *wilc)
 {
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h
index ae187192a79c6..e75a5c8aaecec 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.h
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.h
@@ -438,8 +438,6 @@ void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size);
 bool wilc_wfi_mgmt_frame_rx(struct wilc_vif *vif, u8 *buff, u32 size);
 void host_wakeup_notify(struct wilc *wilc);
 void host_sleep_notify(struct wilc *wilc);
-void chip_allow_sleep(struct wilc *wilc);
-void chip_wakeup(struct wilc *wilc);
 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
 			 u32 count);
 int wilc_wlan_init(struct net_device *dev);
-- 
2.45.2

[PATCH v3 4/5] wifi: wilc1000: Fill in missing error handling

[Marek Vasut]

Add error handling to chip_wakeup() and propagate the errors throughout
the entire driver. Add error handling to acquire_bus()/release_bus() and
host_sleep_notify()/host_wakeup_notify() functions as a result as well.
Fill the error handling to all call sites.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
Cc: Ajay Singh <ajay.kathat@microchip.com>
Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Marek Vasut <marex@denx.de>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
---
V3: New patch
---
 .../net/wireless/microchip/wilc1000/sdio.c    |  11 +-
 .../net/wireless/microchip/wilc1000/wlan.c    | 154 +++++++++++++-----
 .../net/wireless/microchip/wilc1000/wlan.h    |   4 +-
 3 files changed, 118 insertions(+), 51 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c
index 90357c89ae29b..c26447289b71b 100644
--- a/drivers/net/wireless/microchip/wilc1000/sdio.c
+++ b/drivers/net/wireless/microchip/wilc1000/sdio.c
@@ -960,6 +960,7 @@ static int wilc_sdio_suspend(struct device *dev)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
 	struct wilc *wilc = sdio_get_drvdata(func);
+	int ret;
 
 	dev_info(dev, "sdio suspend\n");
 
@@ -969,7 +970,11 @@ static int wilc_sdio_suspend(struct device *dev)
 	if (!IS_ERR(wilc->rtc_clk))
 		clk_disable_unprepare(wilc->rtc_clk);
 
-	host_sleep_notify(wilc);
+	ret = host_sleep_notify(wilc);
+	if (ret) {
+		clk_prepare_enable(wilc->rtc_clk);
+		return ret;
+	}
 
 	wilc_sdio_disable_interrupt(wilc);
 
@@ -992,9 +997,7 @@ static int wilc_sdio_resume(struct device *dev)
 	wilc_sdio_init(wilc, true);
 	wilc_sdio_enable_interrupt(wilc);
 
-	host_wakeup_notify(wilc);
-
-	return 0;
+	return host_wakeup_notify(wilc);
 }
 
 static const struct of_device_id wilc_of_match[] = {
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index d228c5df82628..01476f8ecc36f 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -601,7 +601,7 @@ static int chip_allow_sleep(struct wilc *wilc)
 	return 0;
 }
 
-static void chip_wakeup(struct wilc *wilc)
+static int chip_wakeup(struct wilc *wilc)
 {
 	u32 ret = 0;
 	u32 clk_status_val = 0, trials = 0;
@@ -630,20 +630,20 @@ static void chip_wakeup(struct wilc *wilc)
 	ret = hif_func->hif_write_reg(wilc, from_host_to_fw_reg,
 				      from_host_to_fw_bit);
 	if (ret)
-		return;
+		return ret;
 
 	/* Set wake-up bit */
 	ret = hif_func->hif_write_reg(wilc, wakeup_reg,
 				      wakeup_bit);
 	if (ret)
-		return;
+		return ret;
 
 	while (trials < WAKE_UP_TRIAL_RETRY) {
 		ret = hif_func->hif_read_reg(wilc, clk_status_reg,
 					     &clk_status_val);
 		if (ret) {
 			pr_err("Bus error %d %x\n", ret, clk_status_val);
-			return;
+			return ret;
 		}
 		if (clk_status_val & clk_status_bit)
 			break;
@@ -652,42 +652,63 @@ static void chip_wakeup(struct wilc *wilc)
 	}
 	if (trials >= WAKE_UP_TRIAL_RETRY) {
 		pr_err("Failed to wake-up the chip\n");
-		return;
+		return -ETIMEDOUT;
 	}
 	/* 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);
+
+	return 0;
 }
 
-static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
+static inline int acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
 {
+	int ret = 0;
+
 	mutex_lock(&wilc->hif_cs);
-	if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode)
-		chip_wakeup(wilc);
+	if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP && wilc->power_save_mode) {
+		ret = chip_wakeup(wilc);
+		if (ret)
+			mutex_unlock(&wilc->hif_cs);
+	}
+
+	return ret;
 }
 
-static inline void release_bus(struct wilc *wilc, enum bus_release release)
+static inline int release_bus(struct wilc *wilc, enum bus_release release)
 {
+	int ret = 0;
+
 	if (release == WILC_BUS_RELEASE_ALLOW_SLEEP && wilc->power_save_mode)
-		chip_allow_sleep(wilc);
+		ret = chip_allow_sleep(wilc);
 	mutex_unlock(&wilc->hif_cs);
+
+	return ret;
 }
 
-void host_wakeup_notify(struct wilc *wilc)
+int host_wakeup_notify(struct wilc *wilc)
 {
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	int ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+	if (ret)
+		return ret;
+
 	wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1);
-	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 }
 EXPORT_SYMBOL_GPL(host_wakeup_notify);
 
-void host_sleep_notify(struct wilc *wilc)
+int host_sleep_notify(struct wilc *wilc)
 {
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	int ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+	if (ret)
+		return ret;
+
 	wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1);
-	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 }
 EXPORT_SYMBOL_GPL(host_sleep_notify);
 
@@ -714,6 +735,7 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 	int srcu_idx;
 	u8 *txb = wilc->tx_buffer;
 	struct wilc_vif *vif;
+	int rv;
 
 	if (wilc->quit)
 		goto out_update_cnt;
@@ -784,7 +806,10 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 		goto out_unlock;
 	vmm_table[i] = 0x0;
 
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret)
+		goto out_unlock;
+
 	counter = 0;
 	func = wilc->hif_func;
 	do {
@@ -859,7 +884,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 		goto out_release_bus;
 	}
 
-	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	ret = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	if (ret)
+		goto out_unlock;
 
 	offset = 0;
 	i = 0;
@@ -921,7 +948,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 	for (i = 0; i < NQUEUES; i++)
 		wilc->txq[i].fw.count += ac_pkt_num_to_chip[i];
 
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret)
+		goto out_unlock;
 
 	ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
 	if (ret)
@@ -930,7 +959,9 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 	ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
 
 out_release_bus:
-	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	if (!ret && rv)
+		ret = rv;
 
 out_unlock:
 	mutex_unlock(&wilc->txq_add_to_head_cs);
@@ -1059,8 +1090,14 @@ static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
 void wilc_handle_isr(struct wilc *wilc)
 {
 	u32 int_status;
+	int ret;
+
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret) {
+		dev_err_ratelimited(wilc->dev, "Cannot acquire bus\n");
+		return;
+	}
 
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 	wilc->hif_func->hif_read_int(wilc, &int_status);
 
 	if (int_status & DATA_INT_EXT)
@@ -1069,7 +1106,9 @@ void wilc_handle_isr(struct wilc *wilc)
 	if (!(int_status & (ALL_INT_EXT)))
 		wilc_unknown_isr_ext(wilc);
 
-	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	ret = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	if (ret)
+		dev_err_ratelimited(wilc->dev, "Cannot release bus\n");
 }
 EXPORT_SYMBOL_GPL(wilc_handle_isr);
 
@@ -1081,6 +1120,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 	u8 *dma_buffer;
 	int ret = 0;
 	u32 reg = 0;
+	int rv;
 
 	blksz = BIT(12);
 
@@ -1091,7 +1131,9 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 	offset = 0;
 	pr_debug("%s: Downloading firmware size = %d\n", __func__, buffer_size);
 
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret)
+		return ret;
 
 	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 	reg &= ~BIT(10);
@@ -1100,11 +1142,17 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 	if (reg & BIT(10))
 		pr_err("%s: Failed to reset\n", __func__);
 
-	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+	ret = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+	if (ret)
+		goto fail;
+
 	do {
 		addr = get_unaligned_le32(&buffer[offset]);
 		size = get_unaligned_le32(&buffer[offset + 4]);
-		acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+		ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+		if (ret)
+			goto fail;
+
 		offset += 8;
 		while (((int)size) && (offset < buffer_size)) {
 			if (size <= blksz)
@@ -1122,7 +1170,9 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 			offset += size2;
 			size -= size2;
 		}
-		release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+		rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+		if (!ret && rv)
+			ret = rv;
 
 		if (ret) {
 			pr_err("%s Bus error\n", __func__);
@@ -1141,7 +1191,7 @@ int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 int wilc_wlan_start(struct wilc *wilc)
 {
 	u32 reg = 0;
-	int ret;
+	int ret, rv;
 	u32 chipid;
 
 	if (wilc->io_type == WILC_HIF_SDIO) {
@@ -1150,7 +1200,10 @@ int wilc_wlan_start(struct wilc *wilc)
 	} else if (wilc->io_type == WILC_HIF_SPI) {
 		reg = 1;
 	}
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+	if (ret)
+		return ret;
+
 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
 	if (ret)
 		goto release;
@@ -1181,16 +1234,18 @@ int wilc_wlan_start(struct wilc *wilc)
 	wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 
 release:
-	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
-	return ret;
+	rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+	return ret ? ret : rv;
 }
 
 int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
 {
 	u32 reg = 0;
-	int ret;
+	int ret, rv;
 
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret)
+		return ret;
 
 	ret = wilc->hif_func->hif_read_reg(wilc, GLOBAL_MODE_CONTROL, &reg);
 	if (ret)
@@ -1226,9 +1281,9 @@ int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
 	ret = 0;
 release:
 	/* host comm is disabled - we can't issue sleep command anymore: */
-	release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+	rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 
-	return ret;
+	return ret ? ret : rv;
 }
 
 void wilc_wlan_cleanup(struct net_device *dev)
@@ -1433,11 +1488,13 @@ static int wilc_get_chipid(struct wilc *wilc)
 static int init_chip(struct net_device *dev)
 {
 	u32 reg;
-	int ret = 0;
+	int ret, rv;
 	struct wilc_vif *vif = netdev_priv(dev);
 	struct wilc *wilc = vif->wilc;
 
-	acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret)
+		return ret;
 
 	ret = wilc_get_chipid(wilc);
 	if (ret)
@@ -1469,17 +1526,19 @@ static int init_chip(struct net_device *dev)
 	}
 
 release:
-	release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 
-	return ret;
+	return ret ? ret : rv;
 }
 
 int wilc_load_mac_from_nv(struct wilc *wl)
 {
-	int ret = -EINVAL;
+	int ret, rv;
 	unsigned int i;
 
-	acquire_bus(wl, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	ret = acquire_bus(wl, WILC_BUS_ACQUIRE_AND_WAKEUP);
+	if (ret)
+		return ret;
 
 	for (i = 0; i < WILC_NVMEM_MAX_NUM_BANK; i++) {
 		int bank_offset = get_bank_offset_from_bank_index(i);
@@ -1518,14 +1577,14 @@ int wilc_load_mac_from_nv(struct wilc *wl)
 		break;
 	}
 
-	release_bus(wl, WILC_BUS_RELEASE_ALLOW_SLEEP);
-	return ret;
+	rv = release_bus(wl, WILC_BUS_RELEASE_ALLOW_SLEEP);
+	return ret ? ret : rv;
 }
 EXPORT_SYMBOL_GPL(wilc_load_mac_from_nv);
 
 int wilc_wlan_init(struct net_device *dev)
 {
-	int ret = 0;
+	int ret = 0, rv;
 	struct wilc_vif *vif = netdev_priv(dev);
 	struct wilc *wilc;
 
@@ -1534,11 +1593,16 @@ int wilc_wlan_init(struct net_device *dev)
 	wilc->quit = 0;
 
 	if (!wilc->hif_func->hif_is_init(wilc)) {
-		acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+		ret = acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+		if (ret)
+			return ret;
+
 		ret = wilc->hif_func->hif_init(wilc, false);
 		if (!ret)
 			ret = wilc_get_chipid(wilc);
-		release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+		rv = release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+		if (!ret && rv)
+			ret = rv;
 		if (ret)
 			goto fail;
 
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h
index e75a5c8aaecec..4e2b0c4ac1e21 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.h
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.h
@@ -436,8 +436,8 @@ netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *dev);
 
 void wilc_wfi_p2p_rx(struct wilc_vif *vif, u8 *buff, u32 size);
 bool wilc_wfi_mgmt_frame_rx(struct wilc_vif *vif, u8 *buff, u32 size);
-void host_wakeup_notify(struct wilc *wilc);
-void host_sleep_notify(struct wilc *wilc);
+int host_wakeup_notify(struct wilc *wilc);
+int host_sleep_notify(struct wilc *wilc);
 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
 			 u32 count);
 int wilc_wlan_init(struct net_device *dev);
-- 
2.45.2

[PATCH v3 5/5] wifi: wilc1000: Add WILC3000 support

[Marek Vasut]

From: Ajay Singh <ajay.kathat@microchip.com>

Add support for the WILC3000 chip. The chip is similar to WILC1000,
except that the register layout is slightly different and it does
not support WPA3/SAE.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Marek Vasut <marex@denx.de>
---
Note: Squashed and updated from the following downstream patches:
wifi: wilc1000: wilc3000 support added
wifi: wilc1000: wilc3000 interrupt handling
wifi: wilc1000: wilc3000 added chip wake and sleep support
wifi: wilc1000: wilc3000 FW file sepecific changes
---
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
Cc: Ajay Singh <ajay.kathat@microchip.com>
Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Marek Vasut <marex@denx.de>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Rob Herring <robh@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
---
V2: - Return -EINVAL in wilc_sdio_init() if chip ID is not supported
    - Dispose of wilc_chip_type, replace with is_wilc1000()/is_wilc3000()
    - Remove wilc3000 DT compatible string handling, match on wilc1000 only,
      the device type can be auto-detected based on chipID
V3: - Define and use WILC3000_BOOTROM_STATUS and WILC3000_CORTUS_BOOT_REGISTER_2
---
 .../wireless/microchip/wilc1000/cfg80211.c    |   7 +
 .../net/wireless/microchip/wilc1000/netdev.c  |  29 ++-
 .../net/wireless/microchip/wilc1000/sdio.c    |  62 ++++-
 drivers/net/wireless/microchip/wilc1000/spi.c |   2 +-
 .../net/wireless/microchip/wilc1000/wlan.c    | 220 +++++++++++++++---
 .../net/wireless/microchip/wilc1000/wlan.h    |  45 +++-
 6 files changed, 303 insertions(+), 62 deletions(-)

diff --git a/drivers/net/wireless/microchip/wilc1000/cfg80211.c b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
index eb37b228d54ea..69c66a7b41654 100644
--- a/drivers/net/wireless/microchip/wilc1000/cfg80211.c
+++ b/drivers/net/wireless/microchip/wilc1000/cfg80211.c
@@ -313,6 +313,13 @@ static int connect(struct wiphy *wiphy, struct net_device *dev,
 
 	vif->connecting = true;
 
+	if (sme->auth_type == NL80211_AUTHTYPE_SAE &&
+	    is_wilc3000(vif->wilc->chipid)) {
+		netdev_err(dev, "WILC3000: WPA3 not supported\n");
+		ret = -EOPNOTSUPP;
+		goto out_error;
+	}
+
 	cipher_group = sme->crypto.cipher_group;
 	if (cipher_group != 0) {
 		if (sme->crypto.wpa_versions & NL80211_WPA_VERSION_2) {
diff --git a/drivers/net/wireless/microchip/wilc1000/netdev.c b/drivers/net/wireless/microchip/wilc1000/netdev.c
index 9ecf3fb29b558..178f3241cef9f 100644
--- a/drivers/net/wireless/microchip/wilc1000/netdev.c
+++ b/drivers/net/wireless/microchip/wilc1000/netdev.c
@@ -23,6 +23,12 @@
 #define __WILC1000_FW(api)		WILC1000_FW_PREFIX #api ".bin"
 #define WILC1000_FW(api)		__WILC1000_FW(api)
 
+#define WILC3000_API_VER		1
+
+#define WILC3000_FW_PREFIX		"atmel/wilc3000_wifi_firmware-"
+#define __WILC3000_FW(api)		WILC3000_FW_PREFIX #api ".bin"
+#define WILC3000_FW(api)		__WILC3000_FW(api)
+
 static irqreturn_t isr_uh_routine(int irq, void *user_data)
 {
 	struct wilc *wilc = user_data;
@@ -195,20 +201,24 @@ static int wilc_wlan_get_firmware(struct net_device *dev)
 {
 	struct wilc_vif *vif = netdev_priv(dev);
 	struct wilc *wilc = vif->wilc;
-	int chip_id;
 	const struct firmware *wilc_fw;
+	char *firmware;
 	int ret;
 
-	chip_id = wilc_get_chipid(wilc, false);
+	if (is_wilc1000(wilc->chipid))
+		firmware = WILC1000_FW(WILC1000_API_VER);
+	else if (is_wilc3000(wilc->chipid))
+		firmware = WILC3000_FW(WILC3000_API_VER);
+	else
+		return -EINVAL;
 
-	netdev_info(dev, "ChipID [%x] loading firmware [%s]\n", chip_id,
+	netdev_info(dev, "WILC%d loading firmware [%s]\n",
+		    is_wilc1000(wilc->chipid) ? 1000 : 3000,
 		    WILC1000_FW(WILC1000_API_VER));
 
-	ret = request_firmware(&wilc_fw, WILC1000_FW(WILC1000_API_VER),
-			       wilc->dev);
+	ret = request_firmware(&wilc_fw, firmware, wilc->dev);
 	if (ret != 0) {
-		netdev_err(dev, "%s - firmware not available\n",
-			   WILC1000_FW(WILC1000_API_VER));
+		netdev_err(dev, "%s - firmware not available\n", firmware);
 		return -EINVAL;
 	}
 	wilc->firmware = wilc_fw;
@@ -233,7 +243,7 @@ static int wilc_start_firmware(struct net_device *dev)
 	return 0;
 }
 
-static int wilc1000_firmware_download(struct net_device *dev)
+static int wilc_firmware_download(struct net_device *dev)
 {
 	struct wilc_vif *vif = netdev_priv(dev);
 	struct wilc *wilc = vif->wilc;
@@ -528,7 +538,7 @@ static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
 		if (ret)
 			goto fail_irq_enable;
 
-		ret = wilc1000_firmware_download(dev);
+		ret = wilc_firmware_download(dev);
 		if (ret)
 			goto fail_irq_enable;
 
@@ -1014,3 +1024,4 @@ EXPORT_SYMBOL_GPL(wilc_netdev_ifc_init);
 MODULE_DESCRIPTION("Atmel WILC1000 core wireless driver");
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));
+MODULE_FIRMWARE(WILC3000_FW(WILC3000_API_VER));
diff --git a/drivers/net/wireless/microchip/wilc1000/sdio.c b/drivers/net/wireless/microchip/wilc1000/sdio.c
index c26447289b71b..983debb3c626b 100644
--- a/drivers/net/wireless/microchip/wilc1000/sdio.c
+++ b/drivers/net/wireless/microchip/wilc1000/sdio.c
@@ -806,13 +806,19 @@ static int wilc_sdio_read_int(struct wilc *wilc, u32 *int_status)
 		cmd.address = WILC_SDIO_EXT_IRQ_FLAG_REG;
 	} else {
 		cmd.function = 0;
-		cmd.address = WILC_SDIO_IRQ_FLAG_REG;
+		cmd.address = is_wilc1000(wilc->chipid) ?
+			      WILC1000_SDIO_IRQ_FLAG_REG :
+			      WILC3000_SDIO_IRQ_FLAG_REG;
 	}
 	cmd.raw = 0;
 	cmd.read_write = 0;
 	cmd.data = 0;
 	wilc_sdio_cmd52(wilc, &cmd);
 	irq_flags = cmd.data;
+
+	if (sdio_priv->irq_gpio)
+		irq_flags &= is_wilc1000(wilc->chipid) ? 0x1f : 0x0f;
+
 	tmp |= FIELD_PREP(IRG_FLAGS_MASK, cmd.data);
 
 	if (FIELD_GET(UNHANDLED_IRQ_MASK, irq_flags))
@@ -834,22 +840,56 @@ static int wilc_sdio_clear_int_ext(struct wilc *wilc, u32 val)
 	if (sdio_priv->irq_gpio)
 		reg = val & (BIT(MAX_NUM_INT) - 1);
 
-	/* select VMM table 0 */
-	if (val & SEL_VMM_TBL0)
-		reg |= BIT(5);
-	/* select VMM table 1 */
-	if (val & SEL_VMM_TBL1)
-		reg |= BIT(6);
-	/* enable VMM */
-	if (val & EN_VMM)
-		reg |= BIT(7);
+	if (is_wilc1000(wilc->chipid)) {
+		/* select VMM table 0 */
+		if (val & SEL_VMM_TBL0)
+			reg |= BIT(5);
+		/* select VMM table 1 */
+		if (val & SEL_VMM_TBL1)
+			reg |= BIT(6);
+		/* enable VMM */
+		if (val & EN_VMM)
+			reg |= BIT(7);
+	} else {
+		if (sdio_priv->irq_gpio && reg) {
+			struct sdio_cmd52 cmd;
+
+			cmd.read_write = 1;
+			cmd.function = 0;
+			cmd.raw = 0;
+			cmd.address = WILC3000_SDIO_IRQ_FLAG_REG;
+			cmd.data = reg;
+
+			ret = wilc_sdio_cmd52(wilc, &cmd);
+			if (ret) {
+				dev_err(&func->dev,
+					"Failed cmd52, set 0xfe data (%d) ...\n",
+					__LINE__);
+				return ret;
+			}
+		}
+
+		reg = 0;
+		/* select VMM table 0 */
+		if (val & SEL_VMM_TBL0)
+			reg |= BIT(0);
+		/* select VMM table 1 */
+		if (val & SEL_VMM_TBL1)
+			reg |= BIT(1);
+		/* enable VMM */
+		if (val & EN_VMM)
+			reg |= BIT(2);
+	}
+
 	if (reg) {
 		struct sdio_cmd52 cmd;
 
 		cmd.read_write = 1;
 		cmd.function = 0;
 		cmd.raw = 0;
-		cmd.address = WILC_SDIO_IRQ_CLEAR_FLAG_REG;
+		cmd.address = is_wilc1000(wilc->chipid) ?
+			      WILC1000_SDIO_IRQ_CLEAR_FLAG_REG :
+			      WILC3000_SDIO_VMM_TBL_CTRL_REG;
 		cmd.data = reg;
 
 		ret = wilc_sdio_cmd52(wilc, &cmd);
diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wireless/microchip/wilc1000/spi.c
index 5ff940c53ad9c..8913703e10e26 100644
--- a/drivers/net/wireless/microchip/wilc1000/spi.c
+++ b/drivers/net/wireless/microchip/wilc1000/spi.c
@@ -1232,7 +1232,7 @@ static int wilc_validate_chipid(struct wilc *wilc)
 		dev_err(&spi->dev, "Fail cmd read chip id...\n");
 		return ret;
 	}
-	if (!is_wilc1000(chipid)) {
+	if (!is_wilc1000(chipid) && !is_wilc3000(chipid)) {
 		dev_err(&spi->dev, "Unknown chip id 0x%x\n", chipid);
 		return -ENODEV;
 	}
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index 01476f8ecc36f..721fc9c02de5c 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -541,7 +541,7 @@ static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
 	return rqe;
 }
 
-static int chip_allow_sleep(struct wilc *wilc)
+static int chip_allow_sleep_wilc1000(struct wilc *wilc)
 {
 	u32 reg = 0;
 	const struct wilc_hif_func *hif_func = wilc->hif_func;
@@ -601,7 +601,41 @@ static int chip_allow_sleep(struct wilc *wilc)
 	return 0;
 }
 
-static int chip_wakeup(struct wilc *wilc)
+static int chip_allow_sleep_wilc3000(struct wilc *wilc)
+{
+	u32 reg = 0;
+	int ret;
+	const struct wilc_hif_func *hif_func = wilc->hif_func;
+
+	if (wilc->io_type == WILC_HIF_SDIO) {
+		ret = hif_func->hif_read_reg(wilc, WILC_SDIO_WAKEUP_REG, &reg);
+		if (ret)
+			return ret;
+		ret = hif_func->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
+					      reg & ~WILC_SDIO_WAKEUP_BIT);
+		if (ret)
+			return ret;
+	} else {
+		ret = hif_func->hif_read_reg(wilc, WILC_SPI_WAKEUP_REG, &reg);
+		if (ret)
+			return ret;
+		ret = hif_func->hif_write_reg(wilc, WILC_SPI_WAKEUP_REG,
+					      reg & ~WILC_SPI_WAKEUP_BIT);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+static int chip_allow_sleep(struct wilc *wilc)
+{
+	if (is_wilc1000(wilc->chipid))
+		return chip_allow_sleep_wilc1000(wilc);
+	else
+		return chip_allow_sleep_wilc3000(wilc);
+}
+
+static int chip_wakeup_wilc1000(struct wilc *wilc)
 {
 	u32 ret = 0;
 	u32 clk_status_val = 0, trials = 0;
@@ -613,15 +647,15 @@ static int chip_wakeup(struct wilc *wilc)
 	if (wilc->io_type == WILC_HIF_SDIO) {
 		wakeup_reg = WILC_SDIO_WAKEUP_REG;
 		wakeup_bit = WILC_SDIO_WAKEUP_BIT;
-		clk_status_reg = WILC_SDIO_CLK_STATUS_REG;
-		clk_status_bit = WILC_SDIO_CLK_STATUS_BIT;
+		clk_status_reg = WILC1000_SDIO_CLK_STATUS_REG;
+		clk_status_bit = WILC1000_SDIO_CLK_STATUS_BIT;
 		from_host_to_fw_reg = WILC_SDIO_HOST_TO_FW_REG;
 		from_host_to_fw_bit = WILC_SDIO_HOST_TO_FW_BIT;
 	} else {
 		wakeup_reg = WILC_SPI_WAKEUP_REG;
 		wakeup_bit = WILC_SPI_WAKEUP_BIT;
-		clk_status_reg = WILC_SPI_CLK_STATUS_REG;
-		clk_status_bit = WILC_SPI_CLK_STATUS_BIT;
+		clk_status_reg = WILC1000_SPI_CLK_STATUS_REG;
+		clk_status_bit = WILC1000_SPI_CLK_STATUS_BIT;
 		from_host_to_fw_reg = WILC_SPI_HOST_TO_FW_REG;
 		from_host_to_fw_bit = WILC_SPI_HOST_TO_FW_BIT;
 	}
@@ -663,6 +697,74 @@ static int chip_wakeup(struct wilc *wilc)
 	return 0;
 }
 
+static int chip_wakeup_wilc3000(struct wilc *wilc)
+{
+	u32 wakeup_reg_val, clk_status_reg_val, trials = 0;
+	u32 wakeup_reg, wakeup_bit;
+	u32 clk_status_reg, clk_status_bit;
+	int wake_seq_trials = 5;
+	const struct wilc_hif_func *hif_func = wilc->hif_func;
+
+	if (wilc->io_type == WILC_HIF_SDIO) {
+		wakeup_reg = WILC_SDIO_WAKEUP_REG;
+		wakeup_bit = WILC_SDIO_WAKEUP_BIT;
+		clk_status_reg = WILC3000_SDIO_CLK_STATUS_REG;
+		clk_status_bit = WILC3000_SDIO_CLK_STATUS_BIT;
+	} else {
+		wakeup_reg = WILC_SPI_WAKEUP_REG;
+		wakeup_bit = WILC_SPI_WAKEUP_BIT;
+		clk_status_reg = WILC3000_SPI_CLK_STATUS_REG;
+		clk_status_bit = WILC3000_SPI_CLK_STATUS_BIT;
+	}
+
+	hif_func->hif_read_reg(wilc, wakeup_reg, &wakeup_reg_val);
+	do {
+		hif_func->hif_write_reg(wilc, wakeup_reg, wakeup_reg_val |
+							  wakeup_bit);
+		/* Check the clock status */
+		hif_func->hif_read_reg(wilc, clk_status_reg,
+				       &clk_status_reg_val);
+
+		/* In case of clocks off, wait 1ms, and check it again.
+		 * if still off, wait for another 1ms, for a total wait of 3ms.
+		 * If still off, redo the wake up sequence
+		 */
+		while ((clk_status_reg_val & clk_status_bit) == 0 &&
+		       (++trials % 4) != 0) {
+			/* Wait for the chip to stabilize*/
+			usleep_range(1000, 1100);
+
+			/* Make sure chip is awake. This is an extra step that
+			 * can be removed later to avoid the bus access
+			 * overhead
+			 */
+			hif_func->hif_read_reg(wilc, clk_status_reg,
+					       &clk_status_reg_val);
+		}
+		/* in case of failure, Reset the wakeup bit to introduce a new
+		 * edge on the next loop
+		 */
+		if ((clk_status_reg_val & clk_status_bit) == 0) {
+			hif_func->hif_write_reg(wilc, wakeup_reg,
+						wakeup_reg_val & (~wakeup_bit));
+			/* added wait before wakeup sequence retry */
+			usleep_range(200, 300);
+		}
+	} while ((clk_status_reg_val & clk_status_bit) == 0 && wake_seq_trials-- > 0);
+	if (!wake_seq_trials)
+		dev_err(wilc->dev, "clocks still OFF. Wake up failed\n");
+
+	return 0;
+}
+
+static int chip_wakeup(struct wilc *wilc)
+{
+	if (is_wilc1000(wilc->chipid))
+		return chip_wakeup_wilc1000(wilc);
+	else
+		return chip_wakeup_wilc3000(wilc);
+}
+
 static inline int acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
 {
 	int ret = 0;
@@ -695,7 +797,9 @@ int host_wakeup_notify(struct wilc *wilc)
 	if (ret)
 		return ret;
 
-	wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1);
+	wilc->hif_func->hif_write_reg(wilc, is_wilc1000(wilc->chipid) ?
+					    WILC1000_CORTUS_INTERRUPT_2 :
+					    WILC3000_CORTUS_INTERRUPT_2, 1);
 	return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 }
 EXPORT_SYMBOL_GPL(host_wakeup_notify);
@@ -707,7 +811,9 @@ int host_sleep_notify(struct wilc *wilc)
 	if (ret)
 		return ret;
 
-	wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1);
+	wilc->hif_func->hif_write_reg(wilc, is_wilc1000(wilc->chipid) ?
+					    WILC1000_CORTUS_INTERRUPT_1 :
+					    WILC3000_CORTUS_INTERRUPT_1, 1);
 	return release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 }
 EXPORT_SYMBOL_GPL(host_sleep_notify);
@@ -842,19 +948,45 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 		if (ret)
 			break;
 
-		ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
-		if (ret)
-			break;
+		if (is_wilc1000(wilc->chipid)) {
+			ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
+			if (ret)
+				break;
 
-		do {
-			ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
+			do {
+				ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
+				if (ret)
+					break;
+				if (FIELD_GET(WILC_VMM_ENTRY_AVAILABLE, reg)) {
+					entries = FIELD_GET(WILC_VMM_ENTRY_COUNT, reg);
+					break;
+				}
+			} while (--timeout);
+		} else {
+			ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0);
 			if (ret)
 				break;
-			if (FIELD_GET(WILC_VMM_ENTRY_AVAILABLE, reg)) {
-				entries = FIELD_GET(WILC_VMM_ENTRY_COUNT, reg);
+
+			/* interrupt firmware */
+			ret = func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_BASE, 1);
+			if (ret)
 				break;
-			}
-		} while (--timeout);
+
+			do {
+				ret = func->hif_read_reg(wilc, WILC_CORTUS_INTERRUPT_BASE, &reg);
+				if (ret)
+					break;
+				if (reg == 0) {
+					/* Get the entries */
+					ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
+					if (ret)
+						break;
+
+					entries = FIELD_GET(WILC_VMM_ENTRY_COUNT, reg);
+					break;
+				}
+			} while (--timeout);
+		}
 		if (timeout <= 0) {
 			ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
 			break;
@@ -1212,6 +1344,9 @@ int wilc_wlan_start(struct wilc *wilc)
 	if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
 		reg |= WILC_HAVE_SDIO_IRQ_GPIO;
 
+	if (is_wilc3000(wilc->chipid))
+		reg |= WILC_HAVE_SLEEP_CLK_SRC_RTC;
+
 	ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
 	if (ret)
 		goto release;
@@ -1462,21 +1597,25 @@ static int wilc_get_chipid(struct wilc *wilc)
 	u32 rfrevid = 0;
 
 	if (wilc->chipid == 0) {
-		wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
-		wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
-					     &rfrevid);
-		if (!is_wilc1000(chipid)) {
-			wilc->chipid = 0;
-			return -EINVAL;
-		}
-		if (chipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
-			if (rfrevid != 0x1)
-				chipid = WILC_1000_BASE_ID_2A_REV1;
-		} else if (chipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
-			if (rfrevid == 0x4)
-				chipid = WILC_1000_BASE_ID_2B_REV1;
-			else if (rfrevid != 0x3)
-				chipid = WILC_1000_BASE_ID_2B_REV2;
+		wilc->hif_func->hif_read_reg(wilc, WILC3000_CHIP_ID, &chipid);
+		if (!is_wilc3000(chipid)) {
+			wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
+			wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
+						     &rfrevid);
+
+			if (!is_wilc1000(chipid)) {
+				wilc->chipid = 0;
+				return -EINVAL;
+			}
+			if (chipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
+				if (rfrevid != 0x1)
+					chipid = WILC_1000_BASE_ID_2A_REV1;
+			} else if (chipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
+				if (rfrevid == 0x4)
+					chipid = WILC_1000_BASE_ID_2B_REV1;
+				else if (rfrevid != 0x3)
+					chipid = WILC_1000_BASE_ID_2B_REV2;
+			}
 		}
 
 		wilc->chipid = chipid;
@@ -1525,6 +1664,21 @@ static int init_chip(struct net_device *dev)
 		}
 	}
 
+	if (is_wilc3000(wilc->chipid)) {
+		ret = wilc->hif_func->hif_read_reg(wilc, WILC3000_BOOTROM_STATUS, &reg);
+		if (ret) {
+			netdev_err(dev, "failed to read WILC3000 BootROM status register\n");
+			goto release;
+		}
+
+		ret = wilc->hif_func->hif_write_reg(wilc, WILC3000_CORTUS_BOOT_REGISTER_2,
+						    WILC_CORTUS_BOOT_FROM_IRAM);
+		if (ret) {
+			netdev_err(dev, "failed to write WILC3000 Boot register\n");
+			goto release;
+		}
+	}
+
 release:
 	rv = release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 
@@ -1606,7 +1760,7 @@ int wilc_wlan_init(struct net_device *dev)
 		if (ret)
 			goto fail;
 
-		if (!is_wilc1000(wilc->chipid)) {
+		if (!is_wilc1000(wilc->chipid) && !is_wilc3000(wilc->chipid)) {
 			netdev_err(dev, "Unsupported chipid: %x\n", wilc->chipid);
 			ret = -EINVAL;
 			goto fail;
diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.h b/drivers/net/wireless/microchip/wilc1000/wlan.h
index 4e2b0c4ac1e21..8fcae9d14550c 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.h
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.h
@@ -96,8 +96,14 @@
 #define WILC_SPI_WAKEUP_REG		0x1
 #define WILC_SPI_WAKEUP_BIT		BIT(1)
 
-#define WILC_SPI_CLK_STATUS_REG        0x0f
-#define WILC_SPI_CLK_STATUS_BIT        BIT(2)
+/* WILC1000 specific */
+#define WILC1000_SPI_CLK_STATUS_REG	0x0f
+#define WILC1000_SPI_CLK_STATUS_BIT	BIT(2)
+
+/* WILC3000 specific */
+#define WILC3000_SPI_CLK_STATUS_REG	0x13
+#define WILC3000_SPI_CLK_STATUS_BIT	BIT(2)
+
 #define WILC_SPI_HOST_TO_FW_REG		0x0b
 #define WILC_SPI_HOST_TO_FW_BIT		BIT(0)
 
@@ -123,14 +129,24 @@
 #define WILC_SDIO_WAKEUP_REG		0xf0
 #define WILC_SDIO_WAKEUP_BIT		BIT(0)
 
-#define WILC_SDIO_CLK_STATUS_REG	0xf1
-#define WILC_SDIO_CLK_STATUS_BIT	BIT(0)
+/* WILC1000 */
+#define WILC1000_SDIO_CLK_STATUS_REG	0xf1
+#define WILC1000_SDIO_CLK_STATUS_BIT	BIT(0)
+
+#define WILC1000_SDIO_IRQ_FLAG_REG	0xf7
+#define WILC1000_SDIO_IRQ_CLEAR_FLAG_REG	0xf8
+
+/* WILC3000 specific */
+#define WILC3000_SDIO_CLK_STATUS_REG	0xf0 /* clk & wakeup are on same reg */
+#define WILC3000_SDIO_CLK_STATUS_BIT	BIT(4)
+
+#define WILC3000_SDIO_VMM_TBL_CTRL_REG	0xf1
+#define WILC3000_SDIO_IRQ_FLAG_REG	0xfe
 
+/* Common vendor specific CCCR register */
 #define WILC_SDIO_INTERRUPT_DATA_SZ_REG	0xf2 /* Read size (2 bytes) */
 
 #define WILC_SDIO_VMM_TBL_CTRL_REG	0xf6
-#define WILC_SDIO_IRQ_FLAG_REG		0xf7
-#define WILC_SDIO_IRQ_CLEAR_FLAG_REG	0xf8
 
 #define WILC_SDIO_HOST_TO_FW_REG	0xfa
 #define WILC_SDIO_HOST_TO_FW_BIT	BIT(0)
@@ -172,8 +188,11 @@
 #define WILC_HAVE_USE_IRQ_AS_HOST_WAKE	BIT(8)
 
 #define WILC_CORTUS_INTERRUPT_BASE	0x10A8
-#define WILC_CORTUS_INTERRUPT_1		(WILC_CORTUS_INTERRUPT_BASE + 0x4)
-#define WILC_CORTUS_INTERRUPT_2		(WILC_CORTUS_INTERRUPT_BASE + 0x8)
+#define WILC1000_CORTUS_INTERRUPT_1	(WILC_CORTUS_INTERRUPT_BASE + 0x4)
+#define WILC3000_CORTUS_INTERRUPT_1	(WILC_CORTUS_INTERRUPT_BASE + 0x14)
+
+#define WILC1000_CORTUS_INTERRUPT_2	(WILC_CORTUS_INTERRUPT_BASE + 0x8)
+#define WILC3000_CORTUS_INTERRUPT_2	(WILC_CORTUS_INTERRUPT_BASE + 0x18)
 
 /* tx control register 1 to 4 for RX */
 #define WILC_REG_4_TO_1_RX		0x1e1c
@@ -183,6 +202,9 @@
 
 #define WILC_CORTUS_RESET_MUX_SEL	0x1118
 #define WILC_CORTUS_BOOT_REGISTER	0xc0000
+#define WILC3000_BOOTROM_STATUS		0x207ac
+#define WILC3000_CORTUS_BOOT_REGISTER_2	0x4f0000
+#define WILC3000_CHIP_ID		0x3b0000
 
 #define WILC_CORTUS_BOOT_FROM_IRAM	0x71
 
@@ -195,6 +217,8 @@
 #define WILC_1000_BASE_ID_2B_REV1	(WILC_1000_BASE_ID_2B + 1)
 #define WILC_1000_BASE_ID_2B_REV2	(WILC_1000_BASE_ID_2B + 2)
 
+#define WILC_3000_BASE_ID		0x300000
+
 #define WILC_CHIP_REV_FIELD		GENMASK(11, 0)
 
 /********************************************
@@ -413,6 +437,11 @@ static inline bool is_wilc1000(u32 id)
 	return (id & (~WILC_CHIP_REV_FIELD)) == WILC_1000_BASE_ID;
 }
 
+static inline bool is_wilc3000(u32 id)
+{
+	return (id & (~WILC_CHIP_REV_FIELD)) == WILC_3000_BASE_ID;
+}
+
 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 				u32 buffer_size);
 int wilc_wlan_start(struct wilc *wilc);
-- 
2.45.2

Re: [PATCH v3 1/5] dt-bindings: wireless: wilc1000: Document WILC3000 compatible string

[Krzysztof Kozlowski]

On 27/08/2024 18:37, Marek Vasut wrote:
> Document compatible string for the WILC3000 chip. The chip is similar
> to WILC1000, except that the register layout is slightly different and
> it does not support WPA3/SAE.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof

Re: [PATCH v3 2/5] wifi: wilc1000: Fold wilc_get_chipid() into wlan.c

[Alexis Lothoré]

On 8/27/24 18:37, Marek Vasut wrote:
> Do not use wilc_get_chipid() outside of wlan.c . Instead, call
> wilc_get_chipid() right after the SDIO/SPI interface has been
> initialized to cache the device chipid, and then use the cached
> chipid throughout the driver. Make wilc_get_chipid() static and
> remove its prototype from wlan.h . Make wilc_get_chipid() return
> a proper return value instead of a chipid.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
> Cc: Ajay Singh <ajay.kathat@microchip.com>
> Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
> Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Marek Vasut <marex@denx.de>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: linux-wireless@vger.kernel.org
> Cc: netdev@vger.kernel.org

nit: The remaining wilc_getchipid() call in netdev.c should have been removed in
this very same commit (it is removed in a later patch in this series, but it
makes this commit depend on the last one).

Reviewed-by: Alexis Lothoré <alexis.lothore@bootlin.com>

-- 
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH v3 4/5] wifi: wilc1000: Fill in missing error handling

[Alexis Lothoré]

On 8/27/24 18:37, Marek Vasut wrote:
> Add error handling to chip_wakeup() and propagate the errors throughout
> the entire driver. Add error handling to acquire_bus()/release_bus() and
> host_sleep_notify()/host_wakeup_notify() functions as a result as well.
> Fill the error handling to all call sites.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> ---
> Cc: "David S. Miller" <davem@davemloft.net>
> Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
> Cc: Ajay Singh <ajay.kathat@microchip.com>
> Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
> Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: Eric Dumazet <edumazet@google.com>
> Cc: Jakub Kicinski <kuba@kernel.org>
> Cc: Kalle Valo <kvalo@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Marek Vasut <marex@denx.de>
> Cc: Paolo Abeni <pabeni@redhat.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: linux-wireless@vger.kernel.org
> Cc: netdev@vger.kernel.org

Reviewed-by: Alexis Lothoré <alexis.lothore@bootlin.com>

-- 
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH v3 3/5] wifi: wilc1000: Fold chip_allow_sleep()/chip_wakeup() into wlan.c

[Alexis Lothoré]

On 8/27/24 18:37, Marek Vasut wrote:
> Neither chip_allow_sleep()/chip_wakeup() is used outside of wlan.c .
> Make both functions static and remove both the exported symbol and
> entries from wlan.h .
> 
> Make chip_allow_sleep() return error code in preparation for the
> follow up patches.
> 
> Move acquire_bus() and release_bus() to avoid forward declaration
> of chip_allow_sleep()/chip_wakeup().
> 
> Signed-off-by: Marek Vasut <marex@denx.de>

Reviewed-by: Alexis Lothoré <alexis.lothore@bootlin.com>

-- 
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH v3 2/5] wifi: wilc1000: Fold wilc_get_chipid() into wlan.c

[Marek Vasut]

On 8/28/24 10:39 AM, Alexis Lothoré wrote:
> On 8/27/24 18:37, Marek Vasut wrote:
>> Do not use wilc_get_chipid() outside of wlan.c . Instead, call
>> wilc_get_chipid() right after the SDIO/SPI interface has been
>> initialized to cache the device chipid, and then use the cached
>> chipid throughout the driver. Make wilc_get_chipid() static and
>> remove its prototype from wlan.h . Make wilc_get_chipid() return
>> a proper return value instead of a chipid.
>>
>> Signed-off-by: Marek Vasut <marex@denx.de>
>> ---
>> Cc: "David S. Miller" <davem@davemloft.net>
>> Cc: Adham Abozaeid <adham.abozaeid@microchip.com>
>> Cc: Ajay Singh <ajay.kathat@microchip.com>
>> Cc: Alexis Lothoré <alexis.lothore@bootlin.com>
>> Cc: Claudiu Beznea <claudiu.beznea@tuxon.dev>
>> Cc: Conor Dooley <conor+dt@kernel.org>
>> Cc: Eric Dumazet <edumazet@google.com>
>> Cc: Jakub Kicinski <kuba@kernel.org>
>> Cc: Kalle Valo <kvalo@kernel.org>
>> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
>> Cc: Marek Vasut <marex@denx.de>
>> Cc: Paolo Abeni <pabeni@redhat.com>
>> Cc: Rob Herring <robh@kernel.org>
>> Cc: devicetree@vger.kernel.org
>> Cc: linux-wireless@vger.kernel.org
>> Cc: netdev@vger.kernel.org
> 
> nit: The remaining wilc_getchipid() call in netdev.c should have been removed in
> this very same commit (it is removed in a later patch in this series, but it
> makes this commit depend on the last one).
> 
> Reviewed-by: Alexis Lothoré <alexis.lothore@bootlin.com>

Fixed in V4, thanks.