1 files changed, 63 insertions, 29 deletions

diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
index df5960bddfe6..9a051286f120 100644
--- a/drivers/spi/spi-sprd-adi.c
+++ b/drivers/spi/spi-sprd-adi.c
@@ -86,6 +86,7 @@
 #define BIT_WDG_EN			BIT(2)
 
 /* Definition of PMIC reset status register */
+#define HWRST_STATUS_SECURITY		0x02
 #define HWRST_STATUS_RECOVERY		0x20
 #define HWRST_STATUS_NORMAL		0x40
 #define HWRST_STATUS_ALARM		0x50
@@ -97,6 +98,8 @@
 #define HWRST_STATUS_AUTODLOADER	0xa0
 #define HWRST_STATUS_IQMODE		0xb0
 #define HWRST_STATUS_SPRDISK		0xc0
+#define HWRST_STATUS_FACTORYTEST	0xe0
+#define HWRST_STATUS_WATCHDOG		0xf0
 
 /* Use default timeout 50 ms that converts to watchdog values */
 #define WDG_LOAD_VAL			((50 * 1000) / 32768)
@@ -162,14 +165,16 @@ static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
 	int read_timeout = ADI_READ_TIMEOUT;
 	unsigned long flags;
 	u32 val, rd_addr;
-	int ret;
-
-	ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
-					  ADI_HWSPINLOCK_TIMEOUT,
-					  &flags);
-	if (ret) {
-		dev_err(sadi->dev, "get the hw lock failed\n");
-		return ret;
+	int ret = 0;
+
+	if (sadi->hwlock) {
+		ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
+						  ADI_HWSPINLOCK_TIMEOUT,
+						  &flags);
+		if (ret) {
+			dev_err(sadi->dev, "get the hw lock failed\n");
+			return ret;
+		}
 	}
 
 	/*
@@ -216,7 +221,8 @@ static int sprd_adi_read(struct sprd_adi *sadi, u32 reg_paddr, u32 *read_val)
 	*read_val = val & RD_VALUE_MASK;
 
 out:
-	hwspin_unlock_irqrestore(sadi->hwlock, &flags);
+	if (sadi->hwlock)
+		hwspin_unlock_irqrestore(sadi->hwlock, &flags);
 	return ret;
 }
 
@@ -227,12 +233,14 @@ static int sprd_adi_write(struct sprd_adi *sadi, u32 reg_paddr, u32 val)
 	unsigned long flags;
 	int ret;
 
-	ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
-					  ADI_HWSPINLOCK_TIMEOUT,
-					  &flags);
-	if (ret) {
-		dev_err(sadi->dev, "get the hw lock failed\n");
-		return ret;
+	if (sadi->hwlock) {
+		ret = hwspin_lock_timeout_irqsave(sadi->hwlock,
+						  ADI_HWSPINLOCK_TIMEOUT,
+						  &flags);
+		if (ret) {
+			dev_err(sadi->dev, "get the hw lock failed\n");
+			return ret;
+		}
 	}
 
 	ret = sprd_adi_drain_fifo(sadi);
@@ -258,7 +266,8 @@ static int sprd_adi_write(struct sprd_adi *sadi, u32 reg_paddr, u32 val)
 	}
 
 out:
-	hwspin_unlock_irqrestore(sadi->hwlock, &flags);
+	if (sadi->hwlock)
+		hwspin_unlock_irqrestore(sadi->hwlock, &flags);
 	return ret;
 }
 
@@ -307,6 +316,18 @@ static int sprd_adi_transfer_one(struct spi_controller *ctlr,
 	return 0;
 }
 
+static void sprd_adi_set_wdt_rst_mode(struct sprd_adi *sadi)
+{
+#ifdef CONFIG_SPRD_WATCHDOG
+	u32 val;
+
+	/* Set default watchdog reboot mode */
+	sprd_adi_read(sadi, sadi->slave_pbase + PMIC_RST_STATUS, &val);
+	val |= HWRST_STATUS_WATCHDOG;
+	sprd_adi_write(sadi, sadi->slave_pbase + PMIC_RST_STATUS, val);
+#endif
+}
+
 static int sprd_adi_restart_handler(struct notifier_block *this,
 				    unsigned long mode, void *cmd)
 {
@@ -336,11 +357,16 @@ static int sprd_adi_restart_handler(struct notifier_block *this,
 		reboot_mode = HWRST_STATUS_IQMODE;
 	else if (!strncmp(cmd, "sprdisk", 7))
 		reboot_mode = HWRST_STATUS_SPRDISK;
+	else if (!strncmp(cmd, "tospanic", 8))
+		reboot_mode = HWRST_STATUS_SECURITY;
+	else if (!strncmp(cmd, "factorytest", 11))
+		reboot_mode = HWRST_STATUS_FACTORYTEST;
 	else
 		reboot_mode = HWRST_STATUS_NORMAL;
 
 	/* Record the reboot mode */
 	sprd_adi_read(sadi, sadi->slave_pbase + PMIC_RST_STATUS, &val);
+	val &= ~HWRST_STATUS_WATCHDOG;
 	val |= reboot_mode;
 	sprd_adi_write(sadi, sadi->slave_pbase + PMIC_RST_STATUS, val);
 
@@ -380,9 +406,6 @@ static void sprd_adi_hw_init(struct sprd_adi *sadi)
 	const __be32 *list;
 	u32 tmp;
 
-	/* Address bits select default 12 bits */
-	writel_relaxed(0, sadi->base + REG_ADI_CTRL0);
-
 	/* Set all channels as default priority */
 	writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIL);
 	writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIH);
@@ -459,19 +482,30 @@ static int sprd_adi_probe(struct platform_device *pdev)
 	sadi->slave_pbase = res->start + ADI_SLAVE_OFFSET;
 	sadi->ctlr = ctlr;
 	sadi->dev = &pdev->dev;
-	ret = of_hwspin_lock_get_id_byname(np, "adi");
-	if (ret < 0) {
-		dev_err(&pdev->dev, "can not get the hardware spinlock\n");
-		goto put_ctlr;
-	}
-
-	sadi->hwlock = devm_hwspin_lock_request_specific(&pdev->dev, ret);
-	if (!sadi->hwlock) {
-		ret = -ENXIO;
-		goto put_ctlr;
+	ret = of_hwspin_lock_get_id(np, 0);
+	if (ret > 0 || (IS_ENABLED(CONFIG_HWSPINLOCK) && ret == 0)) {
+		sadi->hwlock =
+			devm_hwspin_lock_request_specific(&pdev->dev, ret);
+		if (!sadi->hwlock) {
+			ret = -ENXIO;
+			goto put_ctlr;
+		}
+	} else {
+		switch (ret) {
+		case -ENOENT:
+			dev_info(&pdev->dev, "no hardware spinlock supplied\n");
+			break;
+		default:
+			dev_err(&pdev->dev,
+				"failed to find hwlock id, %d\n", ret);
+			/* fall-through */
+		case -EPROBE_DEFER:
+			goto put_ctlr;
+		}
 	}
 
 	sprd_adi_hw_init(sadi);
+	sprd_adi_set_wdt_rst_mode(sadi);
 
 	ctlr->dev.of_node = pdev->dev.of_node;
 	ctlr->bus_num = pdev->id;