The watchdog reset sources must be disabled when the system is halted.
Otherwise the watchdogs will trigger a reset if they have been armed.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxxxxxxxxxxx>
---
drivers/clk/renesas/r9a06g032-clocks.c | 30 ++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c
index c99942f0e4d4..d96211927a1d 100644
--- a/drivers/clk/renesas/r9a06g032-clocks.c
+++ b/drivers/clk/renesas/r9a06g032-clocks.c
@@ -129,6 +129,11 @@ enum { K_GATE = 0, K_FFC, K_DIV, K_BITSEL, K_DUALGATE };
#define R9A06G032_CLOCK_COUNT (R9A06G032_UART_GROUP_34567 + 1)
+#define R9A06G032_SYSCTRL_REG_RSTEN 0x120
+#define WDA7RST1 BIT(2)
+#define WDA7RST0 BIT(1)
+#define MRESET BIT(0)
+
static const struct r9a06g032_clkdesc r9a06g032_clocks[] = {
D_ROOT(CLKOUT, "clkout", 25, 1),
D_ROOT(CLK_PLL_USB, "clk_pll_usb", 12, 10),
@@ -893,6 +898,19 @@ static void r9a06g032_clocks_del_clk_provider(void *data)
of_clk_del_provider(data);
}
+static void r9a06g032_reset_sources(struct r9a06g032_priv *clocks,
+ uint32_t mask, uint32_t value)
+{
+ uint32_t rsten;
+ unsigned long flags;
+
+ spin_lock_irqsave(&clocks->lock, flags);
+ rsten = readl(clocks->reg);
+ rsten = (rsten & ~mask) | (value & mask);
+ writel(rsten, clocks->reg + R9A06G032_SYSCTRL_REG_RSTEN);
+ spin_unlock_irqrestore(&clocks->lock, flags);
+}
+
static int __init r9a06g032_clocks_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -910,6 +928,8 @@ static int __init r9a06g032_clocks_probe(struct platform_device *pdev)
if (!clocks || !clks)
return -ENOMEM;
+ platform_set_drvdata(pdev, clocks);
+
spin_lock_init(&clocks->lock);
clocks->data.clks = clks;
@@ -963,9 +983,18 @@ static int __init r9a06g032_clocks_probe(struct platform_device *pdev)
if (error)
return error;
+
return r9a06g032_add_clk_domain(dev);
}
+static void r9a06g032_clocks_shutdown(struct platform_device *pdev)
+{
+ struct r9a06g032_priv *clocks = platform_get_drvdata(pdev);
+
+ /* Disable the watchdog reset sources */
+ r9a06g032_reset_sources(clocks, WDA7RST0 | WDA7RST1, 0);
+}
+
static const struct of_device_id r9a06g032_match[] = {
{ .compatible = "renesas,r9a06g032-sysctrl" },
{ }
@@ -976,6 +1005,7 @@ static struct platform_driver r9a06g032_clock_driver = {
.name = "renesas,r9a06g032-sysctrl",
.of_match_table = r9a06g032_match,
},
+ .shutdown = r9a06g032_clocks_shutdown,
};
static int __init r9a06g032_clocks_init(void)
--
2.25.1
