diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.14/421-rtc-initialize.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.14/421-rtc-initialize.patch | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/target/linux/mvebu/patches-4.14/421-rtc-initialize.patch b/target/linux/mvebu/patches-4.14/421-rtc-initialize.patch deleted file mode 100644 index 47a5acc70d..0000000000 --- a/target/linux/mvebu/patches-4.14/421-rtc-initialize.patch +++ /dev/null @@ -1,74 +0,0 @@ -Some boards like the Turris Omnia have an RTC chip that does not get -initialized. Initializing the RTC at the driver level helps get rid of -bootloader hacks that write special register values. - ---- a/drivers/rtc/rtc-armada38x.c -+++ b/drivers/rtc/rtc-armada38x.c -@@ -30,6 +30,9 @@ - #define RTC_IRQ_FREQ_1HZ BIT(2) - #define RTC_CCR 0x18 - #define RTC_CCR_MODE BIT(15) -+#define RTC_CCR_NORMAL_PPB 0x2000 -+#define RTC_TEST_CONF 0x1c -+#define RTC_TEST_CONF_MASK 0xff - - #define RTC_TIME 0xC - #define RTC_ALARM1 0x10 -@@ -91,6 +94,7 @@ struct armada38x_rtc_data { - void (*clear_isr)(struct armada38x_rtc *rtc); - void (*unmask_interrupt)(struct armada38x_rtc *rtc); - u32 alarm; -+ void (*init_rtc)(struct armada38x_rtc *rtc); - }; - - /* -@@ -202,6 +206,23 @@ static void armada38x_unmask_interrupt(s - writel(val | SOC_RTC_ALARM1_MASK, rtc->regs_soc + SOC_RTC_INTERRUPT); - } - -+static void armada38x_rtc_init(struct armada38x_rtc *rtc) -+{ -+ u32 reg; -+ -+ /* Test RTC test configuration register bits [7:0] */ -+ reg = readl(rtc->regs + RTC_TEST_CONF); -+ /* If bits [7:0] are non-zero, assume RTC was uninitialized */ -+ if (reg & RTC_TEST_CONF_MASK) { -+ rtc_delayed_write(0, rtc, RTC_TEST_CONF); -+ rtc_delayed_write(0, rtc, RTC_TIME); -+ rtc_delayed_write((RTC_STATUS_ALARM1 | RTC_STATUS_ALARM2), -+ rtc, RTC_STATUS); -+ rtc_delayed_write(RTC_CCR_NORMAL_PPB, rtc, RTC_CCR); -+ } -+ return; -+} -+ - static void armada8k_clear_isr(struct armada38x_rtc *rtc) - { - writel(RTC_8K_ALARM2, rtc->regs_soc + RTC_8K_ISR); -@@ -464,6 +485,7 @@ static const struct armada38x_rtc_data a - .clear_isr = armada38x_clear_isr, - .unmask_interrupt = armada38x_unmask_interrupt, - .alarm = ALARM1, -+ .init_rtc = armada38x_rtc_init, - }; - - static const struct armada38x_rtc_data armada8k_data = { -@@ -558,6 +580,17 @@ static __init int armada38x_rtc_probe(st - dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret); - return ret; - } -+ -+ /* -+ * Try to detect if RTC is in uninitialized state. -+ * It is not definitive to know if the RTC is in an uninialized state or not, -+ * but the following call will read some bits in the RTC unit and guess if -+ * if it's in that state, and accordingly set it to sane default values. -+ */ -+ if (rtc->data->init_rtc) { -+ rtc->data->init_rtc(rtc); -+ } -+ - return 0; - } - |