+++ /dev/null
-From aff616f4a33bd3a9ab1506fdbe97fcfe285cb7b0 Mon Sep 17 00:00:00 2001
-From: Paul Cercueil <paul@crapouillou.net>
-Date: Thu, 13 Sep 2012 00:09:20 +0200
-Subject: [PATCH 07/16] RTC: JZ4740: Init the "regulator" register on startup.
-
-This register controls the accuracy of the RTC. uC/OS-II use
-the RTC as a 100Hz clock, and writes a completely wrong value
-on that register, that we have to overwrite if we want a working
-real-time clock.
-
-Signed-off-by: Paul Cercueil <paul@crapouillou.net>
-Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
----
- drivers/rtc/rtc-jz4740.c | 17 +++++++++++++++++
- 1 file changed, 17 insertions(+)
-
---- a/drivers/rtc/rtc-jz4740.c
-+++ b/drivers/rtc/rtc-jz4740.c
-@@ -14,6 +14,7 @@
- *
- */
-
-+#include <linux/clk.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
-@@ -215,6 +216,7 @@ static int jz4740_rtc_probe(struct platf
- int ret;
- struct jz4740_rtc *rtc;
- uint32_t scratchpad;
-+ struct clk *rtc_clk;
-
- rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
- if (!rtc)
-@@ -280,6 +282,21 @@ static int jz4740_rtc_probe(struct platf
- }
- }
-
-+ rtc_clk = clk_get(&pdev->dev, "rtc");
-+ if (IS_ERR(rtc_clk)) {
-+ dev_err(&pdev->dev, "Failed to get RTC clock\n");
-+ goto err_free_irq;
-+ }
-+
-+ /* TODO: initialize the ADJC bits (25:16) to fine-tune
-+ * the accuracy of the RTC */
-+ ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_REGULATOR,
-+ (clk_get_rate(rtc_clk) - 1) & 0xffff);
-+ clk_put(rtc_clk);
-+
-+ if (ret)
-+ dev_warn(&pdev->dev, "Could not update RTC regulator register\n");
-+
- return 0;
-
- err_free_irq: