[U-Boot] [PATCH] x86: Fix RTC build error on ivybridge

[Bin Meng <bmeng.cn@gmail.com>]

For some unknown reason, buildman does not report build error
when building commit 06c4b7e. This commit is to correct the
build error and needs to be squashed into commit 06c4b7e.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

 arch/x86/cpu/ivybridge/lpc.c   |  1 -
 arch/x86/cpu/ivybridge/sdram.c | 32 ++++++++++++++++++++++++--------
 arch/x86/dts/rtc.dtsi          |  1 +
 3 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/arch/x86/cpu/ivybridge/lpc.c b/arch/x86/cpu/ivybridge/lpc.c
index bc1a0f0..3efd3e8 100644
--- a/arch/x86/cpu/ivybridge/lpc.c
+++ b/arch/x86/cpu/ivybridge/lpc.c
@@ -252,7 +252,6 @@ static void pch_rtc_init(pci_dev_t dev)
 	/* TODO: Handle power failure */
 	if (rtc_failed)
 		printf("RTC power failed\n");
-	rtc_init();
 }
 
 /* CougarPoint PCH Power Management init */
diff --git a/arch/x86/cpu/ivybridge/sdram.c b/arch/x86/cpu/ivybridge/sdram.c
index af907c5..7f3b13d 100644
--- a/arch/x86/cpu/ivybridge/sdram.c
+++ b/arch/x86/cpu/ivybridge/sdram.c
@@ -128,6 +128,14 @@ static int get_mrc_entry(struct udevice **devp, struct fmap_entry *entry)
 static int read_seed_from_cmos(struct pei_data *pei_data)
 {
 	u16 c1, c2, checksum, seed_checksum;
+	struct udevice *dev;
+	int rcode = 0;
+
+	rcode = uclass_get_device(UCLASS_RTC, 0, &dev);
+	if (rcode) {
+		debug("Cannot find RTC: err=%d\n", rcode);
+		return -ENODEV;
+	}
 
 	/*
 	 * Read scrambler seeds from CMOS RAM. We don't want to store them in
@@ -135,11 +143,11 @@ static int read_seed_from_cmos(struct pei_data *pei_data)
 	 * the flash too much. So we store these in CMOS and the large MRC
 	 * data in SPI flash.
 	 */
-	pei_data->scrambler_seed = rtc_read32(CMOS_OFFSET_MRC_SEED);
+	rtc_read32(dev, CMOS_OFFSET_MRC_SEED, &pei_data->scrambler_seed);
 	debug("Read scrambler seed    0x%08x from CMOS 0x%02x\n",
 	      pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);
 
-	pei_data->scrambler_seed_s3 = rtc_read32(CMOS_OFFSET_MRC_SEED_S3);
+	rtc_read32(dev, CMOS_OFFSET_MRC_SEED_S3, &pei_data->scrambler_seed_s3);
 	debug("Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n",
 	      pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);
 
@@ -150,8 +158,8 @@ static int read_seed_from_cmos(struct pei_data *pei_data)
 				 sizeof(u32));
 	checksum = add_ip_checksums(sizeof(u32), c1, c2);
 
-	seed_checksum = rtc_read8(CMOS_OFFSET_MRC_SEED_CHK);
-	seed_checksum |= rtc_read8(CMOS_OFFSET_MRC_SEED_CHK + 1) << 8;
+	seed_checksum = rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK);
+	seed_checksum |= rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1) << 8;
 
 	if (checksum != seed_checksum) {
 		debug("%s: invalid seed checksum\n", __func__);
@@ -223,13 +231,21 @@ static int build_mrc_data(struct mrc_data_container **datap)
 static int write_seeds_to_cmos(struct pei_data *pei_data)
 {
 	u16 c1, c2, checksum;
+	struct udevice *dev;
+	int rcode = 0;
+
+	rcode = uclass_get_device(UCLASS_RTC, 0, &dev);
+	if (rcode) {
+		debug("Cannot find RTC: err=%d\n", rcode);
+		return -ENODEV;
+	}
 
 	/* Save the MRC seed values to CMOS */
-	rtc_write32(CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed);
+	rtc_write32(dev, CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed);
 	debug("Save scrambler seed    0x%08x to CMOS 0x%02x\n",
 	      pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);
 
-	rtc_write32(CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3);
+	rtc_write32(dev, CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3);
 	debug("Save s3 scrambler seed 0x%08x to CMOS 0x%02x\n",
 	      pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);
 
@@ -240,8 +256,8 @@ static int write_seeds_to_cmos(struct pei_data *pei_data)
 				 sizeof(u32));
 	checksum = add_ip_checksums(sizeof(u32), c1, c2);
 
-	rtc_write8(CMOS_OFFSET_MRC_SEED_CHK, checksum & 0xff);
-	rtc_write8(CMOS_OFFSET_MRC_SEED_CHK + 1, (checksum >> 8) & 0xff);
+	rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK, checksum & 0xff);
+	rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1, (checksum >> 8) & 0xff);
 
 	return 0;
 }
diff --git a/arch/x86/dts/rtc.dtsi b/arch/x86/dts/rtc.dtsi
index 93dacd7..1797e04 100644
--- a/arch/x86/dts/rtc.dtsi
+++ b/arch/x86/dts/rtc.dtsi
@@ -1,6 +1,7 @@
 / {
 	rtc {
 		compatible = "motorola,mc146818";
+		u-boot,dm-pre-reloc;
 		reg = <0x70 2>;
 	};
 };
-- 
1.8.2.1