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From: Wenyou Yang <wenyou.yang@microchip.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v4 09/12] board: sama5d2_xplained: Make SPL work on spiflash
Date: Wed, 6 Sep 2017 13:23:40 +0800	[thread overview]
Message-ID: <20170906052343.17989-10-wenyou.yang@microchip.com> (raw)
In-Reply-To: <20170906052343.17989-1-wenyou.yang@microchip.com>

Because before switching to a lower clock source, we must switch
the clock source first instead of last. So before configuring the
PMC_MCKR register, invoke at91_mck_init_down() first.

As said in datasheet, the the size of SPL must not exceed the maximum
size allowed(64Kbytes).

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 board/atmel/sama5d2_xplained/sama5d2_xplained.c | 10 ++++++++++
 include/configs/sama5d2_xplained.h              |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/board/atmel/sama5d2_xplained/sama5d2_xplained.c b/board/atmel/sama5d2_xplained/sama5d2_xplained.c
index 7e0cb4228f..5758653030 100644
--- a/board/atmel/sama5d2_xplained/sama5d2_xplained.c
+++ b/board/atmel/sama5d2_xplained/sama5d2_xplained.c
@@ -247,6 +247,16 @@ void at91_pmc_init(void)
 	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 	u32 tmp;
 
+	/*
+	 * while coming from the ROM code, we run on PLLA @ 492 MHz / 164 MHz
+	 * so we need to slow down and configure MCKR accordingly.
+	 * This is why we have a special flavor of the switching function.
+	 */
+	tmp = AT91_PMC_MCKR_PLLADIV_2 |
+	      AT91_PMC_MCKR_MDIV_3 |
+	      AT91_PMC_MCKR_CSS_MAIN;
+	at91_mck_init_down(tmp);
+
 	tmp = AT91_PMC_PLLAR_29 |
 	      AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
 	      AT91_PMC_PLLXR_MUL(82) |
diff --git a/include/configs/sama5d2_xplained.h b/include/configs/sama5d2_xplained.h
index 891218d83e..aedd5684c4 100644
--- a/include/configs/sama5d2_xplained.h
+++ b/include/configs/sama5d2_xplained.h
@@ -61,7 +61,7 @@
 /* SPL */
 #define CONFIG_SPL_FRAMEWORK
 #define CONFIG_SPL_TEXT_BASE		0x200000
-#define CONFIG_SPL_MAX_SIZE		0x18000
+#define CONFIG_SPL_MAX_SIZE		0x10000
 #define CONFIG_SPL_BSS_START_ADDR	0x20000000
 #define CONFIG_SPL_BSS_MAX_SIZE		0x80000
 #define CONFIG_SYS_SPL_MALLOC_START	0x20080000
-- 
2.13.0

  parent reply	other threads:[~2017-09-06  5:23 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-06  5:23 [U-Boot] [PATCH v4 00/12] board: atmel: Add new board SAMA5D27-SOM1-EK board Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 01/12] board: atmel: Create board/atmel/common folder Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 02/12] board: sama5d2_xplained: Replace code of setting mac addr Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 03/12] board: sama5d4_xplained: Set mac address from eeprom Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 04/12] lib: at91: Add logo files used via API of DM_VIDEO Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 05/12] atmel: common: Add function to display via DM_VIDEO's API Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 06/12] ARM: at91: spl: Adjust switching to oscillator for SAMA5D2 Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 07/12] ARM: at91: spl: Add mck function to lower rate while switching Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 08/12] ARM: at91: spl: Add boot device for boot from QSPI Wenyou Yang
2017-09-06  5:23 ` Wenyou Yang [this message]
2017-09-06  5:23 ` [U-Boot] [PATCH v4 10/12] ARM: at91: mach: Add missing defines of MPDDRC Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 11/12] ARM: at91: Get the Chip ID of SAMA5D2 SiP Wenyou Yang
2017-09-06  5:23 ` [U-Boot] [PATCH v4 12/12] board: atmel: Add SAMA5D27 SOM1 EK board Wenyou Yang

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