From a2cb55938fd9bd00dddcd0991d67fd1dd9e05ad5 Mon Sep 17 00:00:00 2001
From: Konstantin Porotchkin <kostap@marvell.com>
Date: Wed, 5 Apr 2017 18:22:31 +0300
Subject: [PATCH] arm64: mvebu: a8k: Add support for NAND clock get
Implement mvebu_get_nand_clock call for A8K family.
This function is used by PXA3XX NAND driver.
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Igal Liberman <igall@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Reviewed-by: Stefan Roese <sr@denx.de>
---
arch/arm/mach-mvebu/armada8k/cpu.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/arm/mach-mvebu/armada8k/cpu.c b/arch/arm/mach-mvebu/armada8k/cpu.c
index 2325e9a180..38e7d33cb3 100644
--- a/arch/arm/mach-mvebu/armada8k/cpu.c
+++ b/arch/arm/mach-mvebu/armada8k/cpu.c
@@ -110,3 +110,21 @@ void reset_cpu(ulong ignored)
reg &= ~(1 << RFU_SW_RESET_OFFSET);
writel(reg, RFU_GLOBAL_SW_RST);
}
+
+/*
+ * TODO - implement this functionality using platform
+ * clock driver once it gets available
+ * Return NAND clock in Hz
+ */
+u32 mvebu_get_nand_clock(void)
+{
+ unsigned long NAND_FLASH_CLK_CTRL = 0xF2440700UL;
+ unsigned long NF_CLOCK_SEL_MASK = 0x1;
+ u32 reg;
+
+ reg = readl(NAND_FLASH_CLK_CTRL);
+ if (reg & NF_CLOCK_SEL_MASK)
+ return 400 * 1000000;
+ else
+ return 250 * 1000000;
+}
--
2.39.5