From a2cb55938fd9bd00dddcd0991d67fd1dd9e05ad5 Mon Sep 17 00:00:00 2001 From: Konstantin Porotchkin 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 Cc: Stefan Roese Cc: Igal Liberman Cc: Nadav Haklai Reviewed-by: Stefan Roese --- 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; +} -- 2.30.2