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[U-Boot,2/2] zynq: Kconfig: Add Kconfig option for any DDR specific initialization

Message ID c3ec5710293d736374ea3f7b2d161750ad3df896.1496146770.git.michal.simek@xilinx.com
State Accepted
Commit d84bd9284ea05412928e5b95d4aaebfce18fef7c
Delegated to: Michal Simek
Headers show

Commit Message

Michal Simek May 30, 2017, 12:19 p.m. UTC 
From: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>

Add Kconfig option for ddr init as this might be required
in cases like ddr less systems where we want to skip ddrc
init and this option is useful for it.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

 arch/arm/mach-zynq/Kconfig | 8 ++++++++
 arch/arm/mach-zynq/ddrc.c  | 4 ++++
 2 files changed, 12 insertions(+)
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Patch

diff --git a/arch/arm/mach-zynq/Kconfig b/arch/arm/mach-zynq/Kconfig
index 2529c9ff449d..c428ce5cc70b 100644
--- a/arch/arm/mach-zynq/Kconfig
+++ b/arch/arm/mach-zynq/Kconfig
@@ -24,6 +24,14 @@  config SPL_SPI_FLASH_SUPPORT
 config SPL_SPI_SUPPORT
 	default y if ZYNQ_QSPI
 
+config ZYNQ_DDRC_INIT
+	bool "Zynq DDRC initialization"
+	default y
+	help
+	  This option used to perform DDR specific initialization
+	  if required. There might be cases like ddr less where we
+	  want to skip ddr init and this option is useful for it.
+
 config SYS_BOARD
 	default "zynq"
 
diff --git a/arch/arm/mach-zynq/ddrc.c b/arch/arm/mach-zynq/ddrc.c
index d74f8dbbc45d..bde52d656203 100644
--- a/arch/arm/mach-zynq/ddrc.c
+++ b/arch/arm/mach-zynq/ddrc.c
@@ -12,6 +12,9 @@ 
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifndef CONFIG_ZYNQ_DDRC_INIT
+void zynq_ddrc_init(void) {}
+#else
 /* Control regsiter bitfield definitions */
 #define ZYNQ_DDRC_CTRLREG_BUSWIDTH_MASK		0xC
 #define ZYNQ_DDRC_CTRLREG_BUSWIDTH_SHIFT	2
@@ -46,3 +49,4 @@  void zynq_ddrc_init(void)
 		puts("ECC disabled ");
 	}
 }
+#endif