[PATCH 1/3] arm: socfpga: Set the SDMMC clock phase in system manager

[dinguyen at altera.com]

From: Dinh Nguyen <dinguyen at altera.com>

Add functionality in the System Manager to set the SDR settings for the
SD/MMC IP.

Signed-off-by: Dinh Nguyen <dinguyen at altera.com>
Cc: Pavel Machek <pavel at denx.de>
CC: Arnd Bergmann <arnd at arndb.de>
CC: Olof Johansson <olof at lixom.net>
Cc: Rob Herring <rob.herring at calxeda.com>
Cc: Pawel Moll <pawel.moll at arm.com>
Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Stephen Warren <swarren at wwwdotorg.org>
Cc: Ian Campbell <ian.campbell at citrix.com>
Cc: Chris Ball <cjb at laptop.org>
Cc: Jaehoon Chung <jh80.chung at samsung.com>
Cc: Seungwon Jeon <tgih.jun at samsung.com>
Cc: devicetree at vger.kernel.org
Cc: linux-mmc at vger.kernel.org
CC: linux-arm-kernel at lists.infradead.org
---
 arch/arm/mach-socfpga/Makefile     |    2 +-
 arch/arm/mach-socfpga/core.h       |    6 ++++++
 arch/arm/mach-socfpga/system_mgr.c |   32 ++++++++++++++++++++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/mach-socfpga/system_mgr.c

diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
index 6dd7a93..e4ff8b9 100644
--- a/arch/arm/mach-socfpga/Makefile
+++ b/arch/arm/mach-socfpga/Makefile
@@ -2,5 +2,5 @@
 # Makefile for the linux kernel.
 #
 
-obj-y					:= socfpga.o
+obj-y					:= socfpga.o system_mgr.o
 obj-$(CONFIG_SMP)	+= headsmp.o platsmp.o
diff --git a/arch/arm/mach-socfpga/core.h b/arch/arm/mach-socfpga/core.h
index 572b8f7..b05fa6a 100644
--- a/arch/arm/mach-socfpga/core.h
+++ b/arch/arm/mach-socfpga/core.h
@@ -44,4 +44,10 @@ extern unsigned long cpu1start_addr;
 
 #define SOCFPGA_SCU_VIRT_BASE   0xfffec000
 
+/* SDMMC Group for System Manager defines */
+#define SYSMGR_SDMMCGRP_CTRL_OFFSET             0x108
+#define DRV_CLK_PHASE_SHIFT_SEL_MASK    0x7
+#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel)          \
+	((((smplsel) & 0x7) << 3) | (((drvsel) & 0x7) << 0))
+
 #endif
diff --git a/arch/arm/mach-socfpga/system_mgr.c b/arch/arm/mach-socfpga/system_mgr.c
new file mode 100644
index 0000000..c69a854
--- /dev/null
+++ b/arch/arm/mach-socfpga/system_mgr.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright Altera Corporation (C) 2013. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/of_platform.h>
+#include <asm/mach/map.h>
+
+#include "core.h"
+
+void socfpga_sysmgr_set_dwmmc_drvsel_smpsel(void)
+{
+	struct device_node *np;
+	u32 timing[2];
+	u32 hs_timing;
+
+	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-dw-mshc");
+	of_property_read_u32_array(np, "samsung,dw-mshc-sdr-timing", timing, 2);
+	hs_timing = SYSMGR_SDMMC_CTRL_SET(timing[0], timing[1]);
+	writel(hs_timing, sys_manager_base_addr + SYSMGR_SDMMCGRP_CTRL_OFFSET);
+}
+EXPORT_SYMBOL(socfpga_sysmgr_set_dwmmc_drvsel_smpsel);
-- 
1.7.9.5