From: Dinh Nguyen <dinguyen@xxxxxxxxxx> Add functionality in the System Manager to set the SDR settings for the SD/MMC IP. Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxx> Cc: Pavel Machek <pavel@xxxxxxx> CC: Arnd Bergmann <arnd@xxxxxxxx> CC: Olof Johansson <olof@xxxxxxxxx> Cc: Rob Herring <rob.herring@xxxxxxxxxxx> Cc: Pawel Moll <pawel.moll@xxxxxxx> Cc: Mark Rutland <mark.rutland@xxxxxxx> Cc: Stephen Warren <swarren@xxxxxxxxxxxxx> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx> Cc: Chris Ball <cjb@xxxxxxxxxx> Cc: Jaehoon Chung <jh80.chung@xxxxxxxxxxx> Cc: Seungwon Jeon <tgih.jun@xxxxxxxxxxx> Cc: devicetree@xxxxxxxxxxxxxxx Cc: linux-mmc@xxxxxxxxxxxxxxx CC: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
