diff options
Diffstat (limited to 'recipes-bsp/u-boot/u-boot-v2012.04.01/0025-i.MX6-Add-ANATOP-regulator-init.patch')
| -rw-r--r-- | recipes-bsp/u-boot/u-boot-v2012.04.01/0025-i.MX6-Add-ANATOP-regulator-init.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/recipes-bsp/u-boot/u-boot-v2012.04.01/0025-i.MX6-Add-ANATOP-regulator-init.patch b/recipes-bsp/u-boot/u-boot-v2012.04.01/0025-i.MX6-Add-ANATOP-regulator-init.patch new file mode 100644 index 0000000..65b13bc --- /dev/null +++ b/recipes-bsp/u-boot/u-boot-v2012.04.01/0025-i.MX6-Add-ANATOP-regulator-init.patch @@ -0,0 +1,84 @@ +From 15616b5ca6f7dc2b728930cfc729d787869edc9e Mon Sep 17 00:00:00 2001 +From: Dirk Behme <dirk.behme@de.bosch.com> +Date: Wed, 2 May 2012 02:12:17 +0000 +Subject: [PATCH 25/56] i.MX6: Add ANATOP regulator init + +Init the core regulator voltage to 1.2V. This is required for the correct +functioning of the GPU and when the ARM LDO is set to 1.225V. This is a +workaround to fix some memory clock jitter. + +Note: This should be but can't be done in the DCD. The bootloader + prevents access to the ANATOP registers. + +Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com> +CC: Jason Chen <b02280@freescale.com> +CC: Jason Liu <r64343@freescale.com> +CC: Ranjani Vaidyanathan <ra5478@freescale.com> +CC: Stefano Babic <sbabic@denx.de> +CC: Fabio Estevam <festevam@gmail.com> +--- + arch/arm/cpu/armv7/mx6/soc.c | 30 +++++++++++++++++++++++++++++ + arch/arm/include/asm/arch-mx6/sys_proto.h | 2 ++ + 2 files changed, 32 insertions(+) + +diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c +index 543b2cc..90f2088 100644 +--- a/arch/arm/cpu/armv7/mx6/soc.c ++++ b/arch/arm/cpu/armv7/mx6/soc.c +@@ -77,10 +77,40 @@ void init_aips(void) + writel(0x00000000, &aips2->opacr4); + } + ++/* ++ * Set the VDDSOC ++ * ++ * Mask out the REG_CORE[22:18] bits (REG2_TRIG) and set ++ * them to the specified millivolt level. ++ * Possible values are from 0.725V to 1.450V in steps of ++ * 0.025V (25mV). ++ */ ++void set_vddsoc(u32 mv) ++{ ++ struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; ++ u32 val, reg = readl(&anatop->reg_core); ++ ++ if (mv < 725) ++ val = 0x00; /* Power gated off */ ++ else if (mv > 1450) ++ val = 0x1F; /* Power FET switched full on. No regulation */ ++ else ++ val = (mv - 700) / 25; ++ ++ /* ++ * Mask out the REG_CORE[22:18] bits (REG2_TRIG) ++ * and set them to the calculated value (0.7V + val * 0.25V) ++ */ ++ reg = (reg & ~(0x1F << 18)) | (val << 18); ++ writel(reg, &anatop->reg_core); ++} ++ + int arch_cpu_init(void) + { + init_aips(); + ++ set_vddsoc(1200); /* Set VDDSOC to 1.2V */ ++ + return 0; + } + #endif +diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h +index 69687a8..711b30d 100644 +--- a/arch/arm/include/asm/arch-mx6/sys_proto.h ++++ b/arch/arm/include/asm/arch-mx6/sys_proto.h +@@ -28,6 +28,8 @@ + + u32 get_cpu_rev(void); + ++void set_vddsoc(u32 mv); ++ + /* + * Initializes on-chip ethernet controllers. + * to override, implement board_eth_init() +-- +1.7.10 + |