diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap/dvfs/0001-OMAP3-PM-Adding-T2-enabling-of-smartreflex.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap/dvfs/0001-OMAP3-PM-Adding-T2-enabling-of-smartreflex.patch | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap/dvfs/0001-OMAP3-PM-Adding-T2-enabling-of-smartreflex.patch b/extras/recipes-kernel/linux/linux-omap/dvfs/0001-OMAP3-PM-Adding-T2-enabling-of-smartreflex.patch new file mode 100644 index 00000000..eafc4d30 --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap/dvfs/0001-OMAP3-PM-Adding-T2-enabling-of-smartreflex.patch @@ -0,0 +1,60 @@ +From 8548db6d3cf115b29142f803d701122dc4cbb775 Mon Sep 17 00:00:00 2001 +From: Thara Gopinath <thara@ti.com> +Date: Fri, 31 Dec 2010 13:35:02 +0530 +Subject: [PATCH 01/20] OMAP3: PM: Adding T2 enabling of smartreflex + +The smartreflex bit on twl4030 needs to be enabled by default irrespective +of whether smartreflex module is enabled on the OMAP side or not. +This is because without this bit enabled the voltage scaling through +vp forceupdate does not function properly on OMAP3. + +Signed-off-by: Thara Gopinath <thara@ti.com> +--- + arch/arm/mach-omap2/omap_twl.c | 16 ++++++++++++++++ + 1 files changed, 16 insertions(+), 0 deletions(-) + +diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c +index 15f8c6c..a59f36b 100644 +--- a/arch/arm/mach-omap2/omap_twl.c ++++ b/arch/arm/mach-omap2/omap_twl.c +@@ -58,7 +58,9 @@ + static bool is_offset_valid; + static u8 smps_offset; + ++#define TWL4030_DCDC_GLOBAL_CFG 0x06 + #define REG_SMPS_OFFSET 0xE0 ++#define SMARTREFLEX_ENABLE BIT(3) + + unsigned long twl4030_vsel_to_uv(const u8 vsel) + { +@@ -256,6 +258,7 @@ int __init omap4_twl_init(void) + int __init omap3_twl_init(void) + { + struct voltagedomain *voltdm; ++ u8 temp; + + if (!cpu_is_omap34xx()) + return -ENODEV; +@@ -267,6 +270,19 @@ int __init omap3_twl_init(void) + omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX; + } + ++ /* ++ * The smartreflex bit on twl4030 needs to be enabled by ++ * default irrespective of whether smartreflex module is ++ * enabled on the OMAP side or not. This is because without ++ * this bit enabled the voltage scaling through ++ * vp forceupdate does not function properly on OMAP3. ++ */ ++ twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &temp, ++ TWL4030_DCDC_GLOBAL_CFG); ++ temp |= SMARTREFLEX_ENABLE; ++ twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, temp, ++ TWL4030_DCDC_GLOBAL_CFG); ++ + voltdm = omap_voltage_domain_lookup("mpu"); + omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info); + +-- +1.6.6.1 + |