[PATCHv3 01/11] OMAP3+: PM: VP: use uV for max and min voltage limits

Tero Kristo
2011-10-05T17:17:33Z

From: Nishanth Menon <nm@ti.com>

Every PMIC has it's own eccentricities, For example, one of the
PMIC has MSB set to 1 for a specific function - voltage enable!
using an hardcoded value specific for TWL when copied over to
such an implementation causes the system to crash as the MSB bit
was 0 and the voltage got disabled!.

Instead we use actual values and depend on the convertion routines
to abstract out the eccentricities of each PMIC.

With this, we can now move the voltages to a common location in
voltage.h as they are no longer dependent on PMICs and expect the
PMIC's conversion routines to set a cap if the voltage is out of
reach for the PMIC.

Reported-by: Jon Hunter <jon-hunter@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Vishwanath BS <vishwanath.bs@ti.com>
---
arch/arm/mach-omap2/omap_twl.c | 17 -----------------
arch/arm/mach-omap2/voltage.h | 22 ++++++++++++++++++++--
arch/arm/mach-omap2/vp.c | 4 ++--
3 files changed, 22 insertions(+), 21 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
index f515a1a..df4e7c3 100644
--- a/arch/arm/mach-omap2/omap_twl.c
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -30,16 +30,6 @@
#define OMAP3_VP_VSTEPMAX_VSTEPMAX 0x04
#define OMAP3_VP_VLIMITTO_TIMEOUT_US 200

-#define OMAP3430_VP1_VLIMITTO_VDDMIN 0x14
-#define OMAP3430_VP1_VLIMITTO_VDDMAX 0x42
-#define OMAP3430_VP2_VLIMITTO_VDDMIN 0x18
-#define OMAP3430_VP2_VLIMITTO_VDDMAX 0x2c
-
-#define OMAP3630_VP1_VLIMITTO_VDDMIN 0x18
-#define OMAP3630_VP1_VLIMITTO_VDDMAX 0x3c
-#define OMAP3630_VP2_VLIMITTO_VDDMIN 0x18
-#define OMAP3630_VP2_VLIMITTO_VDDMAX 0x30
-
#define OMAP4_SRI2C_SLAVE_ADDR 0x12
#define OMAP4_VDD_MPU_SR_VOLT_REG 0x55
#define OMAP4_VDD_MPU_SR_CMD_REG 0x56
@@ -53,13 +43,6 @@
#define OMAP4_VP_VSTEPMAX_VSTEPMAX 0x04
#define OMAP4_VP_VLIMITTO_TIMEOUT_US 200

-#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 0xA
-#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 0x39
-#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 0xA
-#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 0x2D
-#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 0xA
-#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 0x28
-
static bool is_offset_valid;
static u8 smps_offset;
/*
diff --git a/arch/arm/mach-omap2/voltage.h b/arch/arm/mach-omap2/voltage.h
index b4c6259..1577c2f 100644
--- a/arch/arm/mach-omap2/voltage.h
+++ b/arch/arm/mach-omap2/voltage.h
@@ -107,6 +107,24 @@ struct omap_volt_data {
u8 vp_errgain;
};

+/* Min and max voltages from OMAP perspective */
+#define OMAP3430_VP1_VLIMITTO_VDDMIN 850000
+#define OMAP3430_VP1_VLIMITTO_VDDMAX 1425000
+#define OMAP3430_VP2_VLIMITTO_VDDMIN 900000
+#define OMAP3430_VP2_VLIMITTO_VDDMAX 1150000
+
+#define OMAP3630_VP1_VLIMITTO_VDDMIN 900000
+#define OMAP3630_VP1_VLIMITTO_VDDMAX 1350000
+#define OMAP3630_VP2_VLIMITTO_VDDMIN 900000
+#define OMAP3630_VP2_VLIMITTO_VDDMAX 1200000
+
+#define OMAP4_VP_MPU_VLIMITTO_VDDMIN 830000
+#define OMAP4_VP_MPU_VLIMITTO_VDDMAX 1410000
+#define OMAP4_VP_IVA_VLIMITTO_VDDMIN 830000
+#define OMAP4_VP_IVA_VLIMITTO_VDDMAX 1260000
+#define OMAP4_VP_CORE_VLIMITTO_VDDMIN 830000
+#define OMAP4_VP_CORE_VLIMITTO_VDDMAX 1200000
+
/**
* struct omap_voltdm_pmic - PMIC specific data required by voltage driver.
* @slew_rate: PMIC slew rate (in uv/us)
@@ -130,8 +148,8 @@ struct omap_voltdm_pmic {
u8 vp_erroroffset;
u8 vp_vstepmin;
u8 vp_vstepmax;
- u8 vp_vddmin;
- u8 vp_vddmax;
+ u32 vp_vddmin;
+ u32 vp_vddmax;
u8 vp_timeout_us;
bool i2c_high_speed;
u8 i2c_mcode;
diff --git a/arch/arm/mach-omap2/vp.c b/arch/arm/mach-omap2/vp.c
index 66bd700..16cb6d4 100644
--- a/arch/arm/mach-omap2/vp.c
+++ b/arch/arm/mach-omap2/vp.c
@@ -53,8 +53,8 @@ void __init omap_vp_init(struct voltagedomain *voltdm)
sys_clk_rate = voltdm->sys_clk.rate / 1000;

timeout = (sys_clk_rate * voltdm->pmic->vp_timeout_us) / 1000;
- vddmin = voltdm->pmic->vp_vddmin;
- vddmax = voltdm->pmic->vp_vddmax;
+ vddmin = voltdm->pmic->uv_to_vsel(voltdm->pmic->vp_vddmin);
+ vddmax = voltdm->pmic->uv_to_vsel(voltdm->pmic->vp_vddmax);

waittime = ((voltdm->pmic->step_size / voltdm->pmic->slew_rate) *
sys_clk_rate) / 1000;
--
1.7.4.1