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authorThara Gopinath <thara@ti.com>2010-12-10 22:51:05 +0530
committerKevin Hilman <khilman@deeprootsystems.com>2010-12-22 14:31:41 -0800
commitfbc319f67660ede23cc22f3af5df559693f8062e (patch)
tree52c817cbc5110d9018d7e6fa5a8d34cd840655c5 /arch/arm/mach-omap2/omap_twl.c
parentfa765823a3cbb9ce1b13ce2832109a50d899c471 (diff)
OMAP3: PM: Register TWL4030 pmic info with the voltage driver.
This patch registers the TWL4030 PMIC specific informtion with the voltage driver. Failing this patch the voltage driver is unware of the formula to use for vsel to voltage and vice versa conversion and lot of other PMIC dependent parameters. This file is based on the arch/arm/plat-omap opp_twl_tpl.c file by Paul Walmsley. The original file is replaced by this file. Signed-off-by: Thara Gopinath <thara@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-omap2/omap_twl.c')
-rw-r--r--arch/arm/mach-omap2/omap_twl.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
new file mode 100644
index 00000000000..b8f08742a6f
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -0,0 +1,111 @@
+/**
+ * OMAP and TWL PMIC specific intializations.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated.
+ * Thara Gopinath
+ * Copyright (C) 2009 Texas Instruments Incorporated.
+ * Nishanth Menon
+ * Copyright (C) 2009 Nokia Corporation
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+
+#include <plat/voltage.h>
+
+#define OMAP3_SRI2C_SLAVE_ADDR 0x12
+#define OMAP3_VDD_MPU_SR_CONTROL_REG 0x00
+#define OMAP3_VDD_CORE_SR_CONTROL_REG 0x01
+#define OMAP3_VP_CONFIG_ERROROFFSET 0x00
+#define OMAP3_VP_VSTEPMIN_VSTEPMIN 0x1
+#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
+
+unsigned long twl4030_vsel_to_uv(const u8 vsel)
+{
+ return (((vsel * 125) + 6000)) * 100;
+}
+
+u8 twl4030_uv_to_vsel(unsigned long uv)
+{
+ return DIV_ROUND_UP(uv - 600000, 12500);
+}
+
+static struct omap_volt_pmic_info omap3_mpu_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1200000,
+ .onlp_volt = 1000000,
+ .ret_volt = 975000,
+ .off_volt = 600000,
+ .volt_setup_time = 0xfff,
+ .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP3430_VP1_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP3430_VP1_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP3_VDD_MPU_SR_CONTROL_REG,
+ .vsel_to_uv = twl4030_vsel_to_uv,
+ .uv_to_vsel = twl4030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap3_core_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1200000,
+ .onlp_volt = 1000000,
+ .ret_volt = 975000,
+ .off_volt = 600000,
+ .volt_setup_time = 0xfff,
+ .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP3430_VP2_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP3430_VP2_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP3_VDD_CORE_SR_CONTROL_REG,
+ .vsel_to_uv = twl4030_vsel_to_uv,
+ .uv_to_vsel = twl4030_uv_to_vsel,
+};
+
+int __init omap3_twl_init(void)
+{
+ struct voltagedomain *voltdm;
+
+ if (!cpu_is_omap34xx())
+ return -ENODEV;
+
+ if (cpu_is_omap3630()) {
+ omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN;
+ omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX;
+ omap3_core_volt_info.vp_vddmin = OMAP3630_VP2_VLIMITTO_VDDMIN;
+ omap3_core_volt_info.vp_vddmax = OMAP3630_VP2_VLIMITTO_VDDMAX;
+ }
+
+ voltdm = omap_voltage_domain_lookup("mpu");
+ omap_voltage_register_pmic(voltdm, &omap3_mpu_volt_info);
+
+ voltdm = omap_voltage_domain_lookup("core");
+ omap_voltage_register_pmic(voltdm, &omap3_core_volt_info);
+
+ return 0;
+}