@@ -16,6 +16,7 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
+#include <linux/i2c/twl.h>
#include <plat/voltage.h>
@@ -37,6 +38,28 @@
#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_IVA_SR_VOLT_REG 0x5B
+#define OMAP4_VDD_CORE_SR_VOLT_REG 0x61
+
+#define OMAP4_VP_CONFIG_ERROROFFSET 0x00
+#define OMAP4_VP_VSTEPMIN_VSTEPMIN 0x01
+#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;
+
+#define REG_SMPS_OFFSET 0xE0
+
unsigned long twl4030_vsel_to_uv(const u8 vsel)
{
return (((vsel * 125) + 6000)) * 100;
@@ -47,6 +70,70 @@ u8 twl4030_uv_to_vsel(unsigned long uv)
return DIV_ROUND_UP(uv - 600000, 12500);
}
+unsigned long twl6030_vsel_to_uv(const u8 vsel)
+{
+ /*
+ * In TWL6030 depending on the value of SMPS_OFFSET
+ * efuse register the voltage range supported in
+ * standard mode can be either between 0.6V - 1.3V or
+ * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
+ * is programmed to all 0's where as starting from
+ * TWL6030 ES1.1 the efuse is programmed to 1
+ */
+ if (!is_offset_valid) {
+ twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
+ REG_SMPS_OFFSET);
+ is_offset_valid = true;
+ }
+
+ /*
+ * There is no specific formula for voltage to vsel
+ * conversion above 1.3V. There are special hardcoded
+ * values for voltages above 1.3V. Currently we are
+ * hardcoding only for 1.35 V which is used for 1GH OPP for
+ * OMAP4430.
+ */
+ if (vsel == 0x3A)
+ return 1350000;
+
+ if (smps_offset & 0x8)
+ return ((((vsel - 1) * 125) + 7000)) * 100;
+ else
+ return ((((vsel - 1) * 125) + 6000)) * 100;
+}
+
+u8 twl6030_uv_to_vsel(unsigned long uv)
+{
+ /*
+ * In TWL6030 depending on the value of SMPS_OFFSET
+ * efuse register the voltage range supported in
+ * standard mode can be either between 0.6V - 1.3V or
+ * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
+ * is programmed to all 0's where as starting from
+ * TWL6030 ES1.1 the efuse is programmed to 1
+ */
+ if (!is_offset_valid) {
+ twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
+ REG_SMPS_OFFSET);
+ is_offset_valid = true;
+ }
+
+ /*
+ * There is no specific formula for voltage to vsel
+ * conversion above 1.3V. There are special hardcoded
+ * values for voltages above 1.3V. Currently we are
+ * hardcoding only for 1.35 V which is used for 1GH OPP for
+ * OMAP4430.
+ */
+ if (uv == 1350000)
+ return 0x3A;
+
+ if (smps_offset & 0x8)
+ return DIV_ROUND_UP(uv - 700000, 12500) + 1;
+ else
+ return DIV_ROUND_UP(uv - 600000, 12500) + 1;
+}
+
static struct omap_volt_pmic_info omap3_mpu_volt_info = {
.slew_rate = 4000,
.step_size = 12500,
@@ -87,6 +174,85 @@ static struct omap_volt_pmic_info omap3_core_volt_info = {
.uv_to_vsel = twl4030_uv_to_vsel,
};
+static struct omap_volt_pmic_info omap4_mpu_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1350000,
+ .onlp_volt = 1350000,
+ .ret_volt = 837500,
+ .off_volt = 600000,
+ .volt_setup_time = 0,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP4_VP_MPU_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP4_VP_MPU_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP4_VDD_MPU_SR_VOLT_REG,
+ .vsel_to_uv = twl6030_vsel_to_uv,
+ .uv_to_vsel = twl6030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap4_iva_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1100000,
+ .onlp_volt = 1100000,
+ .ret_volt = 837500,
+ .off_volt = 600000,
+ .volt_setup_time = 0,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP4_VP_IVA_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP4_VP_IVA_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP4_VDD_IVA_SR_VOLT_REG,
+ .vsel_to_uv = twl6030_vsel_to_uv,
+ .uv_to_vsel = twl6030_uv_to_vsel,
+};
+
+static struct omap_volt_pmic_info omap4_core_volt_info = {
+ .slew_rate = 4000,
+ .step_size = 12500,
+ .on_volt = 1100000,
+ .onlp_volt = 1100000,
+ .ret_volt = 837500,
+ .off_volt = 600000,
+ .volt_setup_time = 0,
+ .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
+ .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
+ .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
+ .vp_vddmin = OMAP4_VP_CORE_VLIMITTO_VDDMIN,
+ .vp_vddmax = OMAP4_VP_CORE_VLIMITTO_VDDMAX,
+ .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
+ .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
+ .pmic_reg = OMAP4_VDD_CORE_SR_VOLT_REG,
+ .vsel_to_uv = twl6030_vsel_to_uv,
+ .uv_to_vsel = twl6030_uv_to_vsel,
+};
+
+int __init omap4_twl_init(void)
+{
+ struct voltagedomain *voltdm;
+
+ if (!cpu_is_omap44xx())
+ return -ENODEV;
+
+ voltdm = omap_voltage_domain_lookup("mpu");
+ omap_voltage_register_pmic(voltdm, &omap4_mpu_volt_info);
+
+ voltdm = omap_voltage_domain_lookup("iva");
+ omap_voltage_register_pmic(voltdm, &omap4_iva_volt_info);
+
+ voltdm = omap_voltage_domain_lookup("core");
+ omap_voltage_register_pmic(voltdm, &omap4_core_volt_info);
+
+ return 0;
+}
+
int __init omap3_twl_init(void)
{
struct voltagedomain *voltdm;
@@ -223,6 +223,7 @@ static int __init omap2_common_pm_late_init(void)
{
/* Init the OMAP TWL parameters */
omap3_twl_init();
+ omap4_twl_init();
/* Init the voltage layer */
omap_voltage_late_init();
@@ -114,11 +114,16 @@ static inline void omap_enable_smartreflex_on_init(void) {}
#ifdef CONFIG_TWL4030_CORE
extern int omap3_twl_init(void);
+extern int omap4_twl_init(void);
#else
static inline int omap3_twl_init(void)
{
return -EINVAL;
}
+static inline int omap4_twl_init(void)
+{
+ return -EINVAL;
+}
#endif
#endif