[PATCH 3/4] regulator: add voltage selection capability to mc13783 regulators v2 .
Alberto Panizzo
maramaopercheseimorto at gmail.com
Mon Dec 14 12:26:38 EST 2009
This patch, complete the mc13783 regulator subsystem driver with
voltage selecting capability.
Main Switches (SW1AB, SW2AB) are not supported yet.
version 2 diffs:
- delete the "Switchers PLL" enable and multiplication factor value
selecting capability because it is not a voltage or current regulator.
This will be a part of Main switcher supporting task.
- Correct many coding style problems pointed me out.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto at gmail.com>
Acked-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
drivers/regulator/mc13783-regulator.c | 345 ++++++++++++++++++++++++++++++---
1 files changed, 315 insertions(+), 30 deletions(-)
diff --git a/drivers/regulator/mc13783-regulator.c b/drivers/regulator/mc13783-regulator.c
index 9f99862..3d5d349 100644
--- a/drivers/regulator/mc13783-regulator.c
+++ b/drivers/regulator/mc13783-regulator.c
@@ -2,6 +2,7 @@
* Regulator Driver for Freescale MC13783 PMIC
*
* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer at pengutronix.de>
+ * Copyright 2009 Alberto Panizzo <maramaopercheseimorto at gmail.com>
*
* 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
@@ -16,11 +17,44 @@
#include <linux/init.h>
#include <linux/err.h>
-#define MC13783_REG_SWITCHERS4 28
-#define MC13783_REG_SWITCHERS4_PLLEN (1 << 18)
-
#define MC13783_REG_SWITCHERS5 29
#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
+#define MC13783_REG_SWITCHERS5_SW3VSEL 18
+#define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18)
+
+#define MC13783_REG_REGULATORSETTING0 30
+#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2
+#define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4
+#define MC13783_REG_REGULATORSETTING0_VGENVSEL 6
+#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9
+#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11
+#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13
+#define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14
+#define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15
+#define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16
+
+#define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2)
+#define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4)
+#define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6)
+#define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9)
+#define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11)
+#define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13)
+#define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14)
+#define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15)
+#define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16)
+
+#define MC13783_REG_REGULATORSETTING1 31
+#define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0
+#define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2
+#define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4
+#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6
+#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9
+
+#define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0)
+#define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2)
+#define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4)
+#define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6)
+#define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9)
#define MC13783_REG_REGULATORMODE0 32
#define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0)
@@ -53,14 +87,88 @@ struct mc13783_regulator {
struct regulator_desc desc;
int reg;
int enable_bit;
+ int vsel_reg;
+ int vsel_shift;
+ int vsel_mask;
+ int const *voltages;
+};
+
+/* Voltage Values */
+static const int const mc13783_sw3_val[] = {
+ 5000000, 5000000, 5000000, 5500000,
+};
+
+static const int const mc13783_vaudio_val[] = {
+ 2775000,
+};
+
+static const int const mc13783_viohi_val[] = {
+ 2775000,
+};
+
+static const int const mc13783_violo_val[] = {
+ 1200000, 1300000, 1500000, 1800000,
+};
+
+static const int const mc13783_vdig_val[] = {
+ 1200000, 1300000, 1500000, 1800000,
+};
+
+static const int const mc13783_vgen_val[] = {
+ 1200000, 1300000, 1500000, 1800000,
+ 1100000, 2000000, 2775000, 2400000,
+};
+
+static const int const mc13783_vrfdig_val[] = {
+ 1200000, 1500000, 1800000, 1875000,
+};
+
+static const int const mc13783_vrfref_val[] = {
+ 2475000, 2600000, 2700000, 2775000,
+};
+
+static const int const mc13783_vrfcp_val[] = {
+ 2700000, 2775000,
+};
+
+static const int const mc13783_vsim_val[] = {
+ 1800000, 2900000, 3000000,
+};
+
+static const int const mc13783_vesim_val[] = {
+ 1800000, 2900000,
+};
+
+static const int const mc13783_vcam_val[] = {
+ 1500000, 1800000, 2500000, 2550000,
+ 2600000, 2750000, 2800000, 3000000,
+};
+
+static const int const mc13783_vrfbg_val[] = {
+ 1250000,
+};
+
+static const int const mc13783_vvib_val[] = {
+ 1300000, 1800000, 2000000, 3000000,
+};
+
+static const int const mc13783_vmmc_val[] = {
+ 1600000, 1800000, 2000000, 2600000,
+ 2700000, 2800000, 2900000, 3000000,
+};
+
+static const int const mc13783_vrf_val[] = {
+ 1500000, 1875000, 2700000, 2775000,
};
static struct regulator_ops mc13783_regulator_ops;
+static struct regulator_ops mc13783_fixed_regulator_ops;
-#define MC13783_DEFINE(prefix, _name, _reg) \
+#define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages) \
[MC13783_ ## prefix ## _ ## _name] = { \
.desc = { \
.name = #prefix "_" #_name, \
+ .n_voltages = ARRAY_SIZE(_voltages), \
.ops = &mc13783_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = MC13783_ ## prefix ## _ ## _name, \
@@ -68,36 +176,83 @@ static struct regulator_ops mc13783_regulator_ops;
}, \
.reg = MC13783_REG_ ## _reg, \
.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
+ .vsel_reg = MC13783_REG_ ## _vsel_reg, \
+ .vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
+ .vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
+ .voltages = _voltages, \
}
-#define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg)
-#define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg)
+#define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages) \
+ [MC13783_ ## prefix ## _ ## _name] = { \
+ .desc = { \
+ .name = #prefix "_" #_name, \
+ .n_voltages = ARRAY_SIZE(_voltages), \
+ .ops = &mc13783_fixed_regulator_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MC13783_ ## prefix ## _ ## _name, \
+ .owner = THIS_MODULE, \
+ }, \
+ .reg = MC13783_REG_ ## _reg, \
+ .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
+ .voltages = _voltages, \
+ }
+
+#define MC13783_GPO_DEFINE(prefix, _name, _reg) \
+ [MC13783_ ## prefix ## _ ## _name] = { \
+ .desc = { \
+ .name = #prefix "_" #_name, \
+ .ops = &mc13783_regulator_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = MC13783_ ## prefix ## _ ## _name, \
+ .owner = THIS_MODULE, \
+ }, \
+ .reg = MC13783_REG_ ## _reg, \
+ .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
+ }
+
+#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \
+ MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages)
+#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \
+ MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages)
static struct mc13783_regulator mc13783_regulators[] = {
- MC13783_DEFINE_SW(SW3, SWITCHERS5),
- MC13783_DEFINE_SW(PLL, SWITCHERS4),
-
- MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0),
- MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0),
- MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0),
- MC13783_DEFINE_REGU(VDIG, REGULATORMODE0),
- MC13783_DEFINE_REGU(VGEN, REGULATORMODE0),
- MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0),
- MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0),
- MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0),
- MC13783_DEFINE_REGU(VSIM, REGULATORMODE1),
- MC13783_DEFINE_REGU(VESIM, REGULATORMODE1),
- MC13783_DEFINE_REGU(VCAM, REGULATORMODE1),
- MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1),
- MC13783_DEFINE_REGU(VVIB, REGULATORMODE1),
- MC13783_DEFINE_REGU(VRF1, REGULATORMODE1),
- MC13783_DEFINE_REGU(VRF2, REGULATORMODE1),
- MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1),
- MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1),
- MC13783_DEFINE_REGU(GPO1, POWERMISC),
- MC13783_DEFINE_REGU(GPO2, POWERMISC),
- MC13783_DEFINE_REGU(GPO3, POWERMISC),
- MC13783_DEFINE_REGU(GPO4, POWERMISC),
+ MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
+
+ MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
+ MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val),
+ MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \
+ mc13783_violo_val),
+ MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \
+ mc13783_vdig_val),
+ MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \
+ mc13783_vgen_val),
+ MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \
+ mc13783_vrfdig_val),
+ MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \
+ mc13783_vrfref_val),
+ MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \
+ mc13783_vrfcp_val),
+ MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \
+ mc13783_vsim_val),
+ MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \
+ mc13783_vesim_val),
+ MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \
+ mc13783_vcam_val),
+ MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
+ MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \
+ mc13783_vvib_val),
+ MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \
+ mc13783_vrf_val),
+ MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \
+ mc13783_vrf_val),
+ MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \
+ mc13783_vmmc_val),
+ MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \
+ mc13783_vmmc_val),
+ MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC),
+ MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC),
+ MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC),
+ MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC),
};
struct mc13783_regulator_priv {
@@ -154,10 +309,140 @@ static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
return (val & mc13783_regulators[id].enable_bit) != 0;
}
+static int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
+ unsigned selector)
+{
+ int id = rdev_get_id(rdev);
+
+ if (selector >= mc13783_regulators[id].desc.n_voltages)
+ return -EINVAL;
+
+ return mc13783_regulators[id].voltages[selector];
+}
+
+static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ int reg_id = rdev_get_id(rdev);
+ int i;
+ int bestmatch;
+ int bestindex;
+
+ /*
+ * Locate the minimum voltage fitting the criteria on
+ * this regulator. The switchable voltages are not
+ * in strict falling order so we need to check them
+ * all for the best match.
+ */
+ bestmatch = INT_MAX;
+ bestindex = -1;
+ for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
+ if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
+ mc13783_regulators[reg_id].voltages[i] < bestmatch) {
+ bestmatch = mc13783_regulators[reg_id].voltages[i];
+ bestindex = i;
+ }
+ }
+
+ if (bestindex < 0 || bestmatch > max_uV) {
+ dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
+ min_uV, max_uV);
+ return -EINVAL;
+ }
+ return bestindex;
+}
+
+static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
+ int value, id = rdev_get_id(rdev);
+ int ret;
+
+ dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
+ __func__, id, min_uV, max_uV);
+
+ /* Find the best index */
+ value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
+ dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
+ if (value < 0)
+ return value;
+
+ mc13783_lock(priv->mc13783);
+ ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
+ mc13783_regulators[id].vsel_mask,
+ value << mc13783_regulators[id].vsel_shift);
+ mc13783_unlock(priv->mc13783);
+
+ return ret;
+}
+
+static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
+{
+ struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
+ int ret, id = rdev_get_id(rdev);
+ unsigned int val;
+
+ dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
+
+ mc13783_lock(priv->mc13783);
+ ret = mc13783_reg_read(priv->mc13783,
+ mc13783_regulators[id].vsel_reg, &val);
+ mc13783_unlock(priv->mc13783);
+
+ if (ret)
+ return ret;
+
+ val = (val & mc13783_regulators[id].vsel_mask)
+ >> mc13783_regulators[id].vsel_shift;
+
+ dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
+
+ BUG_ON(val < 0 || val > mc13783_regulators[id].desc.n_voltages);
+
+ return mc13783_regulators[id].voltages[val];
+}
+
static struct regulator_ops mc13783_regulator_ops = {
.enable = mc13783_regulator_enable,
.disable = mc13783_regulator_disable,
.is_enabled = mc13783_regulator_is_enabled,
+ .list_voltage = mc13783_regulator_list_voltage,
+ .set_voltage = mc13783_regulator_set_voltage,
+ .get_voltage = mc13783_regulator_get_voltage,
+};
+
+static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
+ int min_uV, int max_uV)
+{
+ int id = rdev_get_id(rdev);
+
+ dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
+ __func__, id, min_uV, max_uV);
+
+ if (min_uV > mc13783_regulators[id].voltages[0] &&
+ max_uV < mc13783_regulators[id].voltages[0])
+ return 0;
+ else
+ return -EINVAL;
+}
+
+static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
+{
+ int id = rdev_get_id(rdev);
+
+ dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
+
+ return mc13783_regulators[id].voltages[0];
+}
+
+static struct regulator_ops mc13783_fixed_regulator_ops = {
+ .enable = mc13783_regulator_enable,
+ .disable = mc13783_regulator_disable,
+ .is_enabled = mc13783_regulator_is_enabled,
+ .list_voltage = mc13783_regulator_list_voltage,
+ .set_voltage = mc13783_fixed_regulator_set_voltage,
+ .get_voltage = mc13783_fixed_regulator_get_voltage,
};
static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
--
1.6.3.3
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