| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1360148051-7560-42-git-send-email-lee.jones@linaro.org>
Date: Wed, 6 Feb 2013 10:54:03 +0000
From: Lee Jones <lee.jones@...aro.org>
To: linux-kernel@...r.kernel.org
Cc: broonie@...nsource.wolfsonmicro.com, linus.walleij@...aro.org,
Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 41/49] regulator: ab8500: Add mode operation for v-amic
v-amic1 and v-amic2 regulators have dedicated mode registers
and share the same mode bit. This patch adds special handling
for those regulators.
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
arch/arm/mach-ux500/board-mop500-regulators.c | 10 +-
drivers/regulator/ab8500.c | 178 ++++++++++++++++++++++---
2 files changed, 167 insertions(+), 21 deletions(-)
diff --git a/arch/arm/mach-ux500/board-mop500-regulators.c b/arch/arm/mach-ux500/board-mop500-regulators.c
index 793bdae..b4b284e 100644
--- a/arch/arm/mach-ux500/board-mop500-regulators.c
+++ b/arch/arm/mach-ux500/board-mop500-regulators.c
@@ -880,7 +880,10 @@ struct regulator_init_data ab8505_regulators[AB8505_NUM_REGULATORS] = {
[AB8505_LDO_ANAMIC1] = {
.constraints = {
.name = "V-AMIC1",
- .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS |
+ REGULATOR_CHANGE_MODE,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL |
+ REGULATOR_MODE_IDLE,
},
.num_consumer_supplies = ARRAY_SIZE(ab8500_vamic1_consumers),
.consumer_supplies = ab8500_vamic1_consumers,
@@ -889,7 +892,10 @@ struct regulator_init_data ab8505_regulators[AB8505_NUM_REGULATORS] = {
[AB8505_LDO_ANAMIC2] = {
.constraints = {
.name = "V-AMIC2",
- .valid_ops_mask = REGULATOR_CHANGE_STATUS,
+ .valid_ops_mask = REGULATOR_CHANGE_STATUS |
+ REGULATOR_CHANGE_MODE,
+ .valid_modes_mask = REGULATOR_MODE_NORMAL |
+ REGULATOR_MODE_IDLE,
},
.num_consumer_supplies = ARRAY_SIZE(ab8500_vamic2_consumers),
.consumer_supplies = ab8500_vamic2_consumers,
diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index 4cd0d28..653c298 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -30,10 +30,22 @@
#include <linux/slab.h>
/**
+ * struct ab8500_shared_mode - is used when mode is shared between
+ * two regulators.
+ * @shared_regulator: pointer to the other sharing regulator
+ * @lp_mode_req: low power mode requested by this regulator
+ */
+struct ab8500_shared_mode {
+ struct ab8500_regulator_info *shared_regulator;
+ bool lp_mode_req;
+};
+
+/**
* struct ab8500_regulator_info - ab8500 regulator information
* @dev: device pointer
* @desc: regulator description
* @regulator_dev: regulator device
+ * @shared_mode: used when mode is shared between two regulators
* @is_enabled: status of regulator (on/off)
* @load_lp_uA: maximum load in idle (low power) mode
* @update_bank: bank to control on/off
@@ -42,6 +54,11 @@
* @update_val: bits holding the regulator current mode
* @update_val_idle: bits to enable the regulator in idle (low power) mode
* @update_val_normal: bits to enable the regulator in normal (high power) mode
+ * @mode_bank: bank with location of mode register
+ * @mode_reg: mode register
+ * @mode_mask: mask for setting mode
+ * @mode_val_idle: mode setting for low power
+ * @mode_val_normal: mode setting for normal power
* @voltage_bank: bank to control regulator voltage
* @voltage_reg: register to control regulator voltage
* @voltage_mask: mask to control regulator voltage
@@ -52,6 +69,7 @@ struct ab8500_regulator_info {
struct device *dev;
struct regulator_desc desc;
struct regulator_dev *regulator;
+ struct ab8500_shared_mode *shared_mode;
bool is_enabled;
int load_lp_uA;
u8 update_bank;
@@ -60,6 +78,11 @@ struct ab8500_regulator_info {
u8 update_val;
u8 update_val_idle;
u8 update_val_normal;
+ u8 mode_bank;
+ u8 mode_reg;
+ u8 mode_mask;
+ u8 mode_val_idle;
+ u8 mode_val_normal;
u8 voltage_bank;
u8 voltage_reg;
u8 voltage_mask;
@@ -191,6 +214,10 @@ static const int ldo_vaudio_voltages[] = {
2600000, /* Duplicated in Vaudio and IsoUicc Control register. */
};
+static DEFINE_MUTEX(shared_mode_mutex);
+static struct ab8500_shared_mode ldo_anamic1_shared;
+static struct ab8500_shared_mode ldo_anamic2_shared;
+
static int ab8500_regulator_enable(struct regulator_dev *rdev)
{
int ret;
@@ -270,7 +297,11 @@ static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
int ret = 0;
-
+ u8 bank;
+ u8 reg;
+ u8 mask;
+ u8 val;
+ bool dmr = false; /* Dedicated mode register */
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
@@ -278,21 +309,72 @@ static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
return -EINVAL;
}
- switch (mode) {
- case REGULATOR_MODE_NORMAL:
- info->update_val = info->update_val_normal;
- break;
- case REGULATOR_MODE_IDLE:
- info->update_val = info->update_val_idle;
- break;
- default:
- return -EINVAL;
+ if (info->shared_mode) {
+ /*
+ * Special case where mode is shared between two regulators.
+ */
+ struct ab8500_shared_mode *sm = info->shared_mode;
+ mutex_lock(&shared_mode_mutex);
+
+ if (mode == REGULATOR_MODE_IDLE) {
+ sm->lp_mode_req = true; /* Low power mode requested */
+ if (!((sm->shared_regulator)->
+ shared_mode->lp_mode_req)) {
+ mutex_unlock(&shared_mode_mutex);
+ return 0; /* Other regulator prevent LP mode */
+ }
+ } else {
+ sm->lp_mode_req = false;
+ }
}
- if (info->is_enabled) {
+ if (info->mode_mask) {
+ /* Dedicated register for handling mode */
+
+ dmr = true;
+
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ val = info->mode_val_normal;
+ break;
+ case REGULATOR_MODE_IDLE:
+ val = info->mode_val_idle;
+ break;
+ default:
+ if (info->shared_mode)
+ mutex_unlock(&shared_mode_mutex);
+ return -EINVAL;
+ }
+
+ bank = info->mode_bank;
+ reg = info->mode_reg;
+ mask = info->mode_mask;
+ } else {
+ /* Mode register same as enable register */
+
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ info->update_val = info->update_val_normal;
+ val = info->update_val_normal;
+ break;
+ case REGULATOR_MODE_IDLE:
+ info->update_val = info->update_val_idle;
+ val = info->update_val_idle;
+ break;
+ default:
+ if (info->shared_mode)
+ mutex_unlock(&shared_mode_mutex);
+ return -EINVAL;
+ }
+
+ bank = info->update_bank;
+ reg = info->update_reg;
+ mask = info->update_mask;
+ }
+
+ if (info->is_enabled || dmr) {
ret = abx500_mask_and_set_register_interruptible(info->dev,
- info->update_bank, info->update_reg,
- info->update_mask, info->update_val);
+ bank, reg, mask, val);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set regulator mode\n");
@@ -300,10 +382,13 @@ static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
dev_vdbg(rdev_get_dev(rdev),
"%s-set_mode (bank, reg, mask, value): "
"0x%x, 0x%x, 0x%x, 0x%x\n",
- info->desc.name, info->update_bank, info->update_reg,
- info->update_mask, info->update_val);
+ info->desc.name, bank, reg,
+ mask, val);
}
+ if (info->shared_mode)
+ mutex_unlock(&shared_mode_mutex);
+
return ret;
}
@@ -311,15 +396,41 @@ static unsigned int ab8500_regulator_get_mode(struct regulator_dev *rdev)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
int ret;
+ u8 val;
+ u8 val_normal;
+ u8 val_idle;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
- if (info->update_val == info->update_val_normal)
+ /* Need special handling for shared mode */
+ if (info->shared_mode) {
+ if (info->shared_mode->lp_mode_req)
+ return REGULATOR_MODE_IDLE;
+ else
+ return REGULATOR_MODE_NORMAL;
+ }
+
+ if (info->mode_mask) {
+ /* Dedicated register for handling mode */
+ ret = abx500_get_register_interruptible(info->dev,
+ info->mode_bank, info->mode_reg, &val);
+ val = val & info->mode_mask;
+
+ val_normal = info->mode_val_normal;
+ val_idle = info->mode_val_idle;
+ } else {
+ /* Mode register same as enable register */
+ val = info->update_val;
+ val_normal = info->update_val_normal;
+ val_idle = info->update_val_idle;
+ }
+
+ if (val == val_normal)
ret = REGULATOR_MODE_NORMAL;
- else if (info->update_val == info->update_val_idle)
+ else if (val == val_idle)
ret = REGULATOR_MODE_IDLE;
else
ret = -EINVAL;
@@ -574,6 +685,15 @@ static struct regulator_ops ab8500_regulator_ops = {
.list_voltage = regulator_list_voltage_table,
};
+static struct regulator_ops ab8500_regulator_anamic_mode_ops = {
+ .enable = ab8500_regulator_enable,
+ .disable = ab8500_regulator_disable,
+ .is_enabled = ab8500_regulator_is_enabled,
+ .set_mode = ab8500_regulator_set_mode,
+ .get_mode = ab8500_regulator_get_mode,
+ .list_voltage = regulator_list_voltage_table,
+};
+
/* AB8500 regulator information */
static struct ab8500_regulator_info
ab8500_regulator_info[AB8500_NUM_REGULATORS] = {
@@ -1004,32 +1124,44 @@ static struct ab8500_regulator_info
[AB8505_LDO_ANAMIC1] = {
.desc = {
.name = "LDO-ANAMIC1",
- .ops = &ab8500_regulator_ops,
+ .ops = &ab8500_regulator_anamic_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8505_LDO_ANAMIC1,
.owner = THIS_MODULE,
.n_voltages = 1,
.volt_table = fixed_2050000_voltage,
},
+ .shared_mode = &ldo_anamic1_shared,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x08,
.update_val = 0x08,
+ .mode_bank = 0x01,
+ .mode_reg = 0x54,
+ .mode_mask = 0x04,
+ .mode_val_idle = 0x04,
+ .mode_val_normal = 0x00,
},
[AB8505_LDO_ANAMIC2] = {
.desc = {
.name = "LDO-ANAMIC2",
- .ops = &ab8500_regulator_ops,
+ .ops = &ab8500_regulator_anamic_mode_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8505_LDO_ANAMIC2,
.owner = THIS_MODULE,
.n_voltages = 1,
.volt_table = fixed_2050000_voltage,
},
+ .shared_mode = &ldo_anamic2_shared,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x10,
.update_val = 0x10,
+ .mode_bank = 0x01,
+ .mode_reg = 0x54,
+ .mode_mask = 0x04,
+ .mode_val_idle = 0x04,
+ .mode_val_normal = 0x00,
},
[AB8505_LDO_AUX8] = {
.desc = {
@@ -1564,6 +1696,14 @@ static struct ab8500_regulator_info
},
};
+static struct ab8500_shared_mode ldo_anamic1_shared = {
+ .shared_regulator = &ab8505_regulator_info[AB8505_LDO_ANAMIC2],
+};
+
+static struct ab8500_shared_mode ldo_anamic2_shared = {
+ .shared_regulator = &ab8505_regulator_info[AB8505_LDO_ANAMIC1],
+};
+
struct ab8500_reg_init {
u8 bank;
u8 addr;
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists