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path: root/drivers/power/twl4030_charger.c
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Diffstat (limited to 'drivers/power/twl4030_charger.c')
-rw-r--r--drivers/power/twl4030_charger.c93
1 files changed, 84 insertions, 9 deletions
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index fdad850c77d3..15f4d5d8611b 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -15,12 +15,14 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/i2c/twl.h>
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
+#include <linux/regulator/machine.h>
#define TWL4030_BCIMSTATEC 0x02
#define TWL4030_BCIICHG 0x08
@@ -28,6 +30,7 @@
#define TWL4030_BCIVBUS 0x0c
#define TWL4030_BCIMFSTS4 0x10
#define TWL4030_BCICTL1 0x23
+#define TWL4030_BB_CFG 0x12
#define TWL4030_BCIAUTOWEN BIT(5)
#define TWL4030_CONFIG_DONE BIT(4)
@@ -37,6 +40,17 @@
#define TWL4030_USBFASTMCHG BIT(2)
#define TWL4030_STS_VBUS BIT(7)
#define TWL4030_STS_USB_ID BIT(2)
+#define TWL4030_BBCHEN BIT(4)
+#define TWL4030_BBSEL_MASK 0b1100
+#define TWL4030_BBSEL_2V5 0b0000
+#define TWL4030_BBSEL_3V0 0b0100
+#define TWL4030_BBSEL_3V1 0b1000
+#define TWL4030_BBSEL_3V2 0b1100
+#define TWL4030_BBISEL_MASK 0b11
+#define TWL4030_BBISEL_25uA 0b00
+#define TWL4030_BBISEL_150uA 0b01
+#define TWL4030_BBISEL_500uA 0b10
+#define TWL4030_BBISEL_1000uA 0b11
/* BCI interrupts */
#define TWL4030_WOVF BIT(0) /* Watchdog overflow */
@@ -74,6 +88,8 @@ struct twl4030_bci {
struct work_struct work;
int irq_chg;
int irq_bci;
+ struct regulator *usb_reg;
+ int usb_enabled;
unsigned long event;
};
@@ -103,7 +119,7 @@ static int twl4030_bci_read(u8 reg, u8 *val)
static int twl4030_clear_set_boot_bci(u8 clear, u8 set)
{
- return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, 0,
+ return twl4030_clear_set(TWL4030_MODULE_PM_MASTER, clear,
TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set,
TWL4030_PM_MASTER_BOOT_BCI);
}
@@ -151,14 +167,14 @@ static int twl4030_bci_have_vbus(struct twl4030_bci *bci)
}
/*
- * Enable/Disable USB Charge funtionality.
+ * Enable/Disable USB Charge functionality.
*/
static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
{
int ret;
if (enable) {
- /* Check for USB charger conneted */
+ /* Check for USB charger connected */
if (!twl4030_bci_have_vbus(bci))
return -ENODEV;
@@ -171,6 +187,12 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
return -EACCES;
}
+ /* Need to keep regulator on */
+ if (!bci->usb_enabled) {
+ regulator_enable(bci->usb_reg);
+ bci->usb_enabled = 1;
+ }
+
/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
if (ret < 0)
@@ -181,6 +203,10 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
} else {
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
+ if (bci->usb_enabled) {
+ regulator_disable(bci->usb_reg);
+ bci->usb_enabled = 0;
+ }
}
return ret;
@@ -202,6 +228,49 @@ static int twl4030_charger_enable_ac(bool enable)
}
/*
+ * Enable/Disable charging of Backup Battery.
+ */
+static int twl4030_charger_enable_backup(int uvolt, int uamp)
+{
+ int ret;
+ u8 flags;
+
+ if (uvolt < 2500000 ||
+ uamp < 25) {
+ /* disable charging of backup battery */
+ ret = twl4030_clear_set(TWL4030_MODULE_PM_RECEIVER,
+ TWL4030_BBCHEN, 0, TWL4030_BB_CFG);
+ return ret;
+ }
+
+ flags = TWL4030_BBCHEN;
+ if (uvolt >= 3200000)
+ flags |= TWL4030_BBSEL_3V2;
+ else if (uvolt >= 3100000)
+ flags |= TWL4030_BBSEL_3V1;
+ else if (uvolt >= 3000000)
+ flags |= TWL4030_BBSEL_3V0;
+ else
+ flags |= TWL4030_BBSEL_2V5;
+
+ if (uamp >= 1000)
+ flags |= TWL4030_BBISEL_1000uA;
+ else if (uamp >= 500)
+ flags |= TWL4030_BBISEL_500uA;
+ else if (uamp >= 150)
+ flags |= TWL4030_BBISEL_150uA;
+ else
+ flags |= TWL4030_BBISEL_25uA;
+
+ ret = twl4030_clear_set(TWL4030_MODULE_PM_RECEIVER,
+ TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK,
+ flags,
+ TWL4030_BB_CFG);
+
+ return ret;
+}
+
+/*
* TWL4030 CHG_PRES (AC charger presence) events
*/
static irqreturn_t twl4030_charger_interrupt(int irq, void *arg)
@@ -424,6 +493,7 @@ static enum power_supply_property twl4030_charger_props[] = {
static int __init twl4030_bci_probe(struct platform_device *pdev)
{
struct twl4030_bci *bci;
+ struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data;
int ret;
u32 reg;
@@ -455,6 +525,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
bci->usb.get_property = twl4030_bci_get_property;
+ bci->usb_reg = regulator_get(bci->dev, "bci3v1");
+
ret = power_supply_register(&pdev->dev, &bci->usb);
if (ret) {
dev_err(&pdev->dev, "failed to register usb: %d\n", ret);
@@ -479,8 +551,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
INIT_WORK(&bci->work, twl4030_bci_usb_work);
- bci->transceiver = usb_get_transceiver();
- if (bci->transceiver != NULL) {
+ bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
+ if (!IS_ERR_OR_NULL(bci->transceiver)) {
bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
usb_register_notifier(bci->transceiver, &bci->usb_nb);
}
@@ -503,13 +575,15 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
twl4030_charger_enable_ac(true);
twl4030_charger_enable_usb(bci, true);
+ twl4030_charger_enable_backup(pdata->bb_uvolt,
+ pdata->bb_uamp);
return 0;
fail_unmask_interrupts:
- if (bci->transceiver != NULL) {
+ if (!IS_ERR_OR_NULL(bci->transceiver)) {
usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
- usb_put_transceiver(bci->transceiver);
+ usb_put_phy(bci->transceiver);
}
free_irq(bci->irq_bci, bci);
fail_bci_irq:
@@ -531,6 +605,7 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
twl4030_charger_enable_ac(false);
twl4030_charger_enable_usb(bci, false);
+ twl4030_charger_enable_backup(0, 0);
/* mask interrupts */
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
@@ -538,9 +613,9 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
TWL4030_INTERRUPTS_BCIIMR2A);
- if (bci->transceiver != NULL) {
+ if (!IS_ERR_OR_NULL(bci->transceiver)) {
usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
- usb_put_transceiver(bci->transceiver);
+ usb_put_phy(bci->transceiver);
}
free_irq(bci->irq_bci, bci);
free_irq(bci->irq_chg, bci);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-02 02:33:40 +0300