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Date: Mon, 28 Sep 2015 23:33:02 +0200
From: Petr Cvek <petr.cvek@....cz>
To: robert.jarzmik@...e.fr, philipp.zabel@...il.com, daniel@...que.org,
haojian.zhuang@...il.com, linux@....linux.org.uk
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 13/26] ARM: pxa: magician: Fix and add charging detection
functions
This patch fixes the charging detection functions for pda_power driver
(according to newly discovered EGPIOs) and add NiCd backup accumulator
charging support.
Signed-off-by: Petr Cvek <petr.cvek@....cz>
---
arch/arm/mach-pxa/magician.c | 57 ++++++++++++++++++++++++++++++++++++++------
1 file changed, 50 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index b645288..906df6d 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -596,18 +596,59 @@ static struct platform_device gpio_vbus = {
* External power
*/
-static int power_supply_init(struct device *dev)
+static int magician_supply_init(struct device *dev)
{
- return gpio_request(EGPIO_MAGICIAN_CABLE_TYPE, "Cable USB/AC type");
+ int ret = -1;
+
+ ret = gpio_request(EGPIO_MAGICIAN_CABLE_TYPE, "Cable is AC charger");
+ if (ret) {
+ pr_err("Cannot request AC/USB charger GPIO (%i)\n", ret);
+ goto err_ac;
+ }
+
+ ret = gpio_request(EGPIO_MAGICIAN_CABLE_INSERTED, "Cable inserted");
+ if (ret) {
+ pr_err("Cannot request cable detection GPIO (%i)\n", ret);
+ goto err_usb;
+ }
+
+ return 0;
+
+err_usb:
+ gpio_free(EGPIO_MAGICIAN_CABLE_TYPE);
+err_ac:
+ return ret;
+}
+
+static void magician_set_charge(int flags)
+{
+ if (flags & PDA_POWER_CHARGE_AC) {
+ pr_debug("Charging from AC\n");
+ gpio_set_value(EGPIO_MAGICIAN_NICD_CHARGE, 1);
+ } else if (flags & PDA_POWER_CHARGE_USB) {
+ pr_debug("Charging from USB\n");
+ gpio_set_value(EGPIO_MAGICIAN_NICD_CHARGE, 1);
+ } else {
+ pr_debug("Charging disabled\n");
+ gpio_set_value(EGPIO_MAGICIAN_NICD_CHARGE, 0);
+ }
}
static int magician_is_ac_online(void)
{
- return gpio_get_value(EGPIO_MAGICIAN_CABLE_TYPE);
+ return gpio_get_value(EGPIO_MAGICIAN_CABLE_INSERTED) &&
+ gpio_get_value(EGPIO_MAGICIAN_CABLE_TYPE); /* AC=1 */
+}
+
+static int magician_is_usb_online(void)
+{
+ return gpio_get_value(EGPIO_MAGICIAN_CABLE_INSERTED) &&
+ (!gpio_get_value(EGPIO_MAGICIAN_CABLE_TYPE)); /* USB=0 */
}
-static void power_supply_exit(struct device *dev)
+static void magician_supply_exit(struct device *dev)
{
+ gpio_free(EGPIO_MAGICIAN_CABLE_INSERTED);
gpio_free(EGPIO_MAGICIAN_CABLE_TYPE);
}
@@ -616,9 +657,11 @@ static char *magician_supplicants[] = {
};
static struct pda_power_pdata power_supply_info = {
- .init = power_supply_init,
+ .init = magician_supply_init,
+ .exit = magician_supply_exit,
.is_ac_online = magician_is_ac_online,
- .exit = power_supply_exit,
+ .is_usb_online = magician_is_usb_online,
+ .set_charge = magician_set_charge,
.supplied_to = magician_supplicants,
.num_supplicants = ARRAY_SIZE(magician_supplicants),
};
@@ -683,7 +726,7 @@ static struct gpio_regulator_config bq24022_info = {
.enable_gpio = GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
.enable_high = 0,
- .enabled_at_boot = 0,
+ .enabled_at_boot = 1,
.gpios = bq24022_gpios,
.nr_gpios = ARRAY_SIZE(bq24022_gpios),
--
1.7.12.1
--
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