fingerprint: fpc: Config power down mode for rst pin
pin 131 (gpp4-3) 3:gpp4 CON(0x1) DAT(0x1) PUD(0x1) DRV(0x0) CON_PDN(0x1) PUD_PDN(0x3)
Bug: 187150932
Test: build pass, verify on device
Change-Id: I7c21a7f7e4350a0e209125b168ce94af11835826
diff --git a/fpc1020_platform_tee.c b/fpc1020_platform_tee.c
index a7a8338..43e631d 100644
--- a/fpc1020_platform_tee.c
+++ b/fpc1020_platform_tee.c
@@ -48,6 +48,8 @@
#define NUM_PARAMS_REG_ENABLE_SET 2
+const char *rst_gpio_power_down_state = "rst,power_down";
+
struct vreg_config {
char *name;
unsigned long vmin;
@@ -72,6 +74,8 @@
struct mutex lock; /* To set/get exported values in sysfs */
bool prepared;
atomic_t wakeup_enabled; /* Used both in ISR and non-ISR */
+ struct pinctrl *rst_pinctrl;
+ struct pinctrl_state *rst_state;
};
static int vreg_setup(struct fpc1020_data *fpc1020, const char *name,
@@ -466,6 +470,34 @@
}
+static int config_rst_power_down(struct fpc1020_data *fpc_data) {
+
+ struct device *dev = fpc_data->dev;
+ int result = 0;
+
+ fpc_data->rst_pinctrl = devm_pinctrl_get(dev);
+ if (IS_ERR(fpc_data->rst_pinctrl)) {
+ dev_err(dev, "%s: Can't get pinctrl\n",__func__);
+ return -1;
+ }
+
+ fpc_data->rst_state = pinctrl_lookup_state(fpc_data->rst_pinctrl, rst_gpio_power_down_state);
+ if (IS_ERR_OR_NULL(fpc_data->rst_state)) {
+ dev_err(dev, "%s: Failed to lookup reset lower power state\n",__func__);
+ return -1;
+ }
+
+ result = pinctrl_select_state(fpc_data->rst_pinctrl, fpc_data->rst_state);
+ if (result) {
+ dev_err(dev, "%s: Can not set %s state\n",__func__, rst_gpio_power_down_state);
+ return -1;
+ }
+
+ dev_info(dev, "%s: finish\n",__func__);
+ return 0;
+}
+
+
static int fpc1020_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -491,6 +523,11 @@
goto exit;
}
+ // Config reset lower power state
+ rc = config_rst_power_down(fpc1020);
+ if (rc)
+ goto exit;
+
// Request IRQ and Reset pin GPIO
rc = fpc1020_request_named_gpio(fpc1020, "fpc,gpio_irq",
&fpc1020->irq_gpio);
