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-rw-r--r--include/sound/l3.h15
-rw-r--r--sound/soc/codecs/l3.c71
2 files changed, 71 insertions, 15 deletions
diff --git a/include/sound/l3.h b/include/sound/l3.h
index 423a08f0f1b0..1471da22adad 100644
--- a/include/sound/l3.h
+++ b/include/sound/l3.h
@@ -2,9 +2,15 @@
#define _L3_H_ 1
struct l3_pins {
- void (*setdat)(int);
- void (*setclk)(int);
- void (*setmode)(int);
+ void (*setdat)(struct l3_pins *, int);
+ void (*setclk)(struct l3_pins *, int);
+ void (*setmode)(struct l3_pins *, int);
+
+ int gpio_data;
+ int gpio_clk;
+ int gpio_mode;
+ int use_gpios;
+
int data_hold;
int data_setup;
int clock_high;
@@ -13,6 +19,9 @@ struct l3_pins {
int mode_setup;
};
+struct device;
+
int l3_write(struct l3_pins *adap, u8 addr, u8 *data, int len);
+int l3_set_gpio_ops(struct device *dev, struct l3_pins *adap);
#endif
diff --git a/sound/soc/codecs/l3.c b/sound/soc/codecs/l3.c
index 5353af58862c..a10ea3c716c6 100644
--- a/sound/soc/codecs/l3.c
+++ b/sound/soc/codecs/l3.c
@@ -20,6 +20,8 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
#include <sound/l3.h>
@@ -32,11 +34,11 @@ static void sendbyte(struct l3_pins *adap, unsigned int byte)
int i;
for (i = 0; i < 8; i++) {
- adap->setclk(0);
+ adap->setclk(adap, 0);
udelay(adap->data_hold);
- adap->setdat(byte & 1);
+ adap->setdat(adap, byte & 1);
udelay(adap->data_setup);
- adap->setclk(1);
+ adap->setclk(adap, 1);
udelay(adap->clock_high);
byte >>= 1;
}
@@ -55,10 +57,10 @@ static void sendbytes(struct l3_pins *adap, const u8 *buf,
for (i = 0; i < len; i++) {
if (i) {
udelay(adap->mode_hold);
- adap->setmode(0);
+ adap->setmode(adap, 0);
udelay(adap->mode);
}
- adap->setmode(1);
+ adap->setmode(adap, 1);
udelay(adap->mode_setup);
sendbyte(adap, buf[i]);
}
@@ -66,26 +68,71 @@ static void sendbytes(struct l3_pins *adap, const u8 *buf,
int l3_write(struct l3_pins *adap, u8 addr, u8 *data, int len)
{
- adap->setclk(1);
- adap->setdat(1);
- adap->setmode(1);
+ adap->setclk(adap, 1);
+ adap->setdat(adap, 1);
+ adap->setmode(adap, 1);
udelay(adap->mode);
- adap->setmode(0);
+ adap->setmode(adap, 0);
udelay(adap->mode_setup);
sendbyte(adap, addr);
udelay(adap->mode_hold);
sendbytes(adap, data, len);
- adap->setclk(1);
- adap->setdat(1);
- adap->setmode(0);
+ adap->setclk(adap, 1);
+ adap->setdat(adap, 1);
+ adap->setmode(adap, 0);
return len;
}
EXPORT_SYMBOL_GPL(l3_write);
+
+static void l3_set_clk(struct l3_pins *adap, int val)
+{
+ gpio_set_value(adap->gpio_clk, val);
+}
+
+static void l3_set_data(struct l3_pins *adap, int val)
+{
+ gpio_set_value(adap->gpio_data, val);
+}
+
+static void l3_set_mode(struct l3_pins *adap, int val)
+{
+ gpio_set_value(adap->gpio_mode, val);
+}
+
+int l3_set_gpio_ops(struct device *dev, struct l3_pins *adap)
+{
+ int ret;
+
+ if (!adap->use_gpios)
+ return -EINVAL;
+
+ ret = devm_gpio_request_one(dev, adap->gpio_data,
+ GPIOF_OUT_INIT_LOW, "l3_data");
+ if (ret < 0)
+ return ret;
+ adap->setdat = l3_set_data;
+
+ ret = devm_gpio_request_one(dev, adap->gpio_clk,
+ GPIOF_OUT_INIT_LOW, "l3_clk");
+ if (ret < 0)
+ return ret;
+ adap->setclk = l3_set_clk;
+
+ ret = devm_gpio_request_one(dev, adap->gpio_mode,
+ GPIOF_OUT_INIT_LOW, "l3_mode");
+ if (ret < 0)
+ return ret;
+ adap->setmode = l3_set_mode;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(l3_set_gpio_ops);
+
MODULE_DESCRIPTION("L3 bit-banging driver");
MODULE_AUTHOR("Christian Pellegrin <chripell@evolware.org>");
MODULE_LICENSE("GPL");