diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-cbus-gpio.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-cbus-gpio.c | 80 |
1 files changed, 30 insertions, 50 deletions
diff --git a/drivers/i2c/busses/i2c-cbus-gpio.c b/drivers/i2c/busses/i2c-cbus-gpio.c index b4f91e48948a..72df563477b1 100644 --- a/drivers/i2c/busses/i2c-cbus-gpio.c +++ b/drivers/i2c/busses/i2c-cbus-gpio.c @@ -18,16 +18,14 @@ #include <linux/io.h> #include <linux/i2c.h> -#include <linux/gpio.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/of_gpio.h> +#include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/platform_device.h> -#include <linux/platform_data/i2c-cbus-gpio.h> /* * Bit counts are derived from Nokia implementation. These should be checked @@ -39,9 +37,9 @@ struct cbus_host { spinlock_t lock; /* host lock */ struct device *dev; - int clk_gpio; - int dat_gpio; - int sel_gpio; + struct gpio_desc *clk; + struct gpio_desc *dat; + struct gpio_desc *sel; }; /** @@ -51,9 +49,9 @@ struct cbus_host { */ static void cbus_send_bit(struct cbus_host *host, unsigned bit) { - gpio_set_value(host->dat_gpio, bit ? 1 : 0); - gpio_set_value(host->clk_gpio, 1); - gpio_set_value(host->clk_gpio, 0); + gpiod_set_value(host->dat, bit ? 1 : 0); + gpiod_set_value(host->clk, 1); + gpiod_set_value(host->clk, 0); } /** @@ -78,9 +76,9 @@ static int cbus_receive_bit(struct cbus_host *host) { int ret; - gpio_set_value(host->clk_gpio, 1); - ret = gpio_get_value(host->dat_gpio); - gpio_set_value(host->clk_gpio, 0); + gpiod_set_value(host->clk, 1); + ret = gpiod_get_value(host->dat); + gpiod_set_value(host->clk, 0); return ret; } @@ -123,10 +121,10 @@ static int cbus_transfer(struct cbus_host *host, char rw, unsigned dev, spin_lock_irqsave(&host->lock, flags); /* Reset state and start of transfer, SEL stays down during transfer */ - gpio_set_value(host->sel_gpio, 0); + gpiod_set_value(host->sel, 0); /* Set the DAT pin to output */ - gpio_direction_output(host->dat_gpio, 1); + gpiod_direction_output(host->dat, 1); /* Send the device address */ cbus_send_data(host, dev, CBUS_ADDR_BITS); @@ -141,12 +139,12 @@ static int cbus_transfer(struct cbus_host *host, char rw, unsigned dev, cbus_send_data(host, data, 16); ret = 0; } else { - ret = gpio_direction_input(host->dat_gpio); + ret = gpiod_direction_input(host->dat); if (ret) { dev_dbg(host->dev, "failed setting direction\n"); goto out; } - gpio_set_value(host->clk_gpio, 1); + gpiod_set_value(host->clk, 1); ret = cbus_receive_word(host); if (ret < 0) { @@ -156,9 +154,9 @@ static int cbus_transfer(struct cbus_host *host, char rw, unsigned dev, } /* Indicate end of transfer, SEL goes up until next transfer */ - gpio_set_value(host->sel_gpio, 1); - gpio_set_value(host->clk_gpio, 1); - gpio_set_value(host->clk_gpio, 0); + gpiod_set_value(host->sel, 1); + gpiod_set_value(host->clk, 1); + gpiod_set_value(host->clk, 0); out: spin_unlock_irqrestore(&host->lock, flags); @@ -214,7 +212,6 @@ static int cbus_i2c_probe(struct platform_device *pdev) { struct i2c_adapter *adapter; struct cbus_host *chost; - int ret; adapter = devm_kzalloc(&pdev->dev, sizeof(struct i2c_adapter), GFP_KERNEL); @@ -225,22 +222,20 @@ static int cbus_i2c_probe(struct platform_device *pdev) if (!chost) return -ENOMEM; - if (pdev->dev.of_node) { - struct device_node *dnode = pdev->dev.of_node; - if (of_gpio_count(dnode) != 3) - return -ENODEV; - chost->clk_gpio = of_get_gpio(dnode, 0); - chost->dat_gpio = of_get_gpio(dnode, 1); - chost->sel_gpio = of_get_gpio(dnode, 2); - } else if (dev_get_platdata(&pdev->dev)) { - struct i2c_cbus_platform_data *pdata = - dev_get_platdata(&pdev->dev); - chost->clk_gpio = pdata->clk_gpio; - chost->dat_gpio = pdata->dat_gpio; - chost->sel_gpio = pdata->sel_gpio; - } else { + if (gpiod_count(&pdev->dev, NULL) != 3) return -ENODEV; - } + chost->clk = devm_gpiod_get_index(&pdev->dev, NULL, 0, GPIOD_OUT_LOW); + if (IS_ERR(chost->clk)) + return PTR_ERR(chost->clk); + chost->dat = devm_gpiod_get_index(&pdev->dev, NULL, 1, GPIOD_IN); + if (IS_ERR(chost->dat)) + return PTR_ERR(chost->dat); + chost->sel = devm_gpiod_get_index(&pdev->dev, NULL, 2, GPIOD_OUT_HIGH); + if (IS_ERR(chost->sel)) + return PTR_ERR(chost->sel); + gpiod_set_consumer_name(chost->clk, "CBUS clk"); + gpiod_set_consumer_name(chost->dat, "CBUS dat"); + gpiod_set_consumer_name(chost->sel, "CBUS sel"); adapter->owner = THIS_MODULE; adapter->class = I2C_CLASS_HWMON; @@ -254,21 +249,6 @@ static int cbus_i2c_probe(struct platform_device *pdev) spin_lock_init(&chost->lock); chost->dev = &pdev->dev; - ret = devm_gpio_request_one(&pdev->dev, chost->clk_gpio, - GPIOF_OUT_INIT_LOW, "CBUS clk"); - if (ret) - return ret; - - ret = devm_gpio_request_one(&pdev->dev, chost->dat_gpio, GPIOF_IN, - "CBUS data"); - if (ret) - return ret; - - ret = devm_gpio_request_one(&pdev->dev, chost->sel_gpio, - GPIOF_OUT_INIT_HIGH, "CBUS sel"); - if (ret) - return ret; - i2c_set_adapdata(adapter, chost); platform_set_drvdata(pdev, adapter); |