diff options
| author |   Chris Packham <chris.packham@alliedtelesis.co.nz> | 2017-06-26 12:44:32 +1200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2017-06-27 21:47:54 +0200 |
| commit | 0e8ce93bdceb6d36a3c1db2227d3f51168fb796c (patch) | |
| tree | 4977a7b5d91256ea7e47635e46aba44c986f7657 /drivers/i2c | |
| parent | i2c: pca-platform: switch to struct gpio_desc (diff) | |
| download | linux-dev-0e8ce93bdceb6d36a3c1db2227d3f51168fb796c.tar.xz linux-dev-0e8ce93bdceb6d36a3c1db2227d3f51168fb796c.zip | |
i2c: pca-platform: add devicetree awareness
Allow devices that use this driver to be registered via a
devicetree.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
[wsa: fixed leakage when registering GPIO failed]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-pca-platform.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-pca-platform.c b/drivers/i2c/busses/i2c-pca-platform.c index 9f995b8ed587..31d7f76ddd94 100644 --- a/drivers/i2c/busses/i2c-pca-platform.c +++ b/drivers/i2c/busses/i2c-pca-platform.c @@ -24,6 +24,8 @@ #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> #include <asm/irq.h> @@ -137,12 +139,15 @@ static int i2c_pca_pf_probe(struct platform_device *pdev) struct resource *res; struct i2c_pca9564_pf_platform_data *platform_data = dev_get_platdata(&pdev->dev); + struct device_node *np = pdev->dev.of_node; int ret = 0; int irq; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); /* If irq is 0, we do polling. */ + if (irq < 0) + irq = 0; if (res == NULL) { ret = -ENODEV; @@ -178,6 +183,7 @@ static int i2c_pca_pf_probe(struct platform_device *pdev) (unsigned long) res->start); i2c->adap.algo_data = &i2c->algo_data; i2c->adap.dev.parent = &pdev->dev; + i2c->adap.dev.of_node = np; if (platform_data) { i2c->adap.timeout = platform_data->timeout; @@ -196,6 +202,15 @@ static int i2c_pca_pf_probe(struct platform_device *pdev) i2c->gpio = NULL; } } + } else if (np) { + i2c->adap.timeout = HZ; + i2c->gpio = devm_gpiod_get_optional(&pdev->dev, "reset-gpios", GPIOD_OUT_LOW); + if (IS_ERR(i2c->gpio)) { + ret = PTR_ERR(i2c->gpio); + goto e_reqirq; + } + of_property_read_u32_index(np, "clock-frequency", 0, + &i2c->algo_data.i2c_clock); } else { i2c->adap.timeout = HZ; i2c->algo_data.i2c_clock = 59000; @@ -270,11 +285,21 @@ static int i2c_pca_pf_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id i2c_pca_of_match_table[] = { + { .compatible = "nxp,pca9564" }, + { .compatible = "nxp,pca9665" }, + {}, +}; +MODULE_DEVICE_TABLE(of, i2c_pca_of_match_table); +#endif + static struct platform_driver i2c_pca_pf_driver = { .probe = i2c_pca_pf_probe, .remove = i2c_pca_pf_remove, .driver = { .name = "i2c-pca-platform", + .of_match_table = of_match_ptr(i2c_pca_of_match_table), }, }; |