diff options
Diffstat (limited to 'meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0108-can-mcp251x-add-reset-gpio-support.patch')
| -rw-r--r-- | meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0108-can-mcp251x-add-reset-gpio-support.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0108-can-mcp251x-add-reset-gpio-support.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0108-can-mcp251x-add-reset-gpio-support.patch new file mode 100644 index 0000000..646aa0c --- /dev/null +++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0108-can-mcp251x-add-reset-gpio-support.patch @@ -0,0 +1,72 @@ +From b69e3fdc91fbc88cc32eb6794872e1f058681b04 Mon Sep 17 00:00:00 2001 +From: Andrey Gusakov <andrey.gusakov@cogentembedded.com> +Date: Mon, 26 Mar 2018 13:51:49 +0300 +Subject: [PATCH] can: mcp251x: add reset gpio support + +Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com> +--- + drivers/net/can/spi/mcp251x.c | 17 +++++++++++++++++ + 1 file changed, 17 insertions(+) + +diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c +index f3f05fe..ac78ce3 100644 +--- a/drivers/net/can/spi/mcp251x.c ++++ b/drivers/net/can/spi/mcp251x.c +@@ -71,6 +71,7 @@ + #include <linux/netdevice.h> + #include <linux/of.h> + #include <linux/of_device.h> ++#include <linux/of_gpio.h> + #include <linux/platform_device.h> + #include <linux/slab.h> + #include <linux/spi/spi.h> +@@ -270,6 +271,7 @@ struct mcp251x_priv { + struct regulator *power; + struct regulator *transceiver; + struct clk *clk; ++ struct gpio_desc *rst; + }; + + #define MCP251X_IS(_model) \ +@@ -1031,9 +1033,21 @@ static int mcp251x_can_probe(struct spi_device *spi) + struct mcp251x_platform_data *pdata = dev_get_platdata(&spi->dev); + struct net_device *net; + struct mcp251x_priv *priv; ++ struct gpio_desc *reset_gpio; + struct clk *clk; + int freq, ret; + ++ reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH); ++ if (IS_ERR(reset_gpio)) { ++ if (PTR_ERR(reset_gpio) == -EPROBE_DEFER) ++ return -EPROBE_DEFER; ++ dev_err(&spi->dev, "cannot get reset-gpios %ld\n", ++ PTR_ERR(reset_gpio)); ++ reset_gpio = NULL; ++ } else { ++ gpiod_set_value_cansleep(reset_gpio, 1); ++ } ++ + clk = devm_clk_get(&spi->dev, NULL); + if (IS_ERR(clk)) { + if (pdata) +@@ -1074,6 +1088,7 @@ static int mcp251x_can_probe(struct spi_device *spi) + priv->model = spi_get_device_id(spi)->driver_data; + priv->net = net; + priv->clk = clk; ++ priv->rst = reset_gpio; + + spi_set_drvdata(spi, priv); + +@@ -1185,6 +1200,8 @@ static int mcp251x_can_remove(struct spi_device *spi) + + mcp251x_power_enable(priv->power, 0); + ++ gpiod_set_value_cansleep(priv->rst, 0); ++ + if (!IS_ERR(priv->clk)) + clk_disable_unprepare(priv->clk); + +-- +1.9.1 + |