[RFC PATCH net-next v2 1/3] sh_eth: add support for gpio reset
From: Simon Horman <hidden>
Date: 2013-05-14 02:37:51
Also in:
linux-sh
Subsystem:
networking drivers, renesas superh ethernet driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Niklas Söderlund, Linus Torvalds
Allow reset using a GPIO. In order to use this set the following in the device's platform data: needs_gpio_reset = 1 reset_gpio = GPIO pin to use This patch is motivated by the lager board which uses the r8a7790 SoC which has a GPIO pin to reset its sh_eth device. Signed-off-by: Simon Horman <redacted> -- v2 * First post --- drivers/net/ethernet/renesas/sh_eth.c | 4 ++++ include/linux/sh_eth.h | 3 +++ 2 files changed, 7 insertions(+)
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 33dc6f2..016cf80 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c@@ -21,6 +21,7 @@ * the file called "COPYING". */ +#include <linux/gpio.h> #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h>
@@ -2759,6 +2760,9 @@ static int sh_eth_drv_probe(struct platform_device *pdev) ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER; } + if (pd->needs_gpio_reset) + gpio_request_one(pd->reset_gpio, GPIOF_OUT_INIT_HIGH, NULL); + /* initialize first or needed device */ if (!devno || pd->needs_init) { if (mdp->cd->chip_reset)
diff --git a/include/linux/sh_eth.h b/include/linux/sh_eth.h
index fc30571..b3f1550 100644
--- a/include/linux/sh_eth.h
+++ b/include/linux/sh_eth.h@@ -22,6 +22,9 @@ struct sh_eth_plat_data { unsigned no_ether_link:1; unsigned ether_link_active_low:1; unsigned needs_init:1; + unsigned needs_gpio_reset:1; + + unsigned reset_gpio; /* Used if needs_gpio_reset is true */ }; #endif
--
1.8.2.1