diff options
| -rw-r--r-- | Documentation/devicetree/bindings/net/stmmac.txt | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac.h | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 19 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c | 4 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 4 |
6 files changed, 28 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt index eba0e5e59ebe..d132513e8fac 100644 --- a/Documentation/devicetree/bindings/net/stmmac.txt +++ b/Documentation/devicetree/bindings/net/stmmac.txt @@ -30,6 +30,9 @@ Required properties: Optional properties: - mac-address: 6 bytes, mac address +- resets: Should contain a phandle to the STMMAC reset signal, if any +- reset-names: Should contain the reset signal name "stmmaceth", if a + reset phandle is given Examples: diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 6e52c0f74cd9..b59d1ef5f6d4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -5,6 +5,7 @@ config STMMAC_ETH select PHYLIB select CRC32 select PTP_1588_CLOCK + select RESET_CONTROLLER ---help--- This is the driver for the Ethernet IPs are built around a Synopsys IP Core and only tested on the STMicroelectronics diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 73709e9ddcd1..c1c141fe15e7 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -32,6 +32,7 @@ #include <linux/pci.h> #include "common.h" #include <linux/ptp_clock_kernel.h> +#include <linux/reset.h> struct stmmac_priv { /* Frequently used values are kept adjacent for cache effect */ @@ -91,6 +92,7 @@ struct stmmac_priv { int wolopts; int wol_irq; struct clk *stmmac_clk; + struct reset_control *stmmac_rst; int clk_csr; struct timer_list eee_ctrl_timer; int lpi_irq; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 0d2c4cb0996b..0c5c1208900e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -51,6 +51,7 @@ #include <linux/net_tstamp.h> #include "stmmac_ptp.h" #include "stmmac.h" +#include <linux/reset.h> #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x) #define JUMBO_LEN 9000 @@ -2728,10 +2729,24 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device, if (IS_ERR(priv->stmmac_clk)) { dev_warn(priv->device, "%s: warning: cannot get CSR clock\n", __func__); + ret = PTR_ERR(priv->stmmac_clk); goto error_clk_get; } clk_prepare_enable(priv->stmmac_clk); + priv->stmmac_rst = devm_reset_control_get(priv->device, + STMMAC_RESOURCE_NAME); + if (IS_ERR(priv->stmmac_rst)) { + if (PTR_ERR(priv->stmmac_rst) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto error_hw_init; + } + dev_info(priv->device, "no reset control found\n"); + priv->stmmac_rst = NULL; + } + if (priv->stmmac_rst) + reset_control_deassert(priv->stmmac_rst); + /* Init MAC and get the capabilities */ ret = stmmac_hw_init(priv); if (ret) @@ -2808,7 +2823,7 @@ error_hw_init: error_clk_get: free_netdev(ndev); - return NULL; + return ERR_PTR(ret); } /** @@ -2832,6 +2847,8 @@ int stmmac_dvr_remove(struct net_device *ndev) stmmac_mdio_unregister(ndev); netif_carrier_off(ndev); unregister_netdev(ndev); + if (priv->stmmac_rst) + reset_control_assert(priv->stmmac_rst); clk_disable_unprepare(priv->stmmac_clk); free_netdev(ndev); diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c index 37ba2e080825..291608924849 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c @@ -100,9 +100,9 @@ static int stmmac_pci_probe(struct pci_dev *pdev, stmmac_default_data(); priv = stmmac_dvr_probe(&(pdev->dev), &plat_dat, addr); - if (!priv) { + if (IS_ERR(priv)) { pr_err("%s: main driver probe failed", __func__); - ret = -ENODEV; + ret = PTR_ERR(priv); goto err_out; } priv->dev->irq = pdev->irq; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 6d0bf222623a..cc6b89a75f99 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -152,9 +152,9 @@ static int stmmac_pltfr_probe(struct platform_device *pdev) } priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr); - if (!priv) { + if (IS_ERR(priv)) { pr_err("%s: main driver probe failed", __func__); - return -ENODEV; + return PTR_ERR(priv); } /* Get MAC address if available (DT) */ |