At the moment, the only additional setup required for the DWMAC
on the IMG Pistachio SoC is to request and enable a separate gate
clock for the register interface.
Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx>
Signed-off-by: Govindraj Raja <govindraj.raja@xxxxxxxxxx>
Cc: James Hartley <james.hartley@xxxxxxxxxx>
---
Changes from v1:
- Do not potentially assign an error pointer to pdata->sys_clk
---
drivers/net/ethernet/stmicro/stmmac/Makefile | 3 +-
.../net/ethernet/stmicro/stmmac/dwmac-pistachio.c | 59 ++++++++++++++++++++++
.../net/ethernet/stmicro/stmmac/stmmac_platform.c | 1 +
.../net/ethernet/stmicro/stmmac/stmmac_platform.h | 1 +
4 files changed, 63 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-pistachio.c
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 73c2715..8efb622 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -6,7 +6,8 @@ stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o ring_mode.o \
obj-$(CONFIG_STMMAC_PLATFORM) += stmmac-platform.o
stmmac-platform-objs:= stmmac_platform.o dwmac-meson.o dwmac-sunxi.o \
- dwmac-sti.o dwmac-socfpga.o dwmac-rk.o
+ dwmac-sti.o dwmac-socfpga.o dwmac-rk.o \
+ dwmac-pistachio.o
obj-$(CONFIG_STMMAC_PCI) += stmmac-pci.o
stmmac-pci-objs:= stmmac_pci.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-pistachio.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-pistachio.c
new file mode 100644
index 0000000..5e0b958
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-pistachio.c
@@ -0,0 +1,59 @@
+/*
+ * IMG Pistachio DWMAC glue layer
+ *
+ * Copyright (C) 2015 Google, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/stmmac.h>
+
+struct pistachio_dwmac_priv_data {
+ struct clk *sys_clk;
+};
+
+static void *pistachio_dwmac_setup(struct platform_device *pdev)
+{
+ struct pistachio_dwmac_priv_data *pdata;
+ struct clk *clk;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ clk = devm_clk_get(&pdev->dev, "sys");
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "Failed to get sys clock: %ld\n",
+ PTR_ERR(clk));
+ return clk;
+ }
+ pdata->sys_clk = clk;
+
+ return pdata;
+}
+
+static int pistachio_dwmac_init(struct platform_device *pdev, void *priv)
+{
+ struct pistachio_dwmac_priv_data *pdata = priv;
+
+ return clk_prepare_enable(pdata->sys_clk);
+}
+
+static void pistachio_dwmac_exit(struct platform_device *pdev, void *priv)
+{
+ struct pistachio_dwmac_priv_data *pdata = priv;
+
+ clk_disable_unprepare(pdata->sys_clk);
+}
+
+const struct stmmac_of_data pistachio_dwmac_data = {
+ .setup = pistachio_dwmac_setup,
+ .init = pistachio_dwmac_init,
+ .exit = pistachio_dwmac_exit,
+ .has_gmac = true,
+};
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index f9b42f1..d5de361 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -34,6 +34,7 @@
static const struct of_device_id stmmac_dt_ids[] = {
/* SoC specific glue layers should come before generic bindings */
{ .compatible = "rockchip,rk3288-gmac", .data = &rk3288_gmac_data},
+ { .compatible = "img,pistachio-dwmac", .data = &pistachio_dwmac_data},
{ .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
{ .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
{ .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
index 093eb99..101e635 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
@@ -25,5 +25,6 @@ extern const struct stmmac_of_data stih4xx_dwmac_data;
extern const struct stmmac_of_data stid127_dwmac_data;
extern const struct stmmac_of_data socfpga_gmac_data;
extern const struct stmmac_of_data rk3288_gmac_data;
+extern const struct stmmac_of_data pistachio_dwmac_data;
#endif /* __STMMAC_PLATFORM_H__ */
--
2.2.0.rc0.207.ga3a616c
--
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