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Message-Id: <1422473586-18100-2-git-send-email-tony@atomide.com>
Date: Wed, 28 Jan 2015 11:33:04 -0800
From: Tony Lindgren <tony@...mide.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-omap@...r.kernel.org,
Brian Hutchinson <b.hutchman@...il.com>,
Felipe Balbi <balbi@...com>
Subject: [PATCH 1/3] net: cpsw: Add a minimal cpsw-common module for shared code
Looks like davinci_emac and cpsw can share some code although the
device registers have a different layout.
At least the code for getting the MAC address using syscon can
be shared by passing the register offset. Let's start with that
and set up a minimal shared cpsw-shared.c.
Cc: Brian Hutchinson <b.hutchman@...il.com>
Cc: Felipe Balbi <balbi@...com>
Signed-off-by: Tony Lindgren <tony@...mide.com>
---
drivers/net/ethernet/ti/Makefile | 3 ++
drivers/net/ethernet/ti/cpsw-common.c | 53 +++++++++++++++++++++++++++++++++++
drivers/net/ethernet/ti/cpsw.c | 35 ++---------------------
drivers/net/ethernet/ti/cpsw.h | 2 ++
4 files changed, 60 insertions(+), 33 deletions(-)
create mode 100644 drivers/net/ethernet/ti/cpsw-common.c
diff --git a/drivers/net/ethernet/ti/Makefile b/drivers/net/ethernet/ti/Makefile
index 465d03d..7fa47f6 100644
--- a/drivers/net/ethernet/ti/Makefile
+++ b/drivers/net/ethernet/ti/Makefile
@@ -2,6 +2,9 @@
# Makefile for the TI network device drivers.
#
+obj-$(CONFIG_TI_CPSW) += cpsw-common.o
+obj-$(CONFIG_TI_DAVINCI_EMAC) += cpsw-common.o
+
obj-$(CONFIG_TLAN) += tlan.o
obj-$(CONFIG_CPMAC) += cpmac.o
obj-$(CONFIG_TI_DAVINCI_EMAC) += davinci_emac.o
diff --git a/drivers/net/ethernet/ti/cpsw-common.c b/drivers/net/ethernet/ti/cpsw-common.c
new file mode 100644
index 0000000..763ada1
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw-common.c
@@ -0,0 +1,53 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#define AM33XX_CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
+#define AM33XX_CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
+
+int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
+ u8 *mac_addr)
+{
+ u32 macid_lo;
+ u32 macid_hi;
+ struct regmap *syscon;
+
+ syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+ if (IS_ERR(syscon)) {
+ if (PTR_ERR(syscon) == -ENODEV)
+ return 0;
+ return PTR_ERR(syscon);
+ }
+
+ regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(offset, slave),
+ &macid_lo);
+ regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(offset, slave),
+ &macid_hi);
+
+ mac_addr[5] = (macid_lo >> 8) & 0xff;
+ mac_addr[4] = macid_lo & 0xff;
+ mac_addr[3] = (macid_hi >> 24) & 0xff;
+ mac_addr[2] = (macid_hi >> 16) & 0xff;
+ mac_addr[1] = (macid_hi >> 8) & 0xff;
+ mac_addr[0] = macid_hi & 0xff;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpsw_am33xx_cm_get_macid);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 2b9d404..7d8dd0d 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -33,8 +33,6 @@
#include <linux/of_net.h>
#include <linux/of_device.h>
#include <linux/if_vlan.h>
-#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
#include <linux/pinctrl/consumer.h>
@@ -1936,36 +1934,6 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
slave->port_vlan = data->dual_emac_res_vlan;
}
-#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id)
-#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4)
-
-static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave,
- u8 *mac_addr)
-{
- u32 macid_lo;
- u32 macid_hi;
- struct regmap *syscon;
-
- syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
- if (IS_ERR(syscon)) {
- if (PTR_ERR(syscon) == -ENODEV)
- return 0;
- return PTR_ERR(syscon);
- }
-
- regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo);
- regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi);
-
- mac_addr[5] = (macid_lo >> 8) & 0xff;
- mac_addr[4] = macid_lo & 0xff;
- mac_addr[3] = (macid_hi >> 24) & 0xff;
- mac_addr[2] = (macid_hi >> 16) & 0xff;
- mac_addr[1] = (macid_hi >> 8) & 0xff;
- mac_addr[0] = macid_hi & 0xff;
-
- return 0;
-}
-
static int cpsw_probe_dt(struct cpsw_platform_data *data,
struct platform_device *pdev)
{
@@ -2090,7 +2058,8 @@ no_phy_slave:
memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
} else {
if (of_machine_is_compatible("ti,am33xx")) {
- ret = cpsw_am33xx_cm_get_macid(&pdev->dev, i,
+ ret = cpsw_am33xx_cm_get_macid(&pdev->dev,
+ 0x630, i,
slave_data->mac_addr);
if (ret)
return ret;
diff --git a/drivers/net/ethernet/ti/cpsw.h b/drivers/net/ethernet/ti/cpsw.h
index 1b71067..ca90efa 100644
--- a/drivers/net/ethernet/ti/cpsw.h
+++ b/drivers/net/ethernet/ti/cpsw.h
@@ -41,5 +41,7 @@ struct cpsw_platform_data {
};
void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave);
+int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
+ u8 *mac_addr);
#endif /* __CPSW_H__ */
--
2.1.4
--
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