From: Ansuel Smith <ansuelsmth@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org (open list:ETHERNET PHY LIBRARY),
linux-kernel@vger.kernel.org (open list)
Cc: Ansuel Smith <ansuelsmth@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>
Subject: [RFC PATCH net-next 2/3] net: mdio: ipq8064: add regmap config to disable REGCACHE
Date: Tue, 11 May 2021 04:11:09 +0200 [thread overview]
Message-ID: <20210511021110.17522-2-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20210511021110.17522-1-ansuelsmth@gmail.com>
mdio drivers should not use REGCHACHE. Also disable locking since it's
handled by the mdio users and regmap is always accessed atomically.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
drivers/net/mdio/mdio-ipq8064.c | 34 +++++++++++++++++++++++----------
1 file changed, 24 insertions(+), 10 deletions(-)
diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
index f776a843a63b..14b3c310af73 100644
--- a/drivers/net/mdio/mdio-ipq8064.c
+++ b/drivers/net/mdio/mdio-ipq8064.c
@@ -7,10 +7,9 @@
#include <linux/delay.h>
#include <linux/kernel.h>
-#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
-#include <linux/phy.h>
+#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
@@ -97,14 +96,34 @@ ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data)
return ipq8064_mdio_wait_busy(priv);
}
+static const struct regmap_config ipq8064_mdio_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+ .can_multi_write = false,
+ /* the mdio lock is used by any user of this mdio driver */
+ .disable_locking = true,
+
+ .cache_type = REGCACHE_NONE,
+};
+
static int
ipq8064_mdio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct ipq8064_mdio *priv;
+ struct resource res;
struct mii_bus *bus;
+ void __iomem *base;
int ret;
+ if (of_address_to_resource(np, 0, &res))
+ return -ENOMEM;
+
+ base = ioremap(res.start, resource_size(&res));
+ if (!base)
+ return -ENOMEM;
+
bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*priv));
if (!bus)
return -ENOMEM;
@@ -116,15 +135,10 @@ ipq8064_mdio_probe(struct platform_device *pdev)
bus->parent = &pdev->dev;
priv = bus->priv;
- priv->base = device_node_to_regmap(np);
- if (IS_ERR(priv->base)) {
- if (priv->base == ERR_PTR(-EPROBE_DEFER))
- return -EPROBE_DEFER;
-
- dev_err(&pdev->dev, "error getting device regmap, error=%pe\n",
- priv->base);
+ priv->base = devm_regmap_init_mmio(&pdev->dev, base,
+ &ipq8064_mdio_regmap_config);
+ if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
- }
ret = of_mdiobus_register(bus, np);
if (ret)
--
2.30.2
next prev parent reply other threads:[~2021-05-11 2:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 2:11 [RFC PATCH net-next 1/3] net: mdio: ipq8064: clean whitespaces in define Ansuel Smith
2021-05-11 2:11 ` Ansuel Smith [this message]
2021-05-11 2:11 ` [RFC PATCH net-next 3/3] net: mdio: ipq8064: enlarge sleep after read/write operation Ansuel Smith
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