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authorGrygorii Strashko <grygorii.strashko@ti.com>2020-08-28 23:19:43 +0300
committerVinod Koul <vkoul@kernel.org>2020-09-08 13:23:10 +0300
commit7f78322cdd67c7b01b0f0723b140a04ad8fcec7b (patch)
tree8e1e4e10b66bb075a6ab0ea07e1fc5a5026c3b83 /drivers/phy/ti
parentd3fa20b97c779e1dfd341e65a3b84eb1ad650ae7 (diff)
downloadlinux-7f78322cdd67c7b01b0f0723b140a04ad8fcec7b.tar.xz
phy: ti: gmii-sel: retrieve ports number and base offset from dt
On K3 AM654x/J721E platforms the Port MII mode selection register(s) have similar format and placed in the System Control Module (SCM) module sequentially as one register per port, but, depending SOC and CPSW instance, the base offset and number of ports can be different. Hence, add possibility to retrieve number of ports and base registers offset from DT and support for max possible number of ports supported by K3 SoCs like J721E. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Link: https://lore.kernel.org/r/20200828201943.29155-4-grygorii.strashko@ti.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy/ti')
-rw-r--r--drivers/phy/ti/phy-gmii-sel.c44
1 files changed, 33 insertions, 11 deletions
diff --git a/drivers/phy/ti/phy-gmii-sel.c b/drivers/phy/ti/phy-gmii-sel.c
index a6b7f22e85c4..5fd2e8a08bfc 100644
--- a/drivers/phy/ti/phy-gmii-sel.c
+++ b/drivers/phy/ti/phy-gmii-sel.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/phy/phy.h>
@@ -41,6 +42,7 @@ struct phy_gmii_sel_soc_data {
u32 num_ports;
u32 features;
const struct reg_field (*regfields)[PHY_GMII_SEL_LAST];
+ bool use_of_data;
};
struct phy_gmii_sel_priv {
@@ -49,6 +51,8 @@ struct phy_gmii_sel_priv {
struct regmap *regmap;
struct phy_provider *phy_provider;
struct phy_gmii_sel_phy_priv *if_phys;
+ u32 num_ports;
+ u32 reg_offset;
};
static int phy_gmii_sel_mode(struct phy *phy, enum phy_mode mode, int submode)
@@ -168,14 +172,19 @@ struct phy_gmii_sel_soc_data phy_gmii_sel_soc_dm814 = {
static const
struct reg_field phy_gmii_sel_fields_am654[][PHY_GMII_SEL_LAST] = {
- {
- [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x4040, 0, 1),
- },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x0, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x4, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x8, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0xC, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x10, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x14, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x18, 0, 2), },
+ { [PHY_GMII_SEL_PORT_MODE] = REG_FIELD(0x1C, 0, 2), },
};
static const
struct phy_gmii_sel_soc_data phy_gmii_sel_soc_am654 = {
- .num_ports = 1,
+ .use_of_data = true,
.regfields = phy_gmii_sel_fields_am654,
};
@@ -222,7 +231,7 @@ static struct phy *phy_gmii_sel_of_xlate(struct device *dev,
if (priv->soc_data->features & BIT(PHY_GMII_SEL_RMII_IO_CLK_EN) &&
args->args_count < 2)
return ERR_PTR(-EINVAL);
- if (phy_id > priv->soc_data->num_ports)
+ if (phy_id > priv->num_ports)
return ERR_PTR(-EINVAL);
if (phy_id != priv->if_phys[phy_id - 1].id)
return ERR_PTR(-EINVAL);
@@ -251,6 +260,7 @@ static int phy_gmii_init_phy(struct phy_gmii_sel_priv *priv, int port,
fields = soc_data->regfields[port - 1];
field = *fields++;
+ field.reg += priv->reg_offset;
dev_dbg(dev, "%s field %x %d %d\n", __func__,
field.reg, field.msb, field.lsb);
@@ -260,6 +270,7 @@ static int phy_gmii_init_phy(struct phy_gmii_sel_priv *priv, int port,
if_phy->fields[PHY_GMII_SEL_PORT_MODE] = regfield;
field = *fields++;
+ field.reg += priv->reg_offset;
if (soc_data->features & BIT(PHY_GMII_SEL_RGMII_ID_MODE)) {
regfield = devm_regmap_field_alloc(dev,
priv->regmap,
@@ -272,6 +283,7 @@ static int phy_gmii_init_phy(struct phy_gmii_sel_priv *priv, int port,
}
field = *fields;
+ field.reg += priv->reg_offset;
if (soc_data->features & BIT(PHY_GMII_SEL_RMII_IO_CLK_EN)) {
regfield = devm_regmap_field_alloc(dev,
priv->regmap,
@@ -299,19 +311,28 @@ static int phy_gmii_init_phy(struct phy_gmii_sel_priv *priv, int port,
static int phy_gmii_sel_init_ports(struct phy_gmii_sel_priv *priv)
{
const struct phy_gmii_sel_soc_data *soc_data = priv->soc_data;
- struct device *dev = priv->dev;
struct phy_gmii_sel_phy_priv *if_phys;
- int i, num_ports, ret;
+ struct device *dev = priv->dev;
+ int i, ret;
+
+ if (soc_data->use_of_data) {
+ const __be32 *offset;
+ u64 size;
- num_ports = soc_data->num_ports;
+ offset = of_get_address(dev->of_node, 0, &size, NULL);
+ priv->num_ports = size / sizeof(u32);
+ if (!priv->num_ports)
+ return -EINVAL;
+ priv->reg_offset = __be32_to_cpu(*offset);
+ }
- if_phys = devm_kcalloc(priv->dev, num_ports,
+ if_phys = devm_kcalloc(dev, priv->num_ports,
sizeof(*if_phys), GFP_KERNEL);
if (!if_phys)
return -ENOMEM;
- dev_dbg(dev, "%s %d\n", __func__, num_ports);
+ dev_dbg(dev, "%s %d\n", __func__, priv->num_ports);
- for (i = 0; i < num_ports; i++) {
+ for (i = 0; i < priv->num_ports; i++) {
ret = phy_gmii_init_phy(priv, i + 1, &if_phys[i]);
if (ret)
return ret;
@@ -339,6 +360,7 @@ static int phy_gmii_sel_probe(struct platform_device *pdev)
priv->dev = &pdev->dev;
priv->soc_data = of_id->data;
+ priv->num_ports = priv->soc_data->num_ports;
priv->regmap = syscon_node_to_regmap(node->parent);
if (IS_ERR(priv->regmap)) {