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Subject[net-next: PATCH 8/8] net: mvpp2: enable ACPI support in the driver
Date
This patch introduces an alternative way of obtaining resources - via
ACPI tables provided by firmware. Enabling coexistence with the DT
support, in addition to the OF_*->device_*/fwnode_* API replacement,
required following steps to be taken:

* Add mvpp2_acpi_match table
* Omit clock configuration and obtain tclk from the property - in ACPI
world, the firmware is responsible for clock maintenance.
* Disable comphy and syscon handling as they are not available for ACPI.
* Modify way of obtaining interrupts - with ACPI they are resources
bound to struct platform_device and it's not possible to obtain
them directly from the child node. Hence a formula is used, depending
on the port_id and number of possible CPUs.

Moreover when booting with ACPI MVPP2_QDIST_MULTI_MODE is picked by
default, as there is no need to keep any kind of the backward
compatibility.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
---
drivers/net/ethernet/marvell/mvpp2.c | 130 +++++++++++++-------
1 file changed, 87 insertions(+), 43 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2.c b/drivers/net/ethernet/marvell/mvpp2.c
index 4e61ce7..762a44e 100644
--- a/drivers/net/ethernet/marvell/mvpp2.c
+++ b/drivers/net/ethernet/marvell/mvpp2.c
@@ -10,6 +10,7 @@
* warranty of any kind, whether express or implied.
*/

+#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
@@ -7477,7 +7478,8 @@ static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port,
return 0;
}

-static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port,
+static int mvpp2_multi_queue_vectors_init(struct platform_device *pdev,
+ struct mvpp2_port *port,
struct device_node *port_node)
{
struct mvpp2_queue_vector *v;
@@ -7510,7 +7512,11 @@ static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port,
strncpy(irqname, "rx-shared", sizeof(irqname));
}

- v->irq = of_irq_get_byname(port_node, irqname);
+ if (port_node)
+ v->irq = of_irq_get_byname(port_node, irqname);
+ else
+ v->irq = platform_get_irq(pdev, port->id *
+ (port->nqvecs + 2) + i);
if (v->irq <= 0) {
ret = -EINVAL;
goto err;
@@ -7528,11 +7534,12 @@ static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port,
return ret;
}

-static int mvpp2_queue_vectors_init(struct mvpp2_port *port,
+static int mvpp2_queue_vectors_init(struct platform_device *pdev,
+ struct mvpp2_port *port,
struct device_node *port_node)
{
if (port->has_tx_irqs)
- return mvpp2_multi_queue_vectors_init(port, port_node);
+ return mvpp2_multi_queue_vectors_init(pdev, port, port_node);
else
return mvpp2_simple_queue_vectors_init(port, port_node);
}
@@ -7753,7 +7760,7 @@ static int mvpp2_port_probe(struct platform_device *pdev,
struct fwnode_handle *port_fwnode,
struct mvpp2 *priv)
{
- struct phy *comphy;
+ struct phy *comphy = NULL;
struct mvpp2_port *port;
struct mvpp2_port_pcpu *port_pcpu;
struct device_node *port_node = to_of_node(port_fwnode);
@@ -7772,7 +7779,12 @@ static int mvpp2_port_probe(struct platform_device *pdev,
if (!fwnode_device_is_available(port_fwnode))
return 0;

- has_tx_irqs = mvpp2_port_has_tx_irqs(priv, port_node);
+ if (port_node) {
+ has_tx_irqs = mvpp2_port_has_tx_irqs(priv, port_node);
+ } else {
+ has_tx_irqs = true;
+ queue_mode = MVPP2_QDIST_MULTI_MODE;
+ }

if (!has_tx_irqs)
queue_mode = MVPP2_QDIST_SINGLE_MODE;
@@ -7794,13 +7806,15 @@ static int mvpp2_port_probe(struct platform_device *pdev,
goto err_free_netdev;
}

- comphy = devm_of_phy_get(&pdev->dev, port_node, NULL);
- if (IS_ERR(comphy)) {
- if (PTR_ERR(comphy) == -EPROBE_DEFER) {
- err = -EPROBE_DEFER;
- goto err_free_netdev;
+ if (port_node) {
+ comphy = devm_of_phy_get(&pdev->dev, port_node, NULL);
+ if (IS_ERR(comphy)) {
+ if (PTR_ERR(comphy) == -EPROBE_DEFER) {
+ err = -EPROBE_DEFER;
+ goto err_free_netdev;
+ }
+ comphy = NULL;
}
- comphy = NULL;
}

if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) {
@@ -7820,6 +7834,7 @@ static int mvpp2_port_probe(struct platform_device *pdev,
port->nrxqs = nrxqs;
port->priv = priv;
port->has_tx_irqs = has_tx_irqs;
+ port->id = id;

err = fwnode_property_get_reference_args(port_fwnode, "phy", NULL,
0, 0, &args);
@@ -7832,11 +7847,16 @@ static int mvpp2_port_probe(struct platform_device *pdev,
goto err_free_netdev;
}

- err = mvpp2_queue_vectors_init(port, port_node);
+ err = mvpp2_queue_vectors_init(pdev, port, port_node);
if (err)
goto err_free_netdev;

- port->link_irq = of_irq_get_byname(port_node, "link");
+ if (port_node)
+ port->link_irq = of_irq_get_byname(port_node, "link");
+ else
+ port->link_irq = platform_get_irq(pdev, port->id *
+ (port->nqvecs + 2) +
+ port->nqvecs + 1);
if (port->link_irq == -EPROBE_DEFER) {
err = -EPROBE_DEFER;
goto err_deinit_qvecs;
@@ -7848,7 +7868,6 @@ static int mvpp2_port_probe(struct platform_device *pdev,
if (fwnode_property_read_bool(port_fwnode, "marvell,loopback"))
port->flags |= MVPP2_F_LOOPBACK;

- port->id = id;
if (priv->hw_version == MVPP21)
port->first_rxq = port->id * port->nrxqs;
else
@@ -8218,6 +8237,7 @@ static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv)

static int mvpp2_probe(struct platform_device *pdev)
{
+ const struct acpi_device_id *acpi_id;
struct fwnode_handle *port_fwnode;
struct mvpp2 *priv;
struct resource *res;
@@ -8229,8 +8249,14 @@ static int mvpp2_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;

- priv->hw_version =
- (unsigned long)of_device_get_match_data(&pdev->dev);
+ if (has_acpi_companion(&pdev->dev)) {
+ acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table,
+ &pdev->dev);
+ priv->hw_version = (unsigned long)acpi_id->driver_data;
+ } else {
+ priv->hw_version =
+ (unsigned long)of_device_get_match_data(&pdev->dev);
+ }

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
@@ -8247,7 +8273,9 @@ static int mvpp2_probe(struct platform_device *pdev)
priv->iface_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->iface_base))
return PTR_ERR(priv->iface_base);
+ }

+ if (priv->hw_version == MVPP22 && dev_of_node(&pdev->dev)) {
priv->sysctrl_base =
syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
"marvell,system-controller");
@@ -8273,32 +8301,34 @@ static int mvpp2_probe(struct platform_device *pdev)
else
priv->max_port_rxqs = 32;

- priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk");
- if (IS_ERR(priv->pp_clk))
- return PTR_ERR(priv->pp_clk);
- err = clk_prepare_enable(priv->pp_clk);
- if (err < 0)
- return err;
-
- priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk");
- if (IS_ERR(priv->gop_clk)) {
- err = PTR_ERR(priv->gop_clk);
- goto err_pp_clk;
- }
- err = clk_prepare_enable(priv->gop_clk);
- if (err < 0)
- goto err_pp_clk;
+ if (dev_of_node(&pdev->dev)) {
+ priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk");
+ if (IS_ERR(priv->pp_clk))
+ return PTR_ERR(priv->pp_clk);
+ err = clk_prepare_enable(priv->pp_clk);
+ if (err < 0)
+ return err;

- if (priv->hw_version == MVPP22) {
- priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk");
- if (IS_ERR(priv->mg_clk)) {
- err = PTR_ERR(priv->mg_clk);
- goto err_gop_clk;
+ priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk");
+ if (IS_ERR(priv->gop_clk)) {
+ err = PTR_ERR(priv->gop_clk);
+ goto err_pp_clk;
}
-
- err = clk_prepare_enable(priv->mg_clk);
+ err = clk_prepare_enable(priv->gop_clk);
if (err < 0)
- goto err_gop_clk;
+ goto err_pp_clk;
+
+ if (priv->hw_version == MVPP22) {
+ priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk");
+ if (IS_ERR(priv->mg_clk)) {
+ err = PTR_ERR(priv->mg_clk);
+ goto err_gop_clk;
+ }
+
+ err = clk_prepare_enable(priv->mg_clk);
+ if (err < 0)
+ goto err_gop_clk;
+ }

priv->axi_clk = devm_clk_get(&pdev->dev, "axi_clk");
if (IS_ERR(priv->axi_clk)) {
@@ -8311,10 +8341,14 @@ static int mvpp2_probe(struct platform_device *pdev)
if (err < 0)
goto err_gop_clk;
}
- }

- /* Get system's tclk rate */
- priv->tclk = clk_get_rate(priv->pp_clk);
+ /* Get system's tclk rate */
+ priv->tclk = clk_get_rate(priv->pp_clk);
+ } else if (device_property_read_u32(&pdev->dev, "clock-frequency",
+ &priv->tclk)) {
+ dev_err(&pdev->dev, "missing clock-frequency value\n");
+ return -EINVAL;
+ }

if (priv->hw_version == MVPP22) {
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
@@ -8418,6 +8452,9 @@ static int mvpp2_remove(struct platform_device *pdev)
aggr_txq->descs_dma);
}

+ if (is_acpi_node(port_fwnode))
+ return 0;
+
clk_disable_unprepare(priv->axi_clk);
clk_disable_unprepare(priv->mg_clk);
clk_disable_unprepare(priv->pp_clk);
@@ -8439,12 +8476,19 @@ static const struct of_device_id mvpp2_match[] = {
};
MODULE_DEVICE_TABLE(of, mvpp2_match);

+static const struct acpi_device_id mvpp2_acpi_match[] = {
+ { "MRVL0110", MVPP22 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match);
+
static struct platform_driver mvpp2_driver = {
.probe = mvpp2_probe,
.remove = mvpp2_remove,
.driver = {
.name = MVPP2_DRIVER_NAME,
.of_match_table = mvpp2_match,
+ .acpi_match_table = ACPI_PTR(mvpp2_acpi_match),
},
};

--
2.7.4
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