From: Piyush Malgujar <pmalgujar@xxxxxxxxxxx>
These changes enables to read the configs from ACPI tables as required
for successful probing in ACPI uefi environment.
In case of ACPI disabled/dts based environment, it will continue to
read configs from dts as before
Signed-off-by: Piyush Malgujar <pmalgujar@xxxxxxxxxxx>
Signed-off-by: Witold Sadowski <wsadowski@xxxxxxxxxxx>
---
drivers/spi/spi-cadence-xspi.c | 84 +++++++++++++++++++++++++++++++---
1 file changed, 77 insertions(+), 7 deletions(-)
diff --git a/drivers/spi/spi-cadence-xspi.c b/drivers/spi/spi-cadence-xspi.c
index 4bfcfa2f8835..f6bae59b34e5 100644
--- a/drivers/spi/spi-cadence-xspi.c
+++ b/drivers/spi/spi-cadence-xspi.c
@@ -2,6 +2,7 @@
// Cadence XSPI flash controller driver
// Copyright (C) 2020-21 Cadence
+#include <linux/acpi.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/err.h>
@@ -14,6 +15,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/property.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
#include <linux/bitfield.h>
@@ -647,6 +649,67 @@ static int cdns_xspi_mem_op(struct cdns_xspi_dev *cdns_xspi,
(dir != SPI_MEM_NO_DATA));
}
+#ifdef CONFIG_ACPI
+static bool cdns_xspi_supports_op(struct spi_mem *mem,
+ const struct spi_mem_op *op)
+{
+ struct spi_device *spi = mem->spi;
+ const union acpi_object *obj;
+ struct acpi_device *adev;
+
+ adev = ACPI_COMPANION(&spi->dev);
+
+ if (!acpi_dev_get_property(adev, "spi-tx-bus-width", ACPI_TYPE_INTEGER,
+ &obj)) {
+ switch (obj->integer.value) {
+ case 1:
+ break;
+ case 2:
+ spi->mode |= SPI_TX_DUAL;
+ break;
+ case 4:
+ spi->mode |= SPI_TX_QUAD;
+ break;
+ case 8:
+ spi->mode |= SPI_TX_OCTAL;
+ break;
+ default:
+ dev_warn(&spi->dev,
+ "spi-tx-bus-width %lld not supported\n",
+ obj->integer.value);
+ break;
+ }
+ }
+
+ if (!acpi_dev_get_property(adev, "spi-rx-bus-width", ACPI_TYPE_INTEGER,
+ &obj)) {
+ switch (obj->integer.value) {
+ case 1:
+ break;
+ case 2:
+ spi->mode |= SPI_RX_DUAL;
+ break;
+ case 4:
+ spi->mode |= SPI_RX_QUAD;
+ break;
+ case 8:
+ spi->mode |= SPI_RX_OCTAL;
+ break;
+ default:
+ dev_warn(&spi->dev,
+ "spi-rx-bus-width %lld not supported\n",
+ obj->integer.value);
+ break;
+ }
+ }
+
+ if (!spi_mem_default_supports_op(mem, op))
+ return false;
+
+ return true;
+}
+#endif
+
static int cdns_xspi_mem_op_execute(struct spi_mem *mem,
const struct spi_mem_op *op)
{
@@ -670,6 +733,9 @@ static int cdns_xspi_adjust_mem_op_size(struct spi_mem *mem, struct spi_mem_op *
}
static const struct spi_controller_mem_ops cadence_xspi_mem_ops = {
+#ifdef CONFIG_ACPI
+ .supports_op = cdns_xspi_supports_op,
+#endif
.exec_op = cdns_xspi_mem_op_execute,
.adjust_op_size = cdns_xspi_adjust_mem_op_size,
};
@@ -721,21 +787,20 @@ static irqreturn_t cdns_xspi_irq_handler(int this_irq, void *dev)
static int cdns_xspi_of_get_plat_data(struct platform_device *pdev)
{
- struct device_node *node_prop = pdev->dev.of_node;
- struct device_node *node_child;
+ struct fwnode_handle *fwnode_child;
unsigned int cs;
- for_each_child_of_node(node_prop, node_child) {
- if (!of_device_is_available(node_child))
+ device_for_each_child_node(&pdev->dev, fwnode_child) {
+ if (!fwnode_device_is_available(fwnode_child))
continue;
- if (of_property_read_u32(node_child, "reg", &cs)) {
+ if (fwnode_property_read_u32(fwnode_child, "reg", &cs)) {
dev_err(&pdev->dev, "Couldn't get memory chip select\n");
- of_node_put(node_child);
+ fwnode_handle_put(fwnode_child);
return -ENXIO;
} else if (cs >= CDNS_XSPI_MAX_BANKS) {
dev_err(&pdev->dev, "reg (cs) parameter value too large\n");
- of_node_put(node_child);
+ fwnode_handle_put(fwnode_child);
return -ENXIO;
}
}
@@ -789,6 +854,11 @@ static int cdns_xspi_probe(struct platform_device *pdev)
SPI_MODE_0 | SPI_MODE_3;
drv_data = of_device_get_match_data(dev);
+ if (!drv_data) {
+ drv_data = acpi_device_get_match_data(dev);
+ if (!drv_data)
+ return -ENODEV;
+ }
host->mem_ops = &cadence_xspi_mem_ops;
host->dev.of_node = pdev->dev.of_node;
--
2.43.0
