@@ -5,6 +5,8 @@
// Copyright (C) 2022-2023 Cirrus Logic, Inc. and
// Cirrus Logic International Semiconductor Ltd.
+#include <dt-bindings/gpio/gpio.h>
+#include <linux/acpi.h>
#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/device.h>
@@ -39,6 +41,59 @@ static const unsigned int cs42l43_clock_divs[] = {
2, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30
};
+static const struct software_node ampl = {
+ .name = "cs35l56-left",
+};
+
+static const struct software_node ampr = {
+ .name = "cs35l56-right",
+};
+
+static struct spi_board_info ampl_info = {
+ .modalias = "cs35l56",
+ .max_speed_hz = 2000000,
+ .chip_select = 0,
+ .mode = SPI_MODE_0,
+ .swnode = &l,
+ .use_fwnode_name = true,
+};
+
+static struct spi_board_info ampr_info = {
+ .modalias = "cs35l56",
+ .max_speed_hz = 2000000,
+ .chip_select = 1,
+ .mode = SPI_MODE_0,
+ .swnode = &r,
+ .use_fwnode_name = true,
+};
+
+static const struct software_node cs42l43_gpiochip_swnode = {
+ .name = "cs42l43-pinctrl",
+};
+
+static const struct software_node_ref_args cs42l43_cs_refs[] = {
+ {
+ .node = &cs42l43_gpiochip_swnode,
+ .nargs = 2,
+ .args = { 0, GPIO_ACTIVE_LOW },
+ },
+ {
+ .node = &swnode_gpio_undefined,
+ .nargs = 0,
+ },
+};
+
+static const struct property_entry cs42l43_cs_props[] = {
+ {
+ .name = "cs-gpios",
+ .length = ARRAY_SIZE(cs42l43_cs_refs) *
+ sizeof(struct software_node_ref_args),
+ .type = DEV_PROP_REF,
+ .pointer = cs42l43_cs_refs,
+ },
+ {}
+};
+
static int cs42l43_spi_tx(struct regmap *regmap, const u8 *buf, unsigned int len)
{
const u8 *end = buf + len;
@@ -203,6 +258,51 @@ static size_t cs42l43_spi_max_length(struct spi_device *spi)
return CS42L43_SPI_MAX_LENGTH;
}
+#if IS_ENABLED(CONFIG_ACPI)
+static bool cs42l43_has_sidecar(struct fwnode_handle *fwnode)
+{
+ static const int func_smart_amp = 0x1;
+ struct fwnode_handle *child_fwnode, *ext_fwnode;
+ unsigned long long function;
+ unsigned int val;
+ int ret;
+
+ if (!is_acpi_node(fwnode))
+ return false;
+
+ fwnode_for_each_child_node(fwnode, child_fwnode) {
+ struct acpi_device *adev = to_acpi_device_node(child_fwnode);
+
+ ret = acpi_evaluate_integer(adev->handle, "_ADR", NULL, &function);
+ if (ACPI_FAILURE(ret))
+ continue;
+
+ if (function != func_smart_amp)
+ continue;
+
+ ext_fwnode = fwnode_get_named_child_node(child_fwnode,
+ "mipi-sdca-function-expansion-subproperties");
+ if (!ext_fwnode)
+ continue;
+
+ ret = fwnode_property_read_u32(ext_fwnode,
+ "01fa-cirrus-sidecar-instances",
+ &val);
+ if (ret)
+ continue;
+
+ return !!val;
+ }
+
+ return false;
+}
+#else
+static bool cs42l43_has_sidecar(struct fwnode_handle *fwnode)
+{
+ return false;
+}
+#endif
+
static void cs42l43_release_of_node(void *data)
{
fwnode_handle_put(data);
@@ -213,6 +313,7 @@ static int cs42l43_spi_probe(struct platform_device *pdev)
struct cs42l43 *cs42l43 = dev_get_drvdata(pdev->dev.parent);
struct cs42l43_spi *priv;
struct fwnode_handle *fwnode = dev_fwnode(cs42l43->dev);
+ bool has_sidecar = cs42l43_has_sidecar(fwnode);
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
@@ -266,16 +367,64 @@ static int cs42l43_spi_probe(struct platform_device *pdev)
}
}
- device_set_node(&priv->ctlr->dev, fwnode);
+ if (has_sidecar) {
+ ret = software_node_register(&cs42l43_gpiochip_swnode);
+ if (ret) {
+ dev_err(priv->dev, "Failed to register gpio swnode: %d\n", ret);
+ return ret;
+ }
+
+ ret = device_create_managed_software_node(&priv->ctlr->dev, cs42l43_cs_props, NULL);
+ if (ret) {
+ dev_err(priv->dev, "Failed to add swnode: %d\n", ret);
+ goto err;
+ }
+
+ } else {
+ device_set_node(&priv->ctlr->dev, fwnode);
+ }
ret = devm_spi_register_controller(priv->dev, priv->ctlr);
if (ret) {
dev_err(priv->dev, "Failed to register SPI controller: %d\n", ret);
+ goto err;
}
+ if (has_sidecar) {
+ if (!spi_new_device(priv->ctlr, &l_info)) {
+ ret = -ENODEV;
+ dev_err(priv->dev, "Failed to create left amp slave\n");
+ goto err;
+ }
+
+ if (!spi_new_device(priv->ctlr, &r_info)) {
+ ret = -ENODEV;
+ dev_err(priv->dev, "Failed to create right amp slave\n");
+ goto err;
+ }
+ }
+
+ return 0;
+
+err:
+ if (has_sidecar)
+ software_node_unregister(&cs42l43_gpiochip_swnode);
+
return ret;
}
+static int cs42l43_spi_remove(struct platform_device *pdev)
+{
+ struct cs42l43 *cs42l43 = dev_get_drvdata(pdev->dev.parent);
+ struct fwnode_handle *fwnode = dev_fwnode(cs42l43->dev);
+ bool has_sidecar = cs42l43_has_sidecar(fwnode);
+
+ if (has_sidecar)
+ software_node_unregister(&cs42l43_gpiochip_swnode);
+
+ return 0;
+};
+
static const struct platform_device_id cs42l43_spi_id_table[] = {
{ "cs42l43-spi", },
{}
@@ -288,6 +437,7 @@ static struct platform_driver cs42l43_spi_driver = {
},
.probe = cs42l43_spi_probe,
.id_table = cs42l43_spi_id_table,
+ .remove = cs42l43_spi_remove,
};
module_platform_driver(cs42l43_spi_driver);