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path: root/drivers/spi/spi-cs42l43.c
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Diffstat (limited to 'drivers/spi/spi-cs42l43.c')
-rw-r--r--drivers/spi/spi-cs42l43.c192
1 files changed, 183 insertions, 9 deletions
diff --git a/drivers/spi/spi-cs42l43.c b/drivers/spi/spi-cs42l43.c
index aabef9fc84bd..b28a840b3b04 100644
--- a/drivers/spi/spi-cs42l43.c
+++ b/drivers/spi/spi-cs42l43.c
@@ -5,10 +5,16 @@
// Copyright (C) 2022-2023 Cirrus Logic, Inc. and
// Cirrus Logic International Semiconductor Ltd.
+#include <linux/acpi.h>
+#include <linux/array_size.h>
#include <linux/bits.h>
#include <linux/bitfield.h>
+#include <linux/cleanup.h>
#include <linux/device.h>
#include <linux/errno.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/machine.h>
+#include <linux/gpio/property.h>
#include <linux/mfd/cs42l43.h>
#include <linux/mfd/cs42l43-regs.h>
#include <linux/mod_devicetable.h>
@@ -16,12 +22,13 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include <linux/units.h>
#define CS42L43_FIFO_SIZE 16
-#define CS42L43_SPI_ROOT_HZ (40 * HZ_PER_MHZ)
+#define CS42L43_SPI_ROOT_HZ 49152000
#define CS42L43_SPI_MAX_LENGTH 65532
enum cs42l43_spi_cmd {
@@ -39,6 +46,26 @@ static const unsigned int cs42l43_clock_divs[] = {
2, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30
};
+static struct spi_board_info amp_info_template = {
+ .modalias = "cs35l56",
+ .max_speed_hz = 11 * HZ_PER_MHZ,
+ .mode = SPI_MODE_0,
+};
+
+static const struct software_node cs42l43_gpiochip_swnode = {
+ .name = "cs42l43-pinctrl",
+};
+
+static const struct software_node_ref_args cs42l43_cs_refs[] = {
+ SOFTWARE_NODE_REFERENCE(&cs42l43_gpiochip_swnode, 0, GPIO_ACTIVE_LOW),
+ SOFTWARE_NODE_REFERENCE(&swnode_gpio_undefined),
+};
+
+static const struct property_entry cs42l43_cs_props[] = {
+ PROPERTY_ENTRY_REF_ARRAY("cs-gpios", cs42l43_cs_refs),
+ {}
+};
+
static int cs42l43_spi_tx(struct regmap *regmap, const u8 *buf, unsigned int len)
{
const u8 *end = buf + len;
@@ -203,16 +230,113 @@ static size_t cs42l43_spi_max_length(struct spi_device *spi)
return CS42L43_SPI_MAX_LENGTH;
}
+static int cs42l43_get_speaker_id_gpios(struct cs42l43_spi *priv, int *result)
+{
+ struct gpio_descs *descs;
+ u32 spkid;
+ int i, ret;
+
+ descs = gpiod_get_array_optional(priv->dev, "spk-id", GPIOD_IN);
+ if (!descs)
+ return 0;
+ else if (IS_ERR(descs))
+ return PTR_ERR(descs);
+
+ spkid = 0;
+ for (i = 0; i < descs->ndescs; i++) {
+ ret = gpiod_get_value_cansleep(descs->desc[i]);
+ if (ret < 0)
+ goto err;
+
+ spkid |= (ret << i);
+ }
+
+ dev_dbg(priv->dev, "spk-id-gpios = %d\n", spkid);
+ *result = spkid;
+err:
+ gpiod_put_array(descs);
+
+ return ret;
+}
+
+static struct fwnode_handle *cs42l43_find_xu_node(struct fwnode_handle *fwnode)
+{
+ static const u32 func_smart_amp = 0x1;
+ struct fwnode_handle *child_fwnode, *ext_fwnode;
+ u32 function;
+ int ret;
+
+ fwnode_for_each_child_node(fwnode, child_fwnode) {
+ acpi_handle handle = ACPI_HANDLE_FWNODE(child_fwnode);
+
+ ret = acpi_get_local_address(handle, &function);
+ if (ret || function != func_smart_amp)
+ continue;
+
+ ext_fwnode = fwnode_get_named_child_node(child_fwnode,
+ "mipi-sdca-function-expansion-subproperties");
+ if (!ext_fwnode)
+ continue;
+
+ fwnode_handle_put(child_fwnode);
+
+ return ext_fwnode;
+ }
+
+ return NULL;
+}
+
+static struct spi_board_info *cs42l43_create_bridge_amp(struct cs42l43_spi *priv,
+ const char * const name,
+ int cs, int spkid)
+{
+ struct property_entry *props = NULL;
+ struct software_node *swnode;
+ struct spi_board_info *info;
+
+ if (spkid >= 0) {
+ props = devm_kmalloc(priv->dev, sizeof(*props), GFP_KERNEL);
+ if (!props)
+ return NULL;
+
+ *props = PROPERTY_ENTRY_U32("cirrus,speaker-id", spkid);
+ }
+
+ swnode = devm_kmalloc(priv->dev, sizeof(*swnode), GFP_KERNEL);
+ if (!swnode)
+ return NULL;
+
+ *swnode = SOFTWARE_NODE(name, props, NULL);
+
+ info = devm_kmemdup(priv->dev, &amp_info_template,
+ sizeof(amp_info_template), GFP_KERNEL);
+ if (!info)
+ return NULL;
+
+ info->chip_select = cs;
+ info->swnode = swnode;
+
+ return info;
+}
+
static void cs42l43_release_of_node(void *data)
{
fwnode_handle_put(data);
}
+static void cs42l43_release_sw_node(void *data)
+{
+ software_node_unregister(&cs42l43_gpiochip_swnode);
+}
+
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);
+ struct fwnode_handle *xu_fwnode __free(fwnode_handle) = cs42l43_find_xu_node(fwnode);
+ int nsidecars = 0;
+ int spkid = -EINVAL;
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
@@ -259,21 +383,70 @@ static int cs42l43_spi_probe(struct platform_device *pdev)
if (is_of_node(fwnode)) {
fwnode = fwnode_get_named_child_node(fwnode, "spi");
- ret = devm_add_action(priv->dev, cs42l43_release_of_node, fwnode);
- if (ret) {
- fwnode_handle_put(fwnode);
+ ret = devm_add_action_or_reset(priv->dev, cs42l43_release_of_node, fwnode);
+ if (ret)
return ret;
- }
}
- device_set_node(&priv->ctlr->dev, fwnode);
+ fwnode_property_read_u32(xu_fwnode, "01fa-sidecar-instances", &nsidecars);
+
+ if (nsidecars) {
+ ret = fwnode_property_read_u32(xu_fwnode, "01fa-spk-id-val", &spkid);
+ if (!ret) {
+ dev_dbg(priv->dev, "01fa-spk-id-val = %d\n", spkid);
+ } else if (ret != -EINVAL) {
+ return dev_err_probe(priv->dev, ret, "Failed to get spk-id-val\n");
+ } else {
+ ret = cs42l43_get_speaker_id_gpios(priv, &spkid);
+ if (ret < 0)
+ return dev_err_probe(priv->dev, ret,
+ "Failed to get spk-id-gpios\n");
+ }
+
+ ret = software_node_register(&cs42l43_gpiochip_swnode);
+ if (ret)
+ return dev_err_probe(priv->dev, ret,
+ "Failed to register gpio swnode\n");
+
+ ret = devm_add_action_or_reset(priv->dev, cs42l43_release_sw_node, NULL);
+ if (ret)
+ return ret;
+
+ ret = device_create_managed_software_node(&priv->ctlr->dev,
+ cs42l43_cs_props, NULL);
+ if (ret)
+ return dev_err_probe(priv->dev, ret, "Failed to add swnode\n");
+ } 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);
+ if (ret)
+ return dev_err_probe(priv->dev, ret,
+ "Failed to register SPI controller\n");
+
+ if (nsidecars) {
+ struct spi_board_info *ampl_info;
+ struct spi_board_info *ampr_info;
+
+ ampl_info = cs42l43_create_bridge_amp(priv, "cs35l56-left", 0, spkid);
+ if (!ampl_info)
+ return -ENOMEM;
+
+ ampr_info = cs42l43_create_bridge_amp(priv, "cs35l56-right", 1, spkid);
+ if (!ampr_info)
+ return -ENOMEM;
+
+ if (!spi_new_device(priv->ctlr, ampl_info))
+ return dev_err_probe(priv->dev, -ENODEV,
+ "Failed to create left amp slave\n");
+
+ if (!spi_new_device(priv->ctlr, ampr_info))
+ return dev_err_probe(priv->dev, -ENODEV,
+ "Failed to create right amp slave\n");
}
- return ret;
+ return 0;
}
static const struct platform_device_id cs42l43_spi_id_table[] = {
@@ -291,6 +464,7 @@ static struct platform_driver cs42l43_spi_driver = {
};
module_platform_driver(cs42l43_spi_driver);
+MODULE_IMPORT_NS("GPIO_SWNODE");
MODULE_DESCRIPTION("CS42L43 SPI Driver");
MODULE_AUTHOR("Lucas Tanure <tanureal@opensource.cirrus.com>");
MODULE_AUTHOR("Maciej Strozek <mstrozek@opensource.cirrus.com>");
generated by cgit (git 2.34.1) at 2025-07-23 08:48:58 +0000