diff options
Diffstat (limited to 'drivers/spi/spi-cs42l43.c')
| -rw-r--r-- | drivers/spi/spi-cs42l43.c | 127 |
1 files changed, 119 insertions, 8 deletions
diff --git a/drivers/spi/spi-cs42l43.c b/drivers/spi/spi-cs42l43.c index aabef9fc84bd..9d747ea69926 100644 --- a/drivers/spi/spi-cs42l43.c +++ b/drivers/spi/spi-cs42l43.c @@ -5,10 +5,14 @@ // 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/device.h> #include <linux/errno.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> @@ -16,6 +20,7 @@ #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> @@ -39,6 +44,44 @@ 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 = 20 * HZ_PER_MHZ, + .chip_select = 0, + .mode = SPI_MODE_0, + .swnode = &l, +}; + +static struct spi_board_info ampr_info = { + .modalias = "cs35l56", + .max_speed_hz = 20 * HZ_PER_MHZ, + .chip_select = 1, + .mode = SPI_MODE_0, + .swnode = &r, +}; + +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 +246,59 @@ static size_t cs42l43_spi_max_length(struct spi_device *spi) return CS42L43_SPI_MAX_LENGTH; } +static bool cs42l43_has_sidecar(struct fwnode_handle *fwnode) +{ + static const u32 func_smart_amp = 0x1; + struct fwnode_handle *child_fwnode, *ext_fwnode; + unsigned int val; + 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; + + ret = fwnode_property_read_u32(ext_fwnode, + "01fa-sidecar-instances", + &val); + + fwnode_handle_put(ext_fwnode); + + if (ret) + continue; + + fwnode_handle_put(child_fwnode); + + return !!val; + } + + return false; +} + 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); + bool has_sidecar = cs42l43_has_sidecar(fwnode); int ret; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); @@ -259,21 +345,45 @@ 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); + if (has_sidecar) { + 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 (has_sidecar) { + if (!spi_new_device(priv->ctlr, &l_info)) + return dev_err_probe(priv->dev, -ENODEV, + "Failed to create left amp slave\n"); + + if (!spi_new_device(priv->ctlr, &r_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 +401,7 @@ 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 <[email protected]>"); MODULE_AUTHOR("Maciej Strozek <[email protected]>"); |