src/drivers/i2c/sx9324/sx9324.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpi_device.h>
   4 #include <acpi/acpigen.h>
   5 #include <console/console.h>
   6 #include <device/i2c_simple.h>
   7 #include <device/device.h>
   8 #include <stdio.h>
   9
  10 #include "chip.h"
  11
  12 #define I2C_SX9324_ACPI_ID      "STH9324"
  13 #define I2C_SX9324_CHIP_NAME    "Semtech SX9324"
  14
  15 #define REGISTER(NAME) acpi_dp_add_integer(dsd, \
  16                                         I2C_SX9324_ACPI_ID "," #NAME, \
  17                                         config->NAME)
  18
  19 static void i2c_sx9324_fill_ssdt(const struct device *dev)
  20 {
  21         struct drivers_i2c_sx9324_config *config = dev->chip_info;
  22         const char *scope = acpi_device_scope(dev);
  23         struct acpi_i2c i2c = {
  24                 .address = dev->path.i2c.device,
  25                 .mode_10bit = dev->path.i2c.mode_10bit,
  26                 .speed = I2C_SPEED_FAST,
  27                 .resource = scope,
  28         };
  29         struct acpi_dp *dsd;
  30
  31         if (!scope || !config)
  32                 return;
  33
  34         if (config->speed)
  35                 i2c.speed = config->speed;
  36
  37         /* Device */
  38         acpigen_write_scope(scope);
  39         acpigen_write_device(acpi_device_name(dev));
  40         acpigen_write_name_string("_HID", I2C_SX9324_ACPI_ID);
  41         acpigen_write_name_integer("_UID", config->uid);
  42         acpigen_write_name_string("_DDN", config->desc);
  43         acpigen_write_STA(acpi_device_status(dev));
  44
  45         /* Resources */
  46         acpigen_write_name("_CRS");
  47         acpigen_write_resourcetemplate_header();
  48         acpi_device_write_i2c(&i2c);
  49
  50         if (config->irq_gpio.pin_count)
  51                 acpi_device_write_gpio(&config->irq_gpio);
  52         else
  53                 acpi_device_write_interrupt(&config->irq);
  54
  55         acpigen_write_resourcetemplate_footer();
  56
  57         /* DSD */
  58         dsd = acpi_dp_new_table("_DSD");
  59         acpi_dp_add_integer_array(dsd, "semtech,ph0-pin", config->ph0_pin, ARRAY_SIZE(config->ph0_pin));
  60         acpi_dp_add_integer_array(dsd, "semtech,ph1-pin", config->ph1_pin, ARRAY_SIZE(config->ph1_pin));
  61         acpi_dp_add_integer_array(dsd, "semtech,ph2-pin", config->ph2_pin, ARRAY_SIZE(config->ph2_pin));
  62         acpi_dp_add_integer_array(dsd, "semtech,ph3-pin", config->ph3_pin, ARRAY_SIZE(config->ph3_pin));
  63         acpi_dp_add_integer(dsd, "semtech,ph01-resolution", config->ph01_resolution);
  64         acpi_dp_add_integer(dsd, "semtech,ph23-resolution", config->ph23_resolution);
  65         acpi_dp_add_integer(dsd, "semtech,startup-sensor", config->startup_sensor);
  66         acpi_dp_add_integer(dsd, "semtech,ph01-proxraw-strength", config->ph01_proxraw_strength);
  67         acpi_dp_add_integer(dsd, "semtech,ph23-proxraw-strength", config->ph23_proxraw_strength);
  68         acpi_dp_add_integer(dsd, "semtech,avg-pos-strength", config->avg_pos_strength);
  69         acpi_dp_add_integer(dsd, "semtech,input-precharge-resistor-ohms", config->input_precharge_resistor_ohms);
  70         acpi_dp_add_integer(dsd, "semtech,input-analog-gain", config->input_analog_gain);
  71         acpi_dp_add_string(dsd, "semtech,cs-idle-sleep", config->cs_idle_sleep);
  72         acpi_dp_add_string(dsd, "semtech,int-comp-resistor", config->int_comp_resistor);
  73 #if CONFIG(DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER)
  74 #include "registers.h"
  75 #endif
  76         acpi_dp_write(dsd);
  77
  78         acpigen_pop_len(); /* Device */
  79         acpigen_pop_len(); /* Scope */
  80
  81         printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
  82                config->desc ? : dev->chip_ops->name, dev_path(dev));
  83 }
  84
  85 #undef REGISTER
  86
  87 static const char *i2c_sx9324_acpi_name(const struct device *dev)
  88 {
  89         static char name[5];
  90
  91         snprintf(name, sizeof(name), "SX%02.2X", dev->path.i2c.device);
  92         return name;
  93 }
  94
  95 static struct device_operations i2c_sx9324_ops = {
  96         .read_resources         = noop_read_resources,
  97         .set_resources          = noop_set_resources,
  98         .acpi_name              = i2c_sx9324_acpi_name,
  99         .acpi_fill_ssdt         = i2c_sx9324_fill_ssdt,
 100 };
 101
 102 static void i2c_sx9324_enable(struct device *dev)
 103 {
 104         struct drivers_i2c_sx9324_config *config = dev->chip_info;
 105
 106         if (!config) {
 107                 dev->enabled = 0;
 108                 return;
 109         }
 110
 111         dev->ops = &i2c_sx9324_ops;
 112
 113         if (config->desc)
 114                 dev->name = config->desc;
 115 }
 116
 117 struct chip_operations drivers_i2c_sx9324_ops = {
 118         .name = I2C_SX9324_CHIP_NAME,
 119         .enable_dev = i2c_sx9324_enable
 120 };