diff options
Diffstat (limited to 'util/pinmap/pm/generate.go')
| -rw-r--r-- | util/pinmap/pm/generate.go | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/util/pinmap/pm/generate.go b/util/pinmap/pm/generate.go new file mode 100644 index 0000000000..0548a4a4db --- /dev/null +++ b/util/pinmap/pm/generate.go @@ -0,0 +1,172 @@ +// Copyright 2021 The Chromium OS Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +package pm + +import ( + "fmt" + "io" + "sort" + "strings" + "time" +) + +const header = `/* Copyright %d The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * This file is auto-generated - do not edit! + */ + +/ { +` + +// Generate creates the DTS configuration from the pins using the chip as a +// reference and writes the DTS to the output. +func Generate(out io.Writer, pins *Pins, chip Chip) { + // Write header with date. + fmt.Fprintf(out, header, time.Now().Year()) + pinConfig(out, "named-adc-channels", pins.Adc, chip, adcConfig) + pinConfig(out, "named-gpios", pins.Gpio, chip, gpioConfig) + pinConfig(out, "named-i2c-ports", pins.I2c, chip, i2cConfig) + pinConfig(out, "named-pwms", pins.Pwm, chip, pwmConfig) + fmt.Fprintf(out, "};\n") + // Retrieve the enabled nodes, sort, de-dup and + // generate overlays. + en := chip.EnabledNodes() + if len(en) != 0 { + sort.Strings(en) + var prev string + for _, s := range en { + if s == prev { + continue + } + fmt.Fprintf(out, "\n&%s {\n", s) + fmt.Fprintf(out, "\tstatus = \"okay\";\n") + fmt.Fprintf(out, "};\n") + prev = s + } + } +} + +// pinConfig creates the DTS for a single pin. +func pinConfig(out io.Writer, block string, pins []*Pin, chip Chip, cfunc func(io.Writer, *Pin, Chip)) { + if len(pins) == 0 { + return + } + // Sort the pins into alphbetical order. + sort.Slice(pins, func(i, j int) bool { + return pins[j].Signal > pins[i].Signal + }) + // Generate start of block. + fmt.Fprintf(out, "\n\t%s {\n", block) + fmt.Fprintf(out, "\t\tcompatible = \"%s\";\n\n", block) + for _, p := range pins { + cfunc(out, p, chip) + } + fmt.Fprintf(out, "\t};\n") +} + +// adcConfig is the handler for ADC pins. +func adcConfig(out io.Writer, pin *Pin, chip Chip) { + if pin.PinType != ADC { + fmt.Printf("Unknown ADC type (%d) for pin %s, ignored\n", pin.PinType, pin.Pin) + return + } + c := chip.Adc(pin.Pin) + if len(c) == 0 { + fmt.Printf("No matching ADC for pin %s, ignored\n", pin.Pin) + return + } + lc := strings.ToLower(pin.Signal) + fmt.Fprintf(out, "\t\tadc_%s: %s {\n", lc, lc) + fmt.Fprintf(out, "\t\t\tlabel = \"%s\";\n", pin.Signal) + if len(pin.Enum) > 0 { + fmt.Fprintf(out, "\t\t\tenum-name = \"%s\";\n", pin.Enum) + } + fmt.Fprintf(out, "\t\t\tchannel = <%s>;\n", c) + fmt.Fprintf(out, "\t\t};\n") +} + +// gpioConfig is the handler for GPIO pins. +func gpioConfig(out io.Writer, pin *Pin, chip Chip) { + c := chip.Gpio(pin.Pin) + if len(c) == 0 { + fmt.Printf("No matching GPIO for pin %s, ignored\n", pin.Pin) + return + } + var gtype string + switch pin.PinType { + default: + fmt.Printf("Unknown GPIO type (%d) for pin %s, ignored\n", pin.PinType, pin.Pin) + return + case Input: + gtype = "GPIO_INPUT" + case InputPU: + gtype = "GPIO_INPUT_PULL_UP" + case InputPD: + gtype = "GPIO_INPUT_PULL_DOWN" + case Output: + gtype = "GPIO_OUTPUT" + case OutputOD: + gtype = "GPIO_ODR_HIGH" + case OutputODL: + gtype = "GPIO_ODR_LOW" + } + lc := strings.ToLower(pin.Signal) + fmt.Fprintf(out, "\t\tgpio_%s: %s {\n", lc, lc) + fmt.Fprintf(out, "\t\t\t#gpio-cells = <0>;\n") + fmt.Fprintf(out, "\t\t\tgpios = <&%s %s>;\n", c, gtype) + if len(pin.Enum) > 0 { + fmt.Fprintf(out, "\t\t\tenum-name = \"%s\";\n", pin.Enum) + } + fmt.Fprintf(out, "\t\t};\n") +} + +// i2cConfig is the handler for I2C pins. +func i2cConfig(out io.Writer, pin *Pin, chip Chip) { + if pin.PinType != I2C { + fmt.Printf("Unknown I2C type (%d) for pin %s, ignored\n", pin.PinType, pin.Pin) + return + } + c := chip.I2c(pin.Pin) + if len(c) == 0 { + fmt.Printf("No matching I2C for pin %s, ignored\n", pin.Pin) + return + } + // Trim off trailing clock name (if any) + lc := strings.TrimRight(strings.ToLower(pin.Signal), "_scl") + fmt.Fprintf(out, "\t\ti2c_%s: %s {\n", lc, lc) + fmt.Fprintf(out, "\t\t\ti2c-port = <&%s>;\n", c) + if len(pin.Enum) > 0 { + fmt.Fprintf(out, "\t\t\tenum-name = \"%s\";\n", pin.Enum) + } + fmt.Fprintf(out, "\t\t};\n") +} + +// pwmConfig is the handler for PWM pins. +func pwmConfig(out io.Writer, pin *Pin, chip Chip) { + var inv string + switch pin.PinType { + default: + fmt.Printf("Unknown PWM type (%d) for pin %s, ignored\n", pin.PinType, pin.Pin) + return + case PWM: + inv = "0" + case PWM_INVERT: + inv = "1" + } + c := chip.Pwm(pin.Pin) + if len(c) == 0 { + fmt.Printf("No matching PWM for pin %s, ignored\n", pin.Pin) + return + } + lc := strings.ToLower(pin.Signal) + fmt.Fprintf(out, "\t\tpwm_%s: %s {\n", lc, lc) + fmt.Fprintf(out, "\t\t\tpwms = <&%s %s>;\n", c, inv) + if len(pin.Enum) > 0 { + fmt.Fprintf(out, "\t\t\tenum-name = \"%s\";\n", pin.Enum) + } + fmt.Fprintf(out, "\t\t};\n") +} |