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aports/testing/linux-asahi/apple-pwm.patch
Milan P. Stanić 92eb94dad3 testing/linux-asahi: upgrade to asahi 6.1-rc2 tag 1 release 
add keyboard backlight and sensors patch
add m1n1 to depends
2022-10-29 19:04:19 +00:00

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From aee4d8e15eff4ef006b5ff65195b32a86c652e5b Mon Sep 17 00:00:00 2001
From: anchorage <7d578vix8hzw@opayq.net>
Date: Fri, 7 Oct 2022 22:39:54 +0300
Subject: [PATCH] pwm: Add new pwm driver for ARM Macs
Arm macs have a PWM controller that is hooked up to the keyboard backlight.
This patch adds the controller driver and device tree bindings using pwm-leds.
---
.../devicetree/bindings/pwm/pwm-apple.yaml | 41 +++++
arch/arm64/boot/dts/apple/t600x-die0.dtsi | 9 ++
.../arm64/boot/dts/apple/t600x-j314-j316.dtsi | 18 +++
arch/arm64/boot/dts/apple/t8103-j293.dts | 16 ++
arch/arm64/boot/dts/apple/t8103-j313.dts | 16 ++
arch/arm64/boot/dts/apple/t8103.dtsi | 10 ++
arch/arm64/boot/dts/apple/t8112-j413.dts | 16 ++
arch/arm64/boot/dts/apple/t8112-j493.dts | 16 ++
arch/arm64/boot/dts/apple/t8112.dtsi | 11 ++
drivers/pwm/Kconfig | 12 ++
drivers/pwm/Makefile | 1 +
drivers/pwm/pwm-apple.c | 141 ++++++++++++++++++
12 files changed, 307 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/pwm-apple.yaml
create mode 100644 drivers/pwm/pwm-apple.c
diff --git a/Documentation/devicetree/bindings/pwm/pwm-apple.yaml b/Documentation/devicetree/bindings/pwm/pwm-apple.yaml
new file mode 100644
index 00000000000000..fd751acec4eb98
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-apple.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/pwm-apple.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple FPWM controller
+
+maintainers: []
+
+description: |+
+ PWM controller used for keyboard backlight on ARM Macs
+
+properties:
+ compatible:
+ const: apple,s5l-fpwm
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ "#pwm-cells":
+ const: 2
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ fpwm1: fpwm@235044000 {
+ compatible = "apple,s5l-fpwm";
+ reg = <0x2 0x35044000 0x0 0x4000>;
+ power-domains = <&ps_fpwm1>;
+ clocks = <&clkref>;
+ #pwm-cells = <2>;
+ status = "disabled";
+ };
diff --git a/arch/arm64/boot/dts/apple/t600x-die0.dtsi b/arch/arm64/boot/dts/apple/t600x-die0.dtsi
index 4c203778aa891e..715fff34ad936a 100644
--- a/arch/arm64/boot/dts/apple/t600x-die0.dtsi
+++ b/arch/arm64/boot/dts/apple/t600x-die0.dtsi
@@ -274,6 +274,15 @@
status = "disabled";
};
+ fpwm0: fpwm@39b030000 {
+ compatible = "apple,s5l-fpwm";
+ reg = <0x3 0x9b030000 0x0 0x4000>;
+ power-domains = <&ps_fpwm0>;
+ clocks = <&clkref>;
+ #pwm-cells = <2>;
+ status = "disabled";
+ };
+
serial0: serial@39b200000 {
compatible = "apple,s5l-uart";
reg = <0x3 0x9b200000 0x0 0x1000>;
diff --git a/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi b/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi
index bbe66ea64f0910..9a79091a2e0d5f 100644
--- a/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi
+++ b/arch/arm64/boot/dts/apple/t600x-j314-j316.dtsi
@@ -9,6 +9,8 @@
* Copyright The Asahi Linux Contributors
*/
+#include <dt-bindings/leds/common.h>
+
/ {
aliases {
serial0 = &serial0;
@@ -339,4 +341,20 @@
};
};
};
+ pwmleds {
+ compatible = "pwm-leds";
+ kbd-backlight {
+ pwms = <&fpwm0 0 40000>;
+ label = "kbd_backlight";
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ max-brightness = <255>;
+ default-state = "keep";
+ pwm-names = "kbd-backlight";
+ };
+ };
+};
+
+&fpwm0 {
+ status = "okay";
};
diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts
index 3a5ae54f0b9f7b..6237ce42793930 100644
--- a/arch/arm64/boot/dts/apple/t8103-j293.dts
+++ b/arch/arm64/boot/dts/apple/t8103-j293.dts
@@ -171,8 +171,24 @@
};
};
};
+ pwmleds {
+ compatible = "pwm-leds";
+ kbd-backlight {
+ pwms = <&fpwm1 0 40000>;
+ label = "kbd_backlight";
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ max-brightness = <255>;
+ default-state = "keep";
+ pwm-names = "kbd-backlight";
+ };
+ };
};
&framebuffer0 {
backlight = <&backlight>;
};
+
+&fpwm1 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8103-j313.dts b/arch/arm64/boot/dts/apple/t8103-j313.dts
index b51f651d23263c..94d55f0afd83d6 100644
--- a/arch/arm64/boot/dts/apple/t8103-j313.dts
+++ b/arch/arm64/boot/dts/apple/t8103-j313.dts
@@ -148,8 +148,24 @@
};
};
};
+ pwmleds {
+ compatible = "pwm-leds";
+ kbd-backlight {
+ pwms = <&fpwm1 0 40000>;
+ label = "kbd_backlight";
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ max-brightness = <255>;
+ default-state = "keep";
+ pwm-names = "kbd-backlight";
+ };
+ };
};
&framebuffer0 {
backlight = <&backlight>;
};
+
+&fpwm1 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
index afb0688cb1c2f9..b9fee327361e31 100644
--- a/arch/arm64/boot/dts/apple/t8103.dtsi
+++ b/arch/arm64/boot/dts/apple/t8103.dtsi
@@ -12,6 +12,7 @@
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/apple.h>
#include <dt-bindings/spmi/spmi.h>
+#include <dt-bindings/leds/common.h>
/ {
compatible = "apple,t8103", "apple,arm-platform";
@@ -396,6 +397,15 @@
status = "disabled"; /* only used in J293/J313 */
};
+ fpwm1: fpwm@235044000 {
+ compatible = "apple,s5l-fpwm";
+ reg = <0x2 0x35044000 0x0 0x4000>;
+ power-domains = <&ps_fpwm1>;
+ clocks = <&clkref>;
+ #pwm-cells = <2>;
+ status = "disabled";
+ };
+
serial0: serial@235200000 {
compatible = "apple,s5l-uart";
reg = <0x2 0x35200000 0x0 0x1000>;
diff --git a/arch/arm64/boot/dts/apple/t8112-j413.dts b/arch/arm64/boot/dts/apple/t8112-j413.dts
index 0d4306a39fe8f6..7709c66ed850c1 100644
--- a/arch/arm64/boot/dts/apple/t8112-j413.dts
+++ b/arch/arm64/boot/dts/apple/t8112-j413.dts
@@ -169,6 +169,18 @@
};
#endif
};
+ pwmleds {
+ compatible = "pwm-leds";
+ kbd-backlight {
+ pwms = <&fpwm1 0 40000>;
+ label = "kbd_backlight";
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ max-brightness = <255>;
+ default-state = "keep";
+ pwm-names = "kbd-backlight";
+ };
+ };
};
&framebuffer0 {
@@ -180,3 +192,7 @@
firmware-name = "apple/tpmtfw-j413.bin";
};
};
+
+&fpwm1 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8112-j493.dts b/arch/arm64/boot/dts/apple/t8112-j493.dts
index aa8c045cd1aced..92b75c3c325aa9 100644
--- a/arch/arm64/boot/dts/apple/t8112-j493.dts
+++ b/arch/arm64/boot/dts/apple/t8112-j493.dts
@@ -158,6 +158,18 @@
};
#endif
};
+ pwmleds {
+ compatible = "pwm-leds";
+ kbd-backlight {
+ pwms = <&fpwm1 0 40000>;
+ label = "kbd_backlight";
+ function = LED_FUNCTION_KBD_BACKLIGHT;
+ color = <LED_COLOR_ID_WHITE>;
+ max-brightness = <255>;
+ default-state = "keep";
+ pwm-names = "kbd-backlight";
+ };
+ };
};
&framebuffer0 {
@@ -169,3 +181,7 @@
firmware-name = "apple/tpmtfw-j493.bin";
};
};
+
+&fpwm1 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/apple/t8112.dtsi b/arch/arm64/boot/dts/apple/t8112.dtsi
index 852937ec80ea18..dda491f3d3298b 100644
--- a/arch/arm64/boot/dts/apple/t8112.dtsi
+++ b/arch/arm64/boot/dts/apple/t8112.dtsi
@@ -12,6 +12,7 @@
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/pinctrl/apple.h>
#include <dt-bindings/spmi/spmi.h>
+#include <dt-bindings/leds/common.h>
/ {
compatible = "apple,t8112", "apple,arm-platform";
@@ -416,6 +417,16 @@
status = "disabled";
};
+ fpwm1: fpwm@235044000 {
+ compatible = "apple,s5l-fpwm";
+ reg = <0x2 0x35044000 0x0 0x4000>;
+ power-domains = <&ps_fpwm1>;
+ clocks = <&clkref>;
+ #pwm-cells = <2>;
+ status = "disabled";
+ };
+
+
serial0: serial@235200000 {
compatible = "apple,s5l-uart";
reg = <0x2 0x35200000 0x0 0x1000>;
diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig
index 904de8d61828a6..3ffb5654916171 100644
--- a/drivers/pwm/Kconfig
+++ b/drivers/pwm/Kconfig
@@ -51,6 +51,18 @@ config PWM_AB8500
To compile this driver as a module, choose M here: the module
will be called pwm-ab8500.
+config PWM_APPLE
+ tristate "Apple SoC PWM support"
+ depends on ARCH_APPLE || COMPILE_TEST
+ help
+ Generic PWM framework driver for PWM controller present on
+ Apple SoCs
+
+ Say Y here if you have an ARM Apple laptop, otherwise say N
+
+ To compile this driver as a module, choose M here: the module
+ will be called pwm-apple.
+
config PWM_ATMEL
tristate "Atmel PWM support"
depends on ARCH_AT91 || COMPILE_TEST
diff --git a/drivers/pwm/Makefile b/drivers/pwm/Makefile
index 5c08bdb817b4c5..bf0c04ce704e7a 100644
--- a/drivers/pwm/Makefile
+++ b/drivers/pwm/Makefile
@@ -2,6 +2,7 @@
obj-$(CONFIG_PWM) += core.o
obj-$(CONFIG_PWM_SYSFS) += sysfs.o
obj-$(CONFIG_PWM_AB8500) += pwm-ab8500.o
+obj-$(CONFIG_PWM_APPLE) += pwm-apple.o
obj-$(CONFIG_PWM_ATMEL) += pwm-atmel.o
obj-$(CONFIG_PWM_ATMEL_HLCDC_PWM) += pwm-atmel-hlcdc.o
obj-$(CONFIG_PWM_ATMEL_TCB) += pwm-atmel-tcb.o
diff --git a/drivers/pwm/pwm-apple.c b/drivers/pwm/pwm-apple.c
new file mode 100644
index 00000000000000..3e8f2ddb05c045
--- /dev/null
+++ b/drivers/pwm/pwm-apple.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Apple SoC PWM controller
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
+
+#define PWM_CONTROL 0x00
+#define PWM_APPLY_MAGIC 0x4239
+#define PWM_ON_CYCLES 0x1c
+#define PWM_OFF_CYCLES 0x18
+
+#define CTRL_ENABLE BIT(0)
+#define CTRL_MODE BIT(2)
+#define CTRL_UPDATE BIT(5)
+#define CTRL_TRIGGER BIT(9)
+#define CTRL_INVERT BIT(10)
+#define CTRL_OUTPUT_ENABLE BIT(14)
+
+struct apple_pwm {
+ struct pwm_chip chip;
+ void __iomem *base;
+ struct clk *clk;
+ u64 clkrate;
+};
+
+static int apple_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ const struct pwm_state *state)
+{
+ struct apple_pwm *fpwm;
+ u64 on_cycles, off_cycles;
+
+ fpwm = container_of(chip, struct apple_pwm, chip);
+ on_cycles = fpwm->clkrate * state->duty_cycle / NSEC_PER_SEC;
+ off_cycles = (fpwm->clkrate * state->period / NSEC_PER_SEC) - on_cycles;
+ if (state->enabled) {
+ writel(on_cycles, fpwm->base + PWM_ON_CYCLES);
+ writel(off_cycles, fpwm->base + PWM_OFF_CYCLES);
+ writel(CTRL_ENABLE | CTRL_OUTPUT_ENABLE | CTRL_UPDATE,
+ fpwm->base + PWM_CONTROL);
+ } else {
+ writel(0, fpwm->base + PWM_CONTROL);
+ }
+ return 0;
+}
+
+static void apple_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
+ struct pwm_state *state)
+{
+ struct apple_pwm *fpwm;
+ u32 on_cycles, off_cycles, ctrl;
+
+ fpwm = container_of(chip, struct apple_pwm, chip);
+
+ ctrl = readl(fpwm->base + PWM_CONTROL);
+ on_cycles = readl(fpwm->base + PWM_ON_CYCLES);
+ off_cycles = readl(fpwm->base + PWM_OFF_CYCLES);
+
+ state->enabled = (ctrl & CTRL_ENABLE) && (ctrl & CTRL_OUTPUT_ENABLE);
+ state->polarity = PWM_POLARITY_NORMAL;
+ state->duty_cycle = on_cycles / fpwm->clkrate * NSEC_PER_SEC;
+ state->period = (off_cycles / fpwm->clkrate * NSEC_PER_SEC)
+ + state->duty_cycle;
+}
+
+static const struct pwm_ops apple_pwm_ops = {
+ .apply = apple_pwm_apply,
+ .get_state = apple_pwm_get_state,
+ .owner = THIS_MODULE,
+};
+
+static void apple_pwm_clk_disable_unprepare(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+static int apple_pwm_probe(struct platform_device *pdev)
+{
+ struct apple_pwm *pwm;
+ int ret;
+
+ pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
+ if (!pwm)
+ return -ENOMEM;
+
+ pwm->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pwm->base))
+ return PTR_ERR(pwm->base);
+
+ platform_set_drvdata(pdev, pwm);
+
+ pwm->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(pwm->clk))
+ return PTR_ERR(pwm->clk);
+
+ ret = clk_prepare_enable(pwm->clk);
+ if (ret)
+ return ret;
+
+ pwm->clkrate = clk_get_rate(pwm->clk);
+
+ ret = devm_add_action_or_reset(&pdev->dev,
+ apple_pwm_clk_disable_unprepare, pwm->clk);
+ if (ret)
+ return ret;
+
+ pwm->chip.dev = &pdev->dev;
+ pwm->chip.npwm = 1;
+ pwm->chip.ops = &apple_pwm_ops;
+
+ ret = devm_pwmchip_add(&pdev->dev, &pwm->chip);
+ return ret;
+}
+
+static const struct of_device_id apple_pwm_of_match[] = {
+ { .compatible = "apple,s5l-fpwm" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, apple_pwm_of_match);
+
+static struct platform_driver apple_pwm_driver = {
+ .probe = apple_pwm_probe,
+ .driver = {
+ .name = "apple-pwm",
+ .owner = THIS_MODULE,
+ .of_match_table = apple_pwm_of_match,
+ },
+};
+module_platform_driver(apple_pwm_driver);
+
+MODULE_DESCRIPTION("Apple SoC PWM driver");
+MODULE_LICENSE("GPL");
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