[PATCH linux v1] drivers: hwmon: Support for ASPEED PWM/Fan tach
Jaghathiswari Rankappagounder Natarajan
jaghu at google.com
Sat Feb 11 05:01:06 AEDT 2017
Signed-off-by: Jaghathiswari Rankappagounder Natarajan <jaghu at google.com>
---
.../devicetree/bindings/hwmon/aspeed-pwm-tacho.txt | 178 ++++
Documentation/hwmon/aspeed-pwm-tacho | 22 +
arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts | 73 ++
arch/arm/boot/dts/aspeed-g5.dtsi | 6 +
drivers/hwmon/Kconfig | 11 +-
drivers/hwmon/Makefile | 1 +
drivers/hwmon/aspeed-pwm-tacho.c | 895 +++++++++++++++++++++
7 files changed, 1185 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
create mode 100644 Documentation/hwmon/aspeed-pwm-tacho
create mode 100644 drivers/hwmon/aspeed-pwm-tacho.c
diff --git a/Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt b/Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
new file mode 100644
index 000000000000..290122bfe170
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/aspeed-pwm-tacho.txt
@@ -0,0 +1,178 @@
+ASPEED AST2400/AST2500 PWM and Fan Tacho controller device driver
+
+The ASPEED PWM controller can support upto 8 PWM outputs. The ASPEED Fan Tacho
+controller can support upto 16 tachometer inputs.
+
+There are three different types M, N, O. These three types are just to have
+different PWM and Fan Tach settings. Each type can have the following settings:
+ PWM related:
+ 1) PWM period
+ 2) PWM clock division high
+ 3) PWM clock division low
+ Fan Tach related:
+ 1) Fan Tach type enable
+ 2) Fan Tach clock division
+ 3) Fan Tach mode selection
+ 4) Fan Tach period
+
+Each PWM port should be assigned a type which can be type M, N or O.
+
+Each Fan Tach channel should be assigned a PWM source, which can be PWM port A
+through H. The Fan Tach channel implicitly gets the type (M, N or O), from the
+type assigned to its PWM source.
+
+Required properties for pwm-tacho node:
+- #address-cells : should be 1.
+
+- #size-cells : should be 1.
+
+- reg : address and length of the register set for the device.
+
+- pinctrl-names : a pinctrl state named "default" must be defined.
+
+- pinctrl-0 : phandle referencing pin configuration of the AST2400/AST2500 PWM
+ ports.
+
+- compatible : should be "aspeed,aspeed2400-pwm-tacho" for AST2400 or
+ "aspeed,aspeed2500-pwm-tacho" for AST2500.
+
+- clocks : a fixed clock providing input clock frequency(PWM
+ and Fan Tach clock)
+
+type-values subnode format:
+===========================
+Under type-values subnode there can be upto 3 child nodes indicating type M/N/O
+values. Atleast one child node is required.
+
+Required properties for the child node(type M/N/O):
+- type : indicates type M/N/O. integer value in the range 0 to 2 with 0
+ indicating type M, 1 indicating type N and 2 indicating type O.
+
+- pwm-period : indicates type M/N/O PWM period, as per the AST2400/AST2500
+ datasheet. integer value in the range 0 to 255.
+
+- pwm-clock-division-l : indicates type M/N/O PWM clock division L value,
+ as per the AST2400/AST2500 datasheet.
+ integer value in the range 0 to 15.
+ 0 here indicates divide 1, 1 indicates divide 2,
+ 2 indicates divide 4, 3 indicates divide 6, and so on
+ till 15 indicates divide 30.
+
+- pwm-clock-division-h : indicates type M/N/O PWM clock division H value,
+ as per the AST2400/AST2500 datasheet.
+ integer value in the range 0 to 15.
+ 0 here indicates divide 1, 1 indicates divide 2,
+ 2 indicates divide 4, 3 indicates divide 8, and so on
+ till 15 indicates divide 32768.
+
+- fan-tach-type-enable : indicates fan tach enable of type M/N/O as per the
+ AST2400/AST2500 datasheet. boolean value.
+
+- fan-tach-clock-division : indicates fan tach clock division as per the
+ AST2400/AST2500 datasheet.
+ integer value in the range 0 to 7.
+ 0 indicates divide 4, 1 indicates divide 16,
+ 2 indicates divide 64, 3 indicates divide 256
+ and so on till 7 indicates divide 65536.
+
+- fan-tach-mode-selection : indicates fan tach mode mode selection as per the
+ AST2400/AST2500 datasheet. integer value in the
+ range 0 to 2. 0 indicates falling edge, 1 indicates
+ rising edge and 2 indicates both edges.
+
+- fan-tach-period : indicates fan tach period as per the AST2400/AST2500
+ datasheet. integer value (can be upto 16 bits long).
+
+pwm-port subnode format:
+========================
+Under pwm-port subnode there can upto 8 child nodes each indicating values
+for one of the 8 PWM output ports.
+
+Required properties for each child node(starting from PWM A through PWM H):
+- pwm-port : should specify PWM #X port , X ranges from A through H.
+ integer value in the range 0 to 7 with 0 indicating PWM port
+ A and 7 indicating PWM port H.
+
+- type : indicates type selection value of PWM port. integer value in the
+ range 0 to 2; 0 indicates type M, 1 indicates type N, 2 indicates
+ type O.
+
+- fan-ctrl : set the PWM duty cycle initial value. integer value between
+ 0(off) and 255(full speed).
+
+fan-tach-channel subnode format:
+================================
+Under fan-tach-channel subnode there can be upto 16 child nodes each indicating
+values for one of the 16 fan tach channels.
+
+Required properties for each child node(starting from fan tach #0 through
+fan tach #15):
+- fan-ctrl-gpios : should specify the tachometer input GPIO pin on the hardware.
+ Fan Tachometer function can only work when GPIO is in
+ ”input mode”
+
+- fan-tach : should specify the fan tach channel #X, X ranges from 0 through
+ 15. integer value in the range 0 through 15.
+
+- pwm-source : indicates PWM source of the fan tach channel. integer value in
+ the range 0 to 7. 0 indicates PWM port A, 1 indicates PWM
+ port B and so on till 7 indicates PWM port H.
+
+Examples:
+
+pwm-tacho-fixed-clk: fixedclk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <24000000>;
+}
+
+pwm-tacho: pwm-tacho-controller at 1e786000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x1E786000 0x1000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_pwm1_default>;
+ compatible = "aspeed,aspeed2500-pwm-tacho";
+ clocks = <&pwm-tacho-fixed-clk>;
+ type-values {
+ typem {
+ type = /bits/ 8 <0x00>;
+ pwm-period = /bits/ 8 <0x5F>;
+ pwm-clock-division-h = /bits/ 8 <0x00>;
+ pwm-clock-division-l = /bits/ 8 <0x05>;
+ fan-tach-type-enable;
+ fan-tach-clock-division = /bits/ 8 <0x00>;
+ fan-tach-mode-selection = /bits/ 8 <0x00>;
+ fan-tach-period = /bits/ 16 <0x1000>;
+ };
+ };
+
+ pwm-port {
+ pwm-port0 {
+ pwm-port = /bits/ 8 <0x00>;
+ type = /bits/ 8 <0x00>;
+ fan-ctrl = /bits/ 8 <0xFF>;
+ };
+
+ pwm-port1 {
+ pwm-port = /bits/ 8 <0x01>;
+ type = /bits/ 8 <0x00>;
+ fan-ctrl = /bits/ 8 <0xFF>;
+ };
+ };
+
+ fan-tach-channel {
+ fan-tach0 {
+ fan-ctrl-gpios = <&gpio ASPEED_GPIO(O, 0) GPIO_ACTIVE_HIGH>;
+ fan-tach = /bits/ 8 <0x00>;
+ pwm-source = /bits/ 8 <0x00>;
+ };
+
+ fan-tach1 {
+ fan-ctrl-gpios = <&gpio ASPEED_GPIO(O, 1) GPIO_ACTIVE_HIGH>;
+ fan-tach = /bits/ 8 <0x01>;
+ pwm-source = /bits/ 8 <0x01>;
+ };
+
+ };
+};
diff --git a/Documentation/hwmon/aspeed-pwm-tacho b/Documentation/hwmon/aspeed-pwm-tacho
new file mode 100644
index 000000000000..0e9ec6d5f900
--- /dev/null
+++ b/Documentation/hwmon/aspeed-pwm-tacho
@@ -0,0 +1,22 @@
+Kernel driver aspeed-pwm-tacho
+==============================
+
+Supported chips:
+ ASPEED AST2400/2500
+
+Authors:
+ <jaghu at google.com>
+
+Description:
+------------
+This driver implements support for ASPEED AST2400/2500 PWM and Fan Tacho
+controller. The PWM controller supports upto 8 PWM outputs. The Fan tacho
+controller supports upto 16 tachometer inputs.
+
+The driver provides the following sensor accesses in sysfs:
+
+fanX_input ro provide current fan rotation value in RPM as reported
+ by the fan to the device.
+
+pwmX rw get or set PWM fan control value. This is an integer
+ value between 0(off) and 255(full speed).
diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
index eef045b9670c..893cee348cf4 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-zaius.dts
@@ -83,6 +83,79 @@
gpios = <&gpio ASPEED_GPIO(H, 7) GPIO_ACTIVE_LOW>;
};
};
+
+ pwm_tacho: pwm-tacho-controller at 2e786000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x1E786000 0x1000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pwm0_default &pinctrl_pwm1_default
+ &pinctrl_pwm2_default &pinctrl_pwm3_default>;
+ compatible = "aspeed,aspeed2500-pwm-tacho";
+ clocks = <&pwm_tacho_fixed_clk>;
+ type-values {
+ typem {
+ type = /bits/ 8 <0x00>;
+ pwm-period = /bits/ 8 <0x5F>;
+ pwm-clock-division-h = /bits/ 8 <0x00>;
+ pwm-clock-division-l = /bits/ 8 <0x05>;
+ fan-tach-type-enable;
+ fan-tach-clock-division = /bits/ 8 <0x00>;
+ fan-tach-mode-selection = /bits/ 8 <0x00>;
+ fan-tach-period = /bits/ 16 <0x1000>;
+ };
+ };
+
+ pwm-port {
+ pwm-port0 {
+ pwm-port = /bits/ 8 <0x00>;
+ type = /bits/ 8 <0x00>;
+ fan-ctrl = /bits/ 8 <0xFF>;
+ };
+ pwm-port1 {
+ pwm-port = /bits/ 8 <0x01>;
+ type = /bits/ 8 <0x00>;
+ fan-ctrl = /bits/ 8 <0xFF>;
+ };
+ pwm-port2 {
+ pwm-port = /bits/ 8 <0x02>;
+ type = /bits/ 8 <0x00>;
+ fan-ctrl = /bits/ 8 <0xFF>;
+ };
+ pwm-port3 {
+ pwm-port = /bits/ 8 <0x03>;
+ type = /bits/ 8 <0x00>;
+ fan-ctrl = /bits/ 8 <0xFF>;
+ };
+ };
+
+ fan-tach-channel {
+ fan-tach0 {
+ fanctrl-gpios = <&gpio
+ ASPEED_GPIO(O, 0) GPIO_ACTIVE_HIGH>;
+ fan-tach = /bits/ 8 <0x00>;
+ pwm-source = /bits/ 8 <0x00>;
+ };
+ fan-tach1 {
+ fanctrl-gpios = <&gpio
+ ASPEED_GPIO(O, 1) GPIO_ACTIVE_HIGH>;
+ fan-tach = /bits/ 8 <0x01>;
+ pwm-source = /bits/ 8 <0x01>;
+ };
+ fan-tach2 {
+ fanctrl-gpios = <&gpio
+ ASPEED_GPIO(O, 2) GPIO_ACTIVE_HIGH>;
+ fan-tach = /bits/ 8 <0x02>;
+ pwm-source = /bits/ 8 <0x02>;
+ };
+ fan-tach3 {
+ fanctrl-gpios = <&gpio
+ ASPEED_GPIO(O, 3) GPIO_ACTIVE_HIGH>;
+ fan-tach = /bits/ 8 <0x03>;
+ pwm-source = /bits/ 8 <0x03>;
+ };
+ };
+ };
};
&uart5 {
diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index d72aea7ab8f2..710059ec0f78 100644
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -967,6 +967,12 @@
reg = <0x1e6e202c 0x4>;
};
+ pwm_tacho_fixed_clk: fixedclk {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <24000000>;
+ };
+
sram at 1e720000 {
compatible = "mmio-sram";
reg = <0x1e720000 0x9000>; // 36K
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index d4de8d5aeed4..8a249a95c1b4 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -341,6 +341,15 @@ config SENSORS_ASB100
This driver can also be built as a module. If so, the module
will be called asb100.
+config SENSORS_ASPEED
+ tristate "ASPEED AST2400/AST2500 PWM and Fan tach driver"
+ help
+ This driver provides support for ASPEED AST2400/AST2500 PWM
+ and Fan Tacho controllers.
+
+ This driver can also be built as a module. If so, the module
+ will be called aspeed_pwm_tacho.
+
config SENSORS_ATXP1
tristate "Attansic ATXP1 VID controller"
depends on I2C
@@ -1505,7 +1514,7 @@ config SENSORS_ADS7871
config SENSORS_AMC6821
tristate "Texas Instruments AMC6821"
- depends on I2C
+ depends on I2C
help
If you say yes here you get support for the Texas Instruments
AMC6821 hardware monitoring chips.
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 4455478e9e7a..9d2e643bc985 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_SENSORS_ADT7475) += adt7475.o
obj-$(CONFIG_SENSORS_APPLESMC) += applesmc.o
obj-$(CONFIG_SENSORS_ARM_SCPI) += scpi-hwmon.o
obj-$(CONFIG_SENSORS_ASC7621) += asc7621.o
+obj-$(CONFIG_SENSORS_ASPEED) += aspeed-pwm-tacho.o
obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o
obj-$(CONFIG_SENSORS_CORETEMP) += coretemp.o
obj-$(CONFIG_SENSORS_DA9052_ADC)+= da9052-hwmon.o
diff --git a/drivers/hwmon/aspeed-pwm-tacho.c b/drivers/hwmon/aspeed-pwm-tacho.c
new file mode 100644
index 000000000000..21ed91a9dc2e
--- /dev/null
+++ b/drivers/hwmon/aspeed-pwm-tacho.c
@@ -0,0 +1,895 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or later as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/delay.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/sysfs.h>
+#include <linux/regmap.h>
+
+/* ASPEED PWM & FAN Tach Register Definition */
+#define ASPEED_PTCR_CTRL 0x00
+#define ASPEED_PTCR_CLK_CTRL 0x04
+#define ASPEED_PTCR_DUTY0_CTRL 0x08
+#define ASPEED_PTCR_DUTY1_CTRL 0x0c
+#define ASPEED_PTCR_TYPEM_CTRL 0x10
+#define ASPEED_PTCR_TYPEM_CTRL1 0x14
+#define ASPEED_PTCR_TYPEN_CTRL 0x18
+#define ASPEED_PTCR_TYPEN_CTRL1 0x1c
+#define ASPEED_PTCR_TACH_SOURCE 0x20
+#define ASPEED_PTCR_TRIGGER 0x28
+#define ASPEED_PTCR_RESULT 0x2c
+#define ASPEED_PTCR_INTR_CTRL 0x30
+#define ASPEED_PTCR_INTR_STS 0x34
+#define ASPEED_PTCR_TYPEM_LIMIT 0x38
+#define ASPEED_PTCR_TYPEN_LIMIT 0x3C
+#define ASPEED_PTCR_CTRL_EXT 0x40
+#define ASPEED_PTCR_CLK_CTRL_EXT 0x44
+#define ASPEED_PTCR_DUTY2_CTRL 0x48
+#define ASPEED_PTCR_DUTY3_CTRL 0x4c
+#define ASPEED_PTCR_TYPEO_CTRL 0x50
+#define ASPEED_PTCR_TYPEO_CTRL1 0x54
+#define ASPEED_PTCR_TACH_SOURCE_EXT 0x60
+#define ASPEED_PTCR_TYPEO_LIMIT 0x78
+
+/* ASPEED_PTCR_CTRL : 0x00 - General Control Register */
+#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1 15
+#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2 6
+#define ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK (BIT(7) | BIT(15))
+
+#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1 14
+#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2 5
+#define ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK (BIT(6) | BIT(14))
+
+#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1 13
+#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2 4
+#define ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK (BIT(5) | BIT(13))
+
+#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1 12
+#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2 3
+#define ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK (BIT(4) | BIT(12))
+
+#define ASPEED_PTCR_CTRL_FAN_NUM_EN(x) BIT(16 + x)
+
+#define ASPEED_PTCR_CTRL_PWMD_EN BIT(11)
+#define ASPEED_PTCR_CTRL_PWMC_EN BIT(10)
+#define ASPEED_PTCR_CTRL_PWMB_EN BIT(9)
+#define ASPEED_PTCR_CTRL_PWMA_EN BIT(8)
+
+#define ASPEED_PTCR_CTRL_CLK_SRC BIT(1)
+#define ASPEED_PTCR_CTRL_CLK_EN BIT(0)
+
+/* ASPEED_PTCR_CLK_CTRL : 0x04 - Clock Control Register */
+/* TYPE N */
+#define ASPEED_PTCR_CLK_CTRL_TYPEN_MASK GENMASK(31, 16)
+#define ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT 24
+#define ASPEED_PTCR_CLK_CTRL_TYPEN_H 20
+#define ASPEED_PTCR_CLK_CTRL_TYPEN_L 16
+/* TYPE M */
+#define ASPEED_PTCR_CLK_CTRL_TYPEM_MASK GENMASK(15, 0)
+#define ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT 8
+#define ASPEED_PTCR_CLK_CTRL_TYPEM_H 4
+#define ASPEED_PTCR_CLK_CTRL_TYPEM_L 0
+
+/*
+ * ASPEED_PTCR_DUTY_CTRL/1/2/3 : 0x08/0x0C/0x48/0x4C - PWM-FAN duty control
+ * 0/1/2/3 register
+ */
+#define DUTY_CTRL_PWM2_FALL_POINT 24
+#define DUTY_CTRL_PWM2_RISE_POINT 16
+#define DUTY_CTRL_PWM2_RISE_FALL_MASK GENMASK(31, 16)
+#define DUTY_CTRL_PWM1_FALL_POINT 8
+#define DUTY_CTRL_PWM1_RISE_POINT 0
+#define DUTY_CTRL_PWM1_RISE_FALL_MASK GENMASK(15, 0)
+
+/* ASPEED_PTCR_TYPEM_CTRL : 0x10/0x18/0x50 - Type M/N/O Ctrl 0 Register */
+#define TYPE_CTRL_FAN_MASK (GENMASK(5, 1) | GENMASK(31, 16))
+#define TYPE_CTRL_FAN1_MASK GENMASK(31, 0)
+#define TYPE_CTRL_FAN_PERIOD 16
+#define TYPE_CTRL_FAN_MODE 4
+#define TYPE_CTRL_FAN_DIVISION 1
+#define TYPE_CTRL_FAN_TYPE_EN 1
+
+/* ASPEED_PTCR_TACH_SOURCE : 0x20/0x60 - Tach Source Register */
+/* bit [0,1] at 0x20, bit [2] at 0x60 */
+#define TACH_PWM_SOURCE_BIT01(x) (x * 2)
+#define TACH_PWM_SOURCE_BIT2(x) (x * 2)
+#define TACH_PWM_SOURCE_MASK_BIT01(x) (0x3 << (x * 2))
+#define TACH_PWM_SOURCE_MASK_BIT2(x) BIT(x * 2)
+
+/* ASPEED_PTCR_RESULT : 0x2c - Result Register */
+#define RESULT_STATUS_MASK BIT(31)
+#define RESULT_VALUE_MASK 0xfffff
+
+/* ASPEED_PTCR_CTRL_EXT : 0x40 - General Control Extension #1 Register */
+#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1 15
+#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2 6
+#define ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK (BIT(7) | BIT(15))
+
+#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1 14
+#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2 5
+#define ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK (BIT(6) | BIT(14))
+
+#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1 13
+#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2 4
+#define ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK (BIT(5) | BIT(13))
+
+#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1 12
+#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2 3
+#define ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK (BIT(4) | BIT(12))
+
+#define ASPEED_PTCR_CTRL_PWMH_EN BIT(11)
+#define ASPEED_PTCR_CTRL_PWMG_EN BIT(10)
+#define ASPEED_PTCR_CTRL_PWMF_EN BIT(9)
+#define ASPEED_PTCR_CTRL_PWME_EN BIT(8)
+
+/* ASPEED_PTCR_CLK_EXT_CTRL : 0x44 - Clock Control Extension #1 Register */
+/* TYPE O */
+#define ASPEED_PTCR_CLK_CTRL_TYPEO_MASK GENMASK(15, 0)
+#define ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT 8
+#define ASPEED_PTCR_CLK_CTRL_TYPEO_H 4
+#define ASPEED_PTCR_CLK_CTRL_TYPEO_L 0
+
+#define PWM_MAX 255
+
+struct aspeed_pwm_tacho_regmap {
+ void __iomem *regs;
+};
+
+struct aspeed_pwm_tacho_data {
+ struct regmap *regmap;
+ unsigned long clk_freq;
+ bool pwm_present[8];
+ bool fan_present[16];
+ u8 type_pwm_clock_unit[3];
+ u8 type_pwm_clock_division_h[3];
+ u8 type_pwm_clock_division_l[3];
+ u8 type_fan_tach_clock_division[3];
+ u16 type_fan_tach_unit[3];
+ u8 pwm_port_type[8];
+ u8 pwm_port_fan_ctrl[8];
+ u8 fan_tach_ch_source[16];
+ const struct attribute_group *groups[2];
+};
+
+enum type { TYPEM, TYPEN, TYPEO };
+
+struct type_params {
+ u32 l_value;
+ u32 h_value;
+ u32 unit_value;
+ u32 clk_ctrl_mask;
+ u32 clk_ctrl_reg;
+ u32 ctrl_reg;
+ u32 ctrl_reg1;
+};
+
+static const struct type_params type_params[] = {
+ [TYPEM] = {
+ .l_value = ASPEED_PTCR_CLK_CTRL_TYPEM_L,
+ .h_value = ASPEED_PTCR_CLK_CTRL_TYPEM_H,
+ .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEM_UNIT,
+ .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEM_MASK,
+ .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
+ .ctrl_reg = ASPEED_PTCR_TYPEM_CTRL,
+ .ctrl_reg1 = ASPEED_PTCR_TYPEM_CTRL1,
+ },
+ [TYPEN] = {
+ .l_value = ASPEED_PTCR_CLK_CTRL_TYPEN_L,
+ .h_value = ASPEED_PTCR_CLK_CTRL_TYPEN_H,
+ .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEN_UNIT,
+ .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEN_MASK,
+ .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL,
+ .ctrl_reg = ASPEED_PTCR_TYPEN_CTRL,
+ .ctrl_reg1 = ASPEED_PTCR_TYPEN_CTRL1,
+ },
+ [TYPEO] = {
+ .l_value = ASPEED_PTCR_CLK_CTRL_TYPEO_L,
+ .h_value = ASPEED_PTCR_CLK_CTRL_TYPEO_H,
+ .unit_value = ASPEED_PTCR_CLK_CTRL_TYPEO_UNIT,
+ .clk_ctrl_mask = ASPEED_PTCR_CLK_CTRL_TYPEO_MASK,
+ .clk_ctrl_reg = ASPEED_PTCR_CLK_CTRL_EXT,
+ .ctrl_reg = ASPEED_PTCR_TYPEO_CTRL,
+ .ctrl_reg1 = ASPEED_PTCR_TYPEO_CTRL1,
+ }
+};
+
+enum pwm_port { PWMA, PWMB, PWMC, PWMD, PWME, PWMF, PWMG, PWMH };
+
+struct pwm_port_params {
+ u32 pwm_en;
+ u32 ctrl_reg;
+ u32 type_part1;
+ u32 type_part2;
+ u32 type_mask;
+ u32 duty_ctrl_rise_point;
+ u32 duty_ctrl_fall_point;
+ u32 duty_ctrl_reg;
+ u32 duty_ctrl_rise_fall_mask;
+};
+
+static const struct pwm_port_params pwm_port_params[] = {
+ [PWMA] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMA_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMA_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
+ },
+ [PWMB] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMB_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMB_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY0_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
+ },
+ [PWMC] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMC_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMC_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
+ },
+ [PWMD] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMD_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMD_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY1_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
+ },
+ [PWME] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWME_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWME_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWME_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
+ },
+ [PWMF] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMF_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMF_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY2_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
+ },
+ [PWMG] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMG_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMG_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM1_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM1_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM1_RISE_FALL_MASK,
+ },
+ [PWMH] = {
+ .pwm_en = ASPEED_PTCR_CTRL_PWMH_EN,
+ .ctrl_reg = ASPEED_PTCR_CTRL_EXT,
+ .type_part1 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART1,
+ .type_part2 = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_PART2,
+ .type_mask = ASPEED_PTCR_CTRL_SET_PWMH_TYPE_MASK,
+ .duty_ctrl_rise_point = DUTY_CTRL_PWM2_RISE_POINT,
+ .duty_ctrl_fall_point = DUTY_CTRL_PWM2_FALL_POINT,
+ .duty_ctrl_reg = ASPEED_PTCR_DUTY3_CTRL,
+ .duty_ctrl_rise_fall_mask = DUTY_CTRL_PWM2_RISE_FALL_MASK,
+ }
+};
+
+static int regmap_aspeed_pwm_tacho_reg_write(void *context, unsigned int reg,
+ unsigned int val)
+{
+ struct aspeed_pwm_tacho_regmap *hregmap = context;
+
+ writel(val, hregmap->regs + reg);
+ return 0;
+}
+
+static int regmap_aspeed_pwm_tacho_reg_read(void *context, unsigned int reg,
+ unsigned int *val)
+{
+ struct aspeed_pwm_tacho_regmap *hregmap = context;
+
+ *val = readl(hregmap->regs + reg);
+ return 0;
+}
+
+static const struct regmap_config aspeed_pwm_tacho_regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+ .max_register = ASPEED_PTCR_TYPEO_LIMIT,
+ .reg_write = regmap_aspeed_pwm_tacho_reg_write,
+ .reg_read = regmap_aspeed_pwm_tacho_reg_read,
+ .fast_io = true,
+};
+
+static void aspeed_set_clock_enable(struct regmap *regmap, bool val)
+{
+ regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
+ ASPEED_PTCR_CTRL_CLK_EN,
+ val ? ASPEED_PTCR_CTRL_CLK_EN : 0);
+}
+
+static void aspeed_set_clock_source(struct regmap *regmap, int val)
+{
+ regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
+ ASPEED_PTCR_CTRL_CLK_SRC,
+ val ? ASPEED_PTCR_CTRL_CLK_SRC : 0);
+}
+
+static void aspeed_set_pwm_clock_values(struct regmap *regmap, u8 type,
+ u8 div_high, u8 div_low, u8 unit)
+{
+
+ u32 reg_value = ((div_high << type_params[type].h_value) |
+ (div_low << type_params[type].l_value) |
+ (unit << type_params[type].unit_value));
+
+ regmap_update_bits(regmap, type_params[type].clk_ctrl_reg,
+ type_params[type].clk_ctrl_mask, reg_value);
+}
+
+static void aspeed_set_pwm_port_enable(struct regmap *regmap, u8 pwm_port,
+ bool enable)
+{
+ regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
+ pwm_port_params[pwm_port].pwm_en,
+ enable ? pwm_port_params[pwm_port].pwm_en : 0);
+}
+
+static void aspeed_set_pwm_port_type(struct regmap *regmap,
+ u8 pwm_port, u8 type)
+{
+ u32 reg_value = (type & 0x1) << pwm_port_params[pwm_port].type_part1;
+
+ reg_value |= (type & 0x2) << pwm_port_params[pwm_port].type_part2;
+
+ regmap_update_bits(regmap, pwm_port_params[pwm_port].ctrl_reg,
+ pwm_port_params[pwm_port].type_mask, reg_value);
+}
+
+static void aspeed_set_pwm_port_duty_rising_falling(struct regmap *regmap,
+ u8 pwm_port, u8 rising,
+ u8 falling)
+{
+ u32 reg_value = (rising <<
+ pwm_port_params[pwm_port].duty_ctrl_rise_point);
+ reg_value |= (falling <<
+ pwm_port_params[pwm_port].duty_ctrl_fall_point);
+
+ regmap_update_bits(regmap, pwm_port_params[pwm_port].duty_ctrl_reg,
+ pwm_port_params[pwm_port].duty_ctrl_rise_fall_mask,
+ reg_value);
+}
+
+static void aspeed_set_tacho_type_enable(struct regmap *regmap, u8 type,
+ bool enable)
+{
+ regmap_update_bits(regmap, type_params[type].ctrl_reg,
+ TYPE_CTRL_FAN_TYPE_EN,
+ enable ? TYPE_CTRL_FAN_TYPE_EN : 0);
+}
+
+static void aspeed_set_tacho_type_values(struct regmap *regmap, u8 type,
+ u8 mode, u16 unit, u8 division)
+{
+ u32 reg_value = ((mode << TYPE_CTRL_FAN_MODE) |
+ (unit << TYPE_CTRL_FAN_PERIOD) |
+ (division << TYPE_CTRL_FAN_DIVISION));
+
+ regmap_update_bits(regmap, type_params[type].ctrl_reg,
+ TYPE_CTRL_FAN_MASK, reg_value);
+ regmap_update_bits(regmap, type_params[type].ctrl_reg1,
+ TYPE_CTRL_FAN1_MASK, unit << 16);
+}
+
+static void aspeed_set_fan_tach_ch_enable(struct regmap *regmap, u8 fan_tach_ch,
+ bool enable)
+{
+ regmap_update_bits(regmap, ASPEED_PTCR_CTRL,
+ ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch),
+ enable ?
+ ASPEED_PTCR_CTRL_FAN_NUM_EN(fan_tach_ch) : 0);
+}
+
+static void aspeed_set_fan_tach_ch_source(struct regmap *regmap, u8 fan_tach_ch,
+ u8 fan_tach_ch_source)
+{
+ u32 reg_value1 = ((fan_tach_ch_source & 0x3) <<
+ TACH_PWM_SOURCE_BIT01(fan_tach_ch));
+ u32 reg_value2 = (((fan_tach_ch_source & 0x4) >> 2) <<
+ TACH_PWM_SOURCE_BIT2(fan_tach_ch));
+
+ regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE,
+ TACH_PWM_SOURCE_MASK_BIT01(fan_tach_ch),
+ reg_value1);
+
+ regmap_update_bits(regmap, ASPEED_PTCR_TACH_SOURCE_EXT,
+ TACH_PWM_SOURCE_MASK_BIT2(fan_tach_ch),
+ reg_value2);
+}
+
+static void aspeed_set_pwm_port_fan_ctrl(struct aspeed_pwm_tacho_data *priv,
+ u8 index, u8 fan_ctrl)
+{
+ u16 period, dc_time_on;
+
+ period = priv->type_pwm_clock_unit[priv->pwm_port_type[index]];
+ period += 1;
+ dc_time_on = (fan_ctrl * period) / PWM_MAX;
+
+ if (dc_time_on == 0) {
+ aspeed_set_pwm_port_enable(priv->regmap, index, false);
+ } else {
+ if (dc_time_on == period)
+ dc_time_on = 0;
+
+ aspeed_set_pwm_port_duty_rising_falling(priv->regmap, index, 0,
+ dc_time_on);
+ aspeed_set_pwm_port_enable(priv->regmap, index, true);
+ }
+}
+
+static u32 aspeed_get_fan_tach_ch_measure_period(struct aspeed_pwm_tacho_data
+ *priv, u8 type)
+{
+ u32 clk;
+ u16 tacho_unit;
+ u8 clk_unit, div_h, div_l, tacho_div;
+
+ clk = priv->clk_freq;
+ clk_unit = priv->type_pwm_clock_unit[type];
+ div_h = priv->type_pwm_clock_division_h[type];
+ div_h = 0x1 << div_h;
+ div_l = priv->type_pwm_clock_division_l[type];
+ if (div_l == 0)
+ div_l = 1;
+ else
+ div_l = div_l * 2;
+
+ tacho_unit = priv->type_fan_tach_unit[type];
+ tacho_div = priv->type_fan_tach_clock_division[type];
+
+ tacho_div = 0x4 << (tacho_div * 2);
+ return clk / (clk_unit * div_h * div_l * tacho_div * tacho_unit);
+}
+
+static u32 aspeed_get_fan_tach_ch_rpm(struct aspeed_pwm_tacho_data *priv,
+ u8 fan_tach_ch)
+{
+ u32 raw_data, rpm, tach_div, clk_source, timeout = 0, sec, val;
+ u8 fan_tach_ch_source, type;
+
+ regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0);
+ regmap_write(priv->regmap, ASPEED_PTCR_TRIGGER, 0x1 << fan_tach_ch);
+
+ fan_tach_ch_source = priv->fan_tach_ch_source[fan_tach_ch];
+ type = priv->pwm_port_type[fan_tach_ch_source];
+
+ sec = (1000 / aspeed_get_fan_tach_ch_measure_period(priv, type));
+
+ msleep(sec);
+
+ regmap_read(priv->regmap, ASPEED_PTCR_RESULT, &val);
+ while (!(val & RESULT_STATUS_MASK)) {
+ timeout++;
+ if (timeout > 1)
+ return 0;
+ msleep(sec);
+ }
+
+ regmap_read(priv->regmap, ASPEED_PTCR_RESULT, &val);
+ raw_data = val & RESULT_VALUE_MASK;
+ tach_div = priv->type_fan_tach_clock_division[type];
+
+ tach_div = 0x4 << (tach_div * 2);
+ clk_source = priv->clk_freq;
+
+ if (raw_data == 0)
+ return 0;
+ else
+ return (clk_source * 60) / (2 * raw_data * tach_div);
+}
+
+static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int index = sensor_attr->index;
+ int ret;
+ struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
+ long fan_ctrl;
+ u32 val;
+ int i;
+
+ ret = kstrtol(buf, 10, &fan_ctrl);
+ if (ret != 0)
+ return ret;
+
+ if (fan_ctrl < 0 || fan_ctrl > PWM_MAX)
+ return -EINVAL;
+
+ if (priv->pwm_port_fan_ctrl[index] == fan_ctrl)
+ return count;
+
+ priv->pwm_port_fan_ctrl[index] = fan_ctrl;
+ aspeed_set_pwm_port_fan_ctrl(priv, index, fan_ctrl);
+
+ return count;
+}
+
+static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int index = sensor_attr->index;
+ struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", priv->pwm_port_fan_ctrl[index]);
+}
+
+static ssize_t show_rpm(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int index = sensor_attr->index;
+ u32 rpm;
+ struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
+
+ rpm = aspeed_get_fan_tach_ch_rpm(priv, index);
+
+ return sprintf(buf, "%u\n", rpm);
+}
+
+static umode_t pwm_is_visible(struct kobject *kobj,
+ struct attribute *a, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
+
+ if (!priv->pwm_present[index])
+ return 0;
+ return a->mode;
+}
+
+static umode_t fan_dev_is_visible(struct kobject *kobj,
+ struct attribute *a, int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct aspeed_pwm_tacho_data *priv = dev_get_drvdata(dev);
+
+ if (!priv->fan_present[index])
+ return 0;
+ return a->mode;
+}
+
+static SENSOR_DEVICE_ATTR(pwm0, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 0);
+static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 1);
+static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 2);
+static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 3);
+static SENSOR_DEVICE_ATTR(pwm4, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 4);
+static SENSOR_DEVICE_ATTR(pwm5, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 5);
+static SENSOR_DEVICE_ATTR(pwm6, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 6);
+static SENSOR_DEVICE_ATTR(pwm7, S_IRUGO | S_IWUSR,
+ show_pwm, set_pwm, 7);
+
+static struct attribute *pwm_dev_attrs[] = {
+ &sensor_dev_attr_pwm0.dev_attr.attr,
+ &sensor_dev_attr_pwm1.dev_attr.attr,
+ &sensor_dev_attr_pwm2.dev_attr.attr,
+ &sensor_dev_attr_pwm3.dev_attr.attr,
+ &sensor_dev_attr_pwm4.dev_attr.attr,
+ &sensor_dev_attr_pwm5.dev_attr.attr,
+ &sensor_dev_attr_pwm6.dev_attr.attr,
+ &sensor_dev_attr_pwm7.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group pwm_dev_group = {
+ .attrs = pwm_dev_attrs,
+ .is_visible = pwm_is_visible,
+};
+
+static SENSOR_DEVICE_ATTR(fan0_input, S_IRUGO,
+ show_rpm, NULL, 0);
+static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO,
+ show_rpm, NULL, 1);
+static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO,
+ show_rpm, NULL, 2);
+static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO,
+ show_rpm, NULL, 3);
+static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO,
+ show_rpm, NULL, 4);
+static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO,
+ show_rpm, NULL, 5);
+static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO,
+ show_rpm, NULL, 6);
+static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO,
+ show_rpm, NULL, 7);
+static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO,
+ show_rpm, NULL, 8);
+static SENSOR_DEVICE_ATTR(fan9_input, S_IRUGO,
+ show_rpm, NULL, 9);
+static SENSOR_DEVICE_ATTR(fan10_input, S_IRUGO,
+ show_rpm, NULL, 10);
+static SENSOR_DEVICE_ATTR(fan11_input, S_IRUGO,
+ show_rpm, NULL, 11);
+static SENSOR_DEVICE_ATTR(fan12_input, S_IRUGO,
+ show_rpm, NULL, 12);
+static SENSOR_DEVICE_ATTR(fan13_input, S_IRUGO,
+ show_rpm, NULL, 13);
+static SENSOR_DEVICE_ATTR(fan14_input, S_IRUGO,
+ show_rpm, NULL, 14);
+static SENSOR_DEVICE_ATTR(fan15_input, S_IRUGO,
+ show_rpm, NULL, 15);
+
+static struct attribute *fan_dev_attrs[] = {
+ &sensor_dev_attr_fan0_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan4_input.dev_attr.attr,
+ &sensor_dev_attr_fan5_input.dev_attr.attr,
+ &sensor_dev_attr_fan6_input.dev_attr.attr,
+ &sensor_dev_attr_fan7_input.dev_attr.attr,
+ &sensor_dev_attr_fan8_input.dev_attr.attr,
+ &sensor_dev_attr_fan9_input.dev_attr.attr,
+ &sensor_dev_attr_fan10_input.dev_attr.attr,
+ &sensor_dev_attr_fan11_input.dev_attr.attr,
+ &sensor_dev_attr_fan12_input.dev_attr.attr,
+ &sensor_dev_attr_fan13_input.dev_attr.attr,
+ &sensor_dev_attr_fan14_input.dev_attr.attr,
+ &sensor_dev_attr_fan15_input.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group fan_dev_group = {
+ .attrs = fan_dev_attrs,
+ .is_visible = fan_dev_is_visible,
+};
+
+/*
+ * If the clock type is type M then :
+ * The PWM frequency = 24MHz / (type M clock division L bit *
+ * type M clock division H bit * (type M PWM period bit + 1))
+ */
+static int aspeed_create_type(struct device_node *child,
+ struct aspeed_pwm_tacho_data *priv)
+{
+ u8 period, div_l, div_h, type, mode, div;
+ bool enable;
+ u16 unit;
+ int err;
+
+ err = of_property_read_u8(child, "type", &type);
+ if (err)
+ return err;
+ err = of_property_read_u8(child, "pwm-period", &period);
+ if (err)
+ return err;
+ err = of_property_read_u8(child, "pwm-clock-division-h", &div_h);
+ if (err)
+ return err;
+ err = of_property_read_u8(child, "pwm-clock-division-l", &div_l);
+ if (err)
+ return err;
+ priv->type_pwm_clock_division_h[type] = div_h;
+ priv->type_pwm_clock_division_l[type] = div_l;
+ priv->type_pwm_clock_unit[type] = period;
+ aspeed_set_pwm_clock_values(priv->regmap, type, div_h, div_l, period);
+
+ enable = of_property_read_bool(child, "fan-tach-type-enable");
+ if (!enable)
+ return -EINVAL;
+ aspeed_set_tacho_type_enable(priv->regmap, type, enable);
+
+ err = of_property_read_u8(child, "fan-tach-clock-division", &div);
+ if (err)
+ return err;
+ priv->type_fan_tach_clock_division[type] = div;
+
+ err = of_property_read_u8(child, "fan-tach-mode-selection", &mode);
+ if (err)
+ return err;
+
+ err = of_property_read_u16(child, "fan-tach-period", &unit);
+ if (err)
+ return err;
+ priv->type_fan_tach_unit[type] = unit;
+ aspeed_set_tacho_type_values(priv->regmap, type, mode, unit, div);
+
+ return 0;
+}
+
+static int aspeed_create_pwm_port(struct device_node *child,
+ struct aspeed_pwm_tacho_data *priv)
+{
+ u8 val, index;
+ int err;
+
+ err = of_property_read_u8(child, "pwm-port", &val);
+ if (err)
+ return err;
+ aspeed_set_pwm_port_enable(priv->regmap, val, true);
+ priv->pwm_present[val] = true;
+ index = val;
+
+ err = of_property_read_u8(child, "type", &val);
+ if (err)
+ return err;
+ priv->pwm_port_type[index] = val;
+ aspeed_set_pwm_port_type(priv->regmap, index, val);
+
+ err = of_property_read_u8(child, "fan-ctrl", &val);
+ if (err)
+ return err;
+ priv->pwm_port_fan_ctrl[index] = val;
+ aspeed_set_pwm_port_fan_ctrl(priv, index, val);
+
+ return 0;
+}
+
+static int aspeed_create_fan_tach_channel(struct device *dev,
+ struct device_node *child,
+ struct aspeed_pwm_tacho_data *priv)
+{
+ u8 val, index;
+ int err;
+ struct gpio_desc *fan_ctrl = devm_gpiod_get(dev, "fanctrl", GPIOD_IN);
+
+ err = of_property_read_u8(child, "fan-tach", &val);
+ if (err)
+ return err;
+ aspeed_set_fan_tach_ch_enable(priv->regmap, val, true);
+ index = val;
+ priv->fan_present[index] = true;
+ err = of_property_read_u8(child, "pwm-source", &val);
+ if (err)
+ return err;
+ priv->fan_tach_ch_source[index] = val;
+ aspeed_set_fan_tach_ch_source(priv->regmap, index, val);
+
+ return 0;
+}
+
+static int aspeed_pwm_tacho_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np, *type_np, *pwm_np, *fan_tach_np, *child;
+ struct aspeed_pwm_tacho_data *priv;
+ struct aspeed_pwm_tacho_regmap *hregmap;
+ struct resource *res;
+ struct device *hwmon;
+ struct clk *clk;
+ u32 *val;
+ int ret;
+ unsigned int i;
+
+ np = dev->of_node;
+
+ hregmap = devm_kzalloc(dev, sizeof(*hregmap), GFP_KERNEL);
+ if (!hregmap)
+ return -ENOMEM;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOENT;
+ hregmap->regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(hregmap->regs))
+ return PTR_ERR(hregmap->regs);
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->regmap = devm_regmap_init(dev, NULL, hregmap,
+ &aspeed_pwm_tacho_regmap_config);
+ if (IS_ERR(priv->regmap))
+ return PTR_ERR(priv->regmap);
+ regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE, 0);
+ regmap_write(priv->regmap, ASPEED_PTCR_TACH_SOURCE_EXT, 0);
+
+ clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(clk))
+ return -ENODEV;
+ priv->clk_freq = clk_get_rate(clk);
+ aspeed_set_clock_enable(priv->regmap, true);
+ aspeed_set_clock_source(priv->regmap, 0);
+ type_np = of_get_child_by_name(np, "type-values");
+ if (!type_np)
+ return -EINVAL;
+ for_each_child_of_node(type_np, child) {
+ ret = aspeed_create_type(child, priv);
+ if (ret)
+ return ret;
+ }
+ of_node_put(type_np);
+ pwm_np = of_get_child_by_name(np, "pwm-port");
+ if (!pwm_np)
+ return -EINVAL;
+ for_each_child_of_node(pwm_np, child) {
+ ret = aspeed_create_pwm_port(child, priv);
+ if (ret)
+ return ret;
+ }
+ of_node_put(pwm_np);
+ fan_tach_np = of_get_child_by_name(np, "fan-tach-channel");
+ if (!fan_tach_np)
+ return -EINVAL;
+ for_each_child_of_node(fan_tach_np, child) {
+ ret = aspeed_create_fan_tach_channel(dev, child, priv);
+ if (ret)
+ return ret;
+ }
+ of_node_put(fan_tach_np);
+ of_node_put(np);
+ priv->groups[0] = &pwm_dev_group;
+ priv->groups[1] = &fan_dev_group;
+ hwmon = devm_hwmon_device_register_with_groups(dev,
+ "aspeed_pwm_tacho",
+ priv, priv->groups);
+
+ return PTR_ERR_OR_ZERO(hwmon);
+}
+
+static const struct of_device_id of_pwm_tacho_match_table[] = {
+ { .compatible = "aspeed,aspeed2400-pwm-tacho", },
+ { .compatible = "aspeed,aspeed2500-pwm-tacho", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_pwm_tacho_match_table);
+
+static struct platform_driver aspeed_pwm_tacho_driver = {
+ .probe = aspeed_pwm_tacho_probe,
+ .driver = {
+ .name = "aspeed_pwm_tacho",
+ .of_match_table = of_pwm_tacho_match_table,
+ },
+};
+
+module_platform_driver(aspeed_pwm_tacho_driver);
+
+MODULE_AUTHOR("Jaghathiswari Rankappagounder Natarajan <jaghu at google.com>");
+MODULE_DESCRIPTION("ASPEED PWM and Fan Tacho device driver");
+MODULE_LICENSE("GPL");
--
2.11.0.483.g087da7b7c-goog
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