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authorVictor Ding <victording@google.com>2022-11-02 08:24:41 +0000
committerEric Lai <eric_lai@quanta.corp-partner.google.com>2022-11-09 07:51:57 +0000
commit20265b09dc6bbfb8c708accf6c0cf67f63cb79c3 (patch)
treea9ef6de1caa5c9ef0e132b2b1aa1a210c421d09a /src
parentb4d71e1ab2010083f61e218a70abc0ec5803d08b (diff)
drivers/i2c/sx9324: Add support for Linux's SX9324 driver
SX9324 driver is updated per Linux's documentation found at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/iio/proximity/semtech,sx9324.yaml Supporting logic for the deprecated SX932x driver is hence guarded by DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER This patch by itself does not introduce functional changes to any board. The legacy SX932x Linux driver never reached upstream Linux and is only available in ChromeOS kernel fork of 4.4 and 5.4. Linux later accepted a different implementation named SX9324 and has been available since 5.4. Ideally all variants should adopt the new driver; however, during the transition phase, coreboot must support both drivers. It is better to have a single firmware build that can work with both Linux kernel drivers by specifying both sets of properties. Legacy driver support should be deleted once all variants finish migration. BUG=b:242662878 TEST=Dump ACPI SSDT then verify _DSD entries related to the legacy SX932x driver are identical w/ and w/o this patch (Tested on Craask and Nivviks) Change-Id: I42cd6841c3a270c242ed2e739db245e858eadb3b Signed-off-by: Victor Ding <victording@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/69192 Reviewed-by: Reka Norman <rekanorman@chromium.org> Reviewed-by: Tarun Tuli <taruntuli@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Diffstat (limited to 'src')
-rw-r--r--src/drivers/i2c/sx9324/Kconfig16
-rw-r--r--src/drivers/i2c/sx9324/chip.h141
-rw-r--r--src/drivers/i2c/sx9324/registers.h4
-rw-r--r--src/drivers/i2c/sx9324/sx9324.c16
-rw-r--r--src/mainboard/google/brya/Kconfig.name5
-rw-r--r--src/mainboard/google/dedede/Kconfig.name5
-rw-r--r--src/mainboard/google/zork/Kconfig.name1
7 files changed, 188 insertions, 0 deletions
diff --git a/src/drivers/i2c/sx9324/Kconfig b/src/drivers/i2c/sx9324/Kconfig
index 77f6967b7e..222ff8d476 100644
--- a/src/drivers/i2c/sx9324/Kconfig
+++ b/src/drivers/i2c/sx9324/Kconfig
@@ -4,3 +4,19 @@ config DRIVERS_I2C_SX9324
depends on HAVE_ACPI_TABLES
help
Board has a Semtech SX9324 proximity sensor.
+
+config DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
+ bool
+ default n
+ depends on DRIVERS_I2C_SX9324
+ help
+ Board may use the legacy sx932x linux driver.
+ This option is mainly to ease migrating from the legacy driver to the
+ Linux one and should be deleted once all variants finish migration.
+ This driver never reached upstream Linux and is only available in
+ ChromeOS kernel fork of 4.4 and 5.4. Linux later accepted a different
+ implementation named SX9324 and has been available since 5.4.
+ Ideally all variants should adopt the new driver; however, during the
+ transition phase, coreboot must support both drivers. By selecting this
+ option, coreboot's SX9324 driver will specify all properties to work with
+ both Linux kernel drivers.
diff --git a/src/drivers/i2c/sx9324/chip.h b/src/drivers/i2c/sx9324/chip.h
index 9c9dd3cf35..47910fb7a0 100644
--- a/src/drivers/i2c/sx9324/chip.h
+++ b/src/drivers/i2c/sx9324/chip.h
@@ -23,7 +23,148 @@ struct drivers_i2c_sx9324_config {
/* IO-APIC interrupt */
struct acpi_irq irq;
+
+ /*
+ semtech,ph0-pin:
+ description: |
+ Array of 3 entries. Index represent the id of the CS pin.
+ Value indicates how each CS pin is used during phase 0.
+ Each of the 3 pins have the following value -
+ 0 : unused (high impedance)
+ 1 : measured input
+ 2 : dynamic shield
+ 3 : grounded.
+ For instance, CS0 measured, CS1 shield and CS2 ground is [1, 2, 3]
+ items:
+ enum: [ 0, 1, 2, 3 ]
+ minItems: 3
+ maxItems: 3
+ */
+ uint64_t ph0_pin[3];
+
+ /*
+ semtech,ph1-pin:
+ Same as ph0-pin for phase 1.
+ */
+ uint64_t ph1_pin[3];
+
+ /*
+ semtech,ph2-pin:
+ Same as ph0-pin for phase 2.
+ */
+ uint64_t ph2_pin[3];
+
+ /*
+ semtech,ph3-pin:
+ Same as ph0-pin for phase 3.
+ */
+ uint64_t ph3_pin[3];
+
+ /*
+ semtech,ph01-resolution:
+ enum: [8, 16, 32, 64, 128, 256, 512, 1024]
+ description:
+ Capacitance measurement resolution. For phase 0 and 1.
+ Higher the number, higher the resolution.
+ default: 128
+ */
+ uint64_t ph01_resolution;
+
+ /*
+ semtech,ph23-resolution:
+ Same as ph01-resolution for phase 2 and 3.
+ */
+ uint64_t ph23_resolution;
+
+ /*
+ semtech,startup-sensor:
+ enum: [0, 1, 2, 3]
+ default: 0
+ description: |
+ Phase used for start-up proximity detection.
+ It is used when we enable a phase to remove static offset and measure
+ only capacitance changes introduced by the user.
+ */
+ uint64_t startup_sensor;
+
+ /*
+ semtech,ph01-proxraw-strength:
+ minimum: 0
+ maximum: 7
+ default: 1
+ description:
+ PROXRAW filter strength for phase 0 and 1. A value of 0 represents off,
+ and other values represent 1-1/2^N.
+ */
+ uint64_t ph01_proxraw_strength;
+
+ /*
+ semtech,ph23-proxraw-strength:
+ Same as proxraw-strength01, for phase 2 and 3.
+ */
+ uint64_t ph23_proxraw_strength;
+
+ /*
+ semtech,avg-pos-strength:
+ enum: [0, 16, 64, 128, 256, 512, 1024, 4294967295]
+ default: 16
+ description: |
+ Average positive filter strength. A value of 0 represents off and
+ UINT_MAX (4294967295) represents infinite. Other values
+ represent 1-1/N.
+ */
+ uint64_t avg_pos_strength;
+
+ /*
+ semtech,cs-idle-sleep:
+ description:
+ State of CS pins during sleep mode and idle time.
+ enum:
+ - hi-z
+ - gnd
+ - vdd
+ */
+ const char *cs_idle_sleep;
+
+ /*
+ semtech,int-comp-resistor:
+ description:
+ Internal resistor setting for compensation.
+ enum:
+ - lowest
+ - low
+ - high
+ - highest
+ */
+ const char *int_comp_resistor;
+
+ /*
+ semtech,input-precharge-resistor-ohms:
+ default: 4000
+ multipleOf: 2000
+ minimum: 0
+ maximum: 30000
+ description:
+ Pre-charge input resistance in Ohm.
+ */
+ uint64_t input_precharge_resistor_ohms;
+
+ /*
+ semtech,input-analog-gain:
+ minimum: 0
+ maximum: 3
+ description: |
+ Defines the input antenna analog gain
+ 0: x1.247
+ 1: x1 (default)
+ 2: x0.768
+ 3: x0.552
+ */
+ uint64_t input_analog_gain;
+
+#if CONFIG(DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER)
#include "registers.h"
+#endif
};
#undef REGISTER
diff --git a/src/drivers/i2c/sx9324/registers.h b/src/drivers/i2c/sx9324/registers.h
index 2e22572949..2035463c40 100644
--- a/src/drivers/i2c/sx9324/registers.h
+++ b/src/drivers/i2c/sx9324/registers.h
@@ -4,6 +4,10 @@
#error "define REGISTER(NAME) before including this file"
#endif
+#if !CONFIG(DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER)
+#error "This file is only to support the legacy sx932x linux driver"
+#endif
+
REGISTER(reg_adv_ctrl0);
REGISTER(reg_adv_ctrl1);
REGISTER(reg_adv_ctrl2);
diff --git a/src/drivers/i2c/sx9324/sx9324.c b/src/drivers/i2c/sx9324/sx9324.c
index 2ca9f36345..367849144f 100644
--- a/src/drivers/i2c/sx9324/sx9324.c
+++ b/src/drivers/i2c/sx9324/sx9324.c
@@ -56,7 +56,23 @@ static void i2c_sx9324_fill_ssdt(const struct device *dev)
/* DSD */
dsd = acpi_dp_new_table("_DSD");
+ acpi_dp_add_integer_array(dsd, "semtech,ph0-pin", config->ph0_pin, ARRAY_SIZE(config->ph0_pin));
+ acpi_dp_add_integer_array(dsd, "semtech,ph1-pin", config->ph1_pin, ARRAY_SIZE(config->ph1_pin));
+ acpi_dp_add_integer_array(dsd, "semtech,ph2-pin", config->ph2_pin, ARRAY_SIZE(config->ph2_pin));
+ acpi_dp_add_integer_array(dsd, "semtech,ph3-pin", config->ph3_pin, ARRAY_SIZE(config->ph3_pin));
+ acpi_dp_add_integer(dsd, "semtech,ph01-resolution", config->ph01_resolution);
+ acpi_dp_add_integer(dsd, "semtech,ph23-resolution", config->ph23_resolution);
+ acpi_dp_add_integer(dsd, "semtech,startup-sensor", config->startup_sensor);
+ acpi_dp_add_integer(dsd, "semtech,ph01-proxraw-strength", config->ph01_proxraw_strength);
+ acpi_dp_add_integer(dsd, "semtech,ph23-proxraw-strength", config->ph23_proxraw_strength);
+ acpi_dp_add_integer(dsd, "semtech,avg-pos-strength", config->avg_pos_strength);
+ acpi_dp_add_integer(dsd, "semtech,input-precharge-resistor-ohms", config->input_precharge_resistor_ohms);
+ acpi_dp_add_integer(dsd, "semtech,input-analog-gain", config->input_analog_gain);
+ acpi_dp_add_string(dsd, "semtech,cs-idle-sleep", config->cs_idle_sleep);
+ acpi_dp_add_string(dsd, "semtech,int-comp-resistor", config->int_comp_resistor);
+#if CONFIG(DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER)
#include "registers.h"
+#endif
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device */
diff --git a/src/mainboard/google/brya/Kconfig.name b/src/mainboard/google/brya/Kconfig.name
index 4ead1f99e0..3c755c6895 100644
--- a/src/mainboard/google/brya/Kconfig.name
+++ b/src/mainboard/google/brya/Kconfig.name
@@ -40,6 +40,7 @@ config BOARD_GOOGLE_BRYA0
select SOC_INTEL_RAPTORLAKE
select DRIVERS_GENESYSLOGIC_GL9755
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select DRIVERS_INTEL_MIPI_CAMERA
select SOC_INTEL_COMMON_BLOCK_IPU
select SOC_INTEL_CRASHLOG
@@ -85,6 +86,7 @@ config BOARD_GOOGLE_NIVVIKS
select DRIVERS_GENERIC_GPIO_KEYS
select DRIVERS_GENESYSLOGIC_GL9750
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select DRIVERS_INTEL_MIPI_CAMERA
select HAVE_WWAN_POWER_SEQUENCE
@@ -139,6 +141,7 @@ config BOARD_GOOGLE_SKOLAS
select DRIVERS_GENESYSLOGIC_GL9755
select DRIVERS_INTEL_MIPI_CAMERA
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select SOC_INTEL_COMMON_BLOCK_IPU
config BOARD_GOOGLE_SKOLAS4ES
@@ -147,6 +150,7 @@ config BOARD_GOOGLE_SKOLAS4ES
select DRIVERS_GENESYSLOGIC_GL9755
select DRIVERS_INTEL_MIPI_CAMERA
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select SOC_INTEL_COMMON_BLOCK_IPU
config BOARD_GOOGLE_TAEKO
@@ -257,6 +261,7 @@ config BOARD_GOOGLE_PUJJO
select DRIVERS_GENERIC_GPIO_KEYS
select DRIVERS_GENESYSLOGIC_GL9750
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select HAVE_WWAN_POWER_SEQUENCE
config BOARD_GOOGLE_XIVU
diff --git a/src/mainboard/google/dedede/Kconfig.name b/src/mainboard/google/dedede/Kconfig.name
index 45cc1173ff..4f2fa04102 100644
--- a/src/mainboard/google/dedede/Kconfig.name
+++ b/src/mainboard/google/dedede/Kconfig.name
@@ -5,6 +5,7 @@ config BOARD_GOOGLE_BOTEN
select BOARD_GOOGLE_BASEBOARD_DEDEDE_CR50
select BASEBOARD_DEDEDE_LAPTOP
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select GEO_SAR_ENABLE if CHROMEOS_WIFI_SAR
config BOARD_GOOGLE_DEDEDE
@@ -108,6 +109,7 @@ config BOARD_GOOGLE_STORO
select BOARD_GOOGLE_BASEBOARD_DEDEDE_CR50
select BASEBOARD_DEDEDE_LAPTOP
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select DRIVERS_INTEL_MIPI_CAMERA
select SOC_INTEL_COMMON_BLOCK_IPU
select GEO_SAR_ENABLE if CHROMEOS_WIFI_SAR
@@ -124,6 +126,7 @@ config BOARD_GOOGLE_KRACKO
select BASEBOARD_DEDEDE_LAPTOP
select DRIVERS_GENERIC_MAX98357A
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select GEO_SAR_ENABLE if CHROMEOS_WIFI_SAR
config BOARD_GOOGLE_BLIPPER
@@ -177,6 +180,7 @@ config BOARD_GOOGLE_GOOEY
select BOARD_GOOGLE_BASEBOARD_DEDEDE_TPM2
select BASEBOARD_DEDEDE_LAPTOP
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
select GEO_SAR_ENABLE if CHROMEOS_WIFI_SAR
config BOARD_GOOGLE_BEADRIX
@@ -185,6 +189,7 @@ config BOARD_GOOGLE_BEADRIX
select BASEBOARD_DEDEDE_LAPTOP
select DRIVERS_GENERIC_MAX98357A
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
config BOARD_GOOGLE_SHOTZO
bool "-> Shotzo"
diff --git a/src/mainboard/google/zork/Kconfig.name b/src/mainboard/google/zork/Kconfig.name
index 7ba518a219..4e6cfc52c2 100644
--- a/src/mainboard/google/zork/Kconfig.name
+++ b/src/mainboard/google/zork/Kconfig.name
@@ -8,6 +8,7 @@ config BOARD_GOOGLE_VILBOZ
bool "-> Vilboz (Lenovo 100e/300e Gen3 AMD)"
select BOARD_GOOGLE_BASEBOARD_DALBOZ
select DRIVERS_I2C_SX9324
+ select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
config BOARD_GOOGLE_EZKINIL
bool "-> Ezkinil (Acer Chromebook Spin 514)"