linux-kernel - [RFC PATCH 1/1] ACPI / PMIC: Add i2c address to intel_pmic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 18 Oct 2021 01:15:23 +0900
From:   Tsuchiya Yuto <kitakar@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Tsuchiya Yuto <kitakar@...il.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, Andy Shevchenko <andy@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 1/1] ACPI / PMIC: Add i2c address to intel_pmic_bytcrc driver

On Microsoft Surface 3 (uses Intel's Atom Cherry Trail SoC), executing
intel_soc_pmic_exec_mipi_pmic_seq_element() results in the following
error message:

        [ 7196.356682] intel_soc_pmic_exec_mipi_pmic_seq_element: Not implemented
        [ 7196.356686] intel_soc_pmic_exec_mipi_pmic_seq_element: i2c-addr: 0x6e reg-addr 0x57 value 0x63 mask 0xff

Surface 3 uses the PMIC device INT33FD, and the DSDT describes its _HRV
value is 0x02 [1]:

        Scope (PCI0.I2C7)
        {
            Device (PMIC)
            {
                Name (_ADR, Zero)  // _ADR: Address
                Name (_HID, "INT33FD" /* Intel Baytrail Power Management IC */)  // _HID: Hardware ID
                Name (_CID, "INT33FD" /* Intel Baytrail Power Management IC */)  // _CID: Compatible ID
                Name (_DDN, "CRYSTAL COVE+ AIC")  // _DDN: DOS Device Name
                Name (_HRV, 0x02)  // _HRV: Hardware Revision
                Name (_UID, One)  // _UID: Unique ID
                Name (_DEP, Package (0x01)  // _DEP: Dependencies
                {
                    I2C7
                })
        [...]

Due to this _HRV value, intel_pmic_bytcrc is used as the PMIC driver.
However, the i2c address is currently not defined in this driver.
This commit adds the missing i2c address 0x6e to the intel_pmic_bytcrc
driver.

[1] https://github.com/linux-surface/acpidumps/blob/f8db3d150815aa21530635b7e646eee271e3b8fe/surface_3/dsdt.dsl#L10868

References: cc0594c4b0ef ("ACPI / PMIC: Add i2c address for thermal control")
Signed-off-by: Tsuchiya Yuto <kitakar@...il.com>
---
 drivers/acpi/pmic/intel_pmic_bytcrc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/pmic/intel_pmic_bytcrc.c b/drivers/acpi/pmic/intel_pmic_bytcrc.c
index 2a692cc4b7ae..a64f50a42c54 100644
--- a/drivers/acpi/pmic/intel_pmic_bytcrc.c
+++ b/drivers/acpi/pmic/intel_pmic_bytcrc.c
@@ -282,6 +282,7 @@ static struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = {
 	.power_table_count= ARRAY_SIZE(power_table),
 	.thermal_table	= thermal_table,
 	.thermal_table_count = ARRAY_SIZE(thermal_table),
+	.pmic_i2c_address = 0x6e,
 };
 
 static int intel_crc_pmic_opregion_probe(struct platform_device *pdev)
-- 
2.33.1