[PATCH v2 1/1] i2c: designware: Add ACPI ID MSFT0006 for Microsoft Cobalt SoCs

[PATCH v2 1/1] i2c: designware: Add ACPI ID MSFT0006 for Microsoft Cobalt SoCs

[Siddharth Chintamaneni]

Add the MSFT0006 ACPI ID for the DesignWare I2C controller integrated
on Microsoft Cobalt SoCs, along with its 300 MHz input clock description
in acpi_apd.c.

Without an explicit MSFT0006 entry, ACPI device matching falls back to
its _CID (APMC0D0F), which configures a 100 MHz input clock instead of
the controller's actual 300 MHz clock.

Acked-by: Jarred White <jarredwhite@linux.microsoft.com>
Acked-by: Jeff Kirsher <jeff.kirsher@microsoft.com>
Signed-off-by: Siddharth Chintamaneni <sidchintamaneni@gmail.com>
---
 drivers/acpi/acpi_apd.c                     | 6 ++++++
 drivers/i2c/busses/i2c-designware-platdrv.c | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index ea226fd987567..66a7607752d9b 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -198,6 +198,11 @@ static const struct apd_device_desc hjmc_i2c_desc = {
 	.fixed_clk_rate = 200 * HZ_PER_MHZ,
 };
 
+static const struct apd_device_desc msft_i2c_desc = {
+	.setup = acpi_apd_setup,
+	.fixed_clk_rate = 300 * HZ_PER_MHZ,
+};
+
 #endif /* CONFIG_ARM64 */
 
 #endif
@@ -272,6 +277,7 @@ static const struct acpi_device_id acpi_apd_device_ids[] = {
 	{ "HJMC3001", APD_ADDR(hjmc_i2c_desc) },
 	{ "LECA0002", APD_ADDR(leca_spi_desc) },
 	{ "LECA0003", APD_ADDR(leca_i2c_desc) },
+	{ "MSFT0006", APD_ADDR(msft_i2c_desc) },
 	{ "NXP0001", APD_ADDR(nxp_i2c_desc) },
 #endif
 	{ }
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 13dd7c50486a4..cf364f3c26199 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -280,6 +280,7 @@ static const struct acpi_device_id dw_i2c_acpi_match[] = {
 	{ .id = "INT3433" },
 	{ .id = "INTC10EF" },
 	{ .id = "LECA0003" },
+	{ .id = "MSFT0006" },
 	{ }
 };
 MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match);
-- 
2.45.4