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Commit 749d782d authored by hotran's avatar hotran Committed by Guenter Roeck
Browse files

hwmon: (xgene) Support hwmon v2 



This patch supports xgene-hwmon v2 which uses the non-cachable memory
as the PCC shared memory.

Signed-off-by: default avatarHoan Tran <hotran@apm.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 534e28d8

drivers/hwmon/xgene-hwmon.c

+31 −9
Original line number Diff line number Diff line
@@ -91,6 +91,11 @@ 
#define to_xgene_hwmon_dev(cl)		\

	container_of(cl, struct xgene_hwmon_dev, mbox_client)



enum xgene_hwmon_version {

	XGENE_HWMON_V1 = 0,

	XGENE_HWMON_V2 = 1,

};



struct slimpro_resp_msg {

	u32 msg;

	u32 param1;
@@ -609,6 +614,15 @@ static void xgene_hwmon_tx_done(struct mbox_client *cl, void *msg, int ret) 
	}

}



#ifdef CONFIG_ACPI

static const struct acpi_device_id xgene_hwmon_acpi_match[] = {

	{"APMC0D29", XGENE_HWMON_V1},

	{"APMC0D8A", XGENE_HWMON_V2},

	{},

};

MODULE_DEVICE_TABLE(acpi, xgene_hwmon_acpi_match);

#endif



static int xgene_hwmon_probe(struct platform_device *pdev)

{

	struct xgene_hwmon_dev *ctx;
@@ -651,6 +665,16 @@ static int xgene_hwmon_probe(struct platform_device *pdev) 
		}

	} else {

		struct acpi_pcct_hw_reduced *cppc_ss;

		int version = XGENE_HWMON_V1;

#ifdef CONFIG_ACPI

		const struct acpi_device_id *acpi_id;



		acpi_id = acpi_match_device(xgene_hwmon_acpi_match, &pdev->dev);

		if (!acpi_id)

			return -EINVAL;



		version = (int)acpi_id->driver_data;

#endif



		if (device_property_read_u32(&pdev->dev, "pcc-channel",

					     &ctx->mbox_idx)) {
@@ -693,7 +717,13 @@ static int xgene_hwmon_probe(struct platform_device *pdev) 
		 */

		ctx->comm_base_addr = cppc_ss->base_address;

		if (ctx->comm_base_addr) {

			ctx->pcc_comm_addr = memremap(ctx->comm_base_addr,

			if (version == XGENE_HWMON_V2)

				ctx->pcc_comm_addr = (void __force *)ioremap(

							ctx->comm_base_addr,

							cppc_ss->length);

			else

				ctx->pcc_comm_addr = memremap(

							ctx->comm_base_addr,

							cppc_ss->length,

							MEMREMAP_WB);

		} else {
@@ -761,14 +791,6 @@ static int xgene_hwmon_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_ACPI

static const struct acpi_device_id xgene_hwmon_acpi_match[] = {

	{"APMC0D29", 0},

	{},

};

MODULE_DEVICE_TABLE(acpi, xgene_hwmon_acpi_match);

#endif



static const struct of_device_id xgene_hwmon_of_match[] = {

	{.compatible = "apm,xgene-slimpro-hwmon"},

	{}