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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: Hoan Tran <hotran@apm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
hotran 2017-10-17 11:28:34 -07:00 committed by Guenter Roeck
parent 534e28d876
commit 749d782d80
1 changed files with 31 additions and 9 deletions
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40
drivers/hwmon/xgene-hwmon.c
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@ -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"},
{}