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i2c: xgene-slimpro: Support v2 

This patch supports xgene-slimpro-i2c v2 which uses the non-cachable memory
as the PCC shared memory.

Signed-off-by: Hoan Tran <hotran@apm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
hifive-unleashed-5.1
Hoan Tran 2017-10-30 15:24:16 -07:00 committed by Wolfram Sang
parent af3366753f
commit da24b8240f
1 changed files with 26 additions and 4 deletions
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30
drivers/i2c/busses/i2c-xgene-slimpro.c
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@ -129,6 +129,11 @@ struct slimpro_i2c_dev {
#define to_slimpro_i2c_dev(cl) \
container_of(cl, struct slimpro_i2c_dev, mbox_client)
enum slimpro_i2c_version {
XGENE_SLIMPRO_I2C_V1 = 0,
XGENE_SLIMPRO_I2C_V2 = 1,
};
/*
* This function tests and clears a bitmask then returns its old value
*/
@ -476,6 +481,15 @@ static int xgene_slimpro_i2c_probe(struct platform_device *pdev)
}
} else {
struct acpi_pcct_hw_reduced *cppc_ss;
const struct acpi_device_id *acpi_id;
int version = XGENE_SLIMPRO_I2C_V1;
acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table,
&pdev->dev);
if (!acpi_id)
return -EINVAL;
version = (int)acpi_id->driver_data;
if (device_property_read_u32(&pdev->dev, "pcc-channel",
&ctx->mbox_idx))
@ -514,9 +528,16 @@ static int xgene_slimpro_i2c_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,
cppc_ss->length,
MEMREMAP_WB);
if (version == XGENE_SLIMPRO_I2C_V2)
ctx->pcc_comm_addr = memremap(
ctx->comm_base_addr,
cppc_ss->length,
MEMREMAP_WT);
else
ctx->pcc_comm_addr = memremap(
ctx->comm_base_addr,
cppc_ss->length,
MEMREMAP_WB);
} else {
dev_err(&pdev->dev, "Failed to get PCC comm region\n");
rc = -ENOENT;
@ -581,7 +602,8 @@ MODULE_DEVICE_TABLE(of, xgene_slimpro_i2c_dt_ids);
#ifdef CONFIG_ACPI
static const struct acpi_device_id xgene_slimpro_i2c_acpi_ids[] = {
{"APMC0D40", 0},
{"APMC0D40", XGENE_SLIMPRO_I2C_V1},
{"APMC0D8B", XGENE_SLIMPRO_I2C_V2},
{}
};
MODULE_DEVICE_TABLE(acpi, xgene_slimpro_i2c_acpi_ids);