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SubjectRe: [2/2] hwmon: xgene: Support PCC shared memory in IO region
On Thu, Sep 21, 2017 at 10:17:10AM -0700, hotran wrote:
> As the PCC shared memory could be in IO region which doesn't
> support caching, this patch simply uses ioremap() for IO region.
>
> Signed-off-by: Hoan Tran <hotran@apm.com>

Applied to hwmon-next.

Thanks,
Guenter

> ---
> drivers/hwmon/xgene-hwmon.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hwmon/xgene-hwmon.c b/drivers/hwmon/xgene-hwmon.c
> index 5cd327e..2dac1ed 100644
> --- a/drivers/hwmon/xgene-hwmon.c
> +++ b/drivers/hwmon/xgene-hwmon.c
> @@ -32,6 +32,7 @@
> #include <linux/kfifo.h>
> #include <linux/mailbox_controller.h>
> #include <linux/mailbox_client.h>
> +#include <linux/memblock.h>
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/platform_device.h>
> @@ -135,6 +136,14 @@ static u16 xgene_word_tst_and_clr(u16 *addr, u16 mask)
> return ret;
> }
>
> +static void __iomem *pcc_ioremap(phys_addr_t phys, size_t size)
> +{
> + if (!memblock_is_memory(phys))
> + return ioremap(phys, size);
> +
> + return memremap(phys, size, MEMREMAP_WB);
> +}
> +
> static int xgene_hwmon_pcc_rd(struct xgene_hwmon_dev *ctx, u32 *msg)
> {
> struct acpi_pcct_shared_memory *generic_comm_base = ctx->pcc_comm_addr;
> @@ -690,9 +699,8 @@ 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,
> - cppc_ss->length,
> - MEMREMAP_WB);
> + ctx->pcc_comm_addr = pcc_ioremap(ctx->comm_base_addr,
> + cppc_ss->length);
> } else {
> dev_err(&pdev->dev, "Failed to get PCC comm region\n");
> rc = -ENODEV;

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