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Commit d0748104 authored by Lina Iyer's avatar Lina Iyer
Browse files

drivers: qcom: Add standalone mode support for RPMH 



Allow RPMH requests to succeed even when the Always-On subsystem is not
available. In standalone mode, requests are never sent to the TCS
mailbox driver. The command DB provides the information to make the
decision to run in standalone mode or not.

Change-Id: Ia2bc5024da0d7e6607347b1a481b2feb9584059a
Signed-off-by: default avatarLina Iyer <ilina@codeaurora.org>
parent 446482f9

drivers/soc/qcom/rpmh-internal.h

+2 −0
Original line number Diff line number Diff line
@@ -110,6 +110,8 @@ struct rsc_drv { 
	int irq;

};



extern bool rpmh_standalone;



int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg);

int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv,

			     const struct tcs_request *msg);

drivers/soc/qcom/rpmh-rsc.c

+4 −0
Original line number Diff line number Diff line
@@ -66,6 +66,8 @@ 
#define RSC_PDC_DRV_DATA		0x38

#define RSC_PDC_DATA_OFFSET		0x08



bool rpmh_standalone;



static u32 read_tcs_reg(struct rsc_drv *drv, int reg, int tcs_id, int cmd_id)

{

	return readl_relaxed(drv->tcs_base + reg + RSC_DRV_TCS_OFFSET * tcs_id +
@@ -808,6 +810,8 @@ static int rpmh_rsc_probe(struct platform_device *pdev) 
		return ret;

	}



	rpmh_standalone = (cmd_db_is_standalone() == 1);



	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);

	if (!drv)

		return -ENOMEM;

drivers/soc/qcom/rpmh.c

+18 −0
Original line number Diff line number Diff line
@@ -279,6 +279,9 @@ int rpmh_write_async(const struct device *dev, enum rpmh_state state, 
	struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);

	int ret;



	if (rpmh_standalone)

		return 0;



	ret = check_ctrlr_state(ctrlr, state);

	if (ret)

		return ret;
@@ -319,6 +322,9 @@ int rpmh_write(const struct device *dev, enum rpmh_state state, 
	if (!cmd || !n || n > MAX_RPMH_PAYLOAD)

		return -EINVAL;



	if (rpmh_standalone)

		return 0;



	ret = check_ctrlr_state(ctrlr, state);

	if (ret)

		return ret;
@@ -416,6 +422,9 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state, 
	if (!cmd || !n)

		return -EINVAL;



	if (rpmh_standalone)

		return 0;



	ret = check_ctrlr_state(ctrlr, state);

	if (ret)

		return ret;
@@ -496,6 +505,9 @@ int rpmh_write_pdc_data(const struct device *dev, 
	if (!n || n > MAX_RPMH_PAYLOAD)

		return -EINVAL;



	if (rpmh_standalone)

		return 0;



	memcpy(rpm_msg.cmd, cmd, n * sizeof(*cmd));

	rpm_msg.msg.num_cmds = n;

	rpm_msg.msg.wait_for_compl = false;
@@ -544,6 +556,9 @@ int rpmh_flush(const struct device *dev) 
	struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);

	int ret;



	if (rpmh_standalone)

		return 0;



	if (!ctrlr->dirty) {

		pr_debug("Skipping flush, TCS has latest data.\n");

		return 0;
@@ -592,6 +607,9 @@ int rpmh_invalidate(const struct device *dev) 
	struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);

	int ret;



	if (rpmh_standalone)

		return 0;



	invalidate_batch(ctrlr);

	ctrlr->dirty = true;