soc: tegra: Move powergate-bpmp driver to the genpd dir

To simplify with maintenance let's move the powergate-bpmp driver to the
new genpd directory. Going forward, patches are intended to be managed
through a separate git tree, according to MAINTAINERS.

Note that, we leave the pmc driver in the soc directory for now, as it
looks like it may need some re-structuring before it's ready to be moved.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Mikko Perttunen <mperttunen@nvidia.com>
Cc: <linux-tegra@vger.kernel.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

2 files changed, 0 insertions, 362 deletions

diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile
index d722f512dc9d..01059619e764 100644
--- a/drivers/soc/tegra/Makefile
+++ b/drivers/soc/tegra/Makefile
@@ -5,7 +5,6 @@ obj-y += cbb/
 obj-y += common.o
 obj-$(CONFIG_SOC_TEGRA_FLOWCTRL) += flowctrl.o
 obj-$(CONFIG_SOC_TEGRA_PMC) += pmc.o
-obj-$(CONFIG_SOC_TEGRA_POWERGATE_BPMP) += powergate-bpmp.o
 obj-$(CONFIG_SOC_TEGRA20_VOLTAGE_COUPLER) += regulators-tegra20.o
 obj-$(CONFIG_SOC_TEGRA30_VOLTAGE_COUPLER) += regulators-tegra30.o
 obj-$(CONFIG_ARCH_TEGRA_186_SOC) += ari-tegra186.o
diff --git a/drivers/soc/tegra/powergate-bpmp.c b/drivers/soc/tegra/powergate-bpmp.c
deleted file mode 100644
index 179ed895c279..000000000000
--- a/drivers/soc/tegra/powergate-bpmp.c
+++ /dev/null
@@ -1,361 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved
- */
-
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/pm_domain.h>
-#include <linux/slab.h>
-
-#include <soc/tegra/bpmp.h>
-#include <soc/tegra/bpmp-abi.h>
-
-struct tegra_powergate_info {
-	unsigned int id;
-	char *name;
-};
-
-struct tegra_powergate {
-	struct generic_pm_domain genpd;
-	struct tegra_bpmp *bpmp;
-	unsigned int id;
-};
-
-static inline struct tegra_powergate *
-to_tegra_powergate(struct generic_pm_domain *genpd)
-{
-	return container_of(genpd, struct tegra_powergate, genpd);
-}
-
-static int tegra_bpmp_powergate_set_state(struct tegra_bpmp *bpmp,
-					  unsigned int id, u32 state)
-{
-	struct mrq_pg_request request;
-	struct tegra_bpmp_message msg;
-	int err;
-
-	memset(&request, 0, sizeof(request));
-	request.cmd = CMD_PG_SET_STATE;
-	request.id = id;
-	request.set_state.state = state;
-
-	memset(&msg, 0, sizeof(msg));
-	msg.mrq = MRQ_PG;
-	msg.tx.data = &request;
-	msg.tx.size = sizeof(request);
-
-	err = tegra_bpmp_transfer(bpmp, &msg);
-	if (err < 0)
-		return err;
-	else if (msg.rx.ret < 0)
-		return -EINVAL;
-
-	return 0;
-}
-
-static int tegra_bpmp_powergate_get_state(struct tegra_bpmp *bpmp,
-					  unsigned int id)
-{
-	struct mrq_pg_response response;
-	struct mrq_pg_request request;
-	struct tegra_bpmp_message msg;
-	int err;
-
-	memset(&request, 0, sizeof(request));
-	request.cmd = CMD_PG_GET_STATE;
-	request.id = id;
-
-	memset(&response, 0, sizeof(response));
-
-	memset(&msg, 0, sizeof(msg));
-	msg.mrq = MRQ_PG;
-	msg.tx.data = &request;
-	msg.tx.size = sizeof(request);
-	msg.rx.data = &response;
-	msg.rx.size = sizeof(response);
-
-	err = tegra_bpmp_transfer(bpmp, &msg);
-	if (err < 0)
-		return PG_STATE_OFF;
-	else if (msg.rx.ret < 0)
-		return -EINVAL;
-
-	return response.get_state.state;
-}
-
-static int tegra_bpmp_powergate_get_max_id(struct tegra_bpmp *bpmp)
-{
-	struct mrq_pg_response response;
-	struct mrq_pg_request request;
-	struct tegra_bpmp_message msg;
-	int err;
-
-	memset(&request, 0, sizeof(request));
-	request.cmd = CMD_PG_GET_MAX_ID;
-
-	memset(&response, 0, sizeof(response));
-
-	memset(&msg, 0, sizeof(msg));
-	msg.mrq = MRQ_PG;
-	msg.tx.data = &request;
-	msg.tx.size = sizeof(request);
-	msg.rx.data = &response;
-	msg.rx.size = sizeof(response);
-
-	err = tegra_bpmp_transfer(bpmp, &msg);
-	if (err < 0)
-		return err;
-	else if (msg.rx.ret < 0)
-		return -EINVAL;
-
-	return response.get_max_id.max_id;
-}
-
-static char *tegra_bpmp_powergate_get_name(struct tegra_bpmp *bpmp,
-					   unsigned int id)
-{
-	struct mrq_pg_response response;
-	struct mrq_pg_request request;
-	struct tegra_bpmp_message msg;
-	int err;
-
-	memset(&request, 0, sizeof(request));
-	request.cmd = CMD_PG_GET_NAME;
-	request.id = id;
-
-	memset(&response, 0, sizeof(response));
-
-	memset(&msg, 0, sizeof(msg));
-	msg.mrq = MRQ_PG;
-	msg.tx.data = &request;
-	msg.tx.size = sizeof(request);
-	msg.rx.data = &response;
-	msg.rx.size = sizeof(response);
-
-	err = tegra_bpmp_transfer(bpmp, &msg);
-	if (err < 0 || msg.rx.ret < 0)
-		return NULL;
-
-	return kstrdup(response.get_name.name, GFP_KERNEL);
-}
-
-static inline bool tegra_bpmp_powergate_is_powered(struct tegra_bpmp *bpmp,
-						   unsigned int id)
-{
-	return tegra_bpmp_powergate_get_state(bpmp, id) != PG_STATE_OFF;
-}
-
-static int tegra_powergate_power_on(struct generic_pm_domain *domain)
-{
-	struct tegra_powergate *powergate = to_tegra_powergate(domain);
-	struct tegra_bpmp *bpmp = powergate->bpmp;
-
-	return tegra_bpmp_powergate_set_state(bpmp, powergate->id,
-					      PG_STATE_ON);
-}
-
-static int tegra_powergate_power_off(struct generic_pm_domain *domain)
-{
-	struct tegra_powergate *powergate = to_tegra_powergate(domain);
-	struct tegra_bpmp *bpmp = powergate->bpmp;
-
-	return tegra_bpmp_powergate_set_state(bpmp, powergate->id,
-					      PG_STATE_OFF);
-}
-
-static struct tegra_powergate *
-tegra_powergate_add(struct tegra_bpmp *bpmp,
-		    const struct tegra_powergate_info *info)
-{
-	struct tegra_powergate *powergate;
-	bool off;
-	int err;
-
-	off = !tegra_bpmp_powergate_is_powered(bpmp, info->id);
-
-	powergate = devm_kzalloc(bpmp->dev, sizeof(*powergate), GFP_KERNEL);
-	if (!powergate)
-		return ERR_PTR(-ENOMEM);
-
-	powergate->id = info->id;
-	powergate->bpmp = bpmp;
-
-	powergate->genpd.name = kstrdup(info->name, GFP_KERNEL);
-	powergate->genpd.power_on = tegra_powergate_power_on;
-	powergate->genpd.power_off = tegra_powergate_power_off;
-
-	err = pm_genpd_init(&powergate->genpd, NULL, off);
-	if (err < 0) {
-		kfree(powergate->genpd.name);
-		return ERR_PTR(err);
-	}
-
-	return powergate;
-}
-
-static void tegra_powergate_remove(struct tegra_powergate *powergate)
-{
-	struct generic_pm_domain *genpd = &powergate->genpd;
-	struct tegra_bpmp *bpmp = powergate->bpmp;
-	int err;
-
-	err = pm_genpd_remove(genpd);
-	if (err < 0)
-		dev_err(bpmp->dev, "failed to remove power domain %s: %d\n",
-			genpd->name, err);
-
-	kfree(genpd->name);
-}
-
-static int
-tegra_bpmp_probe_powergates(struct tegra_bpmp *bpmp,
-			    struct tegra_powergate_info **powergatesp)
-{
-	struct tegra_powergate_info *powergates;
-	unsigned int max_id, id, count = 0;
-	unsigned int num_holes = 0;
-	int err;
-
-	err = tegra_bpmp_powergate_get_max_id(bpmp);
-	if (err < 0)
-		return err;
-
-	max_id = err;
-
-	dev_dbg(bpmp->dev, "maximum powergate ID: %u\n", max_id);
-
-	powergates = kcalloc(max_id + 1, sizeof(*powergates), GFP_KERNEL);
-	if (!powergates)
-		return -ENOMEM;
-
-	for (id = 0; id <= max_id; id++) {
-		struct tegra_powergate_info *info = &powergates[count];
-
-		info->name = tegra_bpmp_powergate_get_name(bpmp, id);
-		if (!info->name || info->name[0] == '\0') {
-			num_holes++;
-			continue;
-		}
-
-		info->id = id;
-		count++;
-	}
-
-	dev_dbg(bpmp->dev, "holes: %u\n", num_holes);
-
-	*powergatesp = powergates;
-
-	return count;
-}
-
-static int tegra_bpmp_add_powergates(struct tegra_bpmp *bpmp,
-				     struct tegra_powergate_info *powergates,
-				     unsigned int count)
-{
-	struct genpd_onecell_data *genpd = &bpmp->genpd;
-	struct generic_pm_domain **domains;
-	struct tegra_powergate *powergate;
-	unsigned int i;
-	int err;
-
-	domains = kcalloc(count, sizeof(*domains), GFP_KERNEL);
-	if (!domains)
-		return -ENOMEM;
-
-	for (i = 0; i < count; i++) {
-		powergate = tegra_powergate_add(bpmp, &powergates[i]);
-		if (IS_ERR(powergate)) {
-			err = PTR_ERR(powergate);
-			goto remove;
-		}
-
-		dev_dbg(bpmp->dev, "added power domain %s\n",
-			powergate->genpd.name);
-		domains[i] = &powergate->genpd;
-	}
-
-	genpd->num_domains = count;
-	genpd->domains = domains;
-
-	return 0;
-
-remove:
-	while (i--) {
-		powergate = to_tegra_powergate(domains[i]);
-		tegra_powergate_remove(powergate);
-	}
-
-	kfree(domains);
-	return err;
-}
-
-static void tegra_bpmp_remove_powergates(struct tegra_bpmp *bpmp)
-{
-	struct genpd_onecell_data *genpd = &bpmp->genpd;
-	unsigned int i = genpd->num_domains;
-	struct tegra_powergate *powergate;
-
-	while (i--) {
-		dev_dbg(bpmp->dev, "removing power domain %s\n",
-			genpd->domains[i]->name);
-		powergate = to_tegra_powergate(genpd->domains[i]);
-		tegra_powergate_remove(powergate);
-	}
-}
-
-static struct generic_pm_domain *
-tegra_powergate_xlate(struct of_phandle_args *spec, void *data)
-{
-	struct generic_pm_domain *domain = ERR_PTR(-ENOENT);
-	struct genpd_onecell_data *genpd = data;
-	unsigned int i;
-
-	for (i = 0; i < genpd->num_domains; i++) {
-		struct tegra_powergate *powergate;
-
-		powergate = to_tegra_powergate(genpd->domains[i]);
-		if (powergate->id == spec->args[0]) {
-			domain = &powergate->genpd;
-			break;
-		}
-	}
-
-	return domain;
-}
-
-int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
-{
-	struct device_node *np = bpmp->dev->of_node;
-	struct tegra_powergate_info *powergates;
-	struct device *dev = bpmp->dev;
-	unsigned int count, i;
-	int err;
-
-	err = tegra_bpmp_probe_powergates(bpmp, &powergates);
-	if (err < 0)
-		return err;
-
-	count = err;
-
-	dev_dbg(dev, "%u power domains probed\n", count);
-
-	err = tegra_bpmp_add_powergates(bpmp, powergates, count);
-	if (err < 0)
-		goto free;
-
-	bpmp->genpd.xlate = tegra_powergate_xlate;
-
-	err = of_genpd_add_provider_onecell(np, &bpmp->genpd);
-	if (err < 0) {
-		dev_err(dev, "failed to add power domain provider: %d\n", err);
-		tegra_bpmp_remove_powergates(bpmp);
-	}
-
-free:
-	for (i = 0; i < count; i++)
-		kfree(powergates[i].name);
-
-	kfree(powergates);
-	return err;
-}