[PATCH v5 09/23] soc: qcom: rpmh-rsc: adjust probe for U-Boot
Caleb Connolly
caleb.connolly at linaro.org
Thu Jul 11 18:46:41 CEST 2024
Rework the rpmh-rsc initialization to use U-Boot's driver model and
initialize cmd-db.
Acked-by: Sumit Garg <sumit.garg at linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly at linaro.org>
---
drivers/soc/qcom/rpmh-internal.h | 14 ++--
drivers/soc/qcom/rpmh-rsc.c | 143 +++++++++++++--------------------------
2 files changed, 50 insertions(+), 107 deletions(-)
diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h
index 12c5b8d9cf86..ac8f6c35a7a4 100644
--- a/drivers/soc/qcom/rpmh-internal.h
+++ b/drivers/soc/qcom/rpmh-internal.h
@@ -7,17 +7,18 @@
#ifndef __RPM_INTERNAL_H__
#define __RPM_INTERNAL_H__
#include <linux/bitmap.h>
-#include <linux/wait.h>
#include <soc/qcom/tcs.h>
#define TCS_TYPE_NR 4
#define MAX_CMDS_PER_TCS 16
#define MAX_TCS_PER_TYPE 3
#define MAX_TCS_NR (MAX_TCS_PER_TYPE * TCS_TYPE_NR)
#define MAX_TCS_SLOTS (MAX_CMDS_PER_TCS * MAX_TCS_PER_TYPE)
+#define USEC_PER_SEC 1000000UL
+
struct rsc_drv;
/**
* struct tcs_group: group of Trigger Command Sets (TCS) to send state requests
@@ -63,10 +64,9 @@ struct tcs_group {
*/
struct rpmh_request {
struct tcs_request msg;
struct tcs_cmd cmd[MAX_RPMH_PAYLOAD];
- struct completion *completion;
- const struct device *dev;
+ const struct udevice *dev;
bool needs_free;
};
/**
@@ -78,9 +78,8 @@ struct rpmh_request {
* @batch_cache: Cache sleep and wake requests sent as batch
*/
struct rpmh_ctrlr {
struct list_head cache;
- spinlock_t cache_lock;
bool dirty;
struct list_head batch_cache;
};
@@ -122,17 +121,12 @@ struct rsc_drv {
void __iomem *base;
void __iomem *tcs_base;
int id;
int num_tcs;
- struct notifier_block rsc_pm;
- struct notifier_block genpd_nb;
- atomic_t cpus_in_pm;
struct tcs_group tcs[TCS_TYPE_NR];
DECLARE_BITMAP(tcs_in_use, MAX_TCS_NR);
- spinlock_t lock;
- wait_queue_head_t tcs_wait;
struct rpmh_ctrlr client;
- struct device *dev;
+ struct udevice *dev;
struct rsc_ver ver;
u32 *regs;
};
diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index c09214552cfb..d4ef88dda184 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -386,20 +386,20 @@ int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg)
return 0;
}
-static int rpmh_probe_tcs_config(struct platform_device *pdev, struct rsc_drv *drv)
+static int rpmh_probe_tcs_config(struct udevice *dev, struct rsc_drv *drv)
{
struct tcs_type_config {
u32 type;
u32 n;
} tcs_cfg[TCS_TYPE_NR] = { { 0 } };
- struct device_node *dn = pdev->dev.of_node;
+ ofnode dn = dev_ofnode(dev);
u32 config, max_tcs, ncpt, offset;
int i, ret, n, st = 0;
struct tcs_group *tcs;
- ret = of_property_read_u32(dn, "qcom,tcs-offset", &offset);
+ ret = ofnode_read_u32(dn, "qcom,tcs-offset", &offset);
if (ret)
return ret;
drv->tcs_base = drv->base + offset;
@@ -411,24 +411,15 @@ static int rpmh_probe_tcs_config(struct platform_device *pdev, struct rsc_drv *d
ncpt = config & (DRV_NCPT_MASK << DRV_NCPT_SHIFT);
ncpt = ncpt >> DRV_NCPT_SHIFT;
- n = of_property_count_u32_elems(dn, "qcom,tcs-config");
- if (n != 2 * TCS_TYPE_NR)
- return -EINVAL;
+ n = ofnode_read_u32_array(dn, "qcom,tcs-config", (u32 *)tcs_cfg, 2 * TCS_TYPE_NR);
+ if (n < 0) {
+ log_err("RPMh: %s: error reading qcom,tcs-config %d\n", dev->name, n);
+ return n;
+ }
for (i = 0; i < TCS_TYPE_NR; i++) {
- ret = of_property_read_u32_index(dn, "qcom,tcs-config",
- i * 2, &tcs_cfg[i].type);
- if (ret)
- return ret;
- if (tcs_cfg[i].type >= TCS_TYPE_NR)
- return -EINVAL;
-
- ret = of_property_read_u32_index(dn, "qcom,tcs-config",
- i * 2 + 1, &tcs_cfg[i].n);
- if (ret)
- return ret;
if (tcs_cfg[i].n > MAX_TCS_PER_TYPE)
return -EINVAL;
}
@@ -457,43 +448,39 @@ static int rpmh_probe_tcs_config(struct platform_device *pdev, struct rsc_drv *d
return 0;
}
-static int rpmh_rsc_probe(struct platform_device *pdev)
+static int rpmh_rsc_bind(struct udevice *dev)
{
- struct device_node *dn = pdev->dev.of_node;
- struct rsc_drv *drv;
- char drv_id[10] = {0};
- int ret, irq;
- u32 solver_config;
- u32 rsc_id;
+ int ret;
- /*
- * Even though RPMh doesn't directly use cmd-db, all of its children
- * do. To avoid adding this check to our children we'll do it now.
- */
- ret = cmd_db_ready();
- if (ret) {
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev, "Command DB not available (%d)\n",
- ret);
- return ret;
- }
-
- drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
- if (!drv)
- return -ENOMEM;
-
- ret = of_property_read_u32(dn, "qcom,drv-id", &drv->id);
+ ret = cmd_db_init();
if (ret)
return ret;
- drv->name = of_get_property(dn, "label", NULL);
+ return 0;
+}
+
+static int rpmh_rsc_probe(struct udevice *dev)
+{
+ ofnode dn = dev_ofnode(dev);
+ struct rsc_drv *drv;
+ char drv_id[10] = {0};
+ int ret;
+ u32 rsc_id;
+
+ drv = dev_get_priv(dev);
+
+ ret = ofnode_read_u32(dn, "qcom,drv-id", &drv->id);
+ if (ret)
+ return ret;
+
+ drv->name = ofnode_get_property(dn, "label", NULL);
if (!drv->name)
- drv->name = dev_name(&pdev->dev);
+ drv->name = dev->name;
snprintf(drv_id, ARRAY_SIZE(drv_id), "drv-%d", drv->id);
- drv->base = devm_platform_ioremap_resource_byname(pdev, drv_id);
+ drv->base = (void __iomem *)dev_read_addr_name(dev, drv_id);
if (IS_ERR(drv->base))
return PTR_ERR(drv->base);
rsc_id = readl_relaxed(drv->base + RSC_DRV_ID);
@@ -506,84 +493,46 @@ static int rpmh_rsc_probe(struct platform_device *pdev)
drv->regs = rpmh_rsc_reg_offset_ver_3_0;
else
drv->regs = rpmh_rsc_reg_offset_ver_2_7;
- ret = rpmh_probe_tcs_config(pdev, drv);
+ ret = rpmh_probe_tcs_config(dev, drv);
if (ret)
return ret;
spin_lock_init(&drv->lock);
init_waitqueue_head(&drv->tcs_wait);
bitmap_zero(drv->tcs_in_use, MAX_TCS_NR);
- irq = platform_get_irq(pdev, drv->id);
- if (irq < 0)
- return irq;
-
- ret = devm_request_irq(&pdev->dev, irq, tcs_tx_done,
- IRQF_TRIGGER_HIGH | IRQF_NO_SUSPEND,
- drv->name, drv);
- if (ret)
- return ret;
-
- /*
- * CPU PM/genpd notification are not required for controllers that support
- * 'HW solver' mode where they can be in autonomous mode executing low
- * power mode to power down.
- */
- solver_config = readl_relaxed(drv->base + drv->regs[DRV_SOLVER_CONFIG]);
- solver_config &= DRV_HW_SOLVER_MASK << DRV_HW_SOLVER_SHIFT;
- solver_config = solver_config >> DRV_HW_SOLVER_SHIFT;
- if (!solver_config) {
- if (pdev->dev.pm_domain) {
- ret = rpmh_rsc_pd_attach(drv, &pdev->dev);
- if (ret)
- return ret;
- } else {
- drv->rsc_pm.notifier_call = rpmh_rsc_cpu_pm_callback;
- cpu_pm_register_notifier(&drv->rsc_pm);
- }
- }
-
/* Enable the active TCS to send requests immediately */
writel_relaxed(drv->tcs[ACTIVE_TCS].mask,
drv->tcs_base + drv->regs[RSC_DRV_IRQ_ENABLE]);
spin_lock_init(&drv->client.cache_lock);
INIT_LIST_HEAD(&drv->client.cache);
INIT_LIST_HEAD(&drv->client.batch_cache);
- dev_set_drvdata(&pdev->dev, drv);
- drv->dev = &pdev->dev;
+ dev_set_drvdata(dev, drv);
+ drv->dev = dev;
- ret = devm_of_platform_populate(&pdev->dev);
- if (ret && pdev->dev.pm_domain) {
- dev_pm_genpd_remove_notifier(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
- }
+ log_debug("RPMh: %s: v%d.%d\n", dev->name, drv->ver.major, drv->ver.minor);
return ret;
}
-static const struct of_device_id rpmh_drv_match[] = {
- { .compatible = "qcom,rpmh-rsc", },
+static const struct udevice_id qcom_rpmh_ids[] = {
+ { .compatible = "qcom,rpmh-rsc" },
{ }
};
-MODULE_DEVICE_TABLE(of, rpmh_drv_match);
-static struct platform_driver rpmh_driver = {
- .probe = rpmh_rsc_probe,
- .driver = {
- .name = "rpmh",
- .of_match_table = rpmh_drv_match,
- .suppress_bind_attrs = true,
- },
+U_BOOT_DRIVER(qcom_rpmh_rsc) = {
+ .name = "qcom_rpmh_rsc",
+ .id = UCLASS_MISC,
+ .priv_auto = sizeof(struct rsc_drv),
+ .probe = rpmh_rsc_probe,
+ .bind = rpmh_rsc_bind,
+ .of_match = qcom_rpmh_ids,
+ /* rpmh is under CLUSTER_PD which we don't support, so skip trying to enable PDs */
+ .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
};
-static int __init rpmh_driver_init(void)
-{
- return platform_driver_register(&rpmh_driver);
-}
-core_initcall(rpmh_driver_init);
-
MODULE_DESCRIPTION("Qualcomm Technologies, Inc. RPMh Driver");
MODULE_LICENSE("GPL v2");
--
2.45.2
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