[PATCH v1 2/2] drivers: qcom: rpmh: write PDC data
From: Raju P.L.S.S.S.N
Date: Wed Oct 03 2018 - 05:56:58 EST
From: Lina Iyer <ilina@xxxxxxxxxxxxxx>
The Power Domain Controller can be programmed to wakeup the RSC and
setup the resources back in the active state, before the processor is
woken up by a timer interrupt. The wakeup value from the timer hardware
can be copied to the PDC which has its own timer and is in an always-on
power domain. Programming the wakeup value is done through a separate
register on the RSC.
Signed-off-by: Lina Iyer <ilina@xxxxxxxxxxxxxx>
Signed-off-by: Raju P.L.S.S.S.N <rplsssn@xxxxxxxxxxxxxx>
Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
---
drivers/soc/qcom/rpmh-internal.h | 4 +++-
drivers/soc/qcom/rpmh-rsc.c | 35 +++++++++++++++++++++++++++++------
drivers/soc/qcom/rpmh.c | 28 ++++++++++++++++++++++++++++
include/soc/qcom/rpmh.h | 7 +++++++
4 files changed, 67 insertions(+), 7 deletions(-)
diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h
index a7bbbb6..8c316b4 100644
--- a/drivers/soc/qcom/rpmh-internal.h
+++ b/drivers/soc/qcom/rpmh-internal.h
@@ -85,6 +85,7 @@ struct rpmh_ctrlr {
* Resource State Coordinator controller (RSC)
*
* @name: controller identifier
+ * @base: start address of the RSC's DRV registers
* @tcs_base: start address of the TCS registers in this controller
* @id: instance id in the controller (Direct Resource Voter)
* @num_tcs: number of TCSes in this DRV
@@ -95,6 +96,7 @@ struct rpmh_ctrlr {
*/
struct rsc_drv {
const char *name;
+ void __iomem *base;
void __iomem *tcs_base;
int id;
int num_tcs;
@@ -108,7 +110,7 @@ struct rsc_drv {
int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv,
const struct tcs_request *msg);
int rpmh_rsc_invalidate(struct rsc_drv *drv);
-
+int rpmh_rsc_write_pdc_data(struct rsc_drv *drv, const struct tcs_request *msg);
void rpmh_tx_done(const struct tcs_request *msg, int r);
#endif /* __RPM_INTERNAL_H__ */
diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 6cc7f21..73d5b98 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -61,6 +61,11 @@
#define CMD_STATUS_ISSUED BIT(8)
#define CMD_STATUS_COMPL BIT(16)
+/* PDC wakeup */
+#define RSC_PDC_DATA_SIZE 2
+#define RSC_PDC_DRV_DATA 0x38
+#define RSC_PDC_DATA_OFFSET 0x08
+
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 +
@@ -552,6 +557,25 @@ int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv, const struct tcs_request *msg)
return tcs_ctrl_write(drv, msg);
}
+int rpmh_rsc_write_pdc_data(struct rsc_drv *drv, const struct tcs_request *msg)
+{
+ int i;
+ void __iomem *addr = drv->base + RSC_PDC_DRV_DATA;
+
+ if (!msg || !msg->cmds || msg->num_cmds != RSC_PDC_DATA_SIZE)
+ return -EINVAL;
+
+ for (i = 0; i < msg->num_cmds; i++) {
+ /* Only data is write capable */
+ writel_relaxed(msg->cmds[i].data, addr);
+ trace_rpmh_send_msg(drv, RSC_PDC_DRV_DATA, i, 0,
+ &msg->cmds[i]);
+ addr += RSC_PDC_DATA_OFFSET;
+ }
+
+ return 0;
+}
+
static int rpmh_probe_tcs_config(struct platform_device *pdev,
struct rsc_drv *drv)
{
@@ -564,21 +588,20 @@ static int rpmh_probe_tcs_config(struct platform_device *pdev,
int i, ret, n, st = 0;
struct tcs_group *tcs;
struct resource *res;
- void __iomem *base;
char drv_id[10] = {0};
snprintf(drv_id, ARRAY_SIZE(drv_id), "drv-%d", drv->id);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, drv_id);
- base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(base))
- return PTR_ERR(base);
+ drv->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(drv->base))
+ return PTR_ERR(drv->base);
ret = of_property_read_u32(dn, "qcom,tcs-offset", &offset);
if (ret)
return ret;
- drv->tcs_base = base + offset;
+ drv->tcs_base = drv->base + offset;
- config = readl_relaxed(base + DRV_PRNT_CHLD_CONFIG);
+ config = readl_relaxed(drv->base + DRV_PRNT_CHLD_CONFIG);
max_tcs = config;
max_tcs &= DRV_NUM_TCS_MASK << (DRV_NUM_TCS_SHIFT * drv->id);
diff --git a/drivers/soc/qcom/rpmh.c b/drivers/soc/qcom/rpmh.c
index c7beb68..71a76ea 100644
--- a/drivers/soc/qcom/rpmh.c
+++ b/drivers/soc/qcom/rpmh.c
@@ -413,6 +413,34 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
}
EXPORT_SYMBOL(rpmh_write_batch);
+/**
+ * rpmh_write_pdc_data: Write PDC data to the controller
+ *
+ * @dev: the device making the request
+ * @cmd: The payload data
+ * @n: The number of elements in payload
+ *
+ * Write PDC data to the controller. The messages are always sent async.
+ *
+ * May be called from atomic contexts.
+ */
+int rpmh_write_pdc_data(const struct device *dev,
+ const struct tcs_cmd *cmd, u32 n)
+{
+ DEFINE_RPMH_MSG_ONSTACK(dev, 0, NULL, rpm_msg);
+ struct rpmh_ctrlr *ctrlr = get_rpmh_ctrlr(dev);
+
+ if (!n || n > MAX_RPMH_PAYLOAD)
+ return -EINVAL;
+
+ memcpy(rpm_msg.cmd, cmd, n * sizeof(*cmd));
+ rpm_msg.msg.num_cmds = n;
+ rpm_msg.msg.wait_for_compl = false;
+
+ return rpmh_rsc_write_pdc_data(ctrlr_to_drv(ctrlr), &rpm_msg.msg);
+}
+EXPORT_SYMBOL(rpmh_write_pdc_data);
+
static int is_req_valid(struct cache_req *req)
{
return (req->sleep_val != UINT_MAX &&
diff --git a/include/soc/qcom/rpmh.h b/include/soc/qcom/rpmh.h
index 619e07c..b05e31a 100644
--- a/include/soc/qcom/rpmh.h
+++ b/include/soc/qcom/rpmh.h
@@ -24,6 +24,9 @@ int rpmh_write_batch(const struct device *dev, enum rpmh_state state,
int rpmh_invalidate(const struct device *dev);
+int rpmh_write_pdc_data(const struct device *dev,
+ const struct tcs_cmd *cmd, u32 n);
+
#else
static inline int rpmh_write(const struct device *dev, enum rpmh_state state,
@@ -46,6 +49,10 @@ static inline int rpmh_flush(const struct device *dev)
static inline int rpmh_invalidate(const struct device *dev)
{ return -ENODEV; }
+static inline int rpmh_write_pdc_data(const struct device *dev,
+ const struct tcs_cmd *cmd, u32 n)
+{ return -ENODEV; }
+
#endif /* CONFIG_QCOM_RPMH */
#endif /* __SOC_QCOM_RPMH_H__ */
--
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