@@ -369,6 +369,17 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
qcom_icc_bus_aggregate(provider, agg_avg, agg_peak, &max_agg_avg);
+ /* If we're powering on the bus, ensure the necessary clocks are on */
+ if (unlikely(!qp->is_on)) {
+ if (agg_peak[0] || agg_peak[1] || max_agg_avg) {
+ /* If this fails, bus accesses will crash the platform! */
+ ret = clk_bulk_prepare_enable(qp->num_intf_clks, qp->intf_clks);
+ if (ret)
+ return ret;
+ qp->is_on = true;
+ }
+ }
+
sum_bw = icc_units_to_bps(max_agg_avg);
ret = __qcom_icc_set(src, src_qn, sum_bw);
@@ -409,6 +420,14 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
qp->bus_clk_rate[i] = rate;
}
+ /* Turn off the interface clocks if the bus was shut down so as not to leak power */
+ if (!qp->bus_clk_rate[0] && !qp->bus_clk_rate[1]) {
+ if (!agg_peak[0] && !agg_peak[1] && !max_agg_avg) {
+ clk_bulk_disable_unprepare(qp->num_intf_clks, qp->intf_clks);
+ qp->is_on = false;
+ }
+ }
+
return 0;
}
@@ -441,21 +460,20 @@ int qnoc_probe(struct platform_device *pdev)
qnodes = desc->nodes;
num_nodes = desc->num_nodes;
- if (desc->num_bus_clocks) {
- cds = desc->bus_clocks;
- cd_num = desc->num_bus_clocks;
+ if (desc->num_intf_clocks) {
+ cds = desc->intf_clocks;
+ cd_num = desc->num_intf_clocks;
} else {
- cds = bus_clocks;
- cd_num = ARRAY_SIZE(bus_clocks);
+ /* 0 intf clocks is perfectly fine */
+ cd_num = 0;
}
- qp = devm_kzalloc(dev, struct_size(qp, bus_clks, cd_num), GFP_KERNEL);
+ qp = devm_kzalloc(dev, sizeof(*qp), GFP_KERNEL);
if (!qp)
return -ENOMEM;
- qp->bus_clk_rate = devm_kcalloc(dev, cd_num, sizeof(*qp->bus_clk_rate),
- GFP_KERNEL);
- if (!qp->bus_clk_rate)
+ qp->intf_clks = devm_kzalloc(dev, sizeof(qp->intf_clks), GFP_KERNEL);
+ if (!qp->intf_clks)
return -ENOMEM;
data = devm_kzalloc(dev, struct_size(data, nodes, num_nodes),
@@ -463,6 +481,18 @@ int qnoc_probe(struct platform_device *pdev)
if (!data)
return -ENOMEM;
+ qp->num_intf_clks = cd_num;
+ for (i = 0; i < cd_num; i++)
+ qp->intf_clks[i].id = cds[i];
+
+ if (desc->num_bus_clocks) {
+ cds = desc->bus_clocks;
+ cd_num = desc->num_bus_clocks;
+ } else {
+ cds = bus_clocks;
+ cd_num = ARRAY_SIZE(bus_clocks);
+ }
+
for (i = 0; i < cd_num; i++)
qp->bus_clks[i].id = cds[i];
qp->num_bus_clks = cd_num;
@@ -503,6 +533,10 @@ int qnoc_probe(struct platform_device *pdev)
if (ret)
return ret;
+ ret = devm_clk_bulk_get(dev, qp->num_intf_clks, qp->intf_clks);
+ if (ret)
+ return ret;
+
if (desc->has_bus_pd) {
ret = dev_pm_domain_attach(dev, true);
if (ret)
@@ -20,24 +20,32 @@ enum qcom_icc_type {
QCOM_ICC_QNOC,
};
+#define NUM_BUS_CLKS 2
+
/**
* struct qcom_icc_provider - Qualcomm specific interconnect provider
* @provider: generic interconnect provider
* @num_bus_clks: the total number of bus_clks clk_bulk_data entries
+ * @num_intf_clks: the total number of intf_clks clk_bulk_data entries
* @type: the ICC provider type
* @regmap: regmap for QoS registers read/write access
* @qos_offset: offset to QoS registers
* @bus_clk_rate: bus clock rate in Hz
* @bus_clks: the clk_bulk_data table of bus clocks
+ * @intf_clks: a clk_bulk_data array of interface clocks
+ * @is_on: whether the bus is powered on
*/
struct qcom_icc_provider {
struct icc_provider provider;
int num_bus_clks;
+ int num_intf_clks;
enum qcom_icc_type type;
struct regmap *regmap;
unsigned int qos_offset;
- u64 *bus_clk_rate;
- struct clk_bulk_data bus_clks[];
+ u64 bus_clk_rate[NUM_BUS_CLKS];
+ struct clk_bulk_data bus_clks[NUM_BUS_CLKS];
+ struct clk_bulk_data *intf_clks;
+ bool is_on;
};
/**
@@ -93,6 +101,8 @@ struct qcom_icc_desc {
size_t num_nodes;
const char * const *bus_clocks;
size_t num_bus_clocks;
+ const char * const *intf_clocks;
+ size_t num_intf_clocks;
bool has_bus_pd;
enum qcom_icc_type type;
const struct regmap_config *regmap_cfg;
@@ -21,21 +21,17 @@
#include "smd-rpm.h"
#include "msm8996.h"
-static const char * const bus_mm_clocks[] = {
- "bus",
- "bus_a",
+static const char * const mm_intf_clocks[] = {
"iface"
};
-static const char * const bus_a0noc_clocks[] = {
+static const char * const a0noc_intf_clocks[] = {
"aggre0_snoc_axi",
"aggre0_cnoc_ahb",
"aggre0_noc_mpu_cfg"
};
-static const char * const bus_a2noc_clocks[] = {
- "bus",
- "bus_a",
+static const char * const a2noc_intf_clocks[] = {
"aggre2_ufs_axi",
"ufs_axi"
};
@@ -1821,8 +1817,8 @@ static const struct qcom_icc_desc msm8996_a0noc = {
.type = QCOM_ICC_NOC,
.nodes = a0noc_nodes,
.num_nodes = ARRAY_SIZE(a0noc_nodes),
- .bus_clocks = bus_a0noc_clocks,
- .num_bus_clocks = ARRAY_SIZE(bus_a0noc_clocks),
+ .intf_clocks = a0noc_intf_clocks,
+ .num_intf_clocks = ARRAY_SIZE(a0noc_intf_clocks),
.has_bus_pd = true,
.regmap_cfg = &msm8996_a0noc_regmap_config
};
@@ -1866,8 +1862,8 @@ static const struct qcom_icc_desc msm8996_a2noc = {
.type = QCOM_ICC_NOC,
.nodes = a2noc_nodes,
.num_nodes = ARRAY_SIZE(a2noc_nodes),
- .bus_clocks = bus_a2noc_clocks,
- .num_bus_clocks = ARRAY_SIZE(bus_a2noc_clocks),
+ .intf_clocks = a2noc_intf_clocks,
+ .num_intf_clocks = ARRAY_SIZE(a2noc_intf_clocks),
.regmap_cfg = &msm8996_a2noc_regmap_config
};
@@ -2005,8 +2001,8 @@ static const struct qcom_icc_desc msm8996_mnoc = {
.type = QCOM_ICC_NOC,
.nodes = mnoc_nodes,
.num_nodes = ARRAY_SIZE(mnoc_nodes),
- .bus_clocks = bus_mm_clocks,
- .num_bus_clocks = ARRAY_SIZE(bus_mm_clocks),
+ .intf_clocks = mm_intf_clocks,
+ .num_intf_clocks = ARRAY_SIZE(mm_intf_clocks),
.regmap_cfg = &msm8996_mnoc_regmap_config
};
@@ -127,15 +127,11 @@ enum {
SDM660_SNOC,
};
-static const char * const bus_mm_clocks[] = {
- "bus",
- "bus_a",
+static const char * const mm_intf_clocks[] = {
"iface",
};
-static const char * const bus_a2noc_clocks[] = {
- "bus",
- "bus_a",
+static const char * const a2noc_intf_clocks[] = {
"ipa",
"ufs_axi",
"aggre2_ufs_axi",
@@ -1516,8 +1512,8 @@ static const struct qcom_icc_desc sdm660_a2noc = {
.type = QCOM_ICC_NOC,
.nodes = sdm660_a2noc_nodes,
.num_nodes = ARRAY_SIZE(sdm660_a2noc_nodes),
- .bus_clocks = bus_a2noc_clocks,
- .num_bus_clocks = ARRAY_SIZE(bus_a2noc_clocks),
+ .intf_clocks = a2noc_intf_clocks,
+ .num_intf_clocks = ARRAY_SIZE(a2noc_intf_clocks),
.regmap_cfg = &sdm660_a2noc_regmap_config,
};
@@ -1659,8 +1655,8 @@ static const struct qcom_icc_desc sdm660_mnoc = {
.type = QCOM_ICC_NOC,
.nodes = sdm660_mnoc_nodes,
.num_nodes = ARRAY_SIZE(sdm660_mnoc_nodes),
- .bus_clocks = bus_mm_clocks,
- .num_bus_clocks = ARRAY_SIZE(bus_mm_clocks),
+ .intf_clocks = mm_intf_clocks,
+ .num_intf_clocks = ARRAY_SIZE(mm_intf_clocks),
.regmap_cfg = &sdm660_mnoc_regmap_config,
};