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interconnect: qcom: smd-rpm: Add rpmcc handling skeleton code

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Introduce qcom_icc_rpm_set_bus_rate() in preparation for handling RPM
clock resources within the interconnect framework. This lets us greatly
simplify all of the code handling, as setting the rate comes down to:

u32 rate_khz = max(clk.sleep_rate, clk.active_rate, clk_a.active_rate)
write_to_rpm(clock.description, rate_khz);

Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Georgi Djakov <djakov@kernel.org>
Link: https://lore.kernel.org/r/20230526-topic-smd_icc-v7-9-09c78c175546@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Konrad Dybcio 2023-06-19 15:04:34 +02:00 committed by Bjorn Andersson
parent 19ced2aec6
commit a927eb09d4
2 changed files with 36 additions and 0 deletions
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15
drivers/interconnect/qcom/icc-rpm.h
View File

@ -25,6 +25,18 @@ enum qcom_icc_type {
QCOM_ICC_QNOC,
};
/**
* struct rpm_clk_resource - RPM bus clock resource
* @resource_type: RPM resource type of the clock resource
* @clock_id: index of the clock resource of a specific resource type
* @branch: whether the resource represents a branch clock
*/
struct rpm_clk_resource {
u32 resource_type;
u32 clock_id;
bool branch;
};
#define NUM_BUS_CLKS 2
/**
@ -50,6 +62,7 @@ struct qcom_icc_provider {
unsigned int qos_offset;
u64 bus_clk_rate[NUM_BUS_CLKS];
struct clk_bulk_data bus_clks[NUM_BUS_CLKS];
const struct rpm_clk_resource *bus_clk_desc;
struct clk_bulk_data *intf_clks;
bool keep_alive;
bool is_on;
@ -107,6 +120,7 @@ struct qcom_icc_desc {
struct qcom_icc_node * const *nodes;
size_t num_nodes;
const char * const *bus_clocks;
const struct rpm_clk_resource *bus_clk_desc;
const char * const *intf_clocks;
size_t num_intf_clocks;
bool keep_alive;
@ -128,5 +142,6 @@ int qnoc_remove(struct platform_device *pdev);
bool qcom_icc_rpm_smd_available(void);
int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val);
int qcom_icc_rpm_set_bus_rate(const struct rpm_clk_resource *clk, int ctx, u32 rate);
#endif

21
drivers/interconnect/qcom/smd-rpm.c
View File

@ -16,6 +16,7 @@
#include "icc-rpm.h"
#define RPM_KEY_BW 0x00007762
#define QCOM_RPM_SMD_KEY_RATE 0x007a484b
static struct qcom_smd_rpm *icc_smd_rpm;
@ -44,6 +45,26 @@ int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val)
}
EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_send);
int qcom_icc_rpm_set_bus_rate(const struct rpm_clk_resource *clk, int ctx, u32 rate)
{
struct clk_smd_rpm_req req = {
.key = cpu_to_le32(QCOM_RPM_SMD_KEY_RATE),
.nbytes = cpu_to_le32(sizeof(u32)),
};
/* Branch clocks are only on/off */
if (clk->branch)
rate = !!rate;
req.value = cpu_to_le32(rate);
return qcom_rpm_smd_write(icc_smd_rpm,
ctx,
clk->resource_type,
clk->clock_id,
&req, sizeof(req));
}
EXPORT_SYMBOL_GPL(qcom_icc_rpm_set_bus_rate);
static int qcom_icc_rpm_smd_remove(struct platform_device *pdev)
{
icc_smd_rpm = NULL;