Commit a927eb09 authored by Konrad Dybcio's avatar Konrad Dybcio Committed by Bjorn Andersson
Browse files

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



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: default avatarStephan Gerhold <stephan@gerhold.net>
Signed-off-by: default avatarKonrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: default avatarGeorgi Djakov <djakov@kernel.org>
Link: https://lore.kernel.org/r/20230526-topic-smd_icc-v7-9-09c78c175546@linaro.org


Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
parent 19ced2ae

drivers/interconnect/qcom/icc-rpm.h

+15 −0
Original line number Diff line number Diff line
@@ -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

drivers/interconnect/qcom/smd-rpm.c

+21 −0
Original line number Diff line number Diff line
@@ -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;