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debugcc: allow customizing the measurement process

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MSM8996 requires additional setup to measure CPU clocks. Add hooks to
customize the mux enable/disable and measurement process.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Dmitry Baryshkov
2022-09-23 17:57:15 +03:00
committed by Bjorn Andersson
parent 7c544f0c40
commit 783b4ffdd2
2 changed files with 32 additions and 5 deletions
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29
debugcc.c
View File

@@ -84,7 +84,7 @@ static unsigned int measure_ticks(struct debug_mux *gcc, unsigned int ticks)
return val;
}
static void mux_enable(struct debug_mux *mux, int selector)
static void mux_prepare_enable(struct debug_mux *mux, int selector)
{
uint32_t val;
@@ -100,15 +100,28 @@ static void mux_enable(struct debug_mux *mux, int selector)
writel(val, mux->base + mux->div_reg);
}
mux_enable(mux);
}
void mux_enable(struct debug_mux *mux)
{
uint32_t val;
val = readl(mux->base + mux->enable_reg);
val |= mux->enable_mask;
writel(val, mux->base + mux->enable_reg);
if (mux->premeasure)
mux->premeasure(mux);
}
static void mux_disable(struct debug_mux *mux)
void mux_disable(struct debug_mux *mux)
{
uint32_t val;
if (mux->postmeasure)
mux->postmeasure(mux);
val = readl(mux->base + mux->enable_reg);
val &= ~mux->enable_mask;
writel(val, mux->base + mux->enable_reg);
@@ -142,9 +155,9 @@ static void measure(const struct measure_clk *clk)
}
if (clk->leaf)
mux_enable(clk->leaf, clk->leaf_mux);
mux_prepare_enable(clk->leaf, clk->leaf_mux);
mux_enable(clk->primary, clk->mux);
mux_prepare_enable(clk->primary, clk->mux);
xo_div4 = readl(gcc->base + gcc->xo_div4_reg);
writel(xo_div4 | 1, gcc->base + gcc->xo_div4_reg);
@@ -252,7 +265,7 @@ static void list_clocks_block(const struct debugcc_platform *platform, const cha
}
}
static int mmap_mux(int devmem, struct debug_mux *mux)
int mmap_mux(int devmem, struct debug_mux *mux)
{
/* Do nothing if this mux has already been mapped */
if (!mux || mux->base)
@@ -364,6 +377,12 @@ int main(int argc, char **argv)
if (devmem < 0)
err(1, "failed to open /dev/mem");
if (platform->premap) {
ret = platform->premap(devmem);
if (ret < 0)
exit (1);
}
ret = mmap_hardware(devmem, platform);
if (ret < 0)
exit(1);

8
debugcc.h
View File

@@ -59,6 +59,9 @@ struct debug_mux {
unsigned int ahb_reg;
unsigned int ahb_mask;
void (*premeasure)(struct debug_mux *mux);
void (*postmeasure)(struct debug_mux *mux);
};
struct measure_clk {
@@ -75,8 +78,13 @@ struct measure_clk {
struct debugcc_platform {
const char *name;
const struct measure_clk *clocks;
int (*premap)(int devmem);
};
int mmap_mux(int devmem, struct debug_mux *mux);
void mux_enable(struct debug_mux *mux);
void mux_disable(struct debug_mux *mux);
extern struct debugcc_platform msm8936_debugcc;
extern struct debugcc_platform msm8996_debugcc;
extern struct debugcc_platform qcs404_debugcc;