static int mux_div_clk_set_rate(struct clk *c, unsigned long rate)
{
struct mux_div_clk *md = to_mux_div_clk(c);
unsigned long flags, rrate;
unsigned long new_prate, old_prate;
struct clk *old_parent, *new_parent;
u32 new_div, old_div;
int rc;
rc = safe_parent_init_once(c);
if (rc)
return rc;
rrate = __mux_div_round_rate(c, rate, &new_parent, &new_div,
&new_prate);
if (rrate != rate)
return -EINVAL;
old_parent = c->parent;
old_div = md->data.div;
old_prate = clk_get_rate(c->parent);
/* Refer to the description of safe_freq in clock-generic.h */
if (md->safe_freq)
rc = set_src_div(md, md->safe_parent, md->safe_div);
else if (new_parent == old_parent && new_div >= old_div) {
/*
* If both the parent_rate and divider changes, there may be an
* intermediate frequency generated. Ensure this intermediate
* frequency is less than both the new rate and previous rate.
*/
rc = set_src_div(md, old_parent, new_div);
}
if (rc)
return rc;
rc = clk_set_rate(new_parent, new_prate);
if (rc) {
pr_err("failed to set %s to %ld\n",
new_parent->dbg_name, new_prate);
goto err_set_rate;
}
rc = __clk_pre_reparent(c, new_parent, &flags);
if (rc)
goto err_pre_reparent;
/* Set divider and mux src atomically */
rc = __set_src_div(md, new_parent, new_div);
if (rc)
goto err_set_src_div;
c->parent = new_parent;
__clk_post_reparent(c, old_parent, &flags);
return 0;
err_set_src_div:
/* Not switching to new_parent, so disable it */
__clk_post_reparent(c, new_parent, &flags);
err_pre_reparent:
rc = clk_set_rate(old_parent, old_prate);
WARN(rc, "%s: error changing parent (%s) rate to %ld\n",
c->dbg_name, old_parent->dbg_name, old_prate);
err_set_rate:
rc = set_src_div(md, old_parent, old_div);
WARN(rc, "%s: error changing back to original div (%d) and parent (%s)\n",
c->dbg_name, old_div, old_parent->dbg_name);
return rc;
}
static int mux_div_clk_set_rate(struct clk *c, unsigned long rate)
{
struct mux_div_clk *md = to_mux_div_clk(c);
unsigned long flags, rrate;
unsigned long new_prate, old_prate;
struct clk *old_parent, *new_parent;
u32 new_div, old_div;
int rc;
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_SAFE_PARENT_INIT);
#endif
log_clk_call(c, FN_SET_RATE, rate);
rc = safe_parent_init_once(c);
if (rc)
return rc;
rrate = __mux_div_round_rate(c, rate, &new_parent, &new_div,
&new_prate);
if (rrate != rate)
return -EINVAL;
old_parent = c->parent;
old_div = md->data.div;
old_prate = clk_get_rate(c->parent);
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_SET_SAFE_RATE);
#endif
if (md->safe_freq)
rc = set_src_div(md, md->safe_parent, md->safe_div);
else if (new_parent == old_parent && new_div >= old_div) {
rc = set_src_div(md, old_parent, new_div);
}
if (rc) {
WARN(rc, "error switching to safe_parent freq=%ld\n", md->safe_freq);
return rc;
}
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_SET_PARENT_RATE);
#endif
rc = clk_set_rate(new_parent, new_prate);
if (rc) {
pr_err("failed to set %s to %ld\n",
new_parent->dbg_name, new_prate);
goto err_set_rate;
}
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_CLK_PREPARE);
#endif
rc = __clk_pre_reparent(c, new_parent, &flags);
if (rc)
goto err_pre_reparent;
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_SET_RATE);
#endif
rc = __set_src_div(md, new_parent, new_div);
if (rc)
goto err_set_src_div;
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_cpu_freq_footprint(FT_CUR_RATE, 0, rrate);
set_acpuclk_footprint(0, ACPU_BEFORE_CLK_UNPREPARE);
#endif
c->parent = new_parent;
__clk_post_reparent(c, old_parent, &flags);
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_RETURN);
#endif
return 0;
err_set_src_div:
WARN(rc, "disabling %s\n", new_parent->dbg_name);
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_ERR_CLK_UNPREPARE);
#endif
__clk_post_reparent(c, new_parent, &flags);
err_pre_reparent:
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_ERR_SET_PARENT_RATE);
#endif
WARN(rc, "%s: error changing parent (%s) rate to %ld\n",
c->dbg_name, old_parent->dbg_name, old_prate);
rc = clk_set_rate(old_parent, old_prate);
err_set_rate:
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_ERR_SET_RATE);
#endif
WARN(rc, "%s: error changing back to original div (%d) and parent (%s)\n",
c->dbg_name, old_div, old_parent->dbg_name);
rc = set_src_div(md, old_parent, old_div);
#if defined(CONFIG_HTC_DEBUG_FOOTPRINT) && defined(CONFIG_MSM_CORTEX_A7)
set_acpuclk_footprint(0, ACPU_BEFORE_ERR_RETURN);
#endif
return rc;
}
static int mux_div_clk_set_rate(struct clk *c, unsigned long rate)
{
struct mux_div_clk *md = to_mux_div_clk(c);
unsigned long flags, rrate;
unsigned long new_prate, old_prate;
struct clk *old_parent, *new_parent;
u32 new_div, old_div;
int rc;
rc = safe_parent_init_once(c);
if (rc)
return rc;
rrate = __mux_div_round_rate(c, rate, &new_parent, &new_div,
&new_prate);
if (rrate != rate)
return -EINVAL;
old_parent = c->parent;
old_div = md->data.div;
old_prate = clk_get_rate(c->parent);
if (md->safe_freq)
rc = set_src_div(md, md->safe_parent, md->safe_div);
else if (new_parent == old_parent && new_div >= old_div) {
rc = set_src_div(md, old_parent, new_div);
}
if (rc)
return rc;
rc = clk_set_rate(new_parent, new_prate);
if (rc) {
pr_err("failed to set %s to %ld\n",
clk_name(new_parent), new_prate);
goto err_set_rate;
}
rc = __clk_pre_reparent(c, new_parent, &flags);
if (rc)
goto err_pre_reparent;
rc = __set_src_div(md, new_parent, new_div);
if (rc)
goto err_set_src_div;
c->parent = new_parent;
__clk_post_reparent(c, old_parent, &flags);
return 0;
err_set_src_div:
__clk_post_reparent(c, new_parent, &flags);
err_pre_reparent:
rc = clk_set_rate(old_parent, old_prate);
WARN(rc, "%s: error changing parent (%s) rate to %ld\n",
clk_name(c), clk_name(old_parent), old_prate);
err_set_rate:
rc = set_src_div(md, old_parent, old_div);
WARN(rc, "%s: error changing back to original div (%d) and parent (%s)\n",
clk_name(c), old_div, clk_name(old_parent));
return rc;
}
