Commit 911bd739 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by paul
Browse files

ARM: OMAP4: PM: Add init api for DPLL nodes



An api at init for all dpll nodes seem to be
needed to reparent the dpll clk node to its
bypass clk in case the dpll is in bypass.
If not done this causes sequencing issues at init
during propogate_rate.
Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
parent 16975a79
......@@ -70,9 +70,41 @@
u8 cpu_mask;
/*-------------------------------------------------------------------------
* OMAP2/3 specific clock functions
* OMAP2/3/4 specific clock functions
*-------------------------------------------------------------------------*/
void omap2_init_dpll_parent(struct clk *clk)
{
u32 v;
struct dpll_data *dd;
dd = clk->dpll_data;
if (!dd)
return;
/* Return bypass rate if DPLL is bypassed */
v = __raw_readl(dd->control_reg);
v &= dd->enable_mask;
v >>= __ffs(dd->enable_mask);
/* Reparent in case the dpll is in bypass */
if (cpu_is_omap24xx()) {
if (v == OMAP2XXX_EN_DPLL_LPBYPASS ||
v == OMAP2XXX_EN_DPLL_FRBYPASS)
clk_reparent(clk, dd->clk_bypass);
} else if (cpu_is_omap34xx()) {
if (v == OMAP3XXX_EN_DPLL_LPBYPASS ||
v == OMAP3XXX_EN_DPLL_FRBYPASS)
clk_reparent(clk, dd->clk_bypass);
} else if (cpu_is_omap44xx()) {
if (v == OMAP4XXX_EN_DPLL_LPBYPASS ||
v == OMAP4XXX_EN_DPLL_FRBYPASS ||
v == OMAP4XXX_EN_DPLL_MNBYPASS)
clk_reparent(clk, dd->clk_bypass);
}
return;
}
/**
* _omap2xxx_clk_commit - commit clock parent/rate changes in hardware
* @clk: struct clk *
......
......@@ -82,6 +82,7 @@ unsigned long omap2_fixed_divisor_recalc(struct clk *clk);
long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate);
int omap2_clksel_set_rate(struct clk *clk, unsigned long rate);
u32 omap2_get_dpll_rate(struct clk *clk);
void omap2_init_dpll_parent(struct clk *clk);
int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name);
void omap2_clk_prepare_for_reboot(void);
int omap2_dflt_clk_enable(struct clk *clk);
......
......@@ -278,6 +278,7 @@ static struct clk dpll_abe_ck = {
.name = "dpll_abe_ck",
.parent = &abe_dpll_refclk_mux_ck,
.dpll_data = &dpll_abe_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_noncore_dpll_ops,
.recalc = &omap3_dpll_recalc,
.round_rate = &omap2_dpll_round_rate,
......@@ -439,6 +440,7 @@ static struct clk dpll_core_ck = {
.name = "dpll_core_ck",
.parent = &dpll_sys_ref_clk,
.dpll_data = &dpll_core_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_null,
.recalc = &omap3_dpll_recalc,
.flags = CLOCK_IN_OMAP4430,
......@@ -665,6 +667,7 @@ static struct clk dpll_iva_ck = {
.name = "dpll_iva_ck",
.parent = &dpll_sys_ref_clk,
.dpll_data = &dpll_iva_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_noncore_dpll_ops,
.recalc = &omap3_dpll_recalc,
.round_rate = &omap2_dpll_round_rate,
......@@ -727,6 +730,7 @@ static struct clk dpll_mpu_ck = {
.name = "dpll_mpu_ck",
.parent = &dpll_sys_ref_clk,
.dpll_data = &dpll_mpu_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_noncore_dpll_ops,
.recalc = &omap3_dpll_recalc,
.round_rate = &omap2_dpll_round_rate,
......@@ -802,6 +806,7 @@ static struct clk dpll_per_ck = {
.name = "dpll_per_ck",
.parent = &dpll_sys_ref_clk,
.dpll_data = &dpll_per_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_noncore_dpll_ops,
.recalc = &omap3_dpll_recalc,
.round_rate = &omap2_dpll_round_rate,
......@@ -924,6 +929,7 @@ static struct clk dpll_unipro_ck = {
.name = "dpll_unipro_ck",
.parent = &dpll_sys_ref_clk,
.dpll_data = &dpll_unipro_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_noncore_dpll_ops,
.recalc = &omap3_dpll_recalc,
.round_rate = &omap2_dpll_round_rate,
......@@ -981,6 +987,7 @@ static struct clk dpll_usb_ck = {
.name = "dpll_usb_ck",
.parent = &dpll_sys_ref_clk,
.dpll_data = &dpll_usb_dd,
.init = &omap2_init_dpll_parent,
.ops = &clkops_noncore_dpll_ops,
.recalc = &omap3_dpll_recalc,
.round_rate = &omap2_dpll_round_rate,
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment