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Message-Id: <1407348912-9124-3-git-send-email-sboyd@codeaurora.org>
Date: Wed, 6 Aug 2014 11:15:11 -0700
From: Stephen Boyd <sboyd@...eaurora.org>
To: Mike Turquette <mturquette@...aro.org>
Cc: linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 2/3] clk: qcom: Add support for banked MD RCGs
The banked MD RCGs in global clock control have a different
register layout than the ones implemented in multimedia clock
control. Add support for these types of clocks so we can change
the rates of the UBI32 clocks.
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
drivers/clk/qcom/clk-rcg.c | 99 ++++++++++++++++++++++-------------------
drivers/clk/qcom/clk-rcg.h | 6 ++-
drivers/clk/qcom/mmcc-msm8960.c | 28 +++++++++---
3 files changed, 77 insertions(+), 56 deletions(-)
diff --git a/drivers/clk/qcom/clk-rcg.c b/drivers/clk/qcom/clk-rcg.c
index b638c5846dbf..356e4de360d1 100644
--- a/drivers/clk/qcom/clk-rcg.c
+++ b/drivers/clk/qcom/clk-rcg.c
@@ -67,16 +67,16 @@ static u8 clk_dyn_rcg_get_parent(struct clk_hw *hw)
{
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
int num_parents = __clk_get_num_parents(hw->clk);
- u32 ns, ctl;
+ u32 ns, reg;
int bank;
int i;
struct src_sel *s;
- regmap_read(rcg->clkr.regmap, rcg->clkr.enable_reg, &ctl);
- bank = reg_to_bank(rcg, ctl);
+ regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
+ bank = reg_to_bank(rcg, reg);
s = &rcg->s[bank];
- regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
+ regmap_read(rcg->clkr.regmap, rcg->ns_reg[bank], &ns);
ns = ns_to_src(s, ns);
for (i = 0; i < num_parents; i++)
@@ -192,90 +192,93 @@ static u32 mn_to_reg(struct mn *mn, u32 m, u32 n, u32 val)
static void configure_bank(struct clk_dyn_rcg *rcg, const struct freq_tbl *f)
{
- u32 ns, md, ctl, *regp;
+ u32 ns, md, reg;
int bank, new_bank;
struct mn *mn;
struct pre_div *p;
struct src_sel *s;
bool enabled;
- u32 md_reg;
- u32 bank_reg;
+ u32 md_reg, ns_reg;
bool banked_mn = !!rcg->mn[1].width;
+ bool banked_p = !!rcg->p[1].pre_div_width;
struct clk_hw *hw = &rcg->clkr.hw;
enabled = __clk_is_enabled(hw->clk);
- regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
- regmap_read(rcg->clkr.regmap, rcg->clkr.enable_reg, &ctl);
-
- if (banked_mn) {
- regp = &ctl;
- bank_reg = rcg->clkr.enable_reg;
- } else {
- regp = &ns;
- bank_reg = rcg->ns_reg;
- }
-
- bank = reg_to_bank(rcg, *regp);
+ regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
+ bank = reg_to_bank(rcg, reg);
new_bank = enabled ? !bank : bank;
+ ns_reg = rcg->ns_reg[new_bank];
+ regmap_read(rcg->clkr.regmap, ns_reg, &ns);
+
if (banked_mn) {
mn = &rcg->mn[new_bank];
md_reg = rcg->md_reg[new_bank];
ns |= BIT(mn->mnctr_reset_bit);
- regmap_write(rcg->clkr.regmap, rcg->ns_reg, ns);
+ regmap_write(rcg->clkr.regmap, ns_reg, ns);
regmap_read(rcg->clkr.regmap, md_reg, &md);
md = mn_to_md(mn, f->m, f->n, md);
regmap_write(rcg->clkr.regmap, md_reg, md);
ns = mn_to_ns(mn, f->m, f->n, ns);
- regmap_write(rcg->clkr.regmap, rcg->ns_reg, ns);
+ regmap_write(rcg->clkr.regmap, ns_reg, ns);
- ctl = mn_to_reg(mn, f->m, f->n, ctl);
- regmap_write(rcg->clkr.regmap, rcg->clkr.enable_reg, ctl);
+ /* Two NS registers means mode control is in NS register */
+ if (rcg->ns_reg[0] != rcg->ns_reg[1]) {
+ ns = mn_to_reg(mn, f->m, f->n, ns);
+ regmap_write(rcg->clkr.regmap, ns_reg, ns);
+ } else {
+ reg = mn_to_reg(mn, f->m, f->n, reg);
+ regmap_write(rcg->clkr.regmap, rcg->bank_reg, reg);
+ }
ns &= ~BIT(mn->mnctr_reset_bit);
- regmap_write(rcg->clkr.regmap, rcg->ns_reg, ns);
- } else {
+ regmap_write(rcg->clkr.regmap, ns_reg, ns);
+ }
+
+ if (banked_p) {
p = &rcg->p[new_bank];
ns = pre_div_to_ns(p, f->pre_div - 1, ns);
}
s = &rcg->s[new_bank];
ns = src_to_ns(s, s->parent_map[f->src], ns);
- regmap_write(rcg->clkr.regmap, rcg->ns_reg, ns);
+ regmap_write(rcg->clkr.regmap, ns_reg, ns);
if (enabled) {
- *regp ^= BIT(rcg->mux_sel_bit);
- regmap_write(rcg->clkr.regmap, bank_reg, *regp);
+ regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
+ reg ^= BIT(rcg->mux_sel_bit);
+ regmap_write(rcg->clkr.regmap, rcg->bank_reg, reg);
}
}
static int clk_dyn_rcg_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
- u32 ns, ctl, md, reg;
+ u32 ns, md, reg;
int bank;
struct freq_tbl f = { 0 };
bool banked_mn = !!rcg->mn[1].width;
+ bool banked_p = !!rcg->p[1].pre_div_width;
- regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
- regmap_read(rcg->clkr.regmap, rcg->clkr.enable_reg, &ctl);
- reg = banked_mn ? ctl : ns;
-
+ regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
bank = reg_to_bank(rcg, reg);
+ regmap_read(rcg->clkr.regmap, rcg->ns_reg[bank], &ns);
+
if (banked_mn) {
regmap_read(rcg->clkr.regmap, rcg->md_reg[bank], &md);
f.m = md_to_m(&rcg->mn[bank], md);
f.n = ns_m_to_n(&rcg->mn[bank], ns, f.m);
- } else {
- f.pre_div = ns_to_pre_div(&rcg->p[bank], ns) + 1;
}
- f.src = index;
+ if (banked_p)
+ f.pre_div = ns_to_pre_div(&rcg->p[bank], ns) + 1;
+
+ f.src = index;
configure_bank(rcg, &f);
return 0;
@@ -336,28 +339,30 @@ clk_dyn_rcg_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
u32 m, n, pre_div, ns, md, mode, reg;
int bank;
struct mn *mn;
+ bool banked_p = !!rcg->p[1].pre_div_width;
bool banked_mn = !!rcg->mn[1].width;
- regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
-
- if (banked_mn)
- regmap_read(rcg->clkr.regmap, rcg->clkr.enable_reg, ®);
- else
- reg = ns;
-
+ regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
bank = reg_to_bank(rcg, reg);
+ regmap_read(rcg->clkr.regmap, rcg->ns_reg[bank], &ns);
+ m = n = pre_div = mode = 0;
+
if (banked_mn) {
mn = &rcg->mn[bank];
regmap_read(rcg->clkr.regmap, rcg->md_reg[bank], &md);
m = md_to_m(mn, md);
n = ns_m_to_n(mn, ns, m);
+ /* Two NS registers means mode control is in NS register */
+ if (rcg->ns_reg[0] != rcg->ns_reg[1])
+ reg = ns;
mode = reg_to_mnctr_mode(mn, reg);
- return calc_rate(parent_rate, m, n, mode, 0);
- } else {
- pre_div = ns_to_pre_div(&rcg->p[bank], ns);
- return calc_rate(parent_rate, 0, 0, 0, pre_div);
}
+
+ if (banked_p)
+ pre_div = ns_to_pre_div(&rcg->p[bank], ns);
+
+ return calc_rate(parent_rate, m, n, mode, pre_div);
}
static const
diff --git a/drivers/clk/qcom/clk-rcg.h b/drivers/clk/qcom/clk-rcg.h
index ba0523cefd2e..687e41f91d7c 100644
--- a/drivers/clk/qcom/clk-rcg.h
+++ b/drivers/clk/qcom/clk-rcg.h
@@ -103,8 +103,9 @@ extern const struct clk_ops clk_rcg_bypass_ops;
* struct clk_dyn_rcg - root clock generator with glitch free mux
*
* @mux_sel_bit: bit to switch glitch free mux
- * @ns_reg: NS register
+ * @ns_reg: NS0 and NS1 register
* @md_reg: MD0 and MD1 register
+ * @bank_reg: register to XOR @mux_sel_bit into to switch glitch free mux
* @mn: mn counter (banked)
* @s: source selector (banked)
* @freq_tbl: frequency table
@@ -113,8 +114,9 @@ extern const struct clk_ops clk_rcg_bypass_ops;
*
*/
struct clk_dyn_rcg {
- u32 ns_reg;
+ u32 ns_reg[2];
u32 md_reg[2];
+ u32 bank_reg;
u8 mux_sel_bit;
diff --git a/drivers/clk/qcom/mmcc-msm8960.c b/drivers/clk/qcom/mmcc-msm8960.c
index 2e80a219b8ea..775e00dbcbc8 100644
--- a/drivers/clk/qcom/mmcc-msm8960.c
+++ b/drivers/clk/qcom/mmcc-msm8960.c
@@ -773,9 +773,11 @@ static struct freq_tbl clk_tbl_gfx2d[] = {
};
static struct clk_dyn_rcg gfx2d0_src = {
- .ns_reg = 0x0070,
+ .ns_reg[0] = 0x0070,
+ .ns_reg[1] = 0x0070,
.md_reg[0] = 0x0064,
.md_reg[1] = 0x0068,
+ .bank_reg = 0x0060,
.mn[0] = {
.mnctr_en_bit = 8,
.mnctr_reset_bit = 25,
@@ -831,9 +833,11 @@ static struct clk_branch gfx2d0_clk = {
};
static struct clk_dyn_rcg gfx2d1_src = {
- .ns_reg = 0x007c,
+ .ns_reg[0] = 0x007c,
+ .ns_reg[1] = 0x007c,
.md_reg[0] = 0x0078,
.md_reg[1] = 0x006c,
+ .bank_reg = 0x0074,
.mn[0] = {
.mnctr_en_bit = 8,
.mnctr_reset_bit = 25,
@@ -930,9 +934,11 @@ static struct freq_tbl clk_tbl_gfx3d_8064[] = {
};
static struct clk_dyn_rcg gfx3d_src = {
- .ns_reg = 0x008c,
+ .ns_reg[0] = 0x008c,
+ .ns_reg[1] = 0x008c,
.md_reg[0] = 0x0084,
.md_reg[1] = 0x0088,
+ .bank_reg = 0x0080,
.mn[0] = {
.mnctr_en_bit = 8,
.mnctr_reset_bit = 25,
@@ -1006,9 +1012,11 @@ static struct freq_tbl clk_tbl_vcap[] = {
};
static struct clk_dyn_rcg vcap_src = {
- .ns_reg = 0x021c,
+ .ns_reg[0] = 0x021c,
+ .ns_reg[1] = 0x021c,
.md_reg[0] = 0x01ec,
.md_reg[1] = 0x0218,
+ .bank_reg = 0x0178,
.mn[0] = {
.mnctr_en_bit = 8,
.mnctr_reset_bit = 23,
@@ -1211,9 +1219,11 @@ static struct freq_tbl clk_tbl_mdp[] = {
};
static struct clk_dyn_rcg mdp_src = {
- .ns_reg = 0x00d0,
+ .ns_reg[0] = 0x00d0,
+ .ns_reg[1] = 0x00d0,
.md_reg[0] = 0x00c4,
.md_reg[1] = 0x00c8,
+ .bank_reg = 0x00c0,
.mn[0] = {
.mnctr_en_bit = 8,
.mnctr_reset_bit = 31,
@@ -1318,7 +1328,9 @@ static struct freq_tbl clk_tbl_rot[] = {
};
static struct clk_dyn_rcg rot_src = {
- .ns_reg = 0x00e8,
+ .ns_reg[0] = 0x00e8,
+ .ns_reg[1] = 0x00e8,
+ .bank_reg = 0x00e8,
.p[0] = {
.pre_div_shift = 22,
.pre_div_width = 4,
@@ -1542,9 +1554,11 @@ static struct freq_tbl clk_tbl_vcodec[] = {
};
static struct clk_dyn_rcg vcodec_src = {
- .ns_reg = 0x0100,
+ .ns_reg[0] = 0x0100,
+ .ns_reg[1] = 0x0100,
.md_reg[0] = 0x00fc,
.md_reg[1] = 0x0128,
+ .bank_reg = 0x00f8,
.mn[0] = {
.mnctr_en_bit = 5,
.mnctr_reset_bit = 31,
--
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