* [PATCH v2 2/3] clk: qcom: clk-rcg2: Introduce a cfg offset for RCGs
2019-02-11 7:39 [PATCH v2 1/3] clk: qcom: remove empty lines in clk-rcg.h Vinod Koul
@ 2019-02-11 7:39 ` Vinod Koul
2019-02-21 22:18 ` Stephen Boyd
2019-02-11 7:39 ` [PATCH v2 3/3] clk: qcom: gcc-qcs404: Add cfg_offset for blsp1_uart3 clock Vinod Koul
2019-02-21 22:18 ` [PATCH v2 1/3] clk: qcom: remove empty lines in clk-rcg.h Stephen Boyd
2 siblings, 1 reply; 6+ messages in thread
From: Vinod Koul @ 2019-02-11 7:39 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd
Cc: linux-arm-msm, Bjorn Andersson, Taniya Das, Andy Gross,
David Brown, linux-soc, linux-clk, Anu Ramanathan, Shawn Guo,
Vinod Koul
From: Taniya Das <tdas@codeaurora.org>
The RCG CFG/M/N/D register base could be at a different offset than
the CMD register, so introduce a cfg_offset to identify the offset
with respect to the CMD RCGR register.
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: Anu Ramanathan <anur@codeaurora.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
Changes in v2:
- add macros and update comment
drivers/clk/qcom/clk-rcg.h | 2 ++
drivers/clk/qcom/clk-rcg2.c | 24 ++++++++++++++----------
2 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/drivers/clk/qcom/clk-rcg.h b/drivers/clk/qcom/clk-rcg.h
index 91336a030179..c25b57c3cbc8 100644
--- a/drivers/clk/qcom/clk-rcg.h
+++ b/drivers/clk/qcom/clk-rcg.h
@@ -138,6 +138,7 @@ extern const struct clk_ops clk_dyn_rcg_ops;
* @parent_map: map from software's parent index to hardware's src_sel field
* @freq_tbl: frequency table
* @clkr: regmap clock handle
+ * @cfg_off: defines the cfg register offset from the CMD_RCGR + CFG_REG
*/
struct clk_rcg2 {
u32 cmd_rcgr;
@@ -147,6 +148,7 @@ struct clk_rcg2 {
const struct parent_map *parent_map;
const struct freq_tbl *freq_tbl;
struct clk_regmap clkr;
+ u8 cfg_off;
};
#define to_clk_rcg2(_hw) container_of(to_clk_regmap(_hw), struct clk_rcg2, clkr)
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 6e3bd195d012..8c02bffe50df 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -41,6 +41,11 @@
#define N_REG 0xc
#define D_REG 0x10
+#define RCG_CFG_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + CFG_REG)
+#define RCG_M_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + M_REG)
+#define RCG_N_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + N_REG)
+#define RCG_D_OFFSET(rcg) ((rcg)->cmd_rcgr + (rcg)->cfg_off + D_REG)
+
/* Dynamic Frequency Scaling */
#define MAX_PERF_LEVEL 8
#define SE_CMD_DFSR_OFFSET 0x14
@@ -74,7 +79,7 @@ static u8 clk_rcg2_get_parent(struct clk_hw *hw)
u32 cfg;
int i, ret;
- ret = regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, &cfg);
+ ret = regmap_read(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg), &cfg);
if (ret)
goto err;
@@ -123,7 +128,7 @@ static int clk_rcg2_set_parent(struct clk_hw *hw, u8 index)
int ret;
u32 cfg = rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
- ret = regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
+ ret = regmap_update_bits(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg),
CFG_SRC_SEL_MASK, cfg);
if (ret)
return ret;
@@ -162,13 +167,13 @@ clk_rcg2_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
struct clk_rcg2 *rcg = to_clk_rcg2(hw);
u32 cfg, hid_div, m = 0, n = 0, mode = 0, mask;
- regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG, &cfg);
+ regmap_read(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg), &cfg);
if (rcg->mnd_width) {
mask = BIT(rcg->mnd_width) - 1;
- regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + M_REG, &m);
+ regmap_read(rcg->clkr.regmap, RCG_M_OFFSET(rcg), &m);
m &= mask;
- regmap_read(rcg->clkr.regmap, rcg->cmd_rcgr + N_REG, &n);
+ regmap_read(rcg->clkr.regmap, RCG_N_OFFSET(rcg), &n);
n = ~n;
n &= mask;
n += m;
@@ -263,17 +268,17 @@ static int __clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
if (rcg->mnd_width && f->n) {
mask = BIT(rcg->mnd_width) - 1;
ret = regmap_update_bits(rcg->clkr.regmap,
- rcg->cmd_rcgr + M_REG, mask, f->m);
+ RCG_M_OFFSET(rcg), mask, f->m);
if (ret)
return ret;
ret = regmap_update_bits(rcg->clkr.regmap,
- rcg->cmd_rcgr + N_REG, mask, ~(f->n - f->m));
+ RCG_N_OFFSET(rcg), mask, ~(f->n - f->m));
if (ret)
return ret;
ret = regmap_update_bits(rcg->clkr.regmap,
- rcg->cmd_rcgr + D_REG, mask, ~f->n);
+ RCG_D_OFFSET(rcg), mask, ~f->n);
if (ret)
return ret;
}
@@ -284,8 +289,7 @@ static int __clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
cfg |= rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
if (rcg->mnd_width && f->n && (f->m != f->n))
cfg |= CFG_MODE_DUAL_EDGE;
-
- return regmap_update_bits(rcg->clkr.regmap, rcg->cmd_rcgr + CFG_REG,
+ return regmap_update_bits(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg),
mask, cfg);
}
--
2.20.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH v2 3/3] clk: qcom: gcc-qcs404: Add cfg_offset for blsp1_uart3 clock
2019-02-11 7:39 [PATCH v2 1/3] clk: qcom: remove empty lines in clk-rcg.h Vinod Koul
2019-02-11 7:39 ` [PATCH v2 2/3] clk: qcom: clk-rcg2: Introduce a cfg offset for RCGs Vinod Koul
@ 2019-02-11 7:39 ` Vinod Koul
2019-02-21 22:18 ` Stephen Boyd
2019-02-21 22:18 ` [PATCH v2 1/3] clk: qcom: remove empty lines in clk-rcg.h Stephen Boyd
2 siblings, 1 reply; 6+ messages in thread
From: Vinod Koul @ 2019-02-11 7:39 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd
Cc: linux-arm-msm, Bjorn Andersson, Taniya Das, Andy Gross,
David Brown, linux-soc, linux-clk, Anu Ramanathan, Shawn Guo,
Vinod Koul
From: Taniya Das <tdas@codeaurora.org>
The CFG/M/N/D registers are at an offset of 0x20 from the CMD register
only for blsp1_uart3 clock, so add it for uart3 only.
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: Anu Ramanathan <anur@codeaurora.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
Changes in v2:
Update changelog to indicate that uart3 alone suffers from this
drivers/clk/qcom/gcc-qcs404.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/clk/qcom/gcc-qcs404.c b/drivers/clk/qcom/gcc-qcs404.c
index a7b2fe0fe505..5a62f64ada93 100644
--- a/drivers/clk/qcom/gcc-qcs404.c
+++ b/drivers/clk/qcom/gcc-qcs404.c
@@ -678,6 +678,7 @@ static struct clk_rcg2 blsp1_uart3_apps_clk_src = {
.cmd_rcgr = 0x4014,
.mnd_width = 16,
.hid_width = 5,
+ .cfg_off = 0x20,
.parent_map = gcc_parent_map_0,
.freq_tbl = ftbl_blsp1_uart0_apps_clk_src,
.clkr.hw.init = &(struct clk_init_data){
--
2.20.1
^ permalink raw reply related [flat|nested] 6+ messages in thread