* [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate
@ 2019-08-26 9:42 Peng Fan
2019-08-26 9:42 ` [PATCH V2 2/4] clk: imx: clk-pll14xx: unbypass PLL by default Peng Fan
` (3 more replies)
0 siblings, 4 replies; 6+ messages in thread
From: Peng Fan @ 2019-08-26 9:42 UTC (permalink / raw)
To: mturquette, sboyd, shawnguo, s.hauer, festevam
Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, Abel Vesa,
linux-clk, linux-arm-kernel, linux-kernel, Leonard Crestez,
Peng Fan
From: Peng Fan <peng.fan@nxp.com>
According to PLL1443XA and PLL1416X spec,
"When BYPASS is 0 and RESETB is changed from 0 to 1, FOUT starts to
output unstable clock until lock time passes. PLL1416X/PLL1443XA may
generate a glitch at FOUT."
So set BYPASS when RESETB is changed from 0 to 1 to avoid glitch.
In the end of set rate, BYPASS will be cleared.
When prepare clock, also need to take care to avoid glitch. So
we also follow Spec to set BYPASS before RESETB changed from 0 to 1.
And add a check if the RESETB is already 0, directly return 0;
Fixes: 8646d4dcc7fb ("clk: imx: Add PLLs driver for imx8mm soc")
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
V2:
Avoid glitch when prepare
update commit log
drivers/clk/imx/clk-pll14xx.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c
index b7213023b238..656f48b002dd 100644
--- a/drivers/clk/imx/clk-pll14xx.c
+++ b/drivers/clk/imx/clk-pll14xx.c
@@ -191,6 +191,10 @@ static int clk_pll1416x_set_rate(struct clk_hw *hw, unsigned long drate,
tmp &= ~RST_MASK;
writel_relaxed(tmp, pll->base);
+ /* Enable BYPASS */
+ tmp |= BYPASS_MASK;
+ writel(tmp, pll->base);
+
div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
(rate->sdiv << SDIV_SHIFT);
writel_relaxed(div_val, pll->base + 0x4);
@@ -250,6 +254,10 @@ static int clk_pll1443x_set_rate(struct clk_hw *hw, unsigned long drate,
tmp &= ~RST_MASK;
writel_relaxed(tmp, pll->base);
+ /* Enable BYPASS */
+ tmp |= BYPASS_MASK;
+ writel_relaxed(tmp, pll->base);
+
div_val = (rate->mdiv << MDIV_SHIFT) | (rate->pdiv << PDIV_SHIFT) |
(rate->sdiv << SDIV_SHIFT);
writel_relaxed(div_val, pll->base + 0x4);
@@ -283,16 +291,28 @@ static int clk_pll14xx_prepare(struct clk_hw *hw)
{
struct clk_pll14xx *pll = to_clk_pll14xx(hw);
u32 val;
+ int ret;
/*
* RESETB = 1 from 0, PLL starts its normal
* operation after lock time
*/
val = readl_relaxed(pll->base + GNRL_CTL);
+ if (val & RST_MASK)
+ return 0;
+ val |= BYPASS_MASK;
+ writel_relaxed(val, pll->base + GNRL_CTL);
val |= RST_MASK;
writel_relaxed(val, pll->base + GNRL_CTL);
- return clk_pll14xx_wait_lock(pll);
+ ret = clk_pll14xx_wait_lock(pll);
+ if (ret)
+ return ret;
+
+ val &= ~BYPASS_MASK;
+ writel_relaxed(val, pll->base + GNRL_CTL);
+
+ return 0;
}
static int clk_pll14xx_is_prepared(struct clk_hw *hw)
--
2.16.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH V2 2/4] clk: imx: clk-pll14xx: unbypass PLL by default
2019-08-26 9:42 [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Peng Fan
@ 2019-08-26 9:42 ` Peng Fan
2019-08-26 9:42 ` [PATCH V2 3/4] clk: imx: imx8mm: fix pll mux bit Peng Fan
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: Peng Fan @ 2019-08-26 9:42 UTC (permalink / raw)
To: mturquette, sboyd, shawnguo, s.hauer, festevam
Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, Abel Vesa,
linux-clk, linux-arm-kernel, linux-kernel, Leonard Crestez,
Peng Fan
From: Peng Fan <peng.fan@nxp.com>
When registering the PLL, unbypass the PLL.
The PLL has two bypass control bit, BYPASS and EXT_BYPASS.
we will expose EXT_BYPASS to clk driver for mux usage, and keep
BYPASS inside pll14xx usage. The PLL has a restriction that
when M/P change, need to RESET/BYPASS pll to avoid glitch, so
we could not expose BYPASS.
To make it easy for clk driver usage, unbypass PLL which does
not hurt current function.
Fixes: 8646d4dcc7fb ("clk: imx: Add PLLs driver for imx8mm soc")
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
V2:
New patch
drivers/clk/imx/clk-pll14xx.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c
index 656f48b002dd..7a815ec76aa5 100644
--- a/drivers/clk/imx/clk-pll14xx.c
+++ b/drivers/clk/imx/clk-pll14xx.c
@@ -368,6 +368,7 @@ struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
struct clk_pll14xx *pll;
struct clk *clk;
struct clk_init_data init;
+ u32 val;
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll)
@@ -399,6 +400,10 @@ struct clk *imx_clk_pll14xx(const char *name, const char *parent_name,
pll->rate_table = pll_clk->rate_table;
pll->rate_count = pll_clk->rate_count;
+ val = readl_relaxed(pll->base + GNRL_CTL);
+ val &= ~BYPASS_MASK;
+ writel_relaxed(val, pll->base + GNRL_CTL);
+
clk = clk_register(NULL, &pll->hw);
if (IS_ERR(clk)) {
pr_err("%s: failed to register pll %s %lu\n",
--
2.16.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH V2 3/4] clk: imx: imx8mm: fix pll mux bit
2019-08-26 9:42 [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Peng Fan
2019-08-26 9:42 ` [PATCH V2 2/4] clk: imx: clk-pll14xx: unbypass PLL by default Peng Fan
@ 2019-08-26 9:42 ` Peng Fan
2019-08-26 9:42 ` [PATCH V2 4/4] clk: imx: imx8mn: " Peng Fan
2019-09-06 17:21 ` [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Stephen Boyd
3 siblings, 0 replies; 6+ messages in thread
From: Peng Fan @ 2019-08-26 9:42 UTC (permalink / raw)
To: mturquette, sboyd, shawnguo, s.hauer, festevam
Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, Abel Vesa,
linux-clk, linux-arm-kernel, linux-kernel, Leonard Crestez,
Peng Fan
From: Peng Fan <peng.fan@nxp.com>
pll BYPASS bit should be kept inside pll driver for glitchless freq
setting following spec. If exposing the bit, that means pll driver and
clk driver has two paths to touch this bit, which is wrong.
So use EXT_BYPASS bit here.
And drop uneeded set parent, because EXT_BYPASS default is 0.
Fixes: ba5625c3e272 ("clk: imx: Add clock driver support for imx8mm")
Suggested-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
V2:
New patch
drivers/clk/imx/clk-imx8mm.c | 32 ++++++++++----------------------
1 file changed, 10 insertions(+), 22 deletions(-)
diff --git a/drivers/clk/imx/clk-imx8mm.c b/drivers/clk/imx/clk-imx8mm.c
index 2758e3f0d15d..067ab876911d 100644
--- a/drivers/clk/imx/clk-imx8mm.c
+++ b/drivers/clk/imx/clk-imx8mm.c
@@ -408,28 +408,16 @@ static int imx8mm_clocks_probe(struct platform_device *pdev)
clks[IMX8MM_SYS_PLL3] = imx_clk_pll14xx("sys_pll3", "sys_pll3_ref_sel", base + 0x114, &imx8mm_sys_pll);
/* PLL bypass out */
- clks[IMX8MM_AUDIO_PLL1_BYPASS] = imx_clk_mux_flags("audio_pll1_bypass", base, 4, 1, audio_pll1_bypass_sels, ARRAY_SIZE(audio_pll1_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_AUDIO_PLL2_BYPASS] = imx_clk_mux_flags("audio_pll2_bypass", base + 0x14, 4, 1, audio_pll2_bypass_sels, ARRAY_SIZE(audio_pll2_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_VIDEO_PLL1_BYPASS] = imx_clk_mux_flags("video_pll1_bypass", base + 0x28, 4, 1, video_pll1_bypass_sels, ARRAY_SIZE(video_pll1_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_DRAM_PLL_BYPASS] = imx_clk_mux_flags("dram_pll_bypass", base + 0x50, 4, 1, dram_pll_bypass_sels, ARRAY_SIZE(dram_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_GPU_PLL_BYPASS] = imx_clk_mux_flags("gpu_pll_bypass", base + 0x64, 4, 1, gpu_pll_bypass_sels, ARRAY_SIZE(gpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_VPU_PLL_BYPASS] = imx_clk_mux_flags("vpu_pll_bypass", base + 0x74, 4, 1, vpu_pll_bypass_sels, ARRAY_SIZE(vpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_ARM_PLL_BYPASS] = imx_clk_mux_flags("arm_pll_bypass", base + 0x84, 4, 1, arm_pll_bypass_sels, ARRAY_SIZE(arm_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_SYS_PLL1_BYPASS] = imx_clk_mux_flags("sys_pll1_bypass", base + 0x94, 4, 1, sys_pll1_bypass_sels, ARRAY_SIZE(sys_pll1_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_SYS_PLL2_BYPASS] = imx_clk_mux_flags("sys_pll2_bypass", base + 0x104, 4, 1, sys_pll2_bypass_sels, ARRAY_SIZE(sys_pll2_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MM_SYS_PLL3_BYPASS] = imx_clk_mux_flags("sys_pll3_bypass", base + 0x114, 4, 1, sys_pll3_bypass_sels, ARRAY_SIZE(sys_pll3_bypass_sels), CLK_SET_RATE_PARENT);
-
- /* unbypass all the plls */
- clk_set_parent(clks[IMX8MM_AUDIO_PLL1_BYPASS], clks[IMX8MM_AUDIO_PLL1]);
- clk_set_parent(clks[IMX8MM_AUDIO_PLL2_BYPASS], clks[IMX8MM_AUDIO_PLL2]);
- clk_set_parent(clks[IMX8MM_VIDEO_PLL1_BYPASS], clks[IMX8MM_VIDEO_PLL1]);
- clk_set_parent(clks[IMX8MM_DRAM_PLL_BYPASS], clks[IMX8MM_DRAM_PLL]);
- clk_set_parent(clks[IMX8MM_GPU_PLL_BYPASS], clks[IMX8MM_GPU_PLL]);
- clk_set_parent(clks[IMX8MM_VPU_PLL_BYPASS], clks[IMX8MM_VPU_PLL]);
- clk_set_parent(clks[IMX8MM_ARM_PLL_BYPASS], clks[IMX8MM_ARM_PLL]);
- clk_set_parent(clks[IMX8MM_SYS_PLL1_BYPASS], clks[IMX8MM_SYS_PLL1]);
- clk_set_parent(clks[IMX8MM_SYS_PLL2_BYPASS], clks[IMX8MM_SYS_PLL2]);
- clk_set_parent(clks[IMX8MM_SYS_PLL3_BYPASS], clks[IMX8MM_SYS_PLL3]);
+ clks[IMX8MM_AUDIO_PLL1_BYPASS] = imx_clk_mux_flags("audio_pll1_bypass", base, 16, 1, audio_pll1_bypass_sels, ARRAY_SIZE(audio_pll1_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_AUDIO_PLL2_BYPASS] = imx_clk_mux_flags("audio_pll2_bypass", base + 0x14, 16, 1, audio_pll2_bypass_sels, ARRAY_SIZE(audio_pll2_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_VIDEO_PLL1_BYPASS] = imx_clk_mux_flags("video_pll1_bypass", base + 0x28, 16, 1, video_pll1_bypass_sels, ARRAY_SIZE(video_pll1_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_DRAM_PLL_BYPASS] = imx_clk_mux_flags("dram_pll_bypass", base + 0x50, 16, 1, dram_pll_bypass_sels, ARRAY_SIZE(dram_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_GPU_PLL_BYPASS] = imx_clk_mux_flags("gpu_pll_bypass", base + 0x64, 28, 1, gpu_pll_bypass_sels, ARRAY_SIZE(gpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_VPU_PLL_BYPASS] = imx_clk_mux_flags("vpu_pll_bypass", base + 0x74, 28, 1, vpu_pll_bypass_sels, ARRAY_SIZE(vpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_ARM_PLL_BYPASS] = imx_clk_mux_flags("arm_pll_bypass", base + 0x84, 28, 1, arm_pll_bypass_sels, ARRAY_SIZE(arm_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_SYS_PLL1_BYPASS] = imx_clk_mux_flags("sys_pll1_bypass", base + 0x94, 28, 1, sys_pll1_bypass_sels, ARRAY_SIZE(sys_pll1_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_SYS_PLL2_BYPASS] = imx_clk_mux_flags("sys_pll2_bypass", base + 0x104, 28, 1, sys_pll2_bypass_sels, ARRAY_SIZE(sys_pll2_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MM_SYS_PLL3_BYPASS] = imx_clk_mux_flags("sys_pll3_bypass", base + 0x114, 28, 1, sys_pll3_bypass_sels, ARRAY_SIZE(sys_pll3_bypass_sels), CLK_SET_RATE_PARENT);
/* PLL out gate */
clks[IMX8MM_AUDIO_PLL1_OUT] = imx_clk_gate("audio_pll1_out", "audio_pll1_bypass", base, 13);
--
2.16.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH V2 4/4] clk: imx: imx8mn: fix pll mux bit
2019-08-26 9:42 [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Peng Fan
2019-08-26 9:42 ` [PATCH V2 2/4] clk: imx: clk-pll14xx: unbypass PLL by default Peng Fan
2019-08-26 9:42 ` [PATCH V2 3/4] clk: imx: imx8mm: fix pll mux bit Peng Fan
@ 2019-08-26 9:42 ` Peng Fan
2019-09-06 17:21 ` [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Stephen Boyd
3 siblings, 0 replies; 6+ messages in thread
From: Peng Fan @ 2019-08-26 9:42 UTC (permalink / raw)
To: mturquette, sboyd, shawnguo, s.hauer, festevam
Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, Abel Vesa,
linux-clk, linux-arm-kernel, linux-kernel, Leonard Crestez,
Peng Fan
From: Peng Fan <peng.fan@nxp.com>
pll BYPASS bit should be kept inside pll driver for glitchless freq
setting following spec. If exposing the bit, that means pll driver and
clk driver has two paths to touch this bit, which is wrong.
So use EXT_BYPASS bit here.
And drop uneeded set parent, because EXT_BYPASS default is 0.
Suggested-by: Jacky Bai <ping.bai@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
V2:
New patch
drivers/clk/imx/clk-imx8mn.c | 32 ++++++++++----------------------
1 file changed, 10 insertions(+), 22 deletions(-)
diff --git a/drivers/clk/imx/clk-imx8mn.c b/drivers/clk/imx/clk-imx8mn.c
index f41116d59749..f767d18679ea 100644
--- a/drivers/clk/imx/clk-imx8mn.c
+++ b/drivers/clk/imx/clk-imx8mn.c
@@ -421,28 +421,16 @@ static int imx8mn_clocks_probe(struct platform_device *pdev)
clks[IMX8MN_SYS_PLL3] = imx_clk_pll14xx("sys_pll3", "sys_pll3_ref_sel", base + 0x114, &imx8mn_sys_pll);
/* PLL bypass out */
- clks[IMX8MN_AUDIO_PLL1_BYPASS] = imx_clk_mux_flags("audio_pll1_bypass", base, 4, 1, audio_pll1_bypass_sels, ARRAY_SIZE(audio_pll1_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_AUDIO_PLL2_BYPASS] = imx_clk_mux_flags("audio_pll2_bypass", base + 0x14, 4, 1, audio_pll2_bypass_sels, ARRAY_SIZE(audio_pll2_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_VIDEO_PLL1_BYPASS] = imx_clk_mux_flags("video_pll1_bypass", base + 0x28, 4, 1, video_pll1_bypass_sels, ARRAY_SIZE(video_pll1_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_DRAM_PLL_BYPASS] = imx_clk_mux_flags("dram_pll_bypass", base + 0x50, 4, 1, dram_pll_bypass_sels, ARRAY_SIZE(dram_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_GPU_PLL_BYPASS] = imx_clk_mux_flags("gpu_pll_bypass", base + 0x64, 4, 1, gpu_pll_bypass_sels, ARRAY_SIZE(gpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_VPU_PLL_BYPASS] = imx_clk_mux_flags("vpu_pll_bypass", base + 0x74, 4, 1, vpu_pll_bypass_sels, ARRAY_SIZE(vpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_ARM_PLL_BYPASS] = imx_clk_mux_flags("arm_pll_bypass", base + 0x84, 4, 1, arm_pll_bypass_sels, ARRAY_SIZE(arm_pll_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_SYS_PLL1_BYPASS] = imx_clk_mux_flags("sys_pll1_bypass", base + 0x94, 4, 1, sys_pll1_bypass_sels, ARRAY_SIZE(sys_pll1_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_SYS_PLL2_BYPASS] = imx_clk_mux_flags("sys_pll2_bypass", base + 0x104, 4, 1, sys_pll2_bypass_sels, ARRAY_SIZE(sys_pll2_bypass_sels), CLK_SET_RATE_PARENT);
- clks[IMX8MN_SYS_PLL3_BYPASS] = imx_clk_mux_flags("sys_pll3_bypass", base + 0x114, 4, 1, sys_pll3_bypass_sels, ARRAY_SIZE(sys_pll3_bypass_sels), CLK_SET_RATE_PARENT);
-
- /* unbypass all the plls */
- clk_set_parent(clks[IMX8MN_AUDIO_PLL1_BYPASS], clks[IMX8MN_AUDIO_PLL1]);
- clk_set_parent(clks[IMX8MN_AUDIO_PLL2_BYPASS], clks[IMX8MN_AUDIO_PLL2]);
- clk_set_parent(clks[IMX8MN_VIDEO_PLL1_BYPASS], clks[IMX8MN_VIDEO_PLL1]);
- clk_set_parent(clks[IMX8MN_DRAM_PLL_BYPASS], clks[IMX8MN_DRAM_PLL]);
- clk_set_parent(clks[IMX8MN_GPU_PLL_BYPASS], clks[IMX8MN_GPU_PLL]);
- clk_set_parent(clks[IMX8MN_VPU_PLL_BYPASS], clks[IMX8MN_VPU_PLL]);
- clk_set_parent(clks[IMX8MN_ARM_PLL_BYPASS], clks[IMX8MN_ARM_PLL]);
- clk_set_parent(clks[IMX8MN_SYS_PLL1_BYPASS], clks[IMX8MN_SYS_PLL1]);
- clk_set_parent(clks[IMX8MN_SYS_PLL2_BYPASS], clks[IMX8MN_SYS_PLL2]);
- clk_set_parent(clks[IMX8MN_SYS_PLL3_BYPASS], clks[IMX8MN_SYS_PLL3]);
+ clks[IMX8MN_AUDIO_PLL1_BYPASS] = imx_clk_mux_flags("audio_pll1_bypass", base, 16, 1, audio_pll1_bypass_sels, ARRAY_SIZE(audio_pll1_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_AUDIO_PLL2_BYPASS] = imx_clk_mux_flags("audio_pll2_bypass", base + 0x14, 16, 1, audio_pll2_bypass_sels, ARRAY_SIZE(audio_pll2_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_VIDEO_PLL1_BYPASS] = imx_clk_mux_flags("video_pll1_bypass", base + 0x28, 16, 1, video_pll1_bypass_sels, ARRAY_SIZE(video_pll1_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_DRAM_PLL_BYPASS] = imx_clk_mux_flags("dram_pll_bypass", base + 0x50, 16, 1, dram_pll_bypass_sels, ARRAY_SIZE(dram_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_GPU_PLL_BYPASS] = imx_clk_mux_flags("gpu_pll_bypass", base + 0x64, 28, 1, gpu_pll_bypass_sels, ARRAY_SIZE(gpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_VPU_PLL_BYPASS] = imx_clk_mux_flags("vpu_pll_bypass", base + 0x74, 28, 1, vpu_pll_bypass_sels, ARRAY_SIZE(vpu_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_ARM_PLL_BYPASS] = imx_clk_mux_flags("arm_pll_bypass", base + 0x84, 28, 1, arm_pll_bypass_sels, ARRAY_SIZE(arm_pll_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_SYS_PLL1_BYPASS] = imx_clk_mux_flags("sys_pll1_bypass", base + 0x94, 28, 1, sys_pll1_bypass_sels, ARRAY_SIZE(sys_pll1_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_SYS_PLL2_BYPASS] = imx_clk_mux_flags("sys_pll2_bypass", base + 0x104, 28, 1, sys_pll2_bypass_sels, ARRAY_SIZE(sys_pll2_bypass_sels), CLK_SET_RATE_PARENT);
+ clks[IMX8MN_SYS_PLL3_BYPASS] = imx_clk_mux_flags("sys_pll3_bypass", base + 0x114, 28, 1, sys_pll3_bypass_sels, ARRAY_SIZE(sys_pll3_bypass_sels), CLK_SET_RATE_PARENT);
/* PLL out gate */
clks[IMX8MN_AUDIO_PLL1_OUT] = imx_clk_gate("audio_pll1_out", "audio_pll1_bypass", base, 13);
--
2.16.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate
2019-08-26 9:42 [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Peng Fan
` (2 preceding siblings ...)
2019-08-26 9:42 ` [PATCH V2 4/4] clk: imx: imx8mn: " Peng Fan
@ 2019-09-06 17:21 ` Stephen Boyd
2019-09-09 3:40 ` Peng Fan
3 siblings, 1 reply; 6+ messages in thread
From: Stephen Boyd @ 2019-09-06 17:21 UTC (permalink / raw)
To: festevam, mturquette, s.hauer, shawnguo, Peng Fan
Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, Abel Vesa,
linux-clk, linux-arm-kernel, linux-kernel, Leonard Crestez,
Peng Fan
Quoting Peng Fan (2019-08-26 02:42:14)
> From: Peng Fan <peng.fan@nxp.com>
>
> According to PLL1443XA and PLL1416X spec,
> "When BYPASS is 0 and RESETB is changed from 0 to 1, FOUT starts to
> output unstable clock until lock time passes. PLL1416X/PLL1443XA may
> generate a glitch at FOUT."
>
> So set BYPASS when RESETB is changed from 0 to 1 to avoid glitch.
> In the end of set rate, BYPASS will be cleared.
>
> When prepare clock, also need to take care to avoid glitch. So
> we also follow Spec to set BYPASS before RESETB changed from 0 to 1.
> And add a check if the RESETB is already 0, directly return 0;
>
> Fixes: 8646d4dcc7fb ("clk: imx: Add PLLs driver for imx8mm soc")
> Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
Please make cover letters for multi-patch series.
^ permalink raw reply [flat|nested] 6+ messages in thread
* RE: [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate
2019-09-06 17:21 ` [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Stephen Boyd
@ 2019-09-09 3:40 ` Peng Fan
0 siblings, 0 replies; 6+ messages in thread
From: Peng Fan @ 2019-09-09 3:40 UTC (permalink / raw)
To: Stephen Boyd, festevam, mturquette, s.hauer, shawnguo
Cc: kernel, dl-linux-imx, Anson Huang, Jacky Bai, Abel Vesa,
linux-clk, linux-arm-kernel, linux-kernel, Leonard Crestez
Hi Stephen,
> Subject: Re: [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate
>
> Quoting Peng Fan (2019-08-26 02:42:14)
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > According to PLL1443XA and PLL1416X spec, "When BYPASS is 0 and RESETB
> > is changed from 0 to 1, FOUT starts to output unstable clock until
> > lock time passes. PLL1416X/PLL1443XA may generate a glitch at FOUT."
> >
> > So set BYPASS when RESETB is changed from 0 to 1 to avoid glitch.
> > In the end of set rate, BYPASS will be cleared.
> >
> > When prepare clock, also need to take care to avoid glitch. So we also
> > follow Spec to set BYPASS before RESETB changed from 0 to 1.
> > And add a check if the RESETB is already 0, directly return 0;
> >
> > Fixes: 8646d4dcc7fb ("clk: imx: Add PLLs driver for imx8mm soc")
> > Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
>
> Please make cover letters for multi-patch series.
Just sent out v3 to include cover-letter, no other changes.
Thanks,
Peng.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-09-09 3:40 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-08-26 9:42 [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Peng Fan
2019-08-26 9:42 ` [PATCH V2 2/4] clk: imx: clk-pll14xx: unbypass PLL by default Peng Fan
2019-08-26 9:42 ` [PATCH V2 3/4] clk: imx: imx8mm: fix pll mux bit Peng Fan
2019-08-26 9:42 ` [PATCH V2 4/4] clk: imx: imx8mn: " Peng Fan
2019-09-06 17:21 ` [PATCH V2 1/4] clk: imx: pll14xx: avoid glitch when set rate Stephen Boyd
2019-09-09 3:40 ` Peng Fan
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