[PATCH v2] S5PV210 Correct clock register properties
MyungJoo Ham
myungjoo.ham at samsung.com
Tue Jun 22 04:05:51 EDT 2010
Note that this patch revises and merges the two previous patches:
[PATCH] S5PV210 Correct clock register properties
[PATCH] S5PV210 Correct clock source control register properties
1. Corrected shift values of I2S and UART clocks (CLK_GATE_IP3), which were
defined incorrectly.
2. Corrected shift values of sclk_audio, uclk1, sclk_fimd, sclk_mmc,
sclk_spi, sclk_pwm, which had duplicated .enable/.ctrlbit with their
twins defined in struct clk init_clocks_disable[] and struct clk
init_clocks[]. We've changed their .enable/.ctrlbit to use CLK_SRC_MASK
register to avoid the duplicated clock problem described below.
--- Duplicated Clock Problem ---
Please note that each clock definition should access different control
register; otherwise, the system may suffer lockups. For example, if we
have two clock definitions "a" and "b" which access the same register
(and the shift value). Then, when we do:
module A
clk = clk_get("a");
clk->clk_enable(clk);
module B (context switch)
clk = clk_get("b");
clk->clk_enable(clk);
do something with clk.
clk->clk_disable(clk);
module A (context switch)
do something with clk
* At this point, the system may hang.
Therefore, there should be no clock definitions with the same contol
register/shift. If we need to create "aliases", then, creating child
clocks sharing the clock should be fine.
Signed-off-by: MyungJoo Ham <myungjoo.ham at samsung.com>
---
arch/arm/mach-s5pv210/clock.c | 72 ++++++++++++++++++++--------------------
1 files changed, 36 insertions(+), 36 deletions(-)
diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
index 154bca4..10a9f84 100644
--- a/arch/arm/mach-s5pv210/clock.c
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -406,13 +406,13 @@ static struct clk init_clocks_disable[] = {
.id = 0,
.parent = &clk_p,
.enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1<<4),
+ .ctrlbit = (1<<5),
}, {
.name = "i2s_v32",
.id = 1,
.parent = &clk_p,
.enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1<<4),
+ .ctrlbit = (1<<6),
}
};
@@ -429,25 +429,25 @@ static struct clk init_clocks[] = {
.id = 0,
.parent = &clk_pclk_psys.clk,
.enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1<<7),
+ .ctrlbit = (1<<17),
}, {
.name = "uart",
.id = 1,
.parent = &clk_pclk_psys.clk,
.enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1<<8),
+ .ctrlbit = (1<<18),
}, {
.name = "uart",
.id = 2,
.parent = &clk_pclk_psys.clk,
.enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1<<9),
+ .ctrlbit = (1<<19),
}, {
.name = "uart",
.id = 3,
.parent = &clk_pclk_psys.clk,
.enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1<<10),
+ .ctrlbit = (1<<20),
},
};
@@ -565,8 +565,8 @@ static struct clksrc_clk clk_sclk_audio0 = {
.clk = {
.name = "sclk_audio",
.id = 0,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 4),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 24),
},
.sources = &clkset_sclk_audio0,
.reg_src = { .reg = S5P_CLK_SRC6, .shift = 0, .size = 4 },
@@ -594,8 +594,8 @@ static struct clksrc_clk clk_sclk_audio1 = {
.clk = {
.name = "sclk_audio",
.id = 1,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 5),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 25),
},
.sources = &clkset_sclk_audio1,
.reg_src = { .reg = S5P_CLK_SRC6, .shift = 4, .size = 4 },
@@ -623,8 +623,8 @@ static struct clksrc_clk clk_sclk_audio2 = {
.clk = {
.name = "sclk_audio",
.id = 2,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 6),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 26),
},
.sources = &clkset_sclk_audio2,
.reg_src = { .reg = S5P_CLK_SRC6, .shift = 8, .size = 4 },
@@ -680,8 +680,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "uclk1",
.id = 0,
- .ctrlbit = (1<<17),
- .enable = s5pv210_clk_ip3_ctrl,
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 12),
},
.sources = &clkset_uart,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 16, .size = 4 },
@@ -690,8 +690,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "uclk1",
.id = 1,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 18),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 13),
},
.sources = &clkset_uart,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 20, .size = 4 },
@@ -700,8 +700,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "uclk1",
.id = 2,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 19),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 14),
},
.sources = &clkset_uart,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 24, .size = 4 },
@@ -710,8 +710,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "uclk1",
.id = 3,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 20),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 15),
},
.sources = &clkset_uart,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 28, .size = 4 },
@@ -784,8 +784,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_fimd",
.id = -1,
- .enable = s5pv210_clk_ip1_ctrl,
- .ctrlbit = (1 << 0),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 5),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC1, .shift = 20, .size = 4 },
@@ -794,8 +794,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_mmc",
.id = 0,
- .enable = s5pv210_clk_ip2_ctrl,
- .ctrlbit = (1 << 16),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 8),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 0, .size = 4 },
@@ -804,8 +804,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_mmc",
.id = 1,
- .enable = s5pv210_clk_ip2_ctrl,
- .ctrlbit = (1 << 17),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 9),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 4, .size = 4 },
@@ -814,8 +814,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_mmc",
.id = 2,
- .enable = s5pv210_clk_ip2_ctrl,
- .ctrlbit = (1 << 18),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 10),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 8, .size = 4 },
@@ -824,8 +824,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_mmc",
.id = 3,
- .enable = s5pv210_clk_ip2_ctrl,
- .ctrlbit = (1 << 19),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 11),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 12, .size = 4 },
@@ -874,8 +874,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_spi",
.id = 0,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 12),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 16),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC5, .shift = 0, .size = 4 },
@@ -884,8 +884,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_spi",
.id = 1,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 13),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 17),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC5, .shift = 4, .size = 4 },
@@ -904,8 +904,8 @@ static struct clksrc_clk clksrcs[] = {
.clk = {
.name = "sclk_pwm",
.id = -1,
- .enable = s5pv210_clk_ip3_ctrl,
- .ctrlbit = (1 << 23),
+ .enable = s5pv210_clk_mask0_ctrl,
+ .ctrlbit = (1 << 19),
},
.sources = &clkset_group2,
.reg_src = { .reg = S5P_CLK_SRC5, .shift = 12, .size = 4 },
--
1.6.3.3
More information about the linux-arm-kernel
mailing list