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ARM: S5PV210: Correct clock register properties
authorMyungJoo Ham <myungjoo.ham@samsung.com>
Sat, 26 Jun 2010 08:21:50 +0000 (17:21 +0900)
committerKukjin Kim <kgene.kim@samsung.com>
Mon, 5 Jul 2010 07:01:04 +0000 (16:01 +0900)
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.

NOTE: 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.

3. Corrected other sclk_* shift values and access registers.

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: minor title and message fix]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
arch/arm/mach-s5pv210/clock.c patch | blob | history

diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
index 154bca4..af91fef 100644 (file)
--- a/arch/arm/mach-s5pv210/clock.c
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -183,6 +183,11 @@ static int s5pv210_clk_mask0_ctrl(struct clk *clk, int enable)
        return s5p_gatectrl(S5P_CLK_SRC_MASK0, clk, enable);
 }
 
+static int s5pv210_clk_mask1_ctrl(struct clk *clk, int enable)
+{
+       return s5p_gatectrl(S5P_CLK_SRC_MASK1, clk, enable);
+}
+
 static struct clk clk_sclk_hdmi27m = {
        .name           = "sclk_hdmi27m",
        .id             = -1,
@@ -406,14 +411,14 @@ 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),
+       },
 };
 
 static struct clk init_clocks[] = {
@@ -429,25 +434,25 @@ 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),
        },
 };
 
@@ -497,8 +502,8 @@ static struct clksrc_clk clk_sclk_dac = {
        .clk            = {
                .name           = "sclk_dac",
                .id             = -1,
-               .ctrlbit        = (1 << 10),
-               .enable         = s5pv210_clk_ip1_ctrl,
+               .enable         = s5pv210_clk_mask0_ctrl,
+               .ctrlbit        = (1 << 2),
        },
        .sources        = &clkset_sclk_dac,
        .reg_src        = { .reg = S5P_CLK_SRC1, .shift = 8, .size = 1 },
@@ -527,8 +532,8 @@ static struct clksrc_clk clk_sclk_hdmi = {
        .clk            = {
                .name           = "sclk_hdmi",
                .id             = -1,
-               .enable         = s5pv210_clk_ip1_ctrl,
-               .ctrlbit        = (1 << 11),
+               .enable         = s5pv210_clk_mask0_ctrl,
+               .ctrlbit        = (1 << 0),
        },
        .sources        = &clkset_sclk_hdmi,
        .reg_src        = { .reg = S5P_CLK_SRC1, .shift = 0, .size = 1 },
@@ -565,8 +570,8 @@ 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 +599,8 @@ 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 +628,8 @@ 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 +685,8 @@ 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 +695,8 @@ 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 +705,8 @@ 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 +715,8 @@ 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 },
@@ -720,8 +725,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk    = {
                        .name           = "sclk_mixer",
                        .id             = -1,
-                       .enable         = s5pv210_clk_ip1_ctrl,
-                       .ctrlbit        = (1 << 9),
+                       .enable         = s5pv210_clk_mask0_ctrl,
+                       .ctrlbit        = (1 << 1),
                },
                .sources = &clkset_sclk_mixer,
                .reg_src = { .reg = S5P_CLK_SRC1, .shift = 4, .size = 1 },
@@ -738,8 +743,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk    = {
                        .name           = "sclk_fimc",
                        .id             = 0,
-                       .enable         = s5pv210_clk_ip0_ctrl,
-                       .ctrlbit        = (1 << 24),
+                       .enable         = s5pv210_clk_mask1_ctrl,
+                       .ctrlbit        = (1 << 2),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC3, .shift = 12, .size = 4 },
@@ -748,8 +753,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk    = {
                        .name           = "sclk_fimc",
                        .id             = 1,
-                       .enable         = s5pv210_clk_ip0_ctrl,
-                       .ctrlbit        = (1 << 25),
+                       .enable         = s5pv210_clk_mask1_ctrl,
+                       .ctrlbit        = (1 << 3),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC3, .shift = 16, .size = 4 },
@@ -758,8 +763,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk    = {
                        .name           = "sclk_fimc",
                        .id             = 2,
-                       .enable         = s5pv210_clk_ip0_ctrl,
-                       .ctrlbit        = (1 << 26),
+                       .enable         = s5pv210_clk_mask1_ctrl,
+                       .ctrlbit        = (1 << 4),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC3, .shift = 20, .size = 4 },
@@ -768,6 +773,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk            = {
                        .name           = "sclk_cam",
                        .id             = 0,
+                       .enable         = s5pv210_clk_mask0_ctrl,
+                       .ctrlbit        = (1 << 3),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC1, .shift = 12, .size = 4 },
@@ -776,6 +783,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk            = {
                        .name           = "sclk_cam",
                        .id             = 1,
+                       .enable         = s5pv210_clk_mask0_ctrl,
+                       .ctrlbit        = (1 << 4),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC1, .shift = 16, .size = 4 },
@@ -784,8 +793,8 @@ 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 +803,8 @@ 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 +813,8 @@ 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 +823,8 @@ 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 +833,8 @@ 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 },
@@ -864,8 +873,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk            = {
                        .name           = "sclk_csis",
                        .id             = -1,
-                       .enable         = s5pv210_clk_ip0_ctrl,
-                       .ctrlbit        = (1 << 31),
+                       .enable         = s5pv210_clk_mask0_ctrl,
+                       .ctrlbit        = (1 << 6),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC1, .shift = 24, .size = 4 },
@@ -874,8 +883,8 @@ 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 +893,8 @@ 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 },
@@ -894,8 +903,8 @@ static struct clksrc_clk clksrcs[] = {
                .clk            = {
                        .name           = "sclk_pwi",
                        .id             = -1,
-                       .enable         = &s5pv210_clk_ip4_ctrl,
-                       .ctrlbit        = (1 << 2),
+                       .enable         = s5pv210_clk_mask0_ctrl,
+                       .ctrlbit        = (1 << 29),
                },
                .sources = &clkset_group2,
                .reg_src = { .reg = S5P_CLK_SRC6, .shift = 20, .size = 4 },
@@ -904,8 +913,8 @@ 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 },
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