clk: imx6: Add SPDIF_GCLK clock in clock tree

Correct SPDIF clock setting issue in clock tree, the SPDIF_GCLK is also
one clock of SPDIF, which is missed before.

We found an issue that imx can't enter low power mode with spdif
if IMX6x_CLK_SPDIF is used as the core clock of spdif. Because
spdif driver will register IMX6x_CLK_SPDIF clock to regmap, regmap will do
clk_prepare in init function, then IMX6x_CLK_SPDIF clock is prepared in probe,
so its parent clock (PLL clock) is prepared, the prepare operation of
PLL clock is to enable the clock. But I.MX needs all PLL clock is disabled,
then it can enter low power mode.

So we can't use IMX6x_CLK_SPDIF as the core clock of spdif, the correct spdif
core clock is SPDIF_GCLK, which share same gate bit with IMX6x_CLK_SPDIF clock.
SPDIF_GCLK's parent clock is ipg clock.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

6 files changed, 13 insertions, 5 deletions

diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c
index e9ba018ac6a3..c1935081d34a 100644
--- a/drivers/clk/imx/clk-imx6q.c
+++ b/drivers/clk/imx/clk-imx6q.c
@@ -119,6 +119,7 @@ static unsigned int share_count_ssi1;
 static unsigned int share_count_ssi2;
 static unsigned int share_count_ssi3;
 static unsigned int share_count_mipi_core_cfg;
+static unsigned int share_count_spdif;
 
 static inline int clk_on_imx6q(void)
 {
@@ -462,7 +463,8 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
         clk[IMX6QDL_CLK_SATA]         = imx_clk_gate2("sata",          "ahb",               base + 0x7c, 4);
         clk[IMX6QDL_CLK_SDMA]         = imx_clk_gate2("sdma",          "ahb",               base + 0x7c, 6);
         clk[IMX6QDL_CLK_SPBA]         = imx_clk_gate2("spba",          "ipg",               base + 0x7c, 12);
-        clk[IMX6QDL_CLK_SPDIF]        = imx_clk_gate2("spdif",         "spdif_podf",        base + 0x7c, 14);
+        clk[IMX6QDL_CLK_SPDIF]        = imx_clk_gate2_shared("spdif",     "spdif_podf",     base + 0x7c, 14, &share_count_spdif);
+        clk[IMX6QDL_CLK_SPDIF_GCLK]   = imx_clk_gate2_shared("spdif_gclk", "ipg",           base + 0x7c, 14, &share_count_spdif);
         clk[IMX6QDL_CLK_SSI1_IPG]     = imx_clk_gate2_shared("ssi1_ipg",      "ipg",        base + 0x7c, 18, &share_count_ssi1);
         clk[IMX6QDL_CLK_SSI2_IPG]     = imx_clk_gate2_shared("ssi2_ipg",      "ipg",        base + 0x7c, 20, &share_count_ssi2);
         clk[IMX6QDL_CLK_SSI3_IPG]     = imx_clk_gate2_shared("ssi3_ipg",      "ipg",        base + 0x7c, 22, &share_count_ssi3);
diff --git a/drivers/clk/imx/clk-imx6sl.c b/drivers/clk/imx/clk-imx6sl.c
index 3c3333faae8e..1be6230a07af 100644
--- a/drivers/clk/imx/clk-imx6sl.c
+++ b/drivers/clk/imx/clk-imx6sl.c
@@ -97,6 +97,7 @@ static struct clk_div_table video_div_table[] = {
 static unsigned int share_count_ssi1;
 static unsigned int share_count_ssi2;
 static unsigned int share_count_ssi3;
+static unsigned int share_count_spdif;
 
 static struct clk *clks[IMX6SL_CLK_END];
 static struct clk_onecell_data clk_data;
@@ -397,7 +398,8 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node)
         clks[IMX6SL_CLK_PWM4]         = imx_clk_gate2("pwm4",         "perclk",            base + 0x78, 22);
         clks[IMX6SL_CLK_SDMA]         = imx_clk_gate2("sdma",         "ipg",               base + 0x7c, 6);
         clks[IMX6SL_CLK_SPBA]         = imx_clk_gate2("spba",         "ipg",               base + 0x7c, 12);
-        clks[IMX6SL_CLK_SPDIF]        = imx_clk_gate2("spdif",        "spdif0_podf",       base + 0x7c, 14);
+        clks[IMX6SL_CLK_SPDIF]        = imx_clk_gate2_shared("spdif",     "spdif0_podf",   base + 0x7c, 14, &share_count_spdif);
+        clks[IMX6SL_CLK_SPDIF_GCLK]   = imx_clk_gate2_shared("spdif_gclk",  "ipg",         base + 0x7c, 14, &share_count_spdif);
         clks[IMX6SL_CLK_SSI1_IPG]     = imx_clk_gate2_shared("ssi1_ipg",     "ipg",        base + 0x7c, 18, &share_count_ssi1);
         clks[IMX6SL_CLK_SSI2_IPG]     = imx_clk_gate2_shared("ssi2_ipg",     "ipg",        base + 0x7c, 20, &share_count_ssi2);
         clks[IMX6SL_CLK_SSI3_IPG]     = imx_clk_gate2_shared("ssi3_ipg",     "ipg",        base + 0x7c, 22, &share_count_ssi3);
diff --git a/drivers/clk/imx/clk-imx6sx.c b/drivers/clk/imx/clk-imx6sx.c
index f0ad8bbc12f8..fea125eb4330 100644
--- a/drivers/clk/imx/clk-imx6sx.c
+++ b/drivers/clk/imx/clk-imx6sx.c
@@ -460,6 +460,7 @@ static void __init imx6sx_clocks_init(struct device_node *ccm_node)
         clks[IMX6SX_CLK_SPBA]         = imx_clk_gate2("spba",          "ipg",               base + 0x7c, 12);
         clks[IMX6SX_CLK_AUDIO]        = imx_clk_gate2_shared("audio",  "audio_podf",        base + 0x7c, 14, &share_count_audio);
         clks[IMX6SX_CLK_SPDIF]        = imx_clk_gate2_shared("spdif",  "spdif_podf",        base + 0x7c, 14, &share_count_audio);
+        clks[IMX6SX_CLK_SPDIF_GCLK]   = imx_clk_gate2_shared("spdif_gclk",    "ipg",        base + 0x7c, 14, &share_count_audio);
         clks[IMX6SX_CLK_SSI1_IPG]     = imx_clk_gate2_shared("ssi1_ipg",      "ipg",        base + 0x7c, 18, &share_count_ssi1);
         clks[IMX6SX_CLK_SSI2_IPG]     = imx_clk_gate2_shared("ssi2_ipg",      "ipg",        base + 0x7c, 20, &share_count_ssi2);
         clks[IMX6SX_CLK_SSI3_IPG]     = imx_clk_gate2_shared("ssi3_ipg",      "ipg",        base + 0x7c, 22, &share_count_ssi3);
diff --git a/include/dt-bindings/clock/imx6qdl-clock.h b/include/dt-bindings/clock/imx6qdl-clock.h
index 8de173ff19f3..77985cc43316 100644
--- a/include/dt-bindings/clock/imx6qdl-clock.h
+++ b/include/dt-bindings/clock/imx6qdl-clock.h
@@ -254,6 +254,7 @@
 #define IMX6QDL_CLK_CAAM_MEM                    241
 #define IMX6QDL_CLK_CAAM_ACLK                   242
 #define IMX6QDL_CLK_CAAM_IPG                    243
-#define IMX6QDL_CLK_END                         244
+#define IMX6QDL_CLK_SPDIF_GCLK                  244
+#define IMX6QDL_CLK_END                         245
 
 #endif /* __DT_BINDINGS_CLOCK_IMX6QDL_H */
diff --git a/include/dt-bindings/clock/imx6sl-clock.h b/include/dt-bindings/clock/imx6sl-clock.h
index 9ce4e421096f..e14573e293c5 100644
--- a/include/dt-bindings/clock/imx6sl-clock.h
+++ b/include/dt-bindings/clock/imx6sl-clock.h
@@ -174,6 +174,7 @@
 #define IMX6SL_CLK_SSI1_IPG             161
 #define IMX6SL_CLK_SSI2_IPG             162
 #define IMX6SL_CLK_SSI3_IPG             163
-#define IMX6SL_CLK_END                  164
+#define IMX6SL_CLK_SPDIF_GCLK           164
+#define IMX6SL_CLK_END                  165
 
 #endif /* __DT_BINDINGS_CLOCK_IMX6SL_H */
diff --git a/include/dt-bindings/clock/imx6sx-clock.h b/include/dt-bindings/clock/imx6sx-clock.h
index 995709119ec5..36f0324902a5 100644
--- a/include/dt-bindings/clock/imx6sx-clock.h
+++ b/include/dt-bindings/clock/imx6sx-clock.h
@@ -274,6 +274,7 @@
 #define IMX6SX_PLL5_BYPASS              261
 #define IMX6SX_PLL6_BYPASS              262
 #define IMX6SX_PLL7_BYPASS              263
-#define IMX6SX_CLK_CLK_END              264
+#define IMX6SX_CLK_SPDIF_GCLK           264
+#define IMX6SX_CLK_CLK_END              265
 
 #endif /* __DT_BINDINGS_CLOCK_IMX6SX_H */