From: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
Add the missing dsi clocks using the currently "best known"
parent-mux available for these clocks.
Signed-off-by: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
---
drivers/clk/bcm/clk-bcm2835.c | 88 +++++++++++++++++++++++++++++++++++
include/dt-bindings/clock/bcm2835.h | 4 ++
2 files changed, 92 insertions(+)
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index aec9b22..91a6086 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -199,6 +199,8 @@
# define CM_LOCK_FLOCKA BIT(8)
#define CM_EVENT 0x118
+#define CM_DSI0HSCK 0x120
+# define CM_DSI0HSCK_SELPLLD BIT(0)
#define CM_DSI1ECTL 0x158
#define CM_DSI1EDIV 0x15c
#define CM_DSI1PCTL 0x160
@@ -1483,10 +1485,68 @@ static const char * const bcm2835_clock_ccp2_parents[] = {
.parents = bcm2835_clock_ccp2_parents, \
__VA_ARGS__)
+/* dsi0 parent mux */
+static const char * const bcm2835_clock_dsi0_parents[] = {
+ "gnd",
+ "xosc",
+ "testdebug0",
+ "testdebug1",
+ /*
+ * more parent clocks, but unknown at this time
+ * the current definition follows the "common" pattern
+ * that already applies to all the other parent mux
+ * in so far as all the known mux contain gnd, xosc, testdebug0/1
+ * as the first 3 entries.
+ * The mux should contain "plla_dsi0/plld_dsi0" at one position.
+ * the selection which pll is used depends on CM_DSI0HSCK_SELPLLD
+ * here some possible candidates for the next parents in the list.
+ * plla_core/per or plla_dsi0/plld_dsi0
+ * pllc_core/per
+ * plld_core/per
+ * pllh_aux/pix
+ * maybe plla_dsi0/plld_dsi0 (depends on CM_DSI0HSCK_SELPLLD)
+ * up to 16 different parents
+ */
+};
+
+#define REGISTER_DSI0_CLK(...) REGISTER_CLK( \
+ .num_mux_parents = ARRAY_SIZE(bcm2835_clock_dsi0_parents), \
+ .parents = bcm2835_clock_dsi0_parents, \
+ __VA_ARGS__)
+
+/* dsi1 parent mux */
+static const char * const bcm2835_clock_dsi1_parents[] = {
+ "gnd",
+ "xosc",
+ "testdebug0",
+ "testdebug1",
+ /*
+ * more parent clocks, but unknown at this time
+ * the current definition follows the "common" pattern
+ * that already applies to all the other parent mux
+ * in so far as all the known mux contain gnd, xosc, testdebug0/1
+ * as the first 3 entries.
+ * The mux should contain "plld_dsi1" at one position.
+ * here some possible candidates for the next parents in the list.
+ * plla_core/per
+ * pllc_core/per
+ * plld_core/per or plld_dsi1
+ * pllh_aux/pix
+ * maybe plld_dsi1
+ * up to 16 different parents
+ */
+};
+
+#define REGISTER_DSI1_CLK(...) REGISTER_CLK( \
+ .num_mux_parents = ARRAY_SIZE(bcm2835_clock_dsi1_parents), \
+ .parents = bcm2835_clock_dsi1_parents, \
+ __VA_ARGS__)
+
/*
* the real definition of all the pll, pll_dividers and clocks
* these make use of the above REGISTER_* macros
*/
+
static const struct bcm2835_clk_desc clk_desc_array[] = {
/* the PLL + PLL dividers */
@@ -1950,6 +2010,34 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
.int_bits = 1,
.frac_bits = 0),
+ /* dsi clocks */
+ [BCM2835_CLOCK_DSI0E] = REGISTER_DSI0_CLK(
+ .name = "dsi0e",
+ .ctl_reg = CM_DSI0ECTL,
+ .div_reg = CM_DSI0EDIV,
+ .int_bits = 4,
+ .frac_bits = 8),
+ [BCM2835_CLOCK_DSI0_IMAGE] = REGISTER_DSI0_CLK(
+ /* this is in principle a gate with a 4 bit mux */
+ .name = "dsi0_image",
+ .ctl_reg = CM_DSI0PCTL,
+ .div_reg = CM_DSI0PDIV,
+ .int_bits = 1,
+ .frac_bits = 0),
+ [BCM2835_CLOCK_DSI1E] = REGISTER_DSI1_CLK(
+ .name = "dsi1e",
+ .ctl_reg = CM_DSI1ECTL,
+ .div_reg = CM_DSI1EDIV,
+ .int_bits = 4,
+ .frac_bits = 8),
+ [BCM2835_CLOCK_DSI1_IMAGE] = REGISTER_DSI1_CLK(
+ /* this is in principle a gate with a 4 bit mux */
+ .name = "dsi1_image",
+ .ctl_reg = CM_DSI1PCTL,
+ .div_reg = CM_DSI1PDIV,
+ .int_bits = 1,
+ .frac_bits = 0),
+
/* the gates */
/*
diff --git a/include/dt-bindings/clock/bcm2835.h b/include/dt-bindings/clock/bcm2835.h
index 1d70088..9254c78 100644
--- a/include/dt-bindings/clock/bcm2835.h
+++ b/include/dt-bindings/clock/bcm2835.h
@@ -66,3 +66,7 @@
#define BCM2835_CLOCK_CAM0 48
#define BCM2835_CLOCK_CAM1 49
#define BCM2835_CLOCK_CCP2 50
+#define BCM2835_CLOCK_DSI0E 51
+#define BCM2835_CLOCK_DSI0_IMAGE 52
+#define BCM2835_CLOCK_DSI1E 53
+#define BCM2835_CLOCK_DSI1_IMAGE 54
--
1.7.10.4
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