From: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
Add the missing "ARM" clock to the clock framework.
This clock is essentially a gate clock but with a
16 channel mux.
We assume this is a mux that uses PLLB_ARM, so a dedicated
mux for arm was created.
Signed-off-by: Martin Sperl <kernel@xxxxxxxxxxxxxxxx>
---
drivers/clk/bcm/clk-bcm2835.c | 34 +++++++++++++++++++++++++++++++++-
include/dt-bindings/clock/bcm2835.h | 1 +
2 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index 91a6086..12ce209 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -118,6 +118,7 @@
#define CM_SDCCTL 0x1a8
#define CM_SDCDIV 0x1ac
#define CM_ARMCTL 0x1b0
+#define CM_ARMDIV 0x1b4
#define CM_AVEOCTL 0x1b8
#define CM_AVEODIV 0x1bc
#define CM_EMMCCTL 0x1c0
@@ -1542,11 +1543,33 @@ static const char * const bcm2835_clock_dsi1_parents[] = {
.parents = bcm2835_clock_dsi1_parents, \
__VA_ARGS__)
+/* arm parent mux */
+static const char * const bcm2835_clock_arm_parents[] = {
+ "gnd",
+ "xosc",
+ "testdebug0",
+ "testdebug1",
+ /*
+ * see comments for dsi0 for possible candidates
+ * should contain "pllb_arm" at one position
+ * plla_core/per
+ * pllb_arm or pllb_core/per
+ * pllc_core/per
+ * plld_core/per
+ * pllh_aux/pix
+ * up to 16 different parents
+ */
+};
+
+#define REGISTER_ARM_CLK(...) REGISTER_CLK( \
+ .num_mux_parents = ARRAY_SIZE(bcm2835_clock_arm_parents), \
+ .parents = bcm2835_clock_arm_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 */
@@ -2038,6 +2061,15 @@ static const struct bcm2835_clk_desc clk_desc_array[] = {
.int_bits = 1,
.frac_bits = 0),
+ /* arm clocks */
+ [BCM2835_CLOCK_DSI1_IMAGE] = REGISTER_ARM_CLK(
+ /* this is in principle a gate with a 4 bit mux */
+ .name = "arm",
+ .ctl_reg = CM_ARMCTL,
+ .div_reg = CM_ARMDIV,
+ .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 9254c78..109086e 100644
--- a/include/dt-bindings/clock/bcm2835.h
+++ b/include/dt-bindings/clock/bcm2835.h
@@ -70,3 +70,4 @@
#define BCM2835_CLOCK_DSI0_IMAGE 52
#define BCM2835_CLOCK_DSI1E 53
#define BCM2835_CLOCK_DSI1_IMAGE 54
+#define BCM2835_CLOCK_ARM 55
--
1.7.10.4
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