hw/misc/bcm2835_cprman: add the DSI0HSCK multiplexer

This simple mux sits between the PLL channels and the DSI0E and DSI0P
clock muxes. This mux selects between PLLA-DSI0 and PLLD-DSI0 channel
and outputs the selected signal to source number 4 of DSI0E/P clock
muxes. It is controlled by the cm_dsi0hsck register.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Luc Michel <luc@lmichel.fr>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 21 insertions, 0 deletions

diff --git a/include/hw/misc/bcm2835_cprman.h b/include/hw/misc/bcm2835_cprman.h
index 0fc8f68..3df4cee 100644
--- a/include/hw/misc/bcm2835_cprman.h
+++ b/include/hw/misc/bcm2835_cprman.h
@@ -174,6 +174,20 @@ typedef struct CprmanClockMuxState {
     struct CprmanClockMuxState *backref[CPRMAN_NUM_CLOCK_MUX_SRC];
 } CprmanClockMuxState;
 
+typedef struct CprmanDsi0HsckMuxState {
+    /*< private >*/
+    DeviceState parent_obj;
+
+    /*< public >*/
+    CprmanClockMux id;
+
+    uint32_t *reg_cm;
+
+    Clock *plla_in;
+    Clock *plld_in;
+    Clock *out;
+} CprmanDsi0HsckMuxState;
+
 struct BCM2835CprmanState {
     /*< private >*/
     SysBusDevice parent_obj;
@@ -184,6 +198,7 @@ struct BCM2835CprmanState {
     CprmanPllState plls[CPRMAN_NUM_PLL];
     CprmanPllChannelState channels[CPRMAN_NUM_PLL_CHANNEL];
     CprmanClockMuxState clock_muxes[CPRMAN_NUM_CLOCK_MUX];
+    CprmanDsi0HsckMuxState dsi0hsck_mux;
 
     uint32_t regs[CPRMAN_NUM_REGS];
     uint32_t xosc_freq;
diff --git a/include/hw/misc/bcm2835_cprman_internals.h b/include/hw/misc/bcm2835_cprman_internals.h
index 0305448..a6e7990 100644
--- a/include/hw/misc/bcm2835_cprman_internals.h
+++ b/include/hw/misc/bcm2835_cprman_internals.h
@@ -15,6 +15,7 @@
 #define TYPE_CPRMAN_PLL "bcm2835-cprman-pll"
 #define TYPE_CPRMAN_PLL_CHANNEL "bcm2835-cprman-pll-channel"
 #define TYPE_CPRMAN_CLOCK_MUX "bcm2835-cprman-clock-mux"
+#define TYPE_CPRMAN_DSI0HSCK_MUX "bcm2835-cprman-dsi0hsck-mux"
 
 DECLARE_INSTANCE_CHECKER(CprmanPllState, CPRMAN_PLL,
                          TYPE_CPRMAN_PLL)
@@ -22,6 +23,8 @@ DECLARE_INSTANCE_CHECKER(CprmanPllChannelState, CPRMAN_PLL_CHANNEL,
                          TYPE_CPRMAN_PLL_CHANNEL)
 DECLARE_INSTANCE_CHECKER(CprmanClockMuxState, CPRMAN_CLOCK_MUX,
                          TYPE_CPRMAN_CLOCK_MUX)
+DECLARE_INSTANCE_CHECKER(CprmanDsi0HsckMuxState, CPRMAN_DSI0HSCK_MUX,
+                         TYPE_CPRMAN_DSI0HSCK_MUX)
 
 /* Register map */
 
@@ -223,6 +226,9 @@ REG32(CM_LOCK, 0x114)
     FIELD(CM_LOCK, FLOCKB, 9, 1)
     FIELD(CM_LOCK, FLOCKA, 8, 1)
 
+REG32(CM_DSI0HSCK, 0x120)
+    FIELD(CM_DSI0HSCK, SELPLLD, 0, 1)
+
 /*
  * This field is common to all registers. Each register write value must match
  * the CPRMAN_PASSWORD magic value in its 8 MSB.