diff mbox

i.MX: split the GPT timer implementation in a per SOC definition.

Message ID 1467325619-8374-1-git-send-email-jcd@tribudubois.net (mailing list archive)
State New, archived
Headers show

Commit Message

Jean-Christophe Dubois June 30, 2016, 10:26 p.m. UTC
in various Freescale SOC, the GPT timers can be configured to select its
input clock.

Depending on the SOC the set of available input clocks may vary.

The actual single GPT definition was no good enough and because of it
booting the sabrelite board with a i.MX6DL device tree would fail
because of an incorrect input clock definition for the i.MX6DL SOC.

This patch fixes the i.MX6DL boot failure by adding the ability to
define a different set of input clocks depending on the considered SOC.

A different class has been defined for i.MX25, i.MX31 and i.MX6 each with
its specific set of input clocks.

The patch has been tested by booting KZM, i.MX25 PDK, i.MX6Q sabrelite
and i.MX6DL sabrelite.

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
---
 hw/arm/fsl-imx25.c         |  2 +-
 hw/arm/fsl-imx31.c         |  2 +-
 hw/arm/fsl-imx6.c          |  2 +-
 hw/misc/imx6_ccm.c         |  6 ++++
 hw/timer/imx_gpt.c         | 69 ++++++++++++++++++++++++++++++++++++++++++----
 include/hw/misc/imx_ccm.h  |  5 +++-
 include/hw/timer/imx_gpt.h |  9 +++++-
 7 files changed, 84 insertions(+), 11 deletions(-)

Comments

Peter Maydell July 5, 2016, 1:42 p.m. UTC | #1
On 30 June 2016 at 23:26, Jean-Christophe Dubois <jcd@tribudubois.net> wrote:
> in various Freescale SOC, the GPT timers can be configured to select its
> input clock.
>
> Depending on the SOC the set of available input clocks may vary.
>
> The actual single GPT definition was no good enough and because of it
> booting the sabrelite board with a i.MX6DL device tree would fail
> because of an incorrect input clock definition for the i.MX6DL SOC.
>
> This patch fixes the i.MX6DL boot failure by adding the ability to
> define a different set of input clocks depending on the considered SOC.
>
> A different class has been defined for i.MX25, i.MX31 and i.MX6 each with
> its specific set of input clocks.
>
> The patch has been tested by booting KZM, i.MX25 PDK, i.MX6Q sabrelite
> and i.MX6DL sabrelite.
>
> Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>


Applied to target-arm.next, thanks. (I fixed a checkpatch nit
about missing spaces around a '/' operator.)

-- PMM
diff mbox

Patch

diff --git a/hw/arm/fsl-imx25.c b/hw/arm/fsl-imx25.c
index 1cd749a..c24656a 100644
--- a/hw/arm/fsl-imx25.c
+++ b/hw/arm/fsl-imx25.c
@@ -51,7 +51,7 @@  static void fsl_imx25_init(Object *obj)
     }
 
     for (i = 0; i < FSL_IMX25_NUM_GPTS; i++) {
-        object_initialize(&s->gpt[i], sizeof(s->gpt[i]), TYPE_IMX_GPT);
+        object_initialize(&s->gpt[i], sizeof(s->gpt[i]), TYPE_IMX25_GPT);
         qdev_set_parent_bus(DEVICE(&s->gpt[i]), sysbus_get_default());
     }
 
diff --git a/hw/arm/fsl-imx31.c b/hw/arm/fsl-imx31.c
index 31a3a87..3dc310c 100644
--- a/hw/arm/fsl-imx31.c
+++ b/hw/arm/fsl-imx31.c
@@ -47,7 +47,7 @@  static void fsl_imx31_init(Object *obj)
         qdev_set_parent_bus(DEVICE(&s->uart[i]), sysbus_get_default());
     }
 
-    object_initialize(&s->gpt, sizeof(s->gpt), TYPE_IMX_GPT);
+    object_initialize(&s->gpt, sizeof(s->gpt), TYPE_IMX31_GPT);
     qdev_set_parent_bus(DEVICE(&s->gpt), sysbus_get_default());
 
     for (i = 0; i < FSL_IMX31_NUM_EPITS; i++) {
diff --git a/hw/arm/fsl-imx6.c b/hw/arm/fsl-imx6.c
index 0c00e7a..bf7027c 100644
--- a/hw/arm/fsl-imx6.c
+++ b/hw/arm/fsl-imx6.c
@@ -67,7 +67,7 @@  static void fsl_imx6_init(Object *obj)
         object_property_add_child(obj, name, OBJECT(&s->uart[i]), NULL);
     }
 
-    object_initialize(&s->gpt, sizeof(s->gpt), TYPE_IMX_GPT);
+    object_initialize(&s->gpt, sizeof(s->gpt), TYPE_IMX6_GPT);
     qdev_set_parent_bus(DEVICE(&s->gpt), sysbus_get_default());
     object_property_add_child(obj, "gpt", OBJECT(&s->gpt), NULL);
 
diff --git a/hw/misc/imx6_ccm.c b/hw/misc/imx6_ccm.c
index ec58eef..5c6bf4d 100644
--- a/hw/misc/imx6_ccm.c
+++ b/hw/misc/imx6_ccm.c
@@ -371,6 +371,12 @@  static uint32_t imx6_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
     case CLK_32k:
         freq = CKIL_FREQ;
         break;
+    case CLK_HIGH:
+        freq = 24000000;
+        break;
+    case CLK_HIGH_DIV:
+        freq = 24000000/8;
+        break;
     default:
         qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: unsupported clock %d\n",
                       TYPE_IMX6_CCM, __func__, clock);
diff --git a/hw/timer/imx_gpt.c b/hw/timer/imx_gpt.c
index 3c2f01a..82bc73c 100644
--- a/hw/timer/imx_gpt.c
+++ b/hw/timer/imx_gpt.c
@@ -14,7 +14,6 @@ 
 
 #include "qemu/osdep.h"
 #include "hw/timer/imx_gpt.h"
-#include "hw/misc/imx_ccm.h"
 #include "qemu/main-loop.h"
 #include "qemu/log.h"
 
@@ -81,7 +80,18 @@  static const VMStateDescription vmstate_imx_timer_gpt = {
     }
 };
 
-static const IMXClk imx_gpt_clocks[] = {
+static const IMXClk imx25_gpt_clocks[] = {
+    CLK_NONE,      /* 000 No clock source */
+    CLK_IPG,       /* 001 ipg_clk, 532MHz*/
+    CLK_IPG_HIGH,  /* 010 ipg_clk_highfreq */
+    CLK_NONE,      /* 011 not defined */
+    CLK_32k,       /* 100 ipg_clk_32k */
+    CLK_32k,       /* 101 ipg_clk_32k */
+    CLK_32k,       /* 110 ipg_clk_32k */
+    CLK_32k,       /* 111 ipg_clk_32k */
+};
+
+static const IMXClk imx31_gpt_clocks[] = {
     CLK_NONE,      /* 000 No clock source */
     CLK_IPG,       /* 001 ipg_clk, 532MHz*/
     CLK_IPG_HIGH,  /* 010 ipg_clk_highfreq */
@@ -92,12 +102,23 @@  static const IMXClk imx_gpt_clocks[] = {
     CLK_NONE,      /* 111 not defined */
 };
 
+static const IMXClk imx6_gpt_clocks[] = {
+    CLK_NONE,      /* 000 No clock source */
+    CLK_IPG,       /* 001 ipg_clk, 532MHz*/
+    CLK_IPG_HIGH,  /* 010 ipg_clk_highfreq */
+    CLK_EXT,       /* 011 External clock */
+    CLK_32k,       /* 100 ipg_clk_32k */
+    CLK_HIGH_DIV,  /* 101 reference clock / 8 */
+    CLK_NONE,      /* 110 not defined */
+    CLK_HIGH,      /* 111 reference clock */
+};
+
 static void imx_gpt_set_freq(IMXGPTState *s)
 {
     uint32_t clksrc = extract32(s->cr, GPT_CR_CLKSRC_SHIFT, 3);
 
     s->freq = imx_ccm_get_clock_frequency(s->ccm,
-                                imx_gpt_clocks[clksrc]) / (1 + s->pr);
+                                          s->clocks[clksrc]) / (1 + s->pr);
 
     DPRINTF("Setting clksrc %d to frequency %d\n", clksrc, s->freq);
 
@@ -453,16 +474,52 @@  static void imx_gpt_class_init(ObjectClass *klass, void *data)
     dc->desc = "i.MX general timer";
 }
 
-static const TypeInfo imx_gpt_info = {
-    .name = TYPE_IMX_GPT,
+static void imx25_gpt_init(Object *obj)
+{
+    IMXGPTState *s = IMX_GPT(obj);
+
+    s->clocks = imx25_gpt_clocks;
+}
+
+static void imx31_gpt_init(Object *obj)
+{
+    IMXGPTState *s = IMX_GPT(obj);
+
+    s->clocks = imx31_gpt_clocks;
+}
+
+static void imx6_gpt_init(Object *obj)
+{
+    IMXGPTState *s = IMX_GPT(obj);
+
+    s->clocks = imx6_gpt_clocks;
+}
+
+static const TypeInfo imx25_gpt_info = {
+    .name = TYPE_IMX25_GPT,
     .parent = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(IMXGPTState),
+    .instance_init = imx25_gpt_init,
     .class_init = imx_gpt_class_init,
 };
 
+static const TypeInfo imx31_gpt_info = {
+    .name = TYPE_IMX31_GPT,
+    .parent = TYPE_IMX25_GPT,
+    .instance_init = imx31_gpt_init,
+};
+
+static const TypeInfo imx6_gpt_info = {
+    .name = TYPE_IMX6_GPT,
+    .parent = TYPE_IMX25_GPT,
+    .instance_init = imx6_gpt_init,
+};
+
 static void imx_gpt_register_types(void)
 {
-    type_register_static(&imx_gpt_info);
+    type_register_static(&imx25_gpt_info);
+    type_register_static(&imx31_gpt_info);
+    type_register_static(&imx6_gpt_info);
 }
 
 type_init(imx_gpt_register_types)
diff --git a/include/hw/misc/imx_ccm.h b/include/hw/misc/imx_ccm.h
index 48a7afa..33cbc09 100644
--- a/include/hw/misc/imx_ccm.h
+++ b/include/hw/misc/imx_ccm.h
@@ -46,7 +46,10 @@  typedef enum  {
     CLK_NONE,
     CLK_IPG,
     CLK_IPG_HIGH,
-    CLK_32k
+    CLK_32k,
+    CLK_EXT,
+    CLK_HIGH_DIV,
+    CLK_HIGH,
 } IMXClk;
 
 typedef struct IMXCCMClass {
diff --git a/include/hw/timer/imx_gpt.h b/include/hw/timer/imx_gpt.h
index 461adbe..eac59b2 100644
--- a/include/hw/timer/imx_gpt.h
+++ b/include/hw/timer/imx_gpt.h
@@ -74,7 +74,12 @@ 
 #define GPT_IR_OF3IE  (1 << 2)
 #define GPT_IR_ROVIE  (1 << 5)
 
-#define TYPE_IMX_GPT "imx.gpt"
+#define TYPE_IMX25_GPT "imx25.gpt"
+#define TYPE_IMX31_GPT "imx31.gpt"
+#define TYPE_IMX6_GPT "imx6.gpt"
+
+#define TYPE_IMX_GPT TYPE_IMX25_GPT
+
 #define IMX_GPT(obj) OBJECT_CHECK(IMXGPTState, (obj), TYPE_IMX_GPT)
 
 typedef struct IMXGPTState{
@@ -103,6 +108,8 @@  typedef struct IMXGPTState{
     uint32_t freq;
 
     qemu_irq irq;
+
+    const IMXClk *clocks;
 } IMXGPTState;
 
 #endif /* IMX_GPT_H */