i.MX: Remove CCM useless clock computation handling.

Most clocks supported by the CCM are useless to the qemu framework.

Only clocks related to timers (EPIT, GPT, PWM, WATCHDOG, ...) are usefull
to QEMU code.

Therefore this patch removes clock computation handling for all clocks but:
* CLK_NONE,
* CLK_IPG,
* CLK_32k

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Message-id: 9e7222efb349801032e60c0f6b0fbad0e5dcf648.1456868959.git.jcd@tribudubois.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/misc/imx25_ccm.c

@@ -120,20 +120,6 @@ static uint32_t imx25_ccm_get_mpll_clk(IMXCCMState *dev)
     return freq;
 }
 
-static uint32_t imx25_ccm_get_upll_clk(IMXCCMState *dev)
-{
-    uint32_t freq = 0;
-    IMX25CCMState *s = IMX25_CCM(dev);
-
-    if (!EXTRACT(s->reg[IMX25_CCM_CCTL_REG], UPLL_DIS)) {
-        freq = imx_ccm_calc_pll(s->reg[IMX25_CCM_UPCTL_REG], CKIH_FREQ);
-    }
-
-    DPRINTF("freq = %d\n", freq);
-
-    return freq;
-}
-
 static uint32_t imx25_ccm_get_mcu_clk(IMXCCMState *dev)
 {
     uint32_t freq;
@@ -184,18 +170,6 @@ static uint32_t imx25_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
     switch (clock) {
     case CLK_NONE:
         break;
-    case CLK_MPLL:
-        freq = imx25_ccm_get_mpll_clk(dev);
-        break;
-    case CLK_UPLL:
-        freq = imx25_ccm_get_upll_clk(dev);
-        break;
-    case CLK_MCU:
-        freq = imx25_ccm_get_mcu_clk(dev);
-        break;
-    case CLK_AHB:
-        freq = imx25_ccm_get_ahb_clk(dev);
-        break;
     case CLK_IPG:
         freq = imx25_ccm_get_ipg_clk(dev);
         break;

hw/misc/imx31_ccm.c

@@ -152,32 +152,6 @@ static uint32_t imx31_ccm_get_mcu_main_clk(IMXCCMState *dev)
     return freq;
 }
 
-static uint32_t imx31_ccm_get_mcu_clk(IMXCCMState *dev)
-{
-    uint32_t freq;
-    IMX31CCMState *s = IMX31_CCM(dev);
-
-    freq = imx31_ccm_get_mcu_main_clk(dev)
-           / (1 + EXTRACT(s->reg[IMX31_CCM_PDR0_REG], MCU));
-
-    DPRINTF("freq = %d\n", freq);
-
-    return freq;
-}
-
-static uint32_t imx31_ccm_get_hsp_clk(IMXCCMState *dev)
-{
-    uint32_t freq;
-    IMX31CCMState *s = IMX31_CCM(dev);
-
-    freq = imx31_ccm_get_mcu_main_clk(dev)
-           / (1 + EXTRACT(s->reg[IMX31_CCM_PDR0_REG], HSP));
-
-    DPRINTF("freq = %d\n", freq);
-
-    return freq;
-}
-
 static uint32_t imx31_ccm_get_hclk_clk(IMXCCMState *dev)
 {
     uint32_t freq;
@@ -211,12 +185,6 @@ static uint32_t imx31_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
     switch (clock) {
     case CLK_NONE:
         break;
-    case CLK_MCU:
-        freq = imx31_ccm_get_mcu_clk(dev);
-        break;
-    case CLK_HSP:
-        freq = imx31_ccm_get_hsp_clk(dev);
-        break;
     case CLK_IPG:
         freq = imx31_ccm_get_ipg_clk(dev);
         break;

include/hw/misc/imx_ccm.h

@@ -44,14 +44,7 @@ typedef struct IMXCCMState {
 
 typedef enum  {
     CLK_NONE,
-    CLK_MPLL,
-    CLK_UPLL,
-    CLK_MCU,
-    CLK_HSP,
-    CLK_MAX,
-    CLK_AHB,
     CLK_IPG,
-    CLK_PER,
     CLK_32k
 } IMXClk;