Add SAMA5 clock logic. Cloned from SAM3U and not yet verified
This commit is contained in:
Gregory Nutt
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345e74c5bc
@ -50,10 +50,9 @@ GNU Toolchain Options
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The NuttX make system will support the several different toolchain options.
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All testing has been conducted using the AtmelStudio GCC toolchain. To use
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the CodeSourcery, devkitARM or other GNU toolchain, you simply need to add
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add one of the following configuration options to your .config (or defconfig)
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file:
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All testing has been conducted using the CodeSourcery GCC toolchain. To use
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a different toolchain, you simply need to add change to one of the following
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configuration options to your .config (or defconfig) file:
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CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery under Windows
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CONFIG_ARMV7A_TOOLCHAIN_CODESOURCERYL=y : CodeSourcery under Linux
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@ -63,8 +62,9 @@ GNU Toolchain Options
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CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIL=y : Generic GCC ARM EABI toolchain for Linux
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CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW=y : Generic GCC ARM EABI toolchain for Windows
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The AtmelStudio GCC toolchain is selected with CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW=y
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and setting the PATH variable appropriately.
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The CodeSourcery GCC toolchain is selected with
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CONFIG_ARMV7A_TOOLCHAIN_GNU_EABIW=y and setting the PATH variable
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appropriately.
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If you are not using AtmelStudio GCC toolchain, then you may also have to
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modify the PATH in the setenv.h file if your make cannot find the tools.
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@ -47,10 +47,90 @@
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************************************************************************************/
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/* Clocking *************************************************************************/
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/* After power-on reset, the sam3u device is running on a 4MHz internal RC. These
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* definitions will configure clocking
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*
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* MAINOSC: Frequency = 12MHz (crysta)
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* PLLA: PLL Divider = 1, Multiplier = 16 to generate PLLACK = 192MHz
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* Master Clock (MCK): Source = PLLACK, Prescalar = 1 to generate MCK = 96MHz
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* CPU clock: 96MHz
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*/
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/* Resulting clock frquencies *******************************************************/
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/* Main oscillator register settings.
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*
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* The start up time should be should be:
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* Start Up Time = 8 * MOSCXTST / SLCK = 56 Slow Clock Cycles.
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*/
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#define BOARD_MCK_FREQUENCY 0 /* FIXME */
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#define BOARD_CKGR_MOR_MOSCXTST (62 << PMC_CKGR_MOR_MOSCXTST_SHIFT) /* Start-up Time */
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/* PLLA configuration.
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*
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* Divider = 1
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* Multipler = 16
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*/
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#define BOARD_CKGR_PLLAR_MUL (15 << PMC_CKGR_PLLAR_MUL_SHIFT)
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#define BOARD_CKGR_PLLAR_STMODE PMC_CKGR_PLLAR_STMODE_FAST
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#define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
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#define BOARD_CKGR_PLLAR_DIV PMC_CKGR_PLLAR_DIV_BYPASS
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/* PMC master clock register settings.
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*
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* Source = PLLA
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* Divider = 2
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*/
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#define BOARD_PMC_MCKR_CSS PMC_MCKR_CSS_PLLA
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#define BOARD_PMC_MCKR_PRES PMC_MCKR_PRES_DIV2
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/* USB UTMI PLL start-up time */
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#define BOARD_CKGR_UCKR_UPLLCOUNT (3 << PMC_CKGR_UCKR_UPLLCOUNT_SHIFT)
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/* Resulting frequencies */
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#define BOARD_MAINOSC_FREQUENCY (12000000) /* MAINOSC: 12MHz crystal on-board */
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#define BOARD_PLLA_FREQUENCY (192000000) /* PLLACK: 16 * 12Mhz / 1 */
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#define BOARD_MCK_FREQUENCY (96000000) /* MCK: PLLACK / 2 */
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#define BOARD_CPU_FREQUENCY (96000000) /* CPU: MCK */
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/* HSMCI clocking
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*
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* Multimedia Card Interface clock (MCCK or MCI_CK) is Master Clock (MCK)
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* divided by (2*(CLKDIV+1)).
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*
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* MCI_SPEED = MCK / (2*(CLKDIV+1))
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* CLKDIV = MCI / MCI_SPEED / 2 - 1
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*
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* Where CLKDIV has a range of 0-255.
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*/
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/* MCK = 96MHz, CLKDIV = 119, MCI_SPEED = 96MHz / 2 * (119+1) = 400 KHz */
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#define HSMCI_INIT_CLKDIV (119 << HSMCI_MR_CLKDIV_SHIFT)
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/* MCK = 96MHz, CLKDIV = 3, MCI_SPEED = 96MHz / 2 * (3+1) = 12 MHz */
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#define HSMCI_MMCXFR_CLKDIV (3 << HSMCI_MR_CLKDIV_SHIFT)
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/* MCK = 96MHz, CLKDIV = 1, MCI_SPEED = 96MHz / 2 * (1+1) = 24 MHz */
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#define HSMCI_SDXFR_CLKDIV (1 << HSMCI_MR_CLKDIV_SHIFT)
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#define HSMCI_SDWIDEXFR_CLKDIV HSMCI_SDXFR_CLKDIV
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/* FLASH wait states
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*
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* FWS Max frequency
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* 1.62V 1.8V
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* --- ----- ------
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* 0 24MHz 27MHz
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* 1 40MHz 47MHz
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* 2 72MHz 84MHz
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* 3 84MHz 96MHz
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*/
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#define BOARD_FWS 3
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/* LED definitions ******************************************************************/
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@ -50,12 +50,13 @@ fi
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# This is the Cygwin path to the location where I installed the Atmel GCC
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# toolchain under Windows. You will also have to edit this if you install
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# this toolchain in any other location
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export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Atmel/Atmel Toolchain/ARM GCC/Native/4.7.3.99/arm-gnu-toolchain/bin"
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#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/Atmel/Atmel Toolchain/ARM GCC/Native/4.7.3.99/arm-gnu-toolchain/bin"
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# This is the Cygwin path to the location where I installed the CodeSourcery
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# toolchain under windows. You will also have to edit this if you install
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# the CodeSourcery toolchain in any other location
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#export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery G++ Lite/bin"
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export TOOLCHAIN_BIN="/cygdrive/c/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
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# These are the Cygwin paths to the locations where I installed the Atollic
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# toolchain under windows. You will also have to edit this if you install
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