output 50 MHz for RMII
in hardware revision 2 the Ethernet PHY RMII_CLOCK input clock is connected to the MCU pin PA10. GCLK4 of the MCU now outputs the required 50 MHz clock on this pin. the same clock is re-used for UART debug to generate the 921600 bps baud rate. Change-Id: Id3a3dee15c3986536b0623d0f39ca62e94acd1fd
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0c3533fc09
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@ -702,7 +702,7 @@ drivers:
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gclk_arch_gen_3_runstdby: false
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gclk_arch_gen_4_enable: true
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gclk_arch_gen_4_idc: false
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gclk_arch_gen_4_oe: false
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gclk_arch_gen_4_oe: true
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gclk_arch_gen_4_oov: false
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gclk_arch_gen_4_runstdby: false
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gclk_arch_gen_5_enable: true
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@ -748,7 +748,7 @@ drivers:
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gclk_gen_3_div: 1
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gclk_gen_3_div_sel: false
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gclk_gen_3_oscillator: 32kHz External Crystal Oscillator (XOSC32K)
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gclk_gen_4_div: 1
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gclk_gen_4_div: 2
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gclk_gen_4_div_sel: false
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gclk_gen_4_oscillator: Digital Phase Locked Loop (DPLL1)
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gclk_gen_5_div: 5
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@ -1462,6 +1462,16 @@ pads:
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mode: Peripheral IO
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user_label: SIM2_IO
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configuration: null
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RMII_CLOCK:
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name: PA10
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definition: Atmel:SAME54_Drivers:0.0.1::SAME54N19A-AF::pad::PA10
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mode: Advanced
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user_label: RMII_CLOCK
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configuration:
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pad_direction: Out
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pad_function: M
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pad_initial_level: Low
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pad_pull_config: 'Off'
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SIMCLK_20MHZ:
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name: PA11
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definition: Atmel:SAME54_Drivers:0.0.1::SAME54N19A-AF::pad::PA11
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@ -31,6 +31,7 @@
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#define SIM5_INT GPIO(GPIO_PORTA, 3)
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#define SIM0_IO GPIO(GPIO_PORTA, 4)
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#define SIM2_IO GPIO(GPIO_PORTA, 9)
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#define RMII_CLOCK GPIO(GPIO_PORTA, 10)
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#define SIMCLK_20MHZ GPIO(GPIO_PORTA, 11)
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#define SIM1_IO GPIO(GPIO_PORTA, 16)
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#define VB0 GPIO(GPIO_PORTA, 20)
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@ -349,7 +349,7 @@
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// <i> Indicates whether Output Enable is enabled or not
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// <id> gclk_arch_gen_4_oe
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#ifndef CONF_GCLK_GEN_4_OE
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#define CONF_GCLK_GEN_4_OE 0
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#define CONF_GCLK_GEN_4_OE 1
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#endif
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// <q> Output Off Value
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@ -378,7 +378,7 @@
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//<o> Generic clock generator 4 division <0x0000-0xFFFF>
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// <id> gclk_gen_4_div
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#ifndef CONF_GCLK_GEN_4_DIV
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#define CONF_GCLK_GEN_4_DIV 1
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#define CONF_GCLK_GEN_4_DIV 2
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#endif
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// </h>
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// </e>
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@ -641,7 +641,7 @@
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* \brief SERCOM7's Core Clock frequency
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*/
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#ifndef CONF_GCLK_SERCOM7_CORE_FREQUENCY
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#define CONF_GCLK_SERCOM7_CORE_FREQUENCY 100000000
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#define CONF_GCLK_SERCOM7_CORE_FREQUENCY 50000000
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#endif
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/**
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@ -503,6 +503,53 @@ void system_init(void)
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gpio_set_pin_function(SIM5_INT, GPIO_PIN_FUNCTION_OFF);
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// GPIO on PA10
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gpio_set_pin_direction(RMII_CLOCK,
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// <y> Pin direction
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// <id> pad_direction
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// <GPIO_DIRECTION_OFF"> Off
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// <GPIO_DIRECTION_IN"> In
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// <GPIO_DIRECTION_OUT"> Out
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GPIO_DIRECTION_OUT);
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gpio_set_pin_level(RMII_CLOCK,
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// <y> Initial level
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// <id> pad_initial_level
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// <false"> Low
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// <true"> High
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false);
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gpio_set_pin_pull_mode(RMII_CLOCK,
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// <y> Pull configuration
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// <id> pad_pull_config
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// <GPIO_PULL_OFF"> Off
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// <GPIO_PULL_UP"> Pull-up
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// <GPIO_PULL_DOWN"> Pull-down
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GPIO_PULL_OFF);
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gpio_set_pin_function(RMII_CLOCK,
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// <y> Pin function
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// <id> pad_function
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// <i> Auto : use driver pinmux if signal is imported by driver, else turn off function
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// <GPIO_PIN_FUNCTION_OFF"> Auto
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// <GPIO_PIN_FUNCTION_OFF"> Off
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// <GPIO_PIN_FUNCTION_A"> A
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// <GPIO_PIN_FUNCTION_B"> B
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// <GPIO_PIN_FUNCTION_C"> C
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// <GPIO_PIN_FUNCTION_D"> D
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// <GPIO_PIN_FUNCTION_E"> E
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// <GPIO_PIN_FUNCTION_F"> F
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// <GPIO_PIN_FUNCTION_G"> G
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// <GPIO_PIN_FUNCTION_H"> H
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// <GPIO_PIN_FUNCTION_I"> I
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// <GPIO_PIN_FUNCTION_J"> J
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// <GPIO_PIN_FUNCTION_K"> K
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// <GPIO_PIN_FUNCTION_L"> L
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// <GPIO_PIN_FUNCTION_M"> M
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// <GPIO_PIN_FUNCTION_N"> N
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GPIO_PIN_FUNCTION_M);
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// GPIO on PA11
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gpio_set_pin_direction(SIMCLK_20MHZ,
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