platform: kendryte/k210: Simplify sysctl code

Simplify sysctl.c code to only the used CPU freqency function.
This reduces the size of the final firmware by 4KB.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>

platform/kendryte/k210/sysctl.h

@@ -782,164 +782,9 @@ typedef struct _sysctl_general_pll {
 } __attribute__((packed, aligned(4))) sysctl_general_pll_t;
 
 /**
- * System controller object instanse
+ * Get frequency of CPU
+ * @return      The frequency of the CPU
  */
-extern volatile sysctl_t *const sysctl;
-
-/**
- * Enable clock for peripheral
- * @param[in]   clock       The clock to be enable
- * @return      result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_clock_enable(sysctl_clock_t clock);
-
-/**
- * Enable clock for peripheral
- * @param[in]   clock       The clock to be disable
- * @return      result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_clock_disable(sysctl_clock_t clock);
-
-/**
- * Sysctl clock set threshold
- * @param[in]   which           Which threshold to set
- * @param[in]   threshold       The threshold value
- * @return      result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_clock_set_threshold(sysctl_threshold_t which, int threshold);
-
-/**
- * Sysctl clock get threshold
- * @param[in]   which       Which threshold to get
- * @return      The threshold value
- *     - Other  Value of threshold
- *     - -1     Fail
- */
-int sysctl_clock_get_threshold(sysctl_threshold_t which);
-
-/**
- * Sysctl clock set clock select
- * @param[in]   which       Which clock select to set
- * @param[in]   select      The clock select value
- * @return      result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_clock_set_clock_select(sysctl_clock_select_t which, int select);
-
-/**
- * Sysctl clock get clock select
- * @param[in]   which  Which clock select to get
- * @return      The clock select value
- *     - Other  Value of clock select
- *     - -1     Fail
- */
-int sysctl_clock_get_clock_select(sysctl_clock_select_t which);
-
-/**
- * Get PLL frequency
- * @param[in]   pll     The PLL id
- * @return      The frequency of PLL
- */
-u32 sysctl_pll_get_freq(sysctl_pll_t pll);
-
-/**
- * Get base clock frequency by clock id
- * @param[in]   clock       The clock id
- * @return      The clock frequency
- */
-u32 sysctl_clock_get_freq(sysctl_clock_t clock);
-
-/**
- * Reset device by reset controller
- * @param[in]   reset       The reset signal
- */
-void sysctl_reset(sysctl_reset_t reset);
-
-/**
- * Enable the PLL and power on with reset
- * @param[in]   pll     The pll id
- * @return      Result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_pll_enable(sysctl_pll_t pll);
-
-/**
- * Disable the PLL and power off
- * @param[in]   pll     The pll id
- * @return      Result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_pll_disable(sysctl_pll_t pll);
-
-/**
- * Select DMA channel handshake peripheral signal
- * @param[in]   channel     The DMA channel
- * @param[in]   select      The peripheral select
- * @return      Result
- *     - 0      Success
- *     - Other  Fail
- */
-int sysctl_dma_select(sysctl_dma_channel_t channel, sysctl_dma_select_t select);
-
-/**
- * Set SPI0_D0-D7 DVP_D0-D7 as spi and dvp data pin
- * @param[in]   en     Enable or not
- * @return      Result
- *     - 0      Success
- *     - Other  Fail
- */
-u32 sysctl_set_spi0_dvp_data(u8 en);
-
-/**
- * Set io power mode
- * @param[in]   power_bank          IO power bank
- * @param[in]   io_power_mode       Set power mode 3.3v or 1.8
- * @return      Result
- *     - 0      Success
- *     - Other  Fail
- */
-void sysctl_set_power_mode(sysctl_power_bank_t power_bank, sysctl_io_power_mode_t io_power_mode);
-
-/**
- * Set frequency of CPU
- * @param[in]   freq       The desired frequency in Hz
- * @return      The actual frequency of CPU after set
- */
-u32 sysctl_cpu_set_freq(u32 freq);
-
-/**
- * Init PLL freqency
- * @param[in]   pll            The PLL id
- * @param[in]   pll_freq       The desired frequency in Hz
-
- */
-u32 sysctl_pll_set_freq(sysctl_pll_t pll, u32 pll_freq);
-
-/**
- * Enable interrupt
- */
-void sysctl_enable_irq(void);
-
-/**
- * Disable interrupt
- */
-void sysctl_disable_irq(void);
-
-/**
- * Get the time start up to now
- * @return      The time of microsecond
- */
-u64 sysctl_get_time_us(void);
-
-void sysctl_usleep(u64 usec);
+u32 sysctl_get_cpu_freq(void);
 
 #endif /* _K210_SYSCTL_H_ */

platform/kendryte/k210/uarths.c

@@ -21,7 +21,7 @@ static volatile struct uarths *const uarths =
 
 void uarths_init(u32 baud_rate, enum uarths_stopbit stopbit)
 {
-	u32 freq = sysctl_clock_get_freq(SYSCTL_CLOCK_CPU);
+	u32 freq = sysctl_get_cpu_freq();
 	u16 div = freq / baud_rate - 1;
 
 	/* Set UART registers */