按照手册ML5238的spi访问片选加一小延时

Signed-off-by: huhui <huhui@sharkgulf.com>

Application/bsp/ml5238.c

@@ -351,15 +351,21 @@ static void ml5238_clear_bits(uint8_t regaddr, uint8_t bit) {
 int ml5238_write(uint8_t regaddr, uint8_t data){
 	uint16_t send_data=(((uint16_t)regaddr)<<(0x09))|((uint16_t)data);
 	ml5238_cs(0);
+	task_udelay(1); //min 100ns
 	int ret = spi0_send_uint16(send_data, NULL);
+	task_udelay(1);
 	ml5238_cs(1);
+	task_udelay(1);
 	return ret;
 }
 
 static int ml5238_read(uint8_t regaddr, uint8_t *data){
 	uint16_t send_data=((((uint16_t)regaddr)<<(0x09))|0x0100u)|((uint16_t)0x00u);
 	ml5238_cs(0);
+	task_udelay(1);
 	int ret = spi0_send_uint16(send_data, data);
+	task_udelay(1);
 	ml5238_cs(1);
+	task_udelay(1);
 	return ret;
 }