#include <netdev.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/at91_pio.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_common.h>
 #include <asm/io.h>
 
 
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/at91_pio.h>
 #include <status_led.h>
 
 
 void coloured_LED_init (void)
 {
-       at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
        at91_pio_t *pio = (at91_pio_t *)ATMEL_BASE_PIO;
 
-       /* Enable PIOB clock */
-       writel(1 << ATMEL_ID_PIOB, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
 
        /* Disable peripherals on LEDs */
        writel(GREEN_LED | YELLOW_LED | RED_LED, &pio->piob.per);
 
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 #include <atmel_mci.h>
 
 #ifdef CONFIG_MACB
 static void at91sam9260ek_macb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
 
-       /* Enable EMAC clock */
-       writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC0);
 
        /*
         * Disable pull-up on:
 
 int board_early_init_f(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clocks for all PIOs */
-       writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOC),
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        return 0;
 }
 
 #include <asm/arch/at91sam9261_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 {
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
        struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        unsigned long csa;
 
        /* Enable CS3 */
                       AT91_SMC_MODE_TDF_CYCLE(2),
                       &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        /* Configure RDY/BSY */
        at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
 
 static void at91sam9261ek_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        at91_set_A_periph(AT91_PIN_PB1, 0);     /* LCDHSYNC */
        at91_set_A_periph(AT91_PIN_PB2, 0);     /* LCDDOTCK */
        at91_set_A_periph(AT91_PIN_PB3, 0);     /* LCDDEN */
        at91_set_B_periph(AT91_PIN_PB27, 0);    /* LCDD22 */
        at91_set_B_periph(AT91_PIN_PB28, 0);    /* LCDD23 */
 
-       writel(AT91_PMC_HCK1, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_HCK1);
 
        /* For 9G10EK, let U-Boot allocate the framebuffer in SDRAM */
 #ifdef CONFIG_AT91SAM9261EK
 
 
 #include <common.h>
 #include <asm/arch/at91sam9261.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/at91_pio.h>
+#include <asm/arch/clk.h>
 #include <asm/io.h>
 
 void coloured_LED_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        /* Enable clock */
-       writel(ATMEL_ID_PIOA, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
 
        at91_set_gpio_output(CONFIG_RED_LED, 1);
        at91_set_gpio_output(CONFIG_GREEN_LED, 1);
 
 #include <asm/arch/at91sam9263.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_matrix.h>
 #include <asm/arch/at91_pio.h>
 #include <asm/arch/clk.h>
        unsigned long csa;
        at91_smc_t    *smc    = (at91_smc_t *) ATMEL_BASE_SMC0;
        at91_matrix_t *matrix = (at91_matrix_t *) ATMEL_BASE_MATRIX;
-       at91_pmc_t    *pmc    = (at91_pmc_t *) ATMEL_BASE_PMC;
 
        /* Enable CS3 */
        csa = readl(&matrix->csa[0]) | AT91_MATRIX_CSA_EBI_CS3A;
                       AT91_SMC_MODE_TDF_CYCLE(2),
                &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOA | 1 << ATMEL_ID_PIOCDE,
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOCDE);
 
        /* Configure RDY/BSY */
        at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
 #ifdef CONFIG_MACB
 static void at91sam9263ek_macb_hw_init(void)
 {
-       at91_pmc_t      *pmc    = (at91_pmc_t *) ATMEL_BASE_PMC;
        at91_pio_t      *pio    = (at91_pio_t *) ATMEL_BASE_PIO;
 
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
 
        /*
         * Disable pull-up on:
 
 static void at91sam9263ek_lcd_hw_init(void)
 {
-       at91_pmc_t      *pmc    = (at91_pmc_t *) ATMEL_BASE_PMC;
-
        at91_set_a_periph(AT91_PIO_PORTC, 1, 0);        /* LCDHSYNC */
        at91_set_a_periph(AT91_PIO_PORTC, 2, 0);        /* LCDDOTCK */
        at91_set_a_periph(AT91_PIO_PORTC, 3, 0);        /* LCDDEN */
        at91_set_a_periph(AT91_PIO_PORTC, 26, 0);       /* LCDD22 */
        at91_set_a_periph(AT91_PIO_PORTC, 27, 0);       /* LCDD23 */
 
-       writel(1 << ATMEL_ID_LCDC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_LCDC);
        gd->fb_base = ATMEL_BASE_SRAM0;
 }
 
 
 int board_early_init_f(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clocks for all PIOs */
-       writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOCDE),
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOCDE);
 
        at91_seriald_hw_init();
        return 0;
 
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/gpio.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91sam9263.h>
+#include <asm/arch/clk.h>
 
 void coloured_LED_init(void)
 {
-       /* Enable clock */
-       at91_pmc_t *pmc = (at91_pmc_t *) ATMEL_BASE_PMC;
-
-       writel(1 << ATMEL_ID_PIOB | 1 << ATMEL_ID_PIOCDE,
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
 
        at91_set_gpio_output(CONFIG_RED_LED, 1);
        at91_set_gpio_output(CONFIG_GREEN_LED, 1);
 
 #include <asm/arch/at91sam9g45_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
 #include <lcd.h>
 {
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
        struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        unsigned long csa;
 
        /* Enable CS3 */
               AT91_SMC_MODE_TDF_CYCLE(3),
               &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        /* Configure RDY/BSY */
        at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct atmel_mpddrc_config ddr2;
 
        ddr2_conf(&ddr2);
 
-       /* enable DDR2 clock */
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* DDRAM2 Controller initialize */
        ddr2_init(ATMEL_BASE_DDRSDRC0, ATMEL_BASE_CS6, &ddr2);
 #ifdef CONFIG_CMD_USB
 static void at91sam9m10g45ek_usb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIODE);
 
        at91_set_gpio_output(AT91_PIN_PD1, 0);
        at91_set_gpio_output(AT91_PIN_PD3, 0);
 #ifdef CONFIG_MACB
 static void at91sam9m10g45ek_macb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
 
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
 
        /*
         * Disable pull-up on:
 
 static void at91sam9m10g45ek_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        at91_set_A_periph(AT91_PIN_PE0, 0);     /* LCDDPWR */
        at91_set_A_periph(AT91_PIN_PE2, 0);     /* LCDCC */
        at91_set_A_periph(AT91_PIN_PE3, 0);     /* LCDVSYNC */
        at91_set_A_periph(AT91_PIN_PE29, 0);    /* LCDD22 */
        at91_set_A_periph(AT91_PIN_PE30, 0);    /* LCDD23 */
 
-       writel(1 << ATMEL_ID_LCDC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_LCDC);
 
        gd->fb_base = CONFIG_AT91SAM9G45_LCD_BASE;
 }
 
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/at91sam9g45.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 
 void coloured_LED_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clock */
-       writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIODE);
 
        at91_set_gpio_output(CONFIG_RED_LED, 1);
        at91_set_gpio_output(CONFIG_GREEN_LED, 1);
 
 #include <asm/arch/at91sam9x5_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/at91_pio.h>
 #include <asm/arch/clk.h>
 
 int board_early_init_f(void)
 {
-       /* Enable clocks for all PIOs */
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-       writel((1 << ATMEL_ID_PIOAB) | (1 << ATMEL_ID_PIOCD), &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOAB);
+       at91_periph_clk_enable(ATMEL_ID_PIOCD);
 
        at91_seriald_hw_init();
        return 0;
 
 #include <asm/arch/at91sam9rl_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 {
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
        struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        unsigned long csa;
 
        /* Enable CS3 */
                AT91_SMC_MODE_TDF_CYCLE(2),
                &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOD, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOD);
 
        /* Configure RDY/BSY */
        at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
 }
 static void at91sam9rlek_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        at91_set_B_periph(AT91_PIN_PC1, 0);     /* LCDPWR */
        at91_set_A_periph(AT91_PIN_PC5, 0);     /* LCDHSYNC */
        at91_set_A_periph(AT91_PIN_PC6, 0);     /* LCDDOTCK */
        at91_set_B_periph(AT91_PIN_PC24, 0);    /* LCDD22 */
        at91_set_B_periph(AT91_PIN_PC25, 0);    /* LCDD23 */
 
-       writel(1 << ATMEL_ID_LCDC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_LCDC);
 }
 
 #ifdef CONFIG_LCD_INFO
 
 int board_early_init_f(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clocks for all PIOs */
-       writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOC) | (1 << ATMEL_ID_PIOD),
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
+       at91_periph_clk_enable(ATMEL_ID_PIOD);
 
        return 0;
 }
 
 
 #include <common.h>
 #include <asm/arch/at91sam9rl.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 #include <asm/io.h>
 
 void coloured_LED_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clock */
-       writel(ATMEL_ID_PIOD, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOD);
 
        at91_set_gpio_output(CONFIG_RED_LED, 1);
        at91_set_gpio_output(CONFIG_GREEN_LED, 1);
 
 #include <asm/arch/at91sam9x5_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
-#include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
+#include <asm/arch/gpio.h>
 #include <lcd.h>
 #include <atmel_hlcdc.h>
 #include <atmel_mci.h>
 {
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
        struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        unsigned long csa;
 
        /* Enable CS3 */
                AT91_SMC_MODE_TDF_CYCLE(1),
                &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOCD, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOCD);
 
        /* Configure RDY/BSY */
        at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
 
 static void at91sam9x5ek_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        if (has_lcdc()) {
                at91_set_a_periph(AT91_PIO_PORTC, 26, 0);       /* LCDPWM */
                at91_set_a_periph(AT91_PIO_PORTC, 27, 0);       /* LCDVSYNC */
                at91_set_a_periph(AT91_PIO_PORTC, 22, 0);       /* LCDD22 */
                at91_set_a_periph(AT91_PIO_PORTC, 23, 0);       /* LCDD23 */
 
-               writel(1 << ATMEL_ID_LCDC, &pmc->pcer);
+               at91_periph_clk_enable(ATMEL_ID_LCDC);
        }
 }
 
 
 #include <version.h>
 #include <asm/io.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/atmel_pio4.h>
 #include <asm/arch/atmel_mpddrc.h>
 #include <asm/arch/atmel_usba_udc.h>
 
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct atmel_mpddrc_config ddr2;
 
        ddr2_conf(&ddr2);
 
-       /* enable MPDDR clock */
+       /* Enable MPDDR clock */
        at91_periph_clk_enable(ATMEL_ID_MPDDRC);
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* DDRAM2 Controller initialize */
        ddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddr2);
 
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct atmel_mpddrc_config ddr2;
 
        ddr2_conf(&ddr2);
 
-       /* enable MPDDR clock */
+       /* Enable MPDDR clock */
        at91_periph_clk_enable(ATMEL_ID_MPDDRC);
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* DDRAM2 Controller initialize */
        ddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddr2);
 
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct atmel_mpddrc_config ddr2;
 
        ddr2_conf(&ddr2);
 
-       /* enable MPDDR clock */
+       /* Enable MPDDR clock */
        at91_periph_clk_enable(ATMEL_ID_MPDDRC);
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* DDRAM2 Controller initialize */
        ddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddr2);
 
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct atmel_mpddrc_config ddr2;
 
        ddr2_conf(&ddr2);
 
-       /* enable MPDDR clock */
+       /* Enable MPDDR clock */
        at91_periph_clk_enable(ATMEL_ID_MPDDRC);
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* DDRAM2 Controller initialize */
        ddr2_init(ATMEL_BASE_MPDDRC, ATMEL_BASE_DDRCS, &ddr2);
 
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/atmel_serial.h>
 #include <net.h>
 
 static void macb_hw_init(void)
 {
-       struct at91_pmc *pmc   = (struct at91_pmc  *)ATMEL_BASE_PMC;
        struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
 
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC0);
 
        /* Disable pull-ups to prevent PHY going into test mode */
        writel(pin_to_mask(AT91_PIN_PA14) |
 
 int board_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable PIO clocks */
-       writel((1 << ATMEL_ID_PIOA) |
-              (1 << ATMEL_ID_PIOB) |
-              (1 << ATMEL_ID_PIOC), &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        /* The mach-type is the same for both Snapper 9260 and 9G20 */
        gd->bd->bi_arch_number = MACH_TYPE_SNAPPER_9260;
 
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
 #include <asm/arch/at91_matrix.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 #include <asm-generic/gpio.h>
 #include <asm/io.h>
        unsigned long csa;
        at91_smc_t *smc = (at91_smc_t *)ATMEL_BASE_SMC0;
        at91_matrix_t *matrix = (at91_matrix_t *)ATMEL_BASE_MATRIX;
-       at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
 
        /* Enable CS3 */
        csa = readl(&matrix->csa[0]) | AT91_MATRIX_CSA_EBI_CS3A;
               AT91_SMC_MODE_DBW_8 |
               AT91_SMC_MODE_TDF_CYCLE(2), &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOA | 1 << ATMEL_ID_PIOCDE, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOCDE);
 
        /* Configure RDY/BSY */
        gpio_request(CONFIG_SYS_NAND_READY_PIN, "NAND ready/busy");
 #ifdef CONFIG_MACB
 static void usb_a9263_macb_hw_init(void)
 {
-       at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
-
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
 
        /*
         * Disable pull-up on:
 
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_spi.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
  */
 int board_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
-       /* Enable clocks for all PIOs */
-       writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOC),
-               &pmc->pcer);
        /* Set adress of boot parameters. */
        gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
        /* Initialize UARTs and power management. */
 {
        const char *devname;
        unsigned short mode;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 
-       /* Enable on-chip EMAC clock. */
-       writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC0);
+
        /* Need to reset PHY via power management. */
        ethernut5_phy_reset();
        /* Set peripheral pins. */
 #ifdef CONFIG_GENERIC_ATMEL_MCI
 int board_mmc_init(bd_t *bd)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+       at91_periph_clk_enable(ATMEL_ID_MCI);
 
-       /* Enable MCI clock. */
-       writel(1 << ATMEL_ID_MCI, &pmc->pcer);
        /* Initialize MCI hardware. */
        at91_mci_hw_init();
        /* Register the device. */
 
 #ifdef CONFIG_ATMEL_SPI
 /*
+
  * Note, that u-boot uses different code for SPI bus access. While
  * memory routines use automatic chip select control, the serial
  * flash support requires 'manual' GPIO control. Thus, we switch
 
 #ifdef CONFIG_MACB
 static void meesc_macb_hw_init(void)
 {
-       at91_pmc_t      *pmc    = (at91_pmc_t *) ATMEL_BASE_PMC;
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
+
        at91_macb_hw_init();
 }
 #endif
 
 int board_early_init_f(void)
 {
-       at91_pmc_t      *pmc    = (at91_pmc_t *) ATMEL_BASE_PMC;
-
-       /* enable all clocks */
-       writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOCDE) | (1 << ATMEL_ID_UHP),
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOCDE);
+       at91_periph_clk_enable(ATMEL_ID_UHP);
 
        at91_seriald_hw_init();
 
 
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/at91sam9g45.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 
 void coloured_LED_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clock */
-       writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIODE);
 
        at91_set_gpio_output(CONFIG_GREEN_LED, 1);
 
 
 #include <asm/arch/at91sam9g45_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
 #include <lcd.h>
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX;
        struct atmel_mpddrc_config ddr2;
        unsigned long csa;
 
        ddr2_conf(&ddr2);
 
-       /* enable DDR2 clock */
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* Chip select 1 is for DDR2/SDRAM */
        csa = readl(&mat->ebicsa);
 #ifdef CONFIG_CMD_USB
 static void picosam9g45_usb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIODE);
 
        at91_set_gpio_output(AT91_PIN_PD1, 0);
        at91_set_gpio_output(AT91_PIN_PD3, 0);
 #ifdef CONFIG_MACB
 static void picosam9g45_macb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct at91_port *pioa = (struct at91_port *)ATMEL_BASE_PIOA;
 
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
 
        /*
         * Disable pull-up on:
 
 static void picosam9g45_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        at91_set_A_periph(AT91_PIN_PE0, 0);     /* LCDDPWR */
        at91_set_A_periph(AT91_PIN_PE2, 0);     /* LCDCC */
        at91_set_A_periph(AT91_PIN_PE3, 0);     /* LCDVSYNC */
        at91_set_A_periph(AT91_PIN_PE29, 0);    /* LCDD22 */
        at91_set_A_periph(AT91_PIN_PE30, 0);    /* LCDD23 */
 
-       writel(1 << ATMEL_ID_LCDC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_LCDC);
 
        gd->fb_base = CONFIG_AT91SAM9G45_LCD_BASE;
 }
 
 
 #include <common.h>
 #include <asm/gpio.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 
 void coloured_LED_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clock */
-       writel(1 << ATMEL_ID_PIOC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        gpio_direction_output(CONFIG_RED_LED, 1);
        gpio_direction_output(CONFIG_GREEN_LED, 1);
 
 #include <asm/gpio.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/at91_matrix.h>
 #include <asm/arch/clk.h>
        unsigned long csa;
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
        struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 
        /* Enable CS3 */
        csa = readl(&matrix->csa) | AT91_MATRIX_CSA_EBI_CS3A;
                AT91_SMC_MODE_TDF_CYCLE(2),
                &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOA |
-               1 << ATMEL_ID_PIOC,
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        /* Configure RDY/BSY */
        gpio_direction_input(CONFIG_SYS_NAND_READY_PIN);
 static void pm9261_dm9000_hw_init(void)
 {
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 
        /* Configure SMC CS2 for DM9000 */
        writel(AT91_SMC_SETUP_NWE(2) | AT91_SMC_SETUP_NCS_WR(0) |
                &smc->cs[2].mode);
 
        /* Configure Interrupt pin as input, no pull-up */
-       writel(1 << ATMEL_ID_PIOA, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
        at91_set_pio_input(AT91_PIO_PORTA, 24, 0);
 }
 #endif
 
 static void pm9261_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        at91_set_a_periph(AT91_PIO_PORTB, 1, 0);        /* LCDHSYNC */
        at91_set_a_periph(AT91_PIO_PORTB, 2, 0);        /* LCDDOTCK */
        at91_set_a_periph(AT91_PIO_PORTB, 3, 0);        /* LCDDEN */
        at91_set_b_periph(AT91_PIO_PORTB, 27, 0);       /* LCDD22 */
        at91_set_b_periph(AT91_PIO_PORTB, 28, 0);       /* LCDD23 */
 
-       writel(1 << 17, &pmc->scer); /* LCD controller Clock, AT91SAM9261 only */
+       at91_system_clk_enable(AT91_PMC_HCK1);
 
        gd->fb_base = ATMEL_BASE_SRAM;
 }
 
 int board_early_init_f(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clocks for some PIOs */
-       writel(1 << ATMEL_ID_PIOA |
-               1 << ATMEL_ID_PIOC,
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
        at91_seriald_hw_init();
 
 
 
 #include <common.h>
 #include <asm/gpio.h>
-#include <asm/arch/at91_pmc.h>
+#include <asm/arch/clk.h>
 #include <asm/arch/gpio.h>
 
 void coloured_LED_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clock */
-       writel(1 << ATMEL_ID_PIOB, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
 
        gpio_direction_output(CONFIG_RED_LED, 1);
        gpio_direction_output(CONFIG_GREEN_LED, 1);
 
 #include <asm/gpio.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/at91_matrix.h>
 #include <asm/arch/clk.h>
 #ifdef CONFIG_MACB
 static void pm9263_macb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        /*
         * PB27 enables the 50MHz oscillator for Ethernet PHY
         * 1 - enable
        at91_set_pio_output(AT91_PIO_PORTB, 27, 1);
        at91_set_pio_value(AT91_PIO_PORTB, 27, 1); /* 1- enable, 0 - disable */
 
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
 
        /*
         * Disable pull-up on:
 
 static void pm9263_lcd_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        at91_set_a_periph(AT91_PIO_PORTC, 0, 0);        /* LCDVSYNC */
        at91_set_a_periph(AT91_PIO_PORTC, 1, 0);        /* LCDHSYNC */
        at91_set_a_periph(AT91_PIO_PORTC, 2, 0);        /* LCDDOTCK */
        at91_set_a_periph(AT91_PIO_PORTC, 26, 0);       /* LCDD22 */
        at91_set_a_periph(AT91_PIO_PORTC, 27, 0);       /* LCDD23 */
 
-       writel(1 << ATMEL_ID_LCDC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_LCDC);
 
        /* Power Control */
        at91_set_pio_output(AT91_PIO_PORTA, 22, 1);
 
 int board_early_init_f(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clocks for all PIOs */
-       writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOCDE),
-               &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOCDE);
 
        at91_seriald_hw_init();
 
 
 #include <asm/gpio.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/at91_matrix.h>
 #include <asm/arch/gpio.h>
        unsigned long csa;
        struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
        struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
 
        /* Enable CS3 */
        csa = readl(&matrix->ccr[6]) | AT91_MATRIX_CSA_EBI_CS3A;
                AT91_SMC_MODE_TDF_CYCLE(3),
                &smc->cs[3].mode);
 
-       writel(1 << ATMEL_ID_PIOC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
 
 #ifdef CONFIG_SYS_NAND_READY_PIN
        /* Configure RDY/BSY */
 #ifdef CONFIG_MACB
 static void pm9g45_macb_hw_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
        /*
         * PD2 enables the 50MHz oscillator for Ethernet PHY
         * 1 - enable
        at91_set_pio_output(AT91_PIO_PORTD, 2, 1);
        at91_set_pio_value(AT91_PIO_PORTD, 2, 1); /* 1- enable, 0 - disable */
 
-       /* Enable clock */
-       writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_EMAC);
 
        /*
         * Disable pull-up on:
 
 int board_early_init_f(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
-       /* Enable clocks for all PIOs */
-       writel((1 << ATMEL_ID_PIOA) |
-               (1 << ATMEL_ID_PIOB) |
-               (1 << ATMEL_ID_PIOC) |
-               (1 << ATMEL_ID_PIODE), &pmc->pcer);
+       at91_periph_clk_enable(ATMEL_ID_PIOA);
+       at91_periph_clk_enable(ATMEL_ID_PIOB);
+       at91_periph_clk_enable(ATMEL_ID_PIOC);
+       at91_periph_clk_enable(ATMEL_ID_PIODE);
 
        at91_seriald_hw_init();
 
 
 #include <asm/arch/at91sam9g45_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/clk.h>
 
 void mem_init(void)
 {
-       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
        struct atmel_mpddrc_config ddr2;
 
        ddr2_conf(&ddr2);
 
-       /* enable DDR2 clock */
-       writel(AT91_PMC_DDR, &pmc->scer);
+       at91_system_clk_enable(AT91_PMC_DDR);
 
        /* DDRAM2 Controller initialize */
        ddr2_init(ATMEL_BASE_DDRSDRC0, ATMEL_BASE_CS6, &ddr2);
 
        /* Enable UPLL clock */
        writel(AT91_PMC_UPLLEN | AT91_PMC_BIASEN, &pmc->uckr);
+
        /* Enable UDPHS clock */
        at91_periph_clk_enable(ATMEL_ID_UDPHS);
 }
 
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_spi.h>
 #include <spi.h>
 #include <asm/arch/clk.h>
        /* Enable UDPCK clock, MCK is enabled in at91_clock_init() */
        at91_periph_clk_enable(ATMEL_ID_UDP);
 
-       writel(AT91SAM926x_PMC_UDP, &pmc->scer);
+       at91_system_clk_enable(AT91SAM926x_PMC_UDP);
 }
 
 struct at91_udc_data board_udc_data  = {
 
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
 #include <asm/arch/at91_common.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/at91sam9_sdramc.h>
        /* Enable UDPCK clock, MCK is enabled in at91_clock_init() */
        at91_periph_clk_enable(ATMEL_ID_UDP);
 
-       writel(AT91SAM926x_PMC_UDP, &pmc->scer);
+       at91_system_clk_enable(AT91SAM926x_PMC_UDP);
 }
 
 struct at91_udc_data board_udc_data  = {