@@ -297,6 +297,7 @@ struct sunxi_ccm_reg {
/* Module gate/reset shift*/
#define RESET_SHIFT (16)
+#define GATE_SHIFT (0)
/* DRAM clock bit field */
#define DRAM_MOD_RESET BIT(30)
@@ -728,7 +728,7 @@ config I2C3_ENABLE
See I2C0_ENABLE help text.
endif
-if SUNXI_GEN_SUN6I
+if SUNXI_GEN_SUN6I || SUN50I_GEN_H6
config R_I2C_ENABLE
bool "Enable the PRCM I2C/TWI controller"
# This is used for the pmic on H3
@@ -2,6 +2,7 @@
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/clock.h>
+#include <asm/arch/prcm.h>
#ifdef CONFIG_SPL_BUILD
void clock_init_safe(void)
@@ -92,3 +93,31 @@ unsigned int clock_get_pll6(void)
/* The register defines PLL6-4X, not plain PLL6 */
return 24000000 / 4 * n / div1 / div2;
}
+
+int clock_twi_onoff(int port, int state)
+{
+ struct sunxi_ccm_reg *const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ struct sunxi_prcm_reg *const prcm =
+ (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
+ u32 value, *ptr;
+ int shift;
+
+ value = BIT(GATE_SHIFT) | BIT (RESET_SHIFT);
+
+ if (port == 5) {
+ shift = 0;
+ ptr = &prcm->twi_gate_reset;
+ } else {
+ shift = port;
+ ptr = &ccm->twi_gate_reset;
+ }
+
+ /* set the apb clock gate and reset for twi */
+ if (state)
+ setbits_le32(ptr, value << shift);
+ else
+ clrbits_le32(ptr, value << shift);
+
+ return 0;
+}
I2C support, especially R_I2C port, will be needed in future. Upcoming support for H616 will need R_I2C to adjust DRAM voltage. Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net> --- .../include/asm/arch-sunxi/clock_sun50i_h6.h | 1 + arch/arm/mach-sunxi/Kconfig | 2 +- arch/arm/mach-sunxi/clock_sun50i_h6.c | 29 +++++++++++++++++++ 3 files changed, 31 insertions(+), 1 deletion(-)