static int rsb_init(void)
{
int ret;
ret = rsb_init_controller();
if (ret)
return ret;
/* Start with 400 KHz to issue the I2C->RSB switch command. */
ret = rsb_set_bus_speed(SUNXI_OSC24M_CLK_IN_HZ, 400000);
if (ret)
return ret;
/*
* Initiate an I2C transaction to write 0x7c into register 0x3e,
* switching the PMIC to RSB mode.
*/
ret = rsb_set_device_mode(0x7c3e00);
if (ret)
return ret;
/* Now in RSB mode, switch to the recommended 3 MHz. */
ret = rsb_set_bus_speed(SUNXI_OSC24M_CLK_IN_HZ, 3000000);
if (ret)
return ret;
/* Associate the 8-bit runtime address with the 12-bit bus address. */
return rsb_assign_runtime_address(AXP803_HW_ADDR,
AXP803_RT_ADDR);
}
int rsb_init(void)
{
struct sunxi_rsb_reg * const rsb =
(struct sunxi_rsb_reg *)SUNXI_RSB_BASE;
rsb_cfg_io();
/* Enable RSB and PIO clk, and de-assert their resets */
prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_RSB);
writel(RSB_CTRL_SOFT_RST, &rsb->ctrl);
rsb_set_clk();
return rsb_set_device_mode();
}
/*
* The axp221 uses the p2wi bus, the axp223 is identical (for all registers
* used sofar) but uses the rsb bus. These functions abstract this.
*/
static int pmic_bus_init(void)
{
#ifdef CONFIG_MACH_SUN6I
p2wi_init();
return p2wi_change_to_p2wi_mode(AXP221_CHIP_ADDR, AXP221_CTRL_ADDR,
AXP221_INIT_DATA);
#else
int ret;
rsb_init();
ret = rsb_set_device_mode(AXP223_DEVICE_MODE_DATA);
if (ret)
return ret;
return rsb_set_device_address(AXP223_DEVICE_ADDR, AXP223_RUNTIME_ADDR);
#endif
}
