mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 08:59:33 +00:00
ccd2f8db81
After enabling a module, SW has to wait on IDLEST bit until it is Fully functional. This wait is missing for UART module and there is a immediate access of UART registers after this. So there is a chance of hang on this module( This can happen when we are running from MPU SRAM). So waiting for IDLEST bit. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
|
|
* clock_am43xx.c
|
|
*
|
|
* clocks for AM43XX based boards
|
|
* Derived from AM33XX based boards
|
|
*
|
|
* Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/cpu.h>
|
|
#include <asm/arch/clock.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
#include <asm/io.h>
|
|
|
|
struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
|
|
struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;
|
|
struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
|
|
|
|
const struct dpll_regs dpll_mpu_regs = {
|
|
.cm_clkmode_dpll = CM_WKUP + 0x560,
|
|
.cm_idlest_dpll = CM_WKUP + 0x564,
|
|
.cm_clksel_dpll = CM_WKUP + 0x56c,
|
|
.cm_div_m2_dpll = CM_WKUP + 0x570,
|
|
};
|
|
|
|
const struct dpll_regs dpll_core_regs = {
|
|
.cm_clkmode_dpll = CM_WKUP + 0x520,
|
|
.cm_idlest_dpll = CM_WKUP + 0x524,
|
|
.cm_clksel_dpll = CM_WKUP + 0x52C,
|
|
.cm_div_m4_dpll = CM_WKUP + 0x538,
|
|
.cm_div_m5_dpll = CM_WKUP + 0x53C,
|
|
.cm_div_m6_dpll = CM_WKUP + 0x540,
|
|
};
|
|
|
|
const struct dpll_regs dpll_per_regs = {
|
|
.cm_clkmode_dpll = CM_WKUP + 0x5E0,
|
|
.cm_idlest_dpll = CM_WKUP + 0x5E4,
|
|
.cm_clksel_dpll = CM_WKUP + 0x5EC,
|
|
.cm_div_m2_dpll = CM_WKUP + 0x5F0,
|
|
};
|
|
|
|
const struct dpll_regs dpll_ddr_regs = {
|
|
.cm_clkmode_dpll = CM_WKUP + 0x5A0,
|
|
.cm_idlest_dpll = CM_WKUP + 0x5A4,
|
|
.cm_clksel_dpll = CM_WKUP + 0x5AC,
|
|
.cm_div_m2_dpll = CM_WKUP + 0x5B0,
|
|
.cm_div_m4_dpll = CM_WKUP + 0x5B8,
|
|
};
|
|
|
|
void setup_clocks_for_console(void)
|
|
{
|
|
u32 clkctrl, idlest = MODULE_CLKCTRL_IDLEST_DISABLED;
|
|
|
|
/* Do not add any spl_debug prints in this function */
|
|
clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
|
|
CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
|
|
CD_CLKCTRL_CLKTRCTRL_SHIFT);
|
|
|
|
/* Enable UART0 */
|
|
clrsetbits_le32(&cmwkup->wkup_uart0ctrl,
|
|
MODULE_CLKCTRL_MODULEMODE_MASK,
|
|
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
|
|
MODULE_CLKCTRL_MODULEMODE_SHIFT);
|
|
|
|
while ((idlest == MODULE_CLKCTRL_IDLEST_DISABLED) ||
|
|
(idlest == MODULE_CLKCTRL_IDLEST_TRANSITIONING)) {
|
|
clkctrl = readl(&cmwkup->wkup_uart0ctrl);
|
|
idlest = (clkctrl & MODULE_CLKCTRL_IDLEST_MASK) >>
|
|
MODULE_CLKCTRL_IDLEST_SHIFT;
|
|
}
|
|
}
|
|
|
|
void enable_basic_clocks(void)
|
|
{
|
|
u32 *const clk_domains[] = {
|
|
&cmper->l3clkstctrl,
|
|
&cmper->l3sclkstctrl,
|
|
&cmper->l4lsclkstctrl,
|
|
&cmwkup->wkclkstctrl,
|
|
&cmper->emifclkstctrl,
|
|
0
|
|
};
|
|
|
|
u32 *const clk_modules_explicit_en[] = {
|
|
&cmper->l3clkctrl,
|
|
&cmper->l4lsclkctrl,
|
|
&cmper->l4fwclkctrl,
|
|
&cmwkup->wkl4wkclkctrl,
|
|
&cmper->l3instrclkctrl,
|
|
&cmper->l4hsclkctrl,
|
|
&cmwkup->wkgpio0clkctrl,
|
|
&cmwkup->wkctrlclkctrl,
|
|
&cmper->timer2clkctrl,
|
|
&cmper->gpmcclkctrl,
|
|
&cmper->elmclkctrl,
|
|
&cmper->mmc0clkctrl,
|
|
&cmper->mmc1clkctrl,
|
|
&cmwkup->wkup_i2c0ctrl,
|
|
&cmper->gpio1clkctrl,
|
|
&cmper->gpio2clkctrl,
|
|
&cmper->gpio3clkctrl,
|
|
&cmper->gpio4clkctrl,
|
|
&cmper->gpio5clkctrl,
|
|
&cmper->i2c1clkctrl,
|
|
&cmper->cpgmac0clkctrl,
|
|
&cmper->emiffwclkctrl,
|
|
&cmper->emifclkctrl,
|
|
&cmper->otfaemifclkctrl,
|
|
&cmper->qspiclkctrl,
|
|
0
|
|
};
|
|
|
|
do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
|
|
|
|
/* Select the Master osc clk as Timer2 clock source */
|
|
writel(0x1, &cmdpll->clktimer2clk);
|
|
}
|