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u-boot/arch/arm/mach-imx/mx8m/clock.c

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
// SPDX-License-Identifier: GPL-2.0+
imx: mx8m: add clock driver Add clock driver to support i.MX8M. There are two kind PLLs, FRAC pll and SSCG pll. ROM already configured SYS PLL1/2, we only need to configure the output. ocotp/i2c/pll decoding and configuration/usdhc/lcdif/dram pll/ enet clock are configured in the code. Signed-off-by: Peng Fan <peng.fan@nxp.com> Cc: Fabio Estevam <fabio.estevam@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
2018-01-10 05:20:22 +00:00
/*
* Copyright 2017 NXP
*
* Peng Fan <peng.fan@nxp.com>
*/
#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/io.h>
#include <asm/arch/sys_proto.h>
#include <errno.h>
#include <linux/iopoll.h>
static struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
static u32 decode_frac_pll(enum clk_root_src frac_pll)
{
u32 pll_cfg0, pll_cfg1, pllout;
u32 pll_refclk_sel, pll_refclk;
u32 divr_val, divq_val, divf_val, divff, divfi;
u32 pllout_div_shift, pllout_div_mask, pllout_div;
switch (frac_pll) {
case ARM_PLL_CLK:
pll_cfg0 = readl(&ana_pll->arm_pll_cfg0);
pll_cfg1 = readl(&ana_pll->arm_pll_cfg1);
pllout_div_shift = HW_FRAC_ARM_PLL_DIV_SHIFT;
pllout_div_mask = HW_FRAC_ARM_PLL_DIV_MASK;
break;
default:
printf("Frac PLL %d not supporte\n", frac_pll);
return 0;
}
pllout_div = readl(&ana_pll->frac_pllout_div_cfg);
pllout_div = (pllout_div & pllout_div_mask) >> pllout_div_shift;
/* Power down */
if (pll_cfg0 & FRAC_PLL_PD_MASK)
return 0;
/* output not enabled */
if ((pll_cfg0 & FRAC_PLL_CLKE_MASK) == 0)
return 0;
pll_refclk_sel = pll_cfg0 & FRAC_PLL_REFCLK_SEL_MASK;
if (pll_refclk_sel == FRAC_PLL_REFCLK_SEL_OSC_25M)
pll_refclk = 25000000u;
else if (pll_refclk_sel == FRAC_PLL_REFCLK_SEL_OSC_27M)
pll_refclk = 27000000u;
else if (pll_refclk_sel == FRAC_PLL_REFCLK_SEL_HDMI_PHY_27M)
pll_refclk = 27000000u;
else
pll_refclk = 0;
if (pll_cfg0 & FRAC_PLL_BYPASS_MASK)
return pll_refclk;
divr_val = (pll_cfg0 & FRAC_PLL_REFCLK_DIV_VAL_MASK) >>
FRAC_PLL_REFCLK_DIV_VAL_SHIFT;
divq_val = pll_cfg0 & FRAC_PLL_OUTPUT_DIV_VAL_MASK;
divff = (pll_cfg1 & FRAC_PLL_FRAC_DIV_CTL_MASK) >>
FRAC_PLL_FRAC_DIV_CTL_SHIFT;
divfi = pll_cfg1 & FRAC_PLL_INT_DIV_CTL_MASK;
divf_val = 1 + divfi + divff / (1 << 24);
pllout = pll_refclk / (divr_val + 1) * 8 * divf_val /
((divq_val + 1) * 2);
return pllout / (pllout_div + 1);
}
static u32 decode_sscg_pll(enum clk_root_src sscg_pll)
{
u32 pll_cfg0, pll_cfg1, pll_cfg2;
u32 pll_refclk_sel, pll_refclk;
u32 divr1, divr2, divf1, divf2, divq, div;
u32 sse;
u32 pll_clke;
u32 pllout_div_shift, pllout_div_mask, pllout_div;
u32 pllout;
switch (sscg_pll) {
case SYSTEM_PLL1_800M_CLK:
case SYSTEM_PLL1_400M_CLK:
case SYSTEM_PLL1_266M_CLK:
case SYSTEM_PLL1_200M_CLK:
case SYSTEM_PLL1_160M_CLK:
case SYSTEM_PLL1_133M_CLK:
case SYSTEM_PLL1_100M_CLK:
case SYSTEM_PLL1_80M_CLK:
case SYSTEM_PLL1_40M_CLK:
pll_cfg0 = readl(&ana_pll->sys_pll1_cfg0);
pll_cfg1 = readl(&ana_pll->sys_pll1_cfg1);
pll_cfg2 = readl(&ana_pll->sys_pll1_cfg2);
pllout_div_shift = HW_SSCG_SYSTEM_PLL1_DIV_SHIFT;
pllout_div_mask = HW_SSCG_SYSTEM_PLL1_DIV_MASK;
break;
case SYSTEM_PLL2_1000M_CLK:
case SYSTEM_PLL2_500M_CLK:
case SYSTEM_PLL2_333M_CLK:
case SYSTEM_PLL2_250M_CLK:
case SYSTEM_PLL2_200M_CLK:
case SYSTEM_PLL2_166M_CLK:
case SYSTEM_PLL2_125M_CLK:
case SYSTEM_PLL2_100M_CLK:
case SYSTEM_PLL2_50M_CLK:
pll_cfg0 = readl(&ana_pll->sys_pll2_cfg0);
pll_cfg1 = readl(&ana_pll->sys_pll2_cfg1);
pll_cfg2 = readl(&ana_pll->sys_pll2_cfg2);
pllout_div_shift = HW_SSCG_SYSTEM_PLL2_DIV_SHIFT;
pllout_div_mask = HW_SSCG_SYSTEM_PLL2_DIV_MASK;
break;
case SYSTEM_PLL3_CLK:
pll_cfg0 = readl(&ana_pll->sys_pll3_cfg0);
pll_cfg1 = readl(&ana_pll->sys_pll3_cfg1);
pll_cfg2 = readl(&ana_pll->sys_pll3_cfg2);
pllout_div_shift = HW_SSCG_SYSTEM_PLL3_DIV_SHIFT;
pllout_div_mask = HW_SSCG_SYSTEM_PLL3_DIV_MASK;
break;
case DRAM_PLL1_CLK:
pll_cfg0 = readl(&ana_pll->dram_pll_cfg0);
pll_cfg1 = readl(&ana_pll->dram_pll_cfg1);
pll_cfg2 = readl(&ana_pll->dram_pll_cfg2);
pllout_div_shift = HW_SSCG_DRAM_PLL_DIV_SHIFT;
pllout_div_mask = HW_SSCG_DRAM_PLL_DIV_MASK;
break;
default:
printf("sscg pll %d not supporte\n", sscg_pll);
return 0;
}
switch (sscg_pll) {
case DRAM_PLL1_CLK:
pll_clke = SSCG_PLL_DRAM_PLL_CLKE_MASK;
div = 1;
break;
case SYSTEM_PLL3_CLK:
pll_clke = SSCG_PLL_PLL3_CLKE_MASK;
div = 1;
break;
case SYSTEM_PLL2_1000M_CLK:
case SYSTEM_PLL1_800M_CLK:
pll_clke = SSCG_PLL_CLKE_MASK;
div = 1;
break;
case SYSTEM_PLL2_500M_CLK:
case SYSTEM_PLL1_400M_CLK:
pll_clke = SSCG_PLL_DIV2_CLKE_MASK;
div = 2;
break;
case SYSTEM_PLL2_333M_CLK:
case SYSTEM_PLL1_266M_CLK:
pll_clke = SSCG_PLL_DIV3_CLKE_MASK;
div = 3;
break;
case SYSTEM_PLL2_250M_CLK:
case SYSTEM_PLL1_200M_CLK:
pll_clke = SSCG_PLL_DIV4_CLKE_MASK;
div = 4;
break;
case SYSTEM_PLL2_200M_CLK:
case SYSTEM_PLL1_160M_CLK:
pll_clke = SSCG_PLL_DIV5_CLKE_MASK;
div = 5;
break;
case SYSTEM_PLL2_166M_CLK:
case SYSTEM_PLL1_133M_CLK:
pll_clke = SSCG_PLL_DIV6_CLKE_MASK;
div = 6;
break;
case SYSTEM_PLL2_125M_CLK:
case SYSTEM_PLL1_100M_CLK:
pll_clke = SSCG_PLL_DIV8_CLKE_MASK;
div = 8;
break;
case SYSTEM_PLL2_100M_CLK:
case SYSTEM_PLL1_80M_CLK:
pll_clke = SSCG_PLL_DIV10_CLKE_MASK;
div = 10;
break;
case SYSTEM_PLL2_50M_CLK:
case SYSTEM_PLL1_40M_CLK:
pll_clke = SSCG_PLL_DIV20_CLKE_MASK;
div = 20;
break;
default:
printf("sscg pll %d not supporte\n", sscg_pll);
return 0;
}
/* Power down */
if (pll_cfg0 & SSCG_PLL_PD_MASK)
return 0;
/* output not enabled */
if ((pll_cfg0 & pll_clke) == 0)
return 0;
pllout_div = readl(&ana_pll->sscg_pllout_div_cfg);
pllout_div = (pllout_div & pllout_div_mask) >> pllout_div_shift;
pll_refclk_sel = pll_cfg0 & SSCG_PLL_REFCLK_SEL_MASK;
if (pll_refclk_sel == SSCG_PLL_REFCLK_SEL_OSC_25M)
pll_refclk = 25000000u;
else if (pll_refclk_sel == SSCG_PLL_REFCLK_SEL_OSC_27M)
pll_refclk = 27000000u;
else if (pll_refclk_sel == SSCG_PLL_REFCLK_SEL_HDMI_PHY_27M)
pll_refclk = 27000000u;
else
pll_refclk = 0;
/* We assume bypass1/2 are the same value */
if ((pll_cfg0 & SSCG_PLL_BYPASS1_MASK) ||
(pll_cfg0 & SSCG_PLL_BYPASS2_MASK))
return pll_refclk;
divr1 = (pll_cfg2 & SSCG_PLL_REF_DIVR1_MASK) >>
SSCG_PLL_REF_DIVR1_SHIFT;
divr2 = (pll_cfg2 & SSCG_PLL_REF_DIVR2_MASK) >>
SSCG_PLL_REF_DIVR2_SHIFT;
divf1 = (pll_cfg2 & SSCG_PLL_FEEDBACK_DIV_F1_MASK) >>
SSCG_PLL_FEEDBACK_DIV_F1_SHIFT;
divf2 = (pll_cfg2 & SSCG_PLL_FEEDBACK_DIV_F2_MASK) >>
SSCG_PLL_FEEDBACK_DIV_F2_SHIFT;
divq = (pll_cfg2 & SSCG_PLL_OUTPUT_DIV_VAL_MASK) >>
SSCG_PLL_OUTPUT_DIV_VAL_SHIFT;
sse = pll_cfg1 & SSCG_PLL_SSE_MASK;
if (sse)
sse = 8;
else
sse = 2;
pllout = pll_refclk / (divr1 + 1) * sse * (divf1 + 1) /
(divr2 + 1) * (divf2 + 1) / (divq + 1);
return pllout / (pllout_div + 1) / div;
}
static u32 get_root_src_clk(enum clk_root_src root_src)
{
switch (root_src) {
case OSC_25M_CLK:
return 25000000;
case OSC_27M_CLK:
return 25000000;
case OSC_32K_CLK:
return 32000;
case ARM_PLL_CLK:
return decode_frac_pll(root_src);
case SYSTEM_PLL1_800M_CLK:
case SYSTEM_PLL1_400M_CLK:
case SYSTEM_PLL1_266M_CLK:
case SYSTEM_PLL1_200M_CLK:
case SYSTEM_PLL1_160M_CLK:
case SYSTEM_PLL1_133M_CLK:
case SYSTEM_PLL1_100M_CLK:
case SYSTEM_PLL1_80M_CLK:
case SYSTEM_PLL1_40M_CLK:
case SYSTEM_PLL2_1000M_CLK:
case SYSTEM_PLL2_500M_CLK:
case SYSTEM_PLL2_333M_CLK:
case SYSTEM_PLL2_250M_CLK:
case SYSTEM_PLL2_200M_CLK:
case SYSTEM_PLL2_166M_CLK:
case SYSTEM_PLL2_125M_CLK:
case SYSTEM_PLL2_100M_CLK:
case SYSTEM_PLL2_50M_CLK:
case SYSTEM_PLL3_CLK:
return decode_sscg_pll(root_src);
default:
return 0;
}
return 0;
}
static u32 get_root_clk(enum clk_root_index clock_id)
{
enum clk_root_src root_src;
u32 post_podf, pre_podf, root_src_clk;
if (clock_root_enabled(clock_id) <= 0)
return 0;
if (clock_get_prediv(clock_id, &pre_podf) < 0)
return 0;
if (clock_get_postdiv(clock_id, &post_podf) < 0)
return 0;
if (clock_get_src(clock_id, &root_src) < 0)
return 0;
root_src_clk = get_root_src_clk(root_src);
return root_src_clk / (post_podf + 1) / (pre_podf + 1);
}
#ifdef CONFIG_MXC_OCOTP
void enable_ocotp_clk(unsigned char enable)
{
clock_enable(CCGR_OCOTP, !!enable);
}
#endif
int enable_i2c_clk(unsigned char enable, unsigned int i2c_num)
{
/* 0 - 3 is valid i2c num */
if (i2c_num > 3)
return -EINVAL;
clock_enable(CCGR_I2C1 + i2c_num, !!enable);
return 0;
}
unsigned int mxc_get_clock(enum clk_root_index clk)
{
u32 val;
if (clk >= CLK_ROOT_MAX)
return 0;
if (clk == MXC_ARM_CLK)
return get_root_clk(ARM_A53_CLK_ROOT);
if (clk == MXC_IPG_CLK) {
clock_get_target_val(IPG_CLK_ROOT, &val);
val = val & 0x3;
return get_root_clk(AHB_CLK_ROOT) / (val + 1);
}
return get_root_clk(clk);
}
u32 imx_get_uartclk(void)
{
return mxc_get_clock(UART1_CLK_ROOT);
}
void mxs_set_lcdclk(u32 base_addr, u32 freq)
{
/*
* LCDIF_PIXEL_CLK: select 800MHz root clock,
* select pre divider 8, output is 100 MHz
*/
clock_set_target_val(LCDIF_PIXEL_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(4) |
CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV8));
}
void init_wdog_clk(void)
{
clock_enable(CCGR_WDOG1, 0);
clock_enable(CCGR_WDOG2, 0);
clock_enable(CCGR_WDOG3, 0);
clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_set_target_val(WDOG_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_enable(CCGR_WDOG1, 1);
clock_enable(CCGR_WDOG2, 1);
clock_enable(CCGR_WDOG3, 1);
}
void init_usb_clk(void)
{
if (!is_usb_boot()) {
clock_enable(CCGR_USB_CTRL1, 0);
clock_enable(CCGR_USB_CTRL2, 0);
clock_enable(CCGR_USB_PHY1, 0);
clock_enable(CCGR_USB_PHY2, 0);
/* 500MHz */
clock_set_target_val(USB_BUS_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
/* 100MHz */
clock_set_target_val(USB_CORE_REF_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
/* 100MHz */
clock_set_target_val(USB_PHY_REF_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
clock_enable(CCGR_USB_CTRL1, 1);
clock_enable(CCGR_USB_CTRL2, 1);
clock_enable(CCGR_USB_PHY1, 1);
clock_enable(CCGR_USB_PHY2, 1);
}
}
void init_uart_clk(u32 index)
{
/* Set uart clock root 25M OSC */
switch (index) {
case 0:
clock_enable(CCGR_UART1, 0);
clock_set_target_val(UART1_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_enable(CCGR_UART1, 1);
return;
case 1:
clock_enable(CCGR_UART2, 0);
clock_set_target_val(UART2_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_enable(CCGR_UART2, 1);
return;
case 2:
clock_enable(CCGR_UART3, 0);
clock_set_target_val(UART3_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_enable(CCGR_UART3, 1);
return;
case 3:
clock_enable(CCGR_UART4, 0);
clock_set_target_val(UART4_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
clock_enable(CCGR_UART4, 1);
return;
default:
printf("Invalid uart index\n");
return;
}
}
void init_clk_usdhc(u32 index)
{
/*
* set usdhc clock root
* sys pll1 400M
*/
switch (index) {
case 0:
clock_enable(CCGR_USDHC1, 0);
clock_set_target_val(USDHC1_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2));
clock_enable(CCGR_USDHC1, 1);
return;
case 1:
clock_enable(CCGR_USDHC2, 0);
clock_set_target_val(USDHC2_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2));
clock_enable(CCGR_USDHC2, 1);
return;
default:
printf("Invalid usdhc index\n");
return;
}
}
int set_clk_qspi(void)
{
/*
* set qspi root
* sys pll1 100M
*/
clock_enable(CCGR_QSPI, 0);
clock_set_target_val(QSPI_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(7));
clock_enable(CCGR_QSPI, 1);
return 0;
}
#ifdef CONFIG_FEC_MXC
int set_clk_enet(enum enet_freq type)
{
u32 target;
u32 enet1_ref;
switch (type) {
case ENET_125MHZ:
enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_125M_CLK;
break;
case ENET_50MHZ:
enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_50M_CLK;
break;
case ENET_25MHZ:
enet1_ref = ENET1_REF_CLK_ROOT_FROM_PLL_ENET_MAIN_25M_CLK;
break;
default:
return -EINVAL;
}
/* disable the clock first */
clock_enable(CCGR_ENET1, 0);
clock_enable(CCGR_SIM_ENET, 0);
/* set enet axi clock 266Mhz */
target = CLK_ROOT_ON | ENET_AXI_CLK_ROOT_FROM_SYS1_PLL_266M |
CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1);
clock_set_target_val(ENET_AXI_CLK_ROOT, target);
target = CLK_ROOT_ON | enet1_ref |
CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1);
clock_set_target_val(ENET_REF_CLK_ROOT, target);
target = CLK_ROOT_ON |
ENET1_TIME_CLK_ROOT_FROM_PLL_ENET_MAIN_100M_CLK |
CLK_ROOT_PRE_DIV(CLK_ROOT_PRE_DIV1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV4);
clock_set_target_val(ENET_TIMER_CLK_ROOT, target);
/* enable clock */
clock_enable(CCGR_SIM_ENET, 1);
clock_enable(CCGR_ENET1, 1);
return 0;
}
#endif
u32 imx_get_fecclk(void)
{
return get_root_clk(ENET_AXI_CLK_ROOT);
}
#ifdef CONFIG_SPL_BUILD
void dram_pll_init(void)
{
struct src *src = (struct src *)SRC_BASE_ADDR;
void __iomem *pll_control_reg = &ana_pll->dram_pll_cfg0;
u32 pwdn_mask = 0, pll_clke = 0, bypass1 = 0, bypass2 = 0;
u32 val;
int ret;
setbits_le32(GPC_BASE_ADDR + 0xEC, BIT(7));
setbits_le32(GPC_BASE_ADDR + 0xF8, BIT(5));
pwdn_mask = SSCG_PLL_PD_MASK;
pll_clke = SSCG_PLL_DRAM_PLL_CLKE_MASK;
bypass1 = SSCG_PLL_BYPASS1_MASK;
bypass2 = SSCG_PLL_BYPASS2_MASK;
/* Enable DDR1 and DDR2 domain */
writel(SRC_DDR1_ENABLE_MASK, &src->ddr1_rcr);
writel(SRC_DDR1_ENABLE_MASK, &src->ddr2_rcr);
/* Clear power down bit */
clrbits_le32(pll_control_reg, pwdn_mask);
/* Eanble ARM_PLL/SYS_PLL */
setbits_le32(pll_control_reg, pll_clke);
/* Clear bypass */
clrbits_le32(pll_control_reg, bypass1);
__udelay(100);
clrbits_le32(pll_control_reg, bypass2);
/* Wait lock */
ret = readl_poll_timeout(pll_control_reg, val,
val & SSCG_PLL_LOCK_MASK, 1);
if (ret)
printf("%s timeout\n", __func__);
}
int frac_pll_init(u32 pll, enum frac_pll_out_val val)
{
void __iomem *pll_cfg0, __iomem *pll_cfg1;
u32 val_cfg0, val_cfg1;
int ret;
switch (pll) {
case ANATOP_ARM_PLL:
pll_cfg0 = &ana_pll->arm_pll_cfg0;
pll_cfg1 = &ana_pll->arm_pll_cfg1;
if (val == FRAC_PLL_OUT_1000M)
val_cfg1 = FRAC_PLL_INT_DIV_CTL_VAL(49);
else
val_cfg1 = FRAC_PLL_INT_DIV_CTL_VAL(79);
val_cfg0 = FRAC_PLL_CLKE_MASK | FRAC_PLL_REFCLK_SEL_OSC_25M |
FRAC_PLL_LOCK_SEL_MASK | FRAC_PLL_NEWDIV_VAL_MASK |
FRAC_PLL_REFCLK_DIV_VAL(4) |
FRAC_PLL_OUTPUT_DIV_VAL(0);
break;
default:
return -EINVAL;
}
/* bypass the clock */
setbits_le32(pll_cfg0, FRAC_PLL_BYPASS_MASK);
/* Set the value */
writel(val_cfg1, pll_cfg1);
writel(val_cfg0 | FRAC_PLL_BYPASS_MASK, pll_cfg0);
val_cfg0 = readl(pll_cfg0);
/* unbypass the clock */
clrbits_le32(pll_cfg0, FRAC_PLL_BYPASS_MASK);
ret = readl_poll_timeout(pll_cfg0, val_cfg0,
val_cfg0 & FRAC_PLL_LOCK_MASK, 1);
if (ret)
printf("%s timeout\n", __func__);
clrbits_le32(pll_cfg0, FRAC_PLL_NEWDIV_VAL_MASK);
return 0;
}
int sscg_pll_init(u32 pll)
{
void __iomem *pll_cfg0, __iomem *pll_cfg1, __iomem *pll_cfg2;
u32 val_cfg0, val_cfg1, val_cfg2, val;
u32 bypass1_mask = 0x20, bypass2_mask = 0x10;
int ret;
switch (pll) {
case ANATOP_SYSTEM_PLL1:
pll_cfg0 = &ana_pll->sys_pll1_cfg0;
pll_cfg1 = &ana_pll->sys_pll1_cfg1;
pll_cfg2 = &ana_pll->sys_pll1_cfg2;
/* 800MHz */
val_cfg2 = SSCG_PLL_FEEDBACK_DIV_F1_VAL(3) |
SSCG_PLL_FEEDBACK_DIV_F2_VAL(3);
val_cfg1 = 0;
val_cfg0 = SSCG_PLL_CLKE_MASK | SSCG_PLL_DIV2_CLKE_MASK |
SSCG_PLL_DIV3_CLKE_MASK | SSCG_PLL_DIV4_CLKE_MASK |
SSCG_PLL_DIV5_CLKE_MASK | SSCG_PLL_DIV6_CLKE_MASK |
SSCG_PLL_DIV8_CLKE_MASK | SSCG_PLL_DIV10_CLKE_MASK |
SSCG_PLL_DIV20_CLKE_MASK | SSCG_PLL_LOCK_SEL_MASK |
SSCG_PLL_REFCLK_SEL_OSC_25M;
break;
case ANATOP_SYSTEM_PLL2:
pll_cfg0 = &ana_pll->sys_pll2_cfg0;
pll_cfg1 = &ana_pll->sys_pll2_cfg1;
pll_cfg2 = &ana_pll->sys_pll2_cfg2;
/* 1000MHz */
val_cfg2 = SSCG_PLL_FEEDBACK_DIV_F1_VAL(3) |
SSCG_PLL_FEEDBACK_DIV_F2_VAL(4);
val_cfg1 = 0;
val_cfg0 = SSCG_PLL_CLKE_MASK | SSCG_PLL_DIV2_CLKE_MASK |
SSCG_PLL_DIV3_CLKE_MASK | SSCG_PLL_DIV4_CLKE_MASK |
SSCG_PLL_DIV5_CLKE_MASK | SSCG_PLL_DIV6_CLKE_MASK |
SSCG_PLL_DIV8_CLKE_MASK | SSCG_PLL_DIV10_CLKE_MASK |
SSCG_PLL_DIV20_CLKE_MASK | SSCG_PLL_LOCK_SEL_MASK |
SSCG_PLL_REFCLK_SEL_OSC_25M;
break;
case ANATOP_SYSTEM_PLL3:
pll_cfg0 = &ana_pll->sys_pll3_cfg0;
pll_cfg1 = &ana_pll->sys_pll3_cfg1;
pll_cfg2 = &ana_pll->sys_pll3_cfg2;
/* 800MHz */
val_cfg2 = SSCG_PLL_FEEDBACK_DIV_F1_VAL(3) |
SSCG_PLL_FEEDBACK_DIV_F2_VAL(3);
val_cfg1 = 0;
val_cfg0 = SSCG_PLL_PLL3_CLKE_MASK | SSCG_PLL_LOCK_SEL_MASK |
SSCG_PLL_REFCLK_SEL_OSC_25M;
break;
default:
return -EINVAL;
}
/*bypass*/
setbits_le32(pll_cfg0, bypass1_mask | bypass2_mask);
/* set value */
writel(val_cfg2, pll_cfg2);
writel(val_cfg1, pll_cfg1);
/*unbypass1 and wait 70us */
writel(val_cfg0 | bypass2_mask, pll_cfg1);
__udelay(70);
/* unbypass2 and wait lock */
writel(val_cfg0, pll_cfg1);
ret = readl_poll_timeout(pll_cfg0, val, val & SSCG_PLL_LOCK_MASK, 1);
if (ret)
printf("%s timeout\n", __func__);
return ret;
}
int clock_init(void)
{
u32 grade;
clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(0));
/*
* 8MQ only supports two grades: consumer and industrial.
* We set ARM clock to 1Ghz for consumer, 800Mhz for industrial
*/
grade = get_cpu_temp_grade(NULL, NULL);
if (!grade) {
frac_pll_init(ANATOP_ARM_PLL, FRAC_PLL_OUT_1000M);
clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV1));
} else {
frac_pll_init(ANATOP_ARM_PLL, FRAC_PLL_OUT_1600M);
clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1) |
CLK_ROOT_POST_DIV(CLK_ROOT_POST_DIV2));
}
/*
* According to ANAMIX SPEC
* sys pll1 fixed at 800MHz
* sys pll2 fixed at 1GHz
* Here we only enable the outputs.
*/
setbits_le32(&ana_pll->sys_pll1_cfg0, SSCG_PLL_CLKE_MASK |
SSCG_PLL_DIV2_CLKE_MASK | SSCG_PLL_DIV3_CLKE_MASK |
SSCG_PLL_DIV4_CLKE_MASK | SSCG_PLL_DIV5_CLKE_MASK |
SSCG_PLL_DIV6_CLKE_MASK | SSCG_PLL_DIV8_CLKE_MASK |
SSCG_PLL_DIV10_CLKE_MASK | SSCG_PLL_DIV20_CLKE_MASK);
setbits_le32(&ana_pll->sys_pll2_cfg0, SSCG_PLL_CLKE_MASK |
SSCG_PLL_DIV2_CLKE_MASK | SSCG_PLL_DIV3_CLKE_MASK |
SSCG_PLL_DIV4_CLKE_MASK | SSCG_PLL_DIV5_CLKE_MASK |
SSCG_PLL_DIV6_CLKE_MASK | SSCG_PLL_DIV8_CLKE_MASK |
SSCG_PLL_DIV10_CLKE_MASK | SSCG_PLL_DIV20_CLKE_MASK);
clock_set_target_val(NAND_USDHC_BUS_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));
init_wdog_clk();
clock_enable(CCGR_TSENSOR, 1);
return 0;
}
#endif
/*
* Dump some clockes.
*/
#ifndef CONFIG_SPL_BUILD
int do_mx8m_showclocks(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
u32 freq;
freq = decode_frac_pll(ARM_PLL_CLK);
printf("ARM_PLL %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_800M_CLK);
printf("SYS_PLL1_800 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_400M_CLK);
printf("SYS_PLL1_400 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_266M_CLK);
printf("SYS_PLL1_266 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_200M_CLK);
printf("SYS_PLL1_200 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_160M_CLK);
printf("SYS_PLL1_160 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_133M_CLK);
printf("SYS_PLL1_133 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_100M_CLK);
printf("SYS_PLL1_100 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_80M_CLK);
printf("SYS_PLL1_80 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL1_40M_CLK);
printf("SYS_PLL1_40 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_1000M_CLK);
printf("SYS_PLL2_1000 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_500M_CLK);
printf("SYS_PLL2_500 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_333M_CLK);
printf("SYS_PLL2_333 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_250M_CLK);
printf("SYS_PLL2_250 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_200M_CLK);
printf("SYS_PLL2_200 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_166M_CLK);
printf("SYS_PLL2_166 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_125M_CLK);
printf("SYS_PLL2_125 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_100M_CLK);
printf("SYS_PLL2_100 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL2_50M_CLK);
printf("SYS_PLL2_50 %8d MHz\n", freq / 1000000);
freq = decode_sscg_pll(SYSTEM_PLL3_CLK);
printf("SYS_PLL3 %8d MHz\n", freq / 1000000);
freq = mxc_get_clock(UART1_CLK_ROOT);
printf("UART1 %8d MHz\n", freq / 1000000);
freq = mxc_get_clock(USDHC1_CLK_ROOT);
printf("USDHC1 %8d MHz\n", freq / 1000000);
freq = mxc_get_clock(QSPI_CLK_ROOT);
printf("QSPI %8d MHz\n", freq / 1000000);
return 0;
}
U_BOOT_CMD(
clocks, CONFIG_SYS_MAXARGS, 1, do_mx8m_showclocks,
"display clocks",
""
);
#endif
Reference in a new issue Copy permalink