[PATCH] ram: k3-ddrss: Add exit retention support
Francis, Neha
n-francis at ti.com
Mon Feb 9 18:15:20 CET 2026
Hi Prasanth
On 1/27/2026 5:42 PM, Prasanth Babu Mantena wrote:
> From: Thomas Richard <thomas.richard at bootlin.com>
>
> Add functions that implements retention exit sequence of DDR.
>
> Typical DDR resume sequence is:
> - exit DDR from retention
> - de-assert the DDR_RET pin
> - restore DDR max frequency
> - exit DDR from low power
>
> We have to separate each action in order to de-assert the DDR_RET pins
> at the right time, because the DDR_RET pins are all tied together
> in hardware.
> Additional interleaving to be taken care and configuring of PMIC differs
> device to device depending on number of PMIC.
>
> Signed-off-by: Thomas Richard <thomas.richard at bootlin.com>
> Signed-off-by: Prasanth Babu Mantena <p-mantena at ti.com>
> ---
> arch/arm/mach-k3/include/mach/k3-ddr.h | 16 ++
> drivers/ram/k3-ddrss/k3-ddrss.c | 253 +++++++++++++++++++++++++
> drivers/ram/k3-ddrss/lpddr4_k3_reg.h | 120 ++++++++++++
> 3 files changed, 389 insertions(+)
> create mode 100644 drivers/ram/k3-ddrss/lpddr4_k3_reg.h
>
> diff --git a/arch/arm/mach-k3/include/mach/k3-ddr.h b/arch/arm/mach-k3/include/mach/k3-ddr.h
> index 207e60b2763..c82c25ba285 100644
> --- a/arch/arm/mach-k3/include/mach/k3-ddr.h
> +++ b/arch/arm/mach-k3/include/mach/k3-ddr.h
> @@ -7,6 +7,7 @@
> #define _K3_DDR_H_
>
> #include <spl.h>
> +#include <compiler.h>
>
> /* We need 3 extra entries for:
> * SoC peripherals, flash and the sentinel value.
> @@ -14,10 +15,25 @@
> #define K3_MEM_MAP_LEN ((CONFIG_NR_DRAM_BANKS) + 3)
> #define K3_MEM_MAP_FIRST_BANK_IDX 2
>
> +struct k3_ddrss_regs {
Looks like these are not generic K3 DDRSS register struct, so it should be named
perhaps k3_ddrss_ret_reg
> + u32 ctl_141;
> + u32 phy_1305;
> + u32 ctl_88;
> + u32 pi_134;
> + u32 pi_7;
> + u32 ctl_20;
> + u32 wdqlvl_f1;
> + u32 wdqlvl_f2;
> +};
> +
> int dram_init(void);
> int dram_init_banksize(void);
>
> void fixup_ddr_driver_for_ecc(struct spl_image_info *spl_image);
> void fixup_memory_node(struct spl_image_info *spl_image);
>
> +/* LPDDR4 power management functions */
> +void k3_ddrss_lpddr4_exit_retention(struct udevice *dev, struct k3_ddrss_regs *regs);
> +void k3_ddrss_lpddr4_change_freq(struct udevice *dev);
> +void k3_ddrss_lpddr4_exit_low_power(struct udevice *dev, struct k3_ddrss_regs *regs);
> #endif /* _K3_DDR_H_ */
> diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c
> index 5144470b931..140bd7678bb 100644
> --- a/drivers/ram/k3-ddrss/k3-ddrss.c
> +++ b/drivers/ram/k3-ddrss/k3-ddrss.c
> @@ -19,11 +19,13 @@
> #include <power-domain.h>
> #include <wait_bit.h>
> #include <power/regulator.h>
> +#include <mach/k3-ddr.h>
>
> #include "lpddr4_obj_if.h"
> #include "lpddr4_if.h"
> #include "lpddr4_structs_if.h"
> #include "lpddr4_ctl_regs.h"
> +#include "lpddr4_k3_reg.h"
>
> #define SRAM_MAX 512
>
> @@ -438,6 +440,257 @@ static int k3_ddrss_ofdata_to_priv(struct udevice *dev)
> return ret;
> }
>
> +#if defined(CONFIG_K3_J721E_DDRSS)
> +
> +void k3_ddrss_lpddr4_exit_retention(struct udevice *dev,
> + struct k3_ddrss_regs *regs)
> +{
> + struct k3_ddrss_desc *ddrss = dev_get_priv(dev);
> + u32 regval;
> + unsigned int pll_ctrl;
This variable can remain uninitialized especially since the switch you're using
to assign it below, doesn't have a default case.
> + volatile unsigned int val;
> +
> + /*
> + * Saving registers
> + */
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_141, ®s->ctl_141);
> + lpddr4_k3_readreg_phy(ddrss, DENALI_PHY_1305, ®s->phy_1305);
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_88, ®s->ctl_88);
> + lpddr4_k3_readreg_pi(ddrss, DENALI_PI_134, ®s->pi_134);
> + // PI_139 cannot be restored
Use consistent Linux guideline commenting (/* */)
> + lpddr4_k3_readreg_pi(ddrss, DENALI_PI_7, ®s->pi_7);
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_20, ®s->ctl_20);
> +
> + /* disable auto entry / exit */
> + lpddr4_k3_clr_ctl(ddrss, DENALI_CTL_141, (0xF << 24) | (0xF << 16));
> +
> + /* Configure DFI Interface, DDR retention exit occurs through PHY */
> + lpddr4_k3_readreg_phy(ddrss, LPDDR4__PHY_SET_DFI_INPUT_0__REG, ®val);
> + regval &= ~0xF0F; // Set DFI_Input_1 = 0
> + regval |= 0x01; // Set DFI Input_0 = 1
> + lpddr4_k3_writereg_phy(ddrss, LPDDR4__PHY_SET_DFI_INPUT_0__REG, regval);
> +
> + /* PWRUP_SREFRESH_EXIT = 1 */
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__PWRUP_SREFRESH_EXIT__REG, 0x1);
> +
> + /* PI_PWRUP_SREFRESH_EXIT = 0 */
> + lpddr4_k3_clr_pi(ddrss, LPDDR4__PI_PWRUP_SREFRESH_EXIT__REG, 0x1 << 16);
> +
> + /* PI_DRAM_INIT_EN = 0 */
> + lpddr4_k3_clr_pi(ddrss, LPDDR4__PI_DRAM_INIT_EN__REG, 0x1 << 8);
> +
> + /* PI_DFI_PHYMSTR_STATE_SEL_R = 1 (force memory into self-refresh) */
> + lpddr4_k3_set_pi(ddrss, LPDDR4__PI_DFI_PHYMSTR_STATE_SEL_R__REG, (1 << 24));
> +
> + /* PHY_INDEP_INIT_MODE = 0 */
> + lpddr4_k3_clr_ctl(ddrss, LPDDR4__PHY_INDEP_INIT_MODE__REG, (0x1 << 16));
> +
> + /* PHY_INDEP_TRAIN_MODE = 1 */
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__PHY_INDEP_TRAIN_MODE__REG, 0x1);
> +
> + lpddr4_k3_readreg_pi(ddrss, LPDDR4__PI_WDQLVL_EN_F1__REG, ®s->wdqlvl_f1);
> + regs->wdqlvl_f1 &= LPDDR4__DENALI_PI_214__PI_WDQLVL_EN_F1_MASK;
> +
> + lpddr4_k3_readreg_pi(ddrss, LPDDR4__PI_WDQLVL_EN_F2__REG, ®s->wdqlvl_f2);
> + regs->wdqlvl_f2 &= LPDDR4__DENALI_PI_217__PI_WDQLVL_EN_F2_MASK;
> +
> + /* clear periodic WDQLVL for F0 */
> + lpddr4_k3_clr_pi(ddrss, LPDDR4__PI_WDQLVL_EN_F0__REG,
> + 0x2 << LPDDR4__DENALI_PI_212__PI_WDQLVL_EN_F0_SHIFT);
> +
> + /* clear periodic WDQLVL for F1 */
> + lpddr4_k3_clr_pi(ddrss, LPDDR4__PI_WDQLVL_EN_F1__REG,
> + 0x2 << LPDDR4__DENALI_PI_214__PI_WDQLVL_EN_F1_SHIFT);
> +
> + /* clear periodic WDQLVL for F2 */
> + lpddr4_k3_clr_pi(ddrss, LPDDR4__PI_WDQLVL_EN_F2__REG,
> + 0x2 << LPDDR4__DENALI_PI_217__PI_WDQLVL_EN_F2_SHIFT);
> +
> +#define PLL_CTRL_OFF 0x20
> +#define PLL_CFG 0x00680000
> + switch (ddrss->instance) {
> + case 0:
> + pll_ctrl = PLL_CFG + 12 * 0x1000 + PLL_CTRL_OFF;
> + break;
> + case 1:
> + pll_ctrl = PLL_CFG + 26 * 0x1000 + PLL_CTRL_OFF;
> + break;
> + case 2:
> + pll_ctrl = PLL_CFG + 27 * 0x1000 + PLL_CTRL_OFF;
> + break;
> + case 3:
> + pll_ctrl = PLL_CFG + 28 * 0x1000 + PLL_CTRL_OFF;
> + break;
> + }
Can we use the clock framework clk-k3-pll.c and/or clk-k3.c to set up these PLLs
instead of hardcoding this here?
> +
> + *(unsigned int *)pll_ctrl |= 0x80000000;
> + val = *(volatile unsigned int *)pll_ctrl;
> + if ((val & 0x80000000) != 0x80000000)
> + val = *(volatile unsigned int *)pll_ctrl;
Please use proper I/O functions (readl, writel). But priority would be
completely move this clocking related code to use our clock drivers as mentioned
above.
> +}
> +
> +void k3_ddrss_lpddr4_change_freq(struct udevice *dev)
I don't understand what this function is supposed to be doing in addition to
what k3_lpddr3_freq_update does, the name can be changed to make it clearer if
this sequence is specific for LPM or something.
> +{
> + struct k3_ddrss_desc *ddrss = dev_get_priv(dev);
> + u32 regval;
> + unsigned long tmo;
> +
> + /* PI_START=1 */
> + lpddr4_k3_set_pi(ddrss, LPDDR4__PI_START__REG, 0x01);
> + /* START=1 */
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__START__REG, 0x01);
> +
> + k3_lpddr4_freq_update(ddrss);
> +
> + tmo = timer_get_us() + 100000;
> + do {
> + lpddr4_k3_readreg_pi(ddrss, LPDDR4__PI_INT_STATUS__REG, ®val);
> + if (timer_get_us() > tmo) {
> + printf("%s:%d timeout error\n", __func__, __LINE__);
dev_err instead of printf in all these failure conditions
> + hang();
> + }
> + } while ((regval & (1 << 0)) == 0x00);
> +
> + tmo = timer_get_us() + 4000;
Can use wait_for_* functions for polling with timeout.
> + do {
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__INT_STATUS_0__REG, ®val);
> + if (timer_get_us() > tmo) {
> + printf("%s:%d timeout error\n", __func__, __LINE__);
> + hang();
> + }
> + } while ((regval & (1 << 9)) == 0x00);
> +
> + lpddr4_k3_readreg_pi(ddrss, LPDDR4__PI_INT_STATUS__REG, ®val);
> + debug("%s: PI interrupt status: 0x%08x\n", __func__, regval);
> +
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__INT_STATUS_0__REG, ®val);
> + debug("%s: Controller interrupt status: 0x%08x\n", __func__, regval);
> +
> + debug("%s: Successfully exited Retention\n", __func__);
> +}
> +
> +void k3_ddrss_lpddr4_exit_low_power(struct udevice *dev,
> + struct k3_ddrss_regs *regs)
> +{
> + struct k3_ddrss_desc *ddrss = dev_get_priv(dev);
> + u32 regval, fspop, fspwr;
> + unsigned long tmo;
> +
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__LP_STATE_CS0__REG, ®val);
> + debug("%s: LP State: 0x%08x\n", __func__, regval);
> +
> + /* make sure that LP flag is clear before going through this process */
> + lpddr4_k3_writereg_ctl(ddrss, LPDDR4__INT_ACK_0__REG, (0x1 << 10));
> +
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__CKSRX_F1__REG, ®val);
> + regval &= ~(0x7F << 24);
> + regval |= (0x2 << 24); // set low power mode exit
> + lpddr4_k3_writereg_ctl(ddrss, LPDDR4__CKSRX_F1__REG, regval);
> +
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__LP_STATE_CS0__REG, ®val);
> + debug("%s: LP State: 0x%08x\n", __func__, regval);
> +
> + /* wait until low power operation has been completed */
> + tmo = timer_get_us() + 4000;
> + do {
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__INT_STATUS_0__REG, ®val);
> + if (timer_get_us() > tmo) {
> + printf("%s:%d timeout error\n", __func__, __LINE__);
> + hang();
> + }
> + } while ((regval & (0x1 << 10)) == 0);
> +
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__LP_STATE_CS0__REG, ®val);
> + debug("%s: LP State: 0x%08x\n", __func__, regval);
> +
> + lpddr4_k3_writereg_ctl(ddrss, LPDDR4__INT_ACK_0__REG, (0x1 << 10));
> +
> + /*
> + * bit 6 / 14 -- lp_state valid
> + * bits 13:8 / 5:0 0x0F SRPD Long with Mem and Controller Clk Gating
> + */
> + tmo = timer_get_us() + 4000;
> + do {
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__LP_STATE_CS0__REG, ®val);
> + if (timer_get_us() > tmo) {
> + printf("%s:%d timeout error\n", __func__, __LINE__);
> + hang();
> + }
> + } while ((regval & 0x4F4F) != 0x4040);
> +
> + lpddr4_k3_readreg_ctl(ddrss, LPDDR4__LP_STATE_CS0__REG, ®val);
> + debug("%s: LP State: 0x%08x\n", __func__, regval);
> +
> + /*
> + * MR13 data within the PI is based upon CS but NOT based upon
> + * frequency set point.
> + * MR13 is the current MR13 value
> + */
> + lpddr4_k3_readreg_pi(ddrss, LPDDR4__PI_MR13_DATA_0__REG, ®val);
> + fspop = (regval & ((u32)1 << 31)) >> 31;
> + fspwr = (regval & ((u32)1 << 30)) >> 30;
> +
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__FSP_OP_CURRENT__REG,
> + fspop << LPDDR4__DENALI_CTL_192__FSP_OP_CURRENT_SHIFT);
> +
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__FSP_WR_CURRENT__REG,
> + fspwr << LPDDR4__DENALI_CTL_192__FSP_WR_CURRENT_SHIFT);
> +
> + // do not allow CTL to update MR
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__FSP_PHY_UPDATE_MRW__REG,
> + 1 << LPDDR4__DENALI_CTL_191__FSP_PHY_UPDATE_MRW_SHIFT);
> +
> + // do not allow PI to update MR
> + lpddr4_k3_clr_pi(ddrss, DENALI_PI_64, 1 << 0);
> +
> + // PI_FREQ_MAP defines supported working frequencies
> + lpddr4_k3_readreg_pi(ddrss, LPDDR4__PI_FREQ_MAP__REG, ®val);
> + if (regval & (0x1 << 1)) {
> + // define FSP0 and FSP1 as trained
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__MR_FSP_DATA_VALID_F0__REG,
> + LPDDR4__DENALI_CTL_190__MR_FSP_DATA_VALID_F0_MASK);
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__MR_FSP_DATA_VALID_F1__REG,
> + LPDDR4__DENALI_CTL_190__MR_FSP_DATA_VALID_F1_MASK);
> + }
> + if (regval & (0x1 << 2)) {
> + // define FSP0 and FSP2 as trained
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__MR_FSP_DATA_VALID_F0__REG,
> + LPDDR4__DENALI_CTL_190__MR_FSP_DATA_VALID_F0_MASK);
> + lpddr4_k3_set_ctl(ddrss, LPDDR4__MR_FSP_DATA_VALID_F2__REG,
> + LPDDR4__DENALI_CTL_190__MR_FSP_DATA_VALID_F2_MASK);
> + }
> +
> + /*
> + * Restore registers
> + */
> + lpddr4_k3_writereg_ctl(ddrss, DENALI_CTL_141, regs->ctl_141);
> + lpddr4_k3_writereg_phy(ddrss, DENALI_PHY_1305, regs->phy_1305);
> + lpddr4_k3_writereg_ctl(ddrss, DENALI_CTL_88, regs->ctl_88);
> + lpddr4_k3_writereg_pi(ddrss, DENALI_PI_134, regs->pi_134);
> + // PI_139 cannot be restored
> + lpddr4_k3_writereg_pi(ddrss, DENALI_PI_7, regs->pi_7);
> + lpddr4_k3_writereg_ctl(ddrss, DENALI_CTL_20, regs->ctl_20);
> +
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_141, ®s->ctl_141);
> + lpddr4_k3_readreg_phy(ddrss, DENALI_PHY_1305, ®s->phy_1305);
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_88, ®s->ctl_88);
> + // PI_139 cannot be restored
> + lpddr4_k3_readreg_pi(ddrss, DENALI_PI_7, ®s->pi_7);
> +
> + lpddr4_k3_readreg_pi(ddrss, DENALI_PI_79, ®val);
> + lpddr4_k3_writereg_pi(ddrss, DENALI_PI_80, regval);
> +
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_293, ®val);
> + lpddr4_k3_writereg_ctl(ddrss, DENALI_CTL_295, regval);
> +
> + lpddr4_k3_readreg_ctl(ddrss, DENALI_CTL_294, ®val);
> + lpddr4_k3_writereg_ctl(ddrss, DENALI_CTL_296, regval);
> +
> + lpddr4_k3_set_pi(ddrss, DENALI_PI_214, regs->wdqlvl_f1);
> + lpddr4_k3_set_pi(ddrss, DENALI_PI_217, regs->wdqlvl_f2);
> +}
> +#endif /* CONFIG_K3_J721E_DDRSS */
> +
> void k3_lpddr4_probe(struct k3_ddrss_desc *ddrss)
> {
> u32 status = 0U;
> diff --git a/drivers/ram/k3-ddrss/lpddr4_k3_reg.h b/drivers/ram/k3-ddrss/lpddr4_k3_reg.h
> new file mode 100644
> index 00000000000..ba8e8b619fb
> --- /dev/null
> +++ b/drivers/ram/k3-ddrss/lpddr4_k3_reg.h
> @@ -0,0 +1,120 @@
> +/* SPDX-License-Identifier: BSD-3-Clause */
> +/*
> + * Copyright (C) 2026 Texas Instruments Incorporated - https://www.ti.com/
> + */
> +
> +#ifndef LPDDR4_K3_REG
> +#define LPDDR4_K3_REG
> +
> +#define lpddr4_k3_readreg_ctl(ddrss, reg, pt) do { \
> + u16 offset = 0U; \
> + u32 result = 0U; \
> + TH_OFFSET_FROM_REG(reg, CTL_SHIFT, offset); \
> + result = ddrss->driverdt->readctlconfig(&ddrss->pd, pt, (u16 *)(&offset), 1); \
> + if (result > 0U) { \
> + printf("%s: Failed to read %s\n", __func__, xstr(reg)); \
> + hang(); \
> + } \
> + } while (0)
> +
> +#define lpddr4_k3_readreg_pi(ddrss, reg, pt) do { \
> + u16 offset = 0U; \
> + u32 result = 0U; \
> + TH_OFFSET_FROM_REG(reg, PI_SHIFT, offset); \
> + result = ddrss->driverdt->readphyindepconfig(&ddrss->pd, pt, (u16 *)(&offset), 1); \
> + if (result > 0U) { \
> + printf("%s: Failed to read %s\n", __func__, xstr(reg)); \
> + hang(); \
> + } \
> + } while (0)
> +
> +#define lpddr4_k3_readreg_phy(ddrss, reg, pt) do { \
> + u16 offset = 0U; \
> + u32 result = 0U; \
> + TH_OFFSET_FROM_REG(reg, PHY_SHIFT, offset); \
> + result = ddrss->driverdt->readphyconfig(&ddrss->pd, pt, (u16 *)(&offset), 1); \
> + if (result > 0U) { \
> + printf("%s: Failed to read %s\n", __func__, xstr(reg)); \
> + hang(); \
> + } \
> + } while (0)
> +
> +#define lpddr4_k3_writereg_ctl(ddrss, reg, value) do { \
> + u16 offset = 0U; \
> + u32 result = 0U; \
> + u32 writeval = value; \
> + TH_OFFSET_FROM_REG(reg, CTL_SHIFT, offset); \
> + result = ddrss->driverdt->writectlconfig(&ddrss->pd, &writeval, (u16 *)(&offset), 1); \
> + if (result > 0U) { \
> + printf("%s: Failed to write %s\n", __func__, xstr(reg)); \
> + hang(); \
> + } \
> + } while (0)
> +
> +#define lpddr4_k3_writereg_pi(ddrss, reg, value) do { \
> + u16 offset = 0U; \
> + u32 result = 0U; \
> + u32 writeval = value; \
> + TH_OFFSET_FROM_REG(reg, PI_SHIFT, offset); \
> + result = ddrss->driverdt->writephyindepconfig(&ddrss->pd, &writeval, (u16 *)(&offset), 1); \
> + if (result > 0U) { \
> + printf("%s: Failed to write %s\n", __func__, xstr(reg)); \
> + hang(); \
> + } \
> + } while (0)
> +
> +#define lpddr4_k3_writereg_phy(ddrss, reg, value) do { \
> + u16 offset = 0U; \
> + u32 result = 0U; \
> + u32 writeval = value; \
> + TH_OFFSET_FROM_REG(reg, PHY_SHIFT, offset); \
> + result = ddrss->driverdt->writephyconfig(&ddrss->pd, &writeval, (u16 *)(&offset), 1); \
> + if (result > 0U) { \
> + printf("%s: Failed to write %s\n", __func__, xstr(reg)); \
> + hang(); \
> + } \
> + } while (0)
> +
> +#define lpddr4_k3_set_ctl(k3_ddrss, reg, mask) do { \
How was this working? The parameter says "k3_ddrss" but you are using "ddrss" in
the macro definition?
> + u32 val; \
> + lpddr4_k3_readreg_ctl(ddrss, reg, &val); \
> + val |= mask; \
> + lpddr4_k3_writereg_ctl(ddrss, reg, val); \
> + } while (0)
> +
> +#define lpddr4_k3_clr_ctl(k3_ddrss, reg, mask) do { \
> + u32 val; \
> + lpddr4_k3_readreg_ctl(ddrss, reg, &val); \
> + val &= ~(mask); \
> + lpddr4_k3_writereg_ctl(ddrss, reg, val); \
> + } while (0)
> +
> +#define lpddr4_k3_set_pi(k3_ddrss, reg, mask) do { \
> + u32 val; \
> + lpddr4_k3_readreg_pi(ddrss, reg, &val); \
> + val |= mask; \
> + lpddr4_k3_writereg_pi(ddrss, reg, val); \
> + } while (0)
> +
> +#define lpddr4_k3_clr_pi(k3_ddrss, reg, mask) do { \
> + u32 val; \
> + lpddr4_k3_readreg_pi(ddrss, reg, &val); \
> + val &= ~(mask); \
> + lpddr4_k3_writereg_pi(ddrss, reg, val); \
> + } while (0)
> +
> +#define lpddr4_k3_set_phy(ddrss, reg, mask) do { \
> + u32 val; \
> + lpddr4_k3_readreg_phy(ddrss, reg, &val); \
> + val |= mask; \
> + lpddr4_k3_writereg_phy(ddrss, reg, val); \
> + } while (0)
> +
> +#define lpddr4_k3_clr_phy(ddrss, reg, mask) do { \
> + u32 val; \
> + lpddr4_k3_readreg_phy(ddrss, reg, &val); \
> + val &= ~(mask); \
> + lpddr4_k3_writereg_phy(ddrss, reg, val); \
> + } while (0)
> +
> +#endif /* LPDDR4_K3_REG */
For all these functions I would prefer if you could move them into
"lpddr4_getinstance" (in lpddr4_obj_if.c) to have .setphy, .clrphy etc. as a
common place for all our IP read/write interfacing functions.
--
Thanking You
Neha Malcom Francis
More information about the U-Boot
mailing list