[v2,1/2] memory/mediatek: Add an interface to get current DDR data rate
From: Crystal Guo
Date: Thu Feb 06 2025 - 07:32:09 EST
Add MediaTek DRAMC driver to provide an interface that can
obtain current DDR data rate.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202412210955.FvO0Pee3-lkp@intel.
com/
Signed-off-by: Crystal Guo <crystal.guo@xxxxxxxxxxxx>
---
drivers/memory/Makefile | 2 +-
drivers/memory/mediatek/Kconfig | 6 +-
drivers/memory/mediatek/mtk-dramc.c | 415 +++++++++----------------
include/linux/soc/mediatek/mtk-dramc.h | 41 ---
4 files changed, 147 insertions(+), 317 deletions(-)
delete mode 100644 include/linux/soc/mediatek/mtk-dramc.h
diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile
index cf1091449d2e..c0facf529803 100644
--- a/drivers/memory/Makefile
+++ b/drivers/memory/Makefile
@@ -27,7 +27,7 @@ obj-$(CONFIG_STM32_FMC2_EBI) += stm32-fmc2-ebi.o
obj-$(CONFIG_SAMSUNG_MC) += samsung/
obj-$(CONFIG_TEGRA_MC) += tegra/
-obj-$(CONFIG_HAVE_MTK_MC) += mediatek/
+obj-$(CONFIG_MEDIATEK_MC) += mediatek/
obj-$(CONFIG_TI_EMIF_SRAM) += ti-emif-sram.o
obj-$(CONFIG_FPGA_DFL_EMIF) += dfl-emif.o
diff --git a/drivers/memory/mediatek/Kconfig b/drivers/memory/mediatek/Kconfig
index 00764cdb157e..3f238e0d9647 100644
--- a/drivers/memory/mediatek/Kconfig
+++ b/drivers/memory/mediatek/Kconfig
@@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
-config HAVE_MTK_MC
+config MEDIATEK_MC
bool "MediaTek Memory Controller support"
help
This option allows to enable MediaTek memory controller drivers,
@@ -7,11 +7,11 @@ config HAVE_MTK_MC
Select Y here if you need support for MediaTek memory controller.
If you don't need, select N.
-if HAVE_MTK_MC
+if MEDIATEK_MC
config MTK_DRAMC
tristate "MediaTek DRAMC driver"
- depends on HAVE_MTK_MC
+ default y
help
This option selects the MediaTek DRAMC driver, which provides
an interface for reporting the current data rate of DRAM.
diff --git a/drivers/memory/mediatek/mtk-dramc.c b/drivers/memory/mediatek/mtk-dramc.c
index 9c2c8e187a4a..d452483a98ce 100644
--- a/drivers/memory/mediatek/mtk-dramc.c
+++ b/drivers/memory/mediatek/mtk-dramc.c
@@ -1,260 +1,133 @@
// SPDX-License-Identifier: GPL-2.0
/*
- * Copyright (c) 2024 MediaTek Inc.
+ * Copyright (c) 2025 MediaTek Inc.
*/
-
+#include <linux/bitops.h>
+#include <linux/bitfield.h>
+#include <linux/device.h>
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
#include <linux/printk.h>
-#include <linux/io.h>
-#include <linux/soc/mediatek/mtk-dramc.h>
-
-static struct platform_device *dramc_pdev;
-static struct platform_driver dramc_drv;
-static int fmeter_init(struct platform_device *pdev,
- struct fmeter_dev_t *fmeter_dev_ptr, unsigned int fmeter_version)
+#define POSDIV_PURIFY BIT(2)
+#define PREDIV 7
+#define REF_FREQUENCY 26
+#define SHUFFLE_OFFSET 0x700
+
+/*--------------------------------------------------------------------------*/
+/* Register Offset */
+/*--------------------------------------------------------------------------*/
+#define DPHY_DVFS_STA 0x0e98
+#define APHY_PHYPLL2 0x0908
+#define APHY_CLRPLL2 0x0928
+#define APHY_PHYPLL3 0x090c
+#define APHY_CLRPLL3 0x092c
+#define APHY_PHYPLL4 0x0910
+#define APHY_ARPI0 0x0d94
+#define APHY_CA_ARDLL1 0x0d08
+#define APHY_B0_TX0 0x0dc4
+
+/*--------------------------------------------------------------------------*/
+/* Register Mask */
+/*--------------------------------------------------------------------------*/
+#define DPHY_DVFS_SHU_LV GENMASK(15, 14)
+#define DPHY_DVFS_PLL_SEL GENMASK(25, 25)
+#define APHY_PLL2_SDMPCW GENMASK(18, 3)
+#define APHY_PLL3_POSDIV GENMASK(13, 11)
+#define APHY_PLL4_FBKSEL GENMASK(6, 6)
+#define APHY_ARPI0_SOPEN GENMASK(26, 26)
+#define APHY_ARDLL1_CK_EN GENMASK(0, 0)
+#define APHY_B0_TX0_SER_MODE GENMASK(4, 3)
+
+static unsigned int read_reg_field(void __iomem *base, unsigned int offset, unsigned int mask)
{
- struct device_node *dramc_node = pdev->dev.of_node;
- int ret;
+ unsigned int val = readl(base + offset);
+ unsigned int shift = __ffs(mask);
- ret = of_property_read_u32(dramc_node,
- "crystal-freq", &(fmeter_dev_ptr->crystal_freq));
- ret |= of_property_read_u32(dramc_node,
- "shu-of", &(fmeter_dev_ptr->shu_of));
- ret |= of_property_read_u32_array(dramc_node,
- "shu-lv", (unsigned int *)&(fmeter_dev_ptr->shu_lv), 3);
- ret |= of_property_read_u32_array(dramc_node,
- "pll-id", (unsigned int *)&(fmeter_dev_ptr->pll_id), 3);
- ret |= of_property_read_u32_array(dramc_node,
- "sdmpcw", (unsigned int *)(fmeter_dev_ptr->sdmpcw), 6);
- ret |= of_property_read_u32_array(dramc_node,
- "posdiv", (unsigned int *)(fmeter_dev_ptr->posdiv), 6);
- ret |= of_property_read_u32_array(dramc_node,
- "fbksel", (unsigned int *)(fmeter_dev_ptr->fbksel), 6);
- ret |= of_property_read_u32_array(dramc_node,
- "dqsopen", (unsigned int *)(fmeter_dev_ptr->dqsopen), 6);
- if (fmeter_version == 1) {
- fmeter_dev_ptr->version = 1;
- ret |= of_property_read_u32_array(dramc_node,
- "async-ca", (unsigned int *)(fmeter_dev_ptr->async_ca), 6);
- ret |= of_property_read_u32_array(dramc_node,
- "dq-ser-mode", (unsigned int *)(fmeter_dev_ptr->dq_ser_mode), 6);
- }
- return ret;
+ return (val & mask) >> shift;
}
-static ssize_t dram_data_rate_show(struct device_driver *driver, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "DRAM data rate = %d\n",
- mtk_dramc_get_data_rate());
-}
+struct mtk_dramc_pdata {
+ unsigned int fmeter_version;
+};
-static DRIVER_ATTR_RO(dram_data_rate);
+struct mtk_dramc_dev_t {
+ void __iomem *anaphy_base;
+ void __iomem *ddrphy_base;
+ const struct mtk_dramc_pdata *pdata;
+};
-static int dramc_probe(struct platform_device *pdev)
+static int mtk_dramc_probe(struct platform_device *pdev)
{
- struct device_node *dramc_node = pdev->dev.of_node;
- struct dramc_dev_t *dramc_dev_ptr;
- unsigned int fmeter_version;
- struct resource *res;
- unsigned int i, size;
+ struct mtk_dramc_dev_t *dramc;
+ const struct mtk_dramc_pdata *pdata;
int ret;
- pr_info("%s: module probe.\n", __func__);
- dramc_pdev = pdev;
- dramc_dev_ptr = devm_kmalloc(&pdev->dev,
- sizeof(struct dramc_dev_t), GFP_KERNEL);
+ dramc = devm_kzalloc(&pdev->dev, sizeof(struct mtk_dramc_dev_t), GFP_KERNEL);
+ if (!dramc)
+ return dev_err_probe(&pdev->dev, -ENOMEM, "Failed to allocate memory\n");
- if (!dramc_dev_ptr)
- return -ENOMEM;
+ pdata = of_device_get_match_data(&pdev->dev);
+ if (!pdata)
+ return dev_err_probe(&pdev->dev, -EINVAL, "No platform data available\n");
- ret = of_property_read_u32(dramc_node,
- "support-ch-cnt", &dramc_dev_ptr->support_ch_cnt);
- if (ret) {
- pr_info("%s: get support_ch_cnt fail\n", __func__);
- return -EINVAL;
- }
+ dramc->pdata = pdata;
- dramc_dev_ptr->sleep_base = of_iomap(dramc_node,
- dramc_dev_ptr->support_ch_cnt * 4);
- if (IS_ERR(dramc_dev_ptr->sleep_base)) {
- pr_info("%s: unable to map sleep base\n", __func__);
- return -EINVAL;
- }
-
- size = sizeof(phys_addr_t) * dramc_dev_ptr->support_ch_cnt;
- dramc_dev_ptr->dramc_chn_base_ao = devm_kmalloc(&pdev->dev,
- size, GFP_KERNEL);
- if (!(dramc_dev_ptr->dramc_chn_base_ao))
- return -ENOMEM;
- dramc_dev_ptr->dramc_chn_base_nao = devm_kmalloc(&pdev->dev,
- size, GFP_KERNEL);
- if (!(dramc_dev_ptr->dramc_chn_base_nao))
- return -ENOMEM;
- dramc_dev_ptr->ddrphy_chn_base_ao = devm_kmalloc(&pdev->dev,
- size, GFP_KERNEL);
- if (!(dramc_dev_ptr->ddrphy_chn_base_ao))
- return -ENOMEM;
- dramc_dev_ptr->ddrphy_chn_base_nao = devm_kmalloc(&pdev->dev,
- size, GFP_KERNEL);
- if (!(dramc_dev_ptr->ddrphy_chn_base_nao))
- return -ENOMEM;
-
- for (i = 0; i < dramc_dev_ptr->support_ch_cnt; i++) {
- res = platform_get_resource(pdev, IORESOURCE_MEM, i);
- dramc_dev_ptr->dramc_chn_base_ao[i] =
- devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dramc_dev_ptr->dramc_chn_base_ao[i])) {
- pr_info("%s: unable to map ch%d DRAMC AO base\n",
- __func__, i);
- return -EINVAL;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- i + dramc_dev_ptr->support_ch_cnt);
- dramc_dev_ptr->dramc_chn_base_nao[i] =
- devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dramc_dev_ptr->dramc_chn_base_nao[i])) {
- pr_info("%s: unable to map ch%d DRAMC NAO base\n",
- __func__, i);
- return -EINVAL;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- i + dramc_dev_ptr->support_ch_cnt * 2);
- dramc_dev_ptr->ddrphy_chn_base_ao[i] =
- devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dramc_dev_ptr->ddrphy_chn_base_ao[i])) {
- pr_info("%s: unable to map ch%d DDRPHY AO base\n",
- __func__, i);
- return -EINVAL;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM,
- i + dramc_dev_ptr->support_ch_cnt * 3);
- dramc_dev_ptr->ddrphy_chn_base_nao[i] =
- devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(dramc_dev_ptr->ddrphy_chn_base_nao[i])) {
- pr_info("%s: unable to map ch%d DDRPHY NAO base\n",
- __func__, i);
- return -EINVAL;
- }
+ dramc->anaphy_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dramc->anaphy_base)) {
+ ret = PTR_ERR(dramc->anaphy_base);
+ return dev_err_probe(&pdev->dev, ret, "Unable to map DDRPHY NAO base\n");
}
- ret = of_property_read_u32(dramc_node, "fmeter-version", &fmeter_version);
- if (ret) {
- pr_info("%s: get fmeter_version fail\n", __func__);
- return -EINVAL;
- }
- pr_info("%s: fmeter_version(%d)\n", __func__, fmeter_version);
-
- if (fmeter_version == 1) {
- dramc_dev_ptr->fmeter_dev_ptr = devm_kmalloc(&pdev->dev,
- sizeof(struct fmeter_dev_t),
- GFP_KERNEL);
- if (!(dramc_dev_ptr->fmeter_dev_ptr)) {
- pr_info("%s: memory alloc fail\n", __func__);
- return -ENOMEM;
- }
- ret = fmeter_init(pdev, dramc_dev_ptr->fmeter_dev_ptr, fmeter_version);
- if (ret) {
- pr_info("%s: fmeter_init fail\n", __func__);
- return -EINVAL;
- }
- } else {
- dramc_dev_ptr->fmeter_dev_ptr = NULL;
+ dramc->ddrphy_base = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(dramc->ddrphy_base)) {
+ ret = PTR_ERR(dramc->ddrphy_base);
+ return dev_err_probe(&pdev->dev, ret, "Unable to map DDRPHY AO base\n");
}
- ret = driver_create_file(pdev->dev.driver, &driver_attr_dram_data_rate);
- if (ret) {
- pr_info("%s: fail to create dram_data_rate sysfs\n", __func__);
- return ret;
- }
-
- platform_set_drvdata(pdev, dramc_dev_ptr);
- pr_info("%s: DRAM data rate = %d\n", __func__,
- mtk_dramc_get_data_rate());
- return ret;
+ platform_set_drvdata(pdev, dramc);
+ return 0;
}
-static unsigned int fmeter_v1(struct dramc_dev_t *dramc_dev_ptr)
+static unsigned int mtk_fmeter_v1(struct mtk_dramc_dev_t *dramc)
{
- struct fmeter_dev_t *fmeter_dev_ptr =
- (struct fmeter_dev_t *)dramc_dev_ptr->fmeter_dev_ptr;
- unsigned int shu_lv_val;
- unsigned int pll_id_val;
- unsigned int sdmpcw_val;
- unsigned int posdiv_val;
- unsigned int ckdiv4_val;
- unsigned int offset;
- unsigned int vco_freq;
- unsigned int fbksel;
- unsigned int dqsopen;
- unsigned int async_ca;
- unsigned int dq_ser_mode;
-
- shu_lv_val = (readl(dramc_dev_ptr->ddrphy_chn_base_ao[0] +
- fmeter_dev_ptr->shu_lv.offset) &
- fmeter_dev_ptr->shu_lv.mask) >>
- fmeter_dev_ptr->shu_lv.shift;
-
- pll_id_val = (readl(dramc_dev_ptr->ddrphy_chn_base_ao[0] +
- fmeter_dev_ptr->pll_id.offset) &
- fmeter_dev_ptr->pll_id.mask) >>
- fmeter_dev_ptr->pll_id.shift;
-
- offset = fmeter_dev_ptr->sdmpcw[pll_id_val].offset +
- fmeter_dev_ptr->shu_of * shu_lv_val;
- sdmpcw_val = (readl(dramc_dev_ptr->ddrphy_chn_base_nao[0] + offset) &
- fmeter_dev_ptr->sdmpcw[pll_id_val].mask) >>
- fmeter_dev_ptr->sdmpcw[pll_id_val].shift;
-
- offset = fmeter_dev_ptr->posdiv[pll_id_val].offset +
- fmeter_dev_ptr->shu_of * shu_lv_val;
- posdiv_val = (readl(dramc_dev_ptr->ddrphy_chn_base_nao[0] + offset) &
- fmeter_dev_ptr->posdiv[pll_id_val].mask) >>
- fmeter_dev_ptr->posdiv[pll_id_val].shift;
-
- offset = fmeter_dev_ptr->fbksel[pll_id_val].offset +
- fmeter_dev_ptr->shu_of * shu_lv_val;
- fbksel = (readl(dramc_dev_ptr->ddrphy_chn_base_nao[0] + offset) &
- fmeter_dev_ptr->fbksel[pll_id_val].mask) >>
- fmeter_dev_ptr->fbksel[pll_id_val].shift;
-
- offset = fmeter_dev_ptr->dqsopen[pll_id_val].offset +
- fmeter_dev_ptr->shu_of * shu_lv_val;
- dqsopen = (readl(dramc_dev_ptr->ddrphy_chn_base_nao[0] + offset) &
- fmeter_dev_ptr->dqsopen[pll_id_val].mask) >>
- fmeter_dev_ptr->dqsopen[pll_id_val].shift;
-
- offset = fmeter_dev_ptr->async_ca[pll_id_val].offset +
- fmeter_dev_ptr->shu_of * shu_lv_val;
- async_ca = (readl(dramc_dev_ptr->ddrphy_chn_base_nao[0] + offset) &
- fmeter_dev_ptr->async_ca[pll_id_val].mask) >>
- fmeter_dev_ptr->async_ca[pll_id_val].shift;
-
- offset = fmeter_dev_ptr->dq_ser_mode[pll_id_val].offset +
- fmeter_dev_ptr->shu_of * shu_lv_val;
- dq_ser_mode = (readl(dramc_dev_ptr->ddrphy_chn_base_nao[0] + offset) &
- fmeter_dev_ptr->dq_ser_mode[pll_id_val].mask) >>
- fmeter_dev_ptr->dq_ser_mode[pll_id_val].shift;
- ckdiv4_val = (dq_ser_mode == 1); // 1: DIV4, 2: DIV8, 3: DIV16
-
- posdiv_val &= ~(0x4);
-
- vco_freq = ((fmeter_dev_ptr->crystal_freq) *
- (sdmpcw_val >> 7)) >> posdiv_val >> 1 >> ckdiv4_val
- << fbksel;
-
- if ((dqsopen == 1) && (async_ca == 1))
- vco_freq >>= 1;
-
- return vco_freq;
+ unsigned int shu_level, pll_sel, offset;
+ unsigned int sdmpcw, posdiv, ckdiv4, fbksel, sopen, async_ca, ser_mode;
+ unsigned int perdiv_freq, posdiv_freq, vco_freq;
+ unsigned int final_rate;
+
+ shu_level = read_reg_field(dramc->ddrphy_base, DPHY_DVFS_STA, DPHY_DVFS_SHU_LV);
+ pll_sel = read_reg_field(dramc->ddrphy_base, DPHY_DVFS_STA, DPHY_DVFS_PLL_SEL);
+ offset = SHUFFLE_OFFSET * shu_level;
+
+ sdmpcw = read_reg_field(dramc->anaphy_base,
+ ((pll_sel == 0) ? APHY_PHYPLL2 : APHY_CLRPLL2) + offset,
+ APHY_PLL2_SDMPCW);
+ posdiv = read_reg_field(dramc->anaphy_base,
+ ((pll_sel == 0) ? APHY_PHYPLL3 : APHY_CLRPLL3) + offset,
+ APHY_PLL3_POSDIV);
+ fbksel = read_reg_field(dramc->anaphy_base, APHY_PHYPLL4 + offset, APHY_PLL4_FBKSEL);
+ sopen = read_reg_field(dramc->anaphy_base, APHY_ARPI0 + offset, APHY_ARPI0_SOPEN);
+ async_ca = read_reg_field(dramc->anaphy_base, APHY_CA_ARDLL1 + offset, APHY_ARDLL1_CK_EN);
+ ser_mode = read_reg_field(dramc->anaphy_base, APHY_B0_TX0 + offset, APHY_B0_TX0_SER_MODE);
+
+ ckdiv4 = (ser_mode == 1) ? 1 : 0;
+ posdiv &= ~(POSDIV_PURIFY);
+
+ perdiv_freq = REF_FREQUENCY * (sdmpcw >> PREDIV);
+ posdiv_freq = (perdiv_freq >> posdiv) >> 1;
+ vco_freq = posdiv_freq << fbksel;
+ final_rate = vco_freq >> ckdiv4;
+
+ if (sopen == 1 && async_ca == 1)
+ final_rate >>= 1;
+
+ return final_rate;
}
/*
@@ -262,64 +135,62 @@ static unsigned int fmeter_v1(struct dramc_dev_t *dramc_dev_ptr)
*
* Returns DRAM data rate (MB/s)
*/
-unsigned int mtk_dramc_get_data_rate(void)
+static unsigned int mtk_dramc_get_data_rate(struct device *dev)
{
- struct dramc_dev_t *dramc_dev_ptr;
- struct fmeter_dev_t *fmeter_dev_ptr;
+ struct mtk_dramc_dev_t *dramc_dev = dev_get_drvdata(dev);
- if (!dramc_pdev)
- return 0;
-
- dramc_dev_ptr =
- (struct dramc_dev_t *)platform_get_drvdata(dramc_pdev);
+ if (!dramc_dev) {
+ dev_err(dev, "DRAMC device data not found\n");
+ return -EINVAL;
+ }
- fmeter_dev_ptr = (struct fmeter_dev_t *)dramc_dev_ptr->fmeter_dev_ptr;
- if (!fmeter_dev_ptr)
- return 0;
+ if (dramc_dev->pdata) {
+ if (dramc_dev->pdata->fmeter_version == 1)
+ return mtk_fmeter_v1(dramc_dev);
- if (fmeter_dev_ptr->version == 1)
- return fmeter_v1(dramc_dev_ptr);
- return 0;
+ dev_err(dev, "Unsupported fmeter version\n");
+ return -EINVAL;
+ }
+ dev_err(dev, "DRAMC platform data not found\n");
+ return -EINVAL;
}
-EXPORT_SYMBOL(mtk_dramc_get_data_rate);
-static int dramc_remove(struct platform_device *pdev)
+static ssize_t dram_data_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- dramc_pdev = NULL;
-
- return 0;
+ return snprintf(buf, PAGE_SIZE, "DRAM data rate = %u\n",
+ mtk_dramc_get_data_rate(dev));
}
-static const struct of_device_id dramc_of_ids[] = {
- {.compatible = "mediatek,common-dramc",},
+static DEVICE_ATTR_RO(dram_data_rate);
+
+static struct attribute *mtk_dramc_attrs[] = {
+ &dev_attr_dram_data_rate.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(mtk_dramc);
+
+static const struct mtk_dramc_pdata dramc_pdata_mt8196 = {
+ .fmeter_version = 1
+};
+
+static const struct of_device_id mtk_dramc_of_ids[] = {
+ { .compatible = "mediatek,mt8196-dramc", .data = &dramc_pdata_mt8196 },
{}
};
+MODULE_DEVICE_TABLE(of, mtk_dramc_of_ids);
-static struct platform_driver dramc_drv = {
- .probe = dramc_probe,
- .remove = dramc_remove,
+static struct platform_driver mtk_dramc_driver = {
+ .probe = mtk_dramc_probe,
.driver = {
- .name = "dramc_drv",
- .owner = THIS_MODULE,
- .of_match_table = dramc_of_ids,
+ .name = "mtk_dramc_drv",
+ .of_match_table = mtk_dramc_of_ids,
+ .dev_groups = mtk_dramc_groups,
},
};
-static int __init dramc_drv_init(void)
-{
- int ret;
-
- ret = platform_driver_register(&dramc_drv);
- if (ret) {
- pr_info("%s: init fail, ret 0x%x\n", __func__, ret);
- return ret;
- }
-
- return ret;
-}
-
-module_init(dramc_drv_init);
+module_platform_driver(mtk_dramc_driver);
-MODULE_AUTHOR("Mediatek Corporation");
-MODULE_DESCRIPTION("MediaTek DRAMC Driver");
+MODULE_AUTHOR("Crystal Guo <crystal.guo@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("MediaTek DRAM Controller Driver");
MODULE_LICENSE("GPL");
diff --git a/include/linux/soc/mediatek/mtk-dramc.h b/include/linux/soc/mediatek/mtk-dramc.h
deleted file mode 100644
index 95e7dbfe7d0e..000000000000
--- a/include/linux/soc/mediatek/mtk-dramc.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (c) 2019 MediaTek Inc.
- */
-
-#ifndef __MTK_DRAMC_H__
-#define __MTK_DRAMC_H__
-
-struct reg_ctrl_t {
- unsigned int offset;
- unsigned int mask;
- unsigned int shift;
-};
-
-struct fmeter_dev_t {
- unsigned int version;
- unsigned int crystal_freq;
- unsigned int shu_of;
- struct reg_ctrl_t shu_lv;
- struct reg_ctrl_t pll_id;
- struct reg_ctrl_t sdmpcw[2];
- struct reg_ctrl_t posdiv[2];
- struct reg_ctrl_t fbksel[2];
- struct reg_ctrl_t dqsopen[2];
- struct reg_ctrl_t async_ca[2];
- struct reg_ctrl_t dq_ser_mode[2];
-};
-
-struct dramc_dev_t {
- unsigned int support_ch_cnt;
- void __iomem **dramc_chn_base_ao;
- void __iomem **dramc_chn_base_nao;
- void __iomem **ddrphy_chn_base_ao;
- void __iomem **ddrphy_chn_base_nao;
- void __iomem *sleep_base;
- void *fmeter_dev_ptr;
-};
-
-unsigned int mtk_dramc_get_data_rate(void);
-
-#endif /* __MTK_DRAMC_H__ */
--
2.18.0