@@ -18,3 +18,13 @@ config ROCKCHIP_IODOMAIN
Say y here to enable support io domains on Rockchip SoCs. It is
necessary for the io domain setting of the SoC to match the
voltage supplied by the regulators.
+
+config MTK_SVS
+ bool "MediaTek Smart Voltage Scaling(SVS)"
+ depends on POWER_AVS && MTK_EFUSE
+ help
+ The SVS engine is a piece of hardware which is used to calculate
+ optimized voltage values of several power domains, e.g.
+ CPU clusters/GPU/CCI, according to chip process corner, temperatures,
+ and other factors. Then DVFS driver could apply those optimized voltage
+ values to reduce power consumption.
@@ -1,2 +1,3 @@
obj-$(CONFIG_POWER_AVS_OMAP) += smartreflex.o
obj-$(CONFIG_ROCKCHIP_IODOMAIN) += rockchip-io-domain.o
+obj-$(CONFIG_MTK_SVS) += mtk_svs.o
new file mode 100644
@@ -0,0 +1,2084 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 MediaTek Inc.
+ */
+
+#define pr_fmt(fmt) "[mtk_svs] " fmt
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_opp.h>
+#include <linux/pm_qos.h>
+#include <linux/pm_runtime.h>
+#include <linux/power/mtk_svs.h>
+#include <linux/proc_fs.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spinlock.h>
+#include <linux/thermal.h>
+#include <linux/uaccess.h>
+
+#define SVS_INIT01_VOLT_IGNORE 1
+#define SVS_INIT01_VOLT_INC_ONLY 2
+
+#define SVS_PHASE_INIT01 0
+#define SVS_PHASE_INIT02 1
+#define SVS_PHASE_MON 2
+#define SVS_PHASE_ERROR 3
+
+#define SVS_CPU_LITTLE 1
+#define SVS_CPU_BIG 2
+#define SVS_CCI 3
+#define SVS_GPU 4
+
+#define proc_fops_rw(name) \
+ static int name ## _proc_open(struct inode *inode, \
+ struct file *file) \
+ { \
+ return single_open(file, name ## _proc_show, \
+ PDE_DATA(inode)); \
+ } \
+ static const struct file_operations name ## _proc_fops = { \
+ .owner = THIS_MODULE, \
+ .open = name ## _proc_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+ .write = name ## _proc_write, \
+ }
+
+#define proc_fops_ro(name) \
+ static int name ## _proc_open(struct inode *inode, \
+ struct file *file) \
+ { \
+ return single_open(file, name ## _proc_show, \
+ PDE_DATA(inode)); \
+ } \
+ static const struct file_operations name ## _proc_fops = { \
+ .owner = THIS_MODULE, \
+ .open = name ## _proc_open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+ }
+
+#define proc_entry(name) {__stringify(name), &name ## _proc_fops}
+
+static DEFINE_SPINLOCK(mtk_svs_lock);
+struct mtk_svs;
+
+enum reg_index {
+ TEMPMONCTL0 = 0,
+ TEMPMONCTL1,
+ TEMPMONCTL2,
+ TEMPMONINT,
+ TEMPMONINTSTS,
+ TEMPMONIDET0,
+ TEMPMONIDET1,
+ TEMPMONIDET2,
+ TEMPH2NTHRE,
+ TEMPHTHRE,
+ TEMPCTHRE,
+ TEMPOFFSETH,
+ TEMPOFFSETL,
+ TEMPMSRCTL0,
+ TEMPMSRCTL1,
+ TEMPAHBPOLL,
+ TEMPAHBTO,
+ TEMPADCPNP0,
+ TEMPADCPNP1,
+ TEMPADCPNP2,
+ TEMPADCMUX,
+ TEMPADCEXT,
+ TEMPADCEXT1,
+ TEMPADCEN,
+ TEMPPNPMUXADDR,
+ TEMPADCMUXADDR,
+ TEMPADCEXTADDR,
+ TEMPADCEXT1ADDR,
+ TEMPADCENADDR,
+ TEMPADCVALIDADDR,
+ TEMPADCVOLTADDR,
+ TEMPRDCTRL,
+ TEMPADCVALIDMASK,
+ TEMPADCVOLTAGESHIFT,
+ TEMPADCWRITECTRL,
+ TEMPMSR0,
+ TEMPMSR1,
+ TEMPMSR2,
+ TEMPADCHADDR,
+ TEMPIMMD0,
+ TEMPIMMD1,
+ TEMPIMMD2,
+ TEMPMONIDET3,
+ TEMPADCPNP3,
+ TEMPMSR3,
+ TEMPIMMD3,
+ TEMPPROTCTL,
+ TEMPPROTTA,
+ TEMPPROTTB,
+ TEMPPROTTC,
+ TEMPSPARE0,
+ TEMPSPARE1,
+ TEMPSPARE2,
+ TEMPSPARE3,
+ TEMPMSR0_1,
+ TEMPMSR1_1,
+ TEMPMSR2_1,
+ TEMPMSR3_1,
+ DESCHAR,
+ TEMPCHAR,
+ DETCHAR,
+ AGECHAR,
+ DCCONFIG,
+ AGECONFIG,
+ FREQPCT30,
+ FREQPCT74,
+ LIMITVALS,
+ VBOOT,
+ DETWINDOW,
+ CONFIG,
+ TSCALCS,
+ RUNCONFIG,
+ SVSEN,
+ INIT2VALS,
+ DCVALUES,
+ AGEVALUES,
+ VOP30,
+ VOP74,
+ TEMP,
+ INTSTS,
+ INTSTSRAW,
+ INTEN,
+ CHKINT,
+ CHKSHIFT,
+ STATUS,
+ VDESIGN30,
+ VDESIGN74,
+ DVT30,
+ DVT74,
+ AGECOUNT,
+ SMSTATE0,
+ SMSTATE1,
+ CTL0,
+ DESDETSEC,
+ TEMPAGESEC,
+ CTRLSPARE0,
+ CTRLSPARE1,
+ CTRLSPARE2,
+ CTRLSPARE3,
+ CORESEL,
+ THERMINTST,
+ INTST,
+ THSTAGE0ST,
+ THSTAGE1ST,
+ THSTAGE2ST,
+ THAHBST0,
+ THAHBST1,
+ SPARE0,
+ SPARE1,
+ SPARE2,
+ SPARE3,
+ THSLPEVEB,
+ reg_num,
+};
+
+static const u32 svs_regs_v2[] = {
+ [TEMPMONCTL0] = 0x000,
+ [TEMPMONCTL1] = 0x004,
+ [TEMPMONCTL2] = 0x008,
+ [TEMPMONINT] = 0x00c,
+ [TEMPMONINTSTS] = 0x010,
+ [TEMPMONIDET0] = 0x014,
+ [TEMPMONIDET1] = 0x018,
+ [TEMPMONIDET2] = 0x01c,
+ [TEMPH2NTHRE] = 0x024,
+ [TEMPHTHRE] = 0x028,
+ [TEMPCTHRE] = 0x02c,
+ [TEMPOFFSETH] = 0x030,
+ [TEMPOFFSETL] = 0x034,
+ [TEMPMSRCTL0] = 0x038,
+ [TEMPMSRCTL1] = 0x03c,
+ [TEMPAHBPOLL] = 0x040,
+ [TEMPAHBTO] = 0x044,
+ [TEMPADCPNP0] = 0x048,
+ [TEMPADCPNP1] = 0x04c,
+ [TEMPADCPNP2] = 0x050,
+ [TEMPADCMUX] = 0x054,
+ [TEMPADCEXT] = 0x058,
+ [TEMPADCEXT1] = 0x05c,
+ [TEMPADCEN] = 0x060,
+ [TEMPPNPMUXADDR] = 0x064,
+ [TEMPADCMUXADDR] = 0x068,
+ [TEMPADCEXTADDR] = 0x06c,
+ [TEMPADCEXT1ADDR] = 0x070,
+ [TEMPADCENADDR] = 0x074,
+ [TEMPADCVALIDADDR] = 0x078,
+ [TEMPADCVOLTADDR] = 0x07c,
+ [TEMPRDCTRL] = 0x080,
+ [TEMPADCVALIDMASK] = 0x084,
+ [TEMPADCVOLTAGESHIFT] = 0x088,
+ [TEMPADCWRITECTRL] = 0x08c,
+ [TEMPMSR0] = 0x090,
+ [TEMPMSR1] = 0x094,
+ [TEMPMSR2] = 0x098,
+ [TEMPADCHADDR] = 0x09c,
+ [TEMPIMMD0] = 0x0a0,
+ [TEMPIMMD1] = 0x0a4,
+ [TEMPIMMD2] = 0x0a8,
+ [TEMPMONIDET3] = 0x0b0,
+ [TEMPADCPNP3] = 0x0b4,
+ [TEMPMSR3] = 0x0b8,
+ [TEMPIMMD3] = 0x0bc,
+ [TEMPPROTCTL] = 0x0c0,
+ [TEMPPROTTA] = 0x0c4,
+ [TEMPPROTTB] = 0x0c8,
+ [TEMPPROTTC] = 0x0cc,
+ [TEMPSPARE0] = 0x0f0,
+ [TEMPSPARE1] = 0x0f4,
+ [TEMPSPARE2] = 0x0f8,
+ [TEMPSPARE3] = 0x0fc,
+ [TEMPMSR0_1] = 0x190,
+ [TEMPMSR1_1] = 0x194,
+ [TEMPMSR2_1] = 0x198,
+ [TEMPMSR3_1] = 0x1b8,
+ [DESCHAR] = 0xc00,
+ [TEMPCHAR] = 0xc04,
+ [DETCHAR] = 0xc08,
+ [AGECHAR] = 0xc0c,
+ [DCCONFIG] = 0xc10,
+ [AGECONFIG] = 0xc14,
+ [FREQPCT30] = 0xc18,
+ [FREQPCT74] = 0xc1c,
+ [LIMITVALS] = 0xc20,
+ [VBOOT] = 0xc24,
+ [DETWINDOW] = 0xc28,
+ [CONFIG] = 0xc2c,
+ [TSCALCS] = 0xc30,
+ [RUNCONFIG] = 0xc34,
+ [SVSEN] = 0xc38,
+ [INIT2VALS] = 0xc3c,
+ [DCVALUES] = 0xc40,
+ [AGEVALUES] = 0xc44,
+ [VOP30] = 0xc48,
+ [VOP74] = 0xc4c,
+ [TEMP] = 0xc50,
+ [INTSTS] = 0xc54,
+ [INTSTSRAW] = 0xc58,
+ [INTEN] = 0xc5c,
+ [CHKINT] = 0xc60,
+ [CHKSHIFT] = 0xc64,
+ [STATUS] = 0xc68,
+ [VDESIGN30] = 0xc6c,
+ [VDESIGN74] = 0xc70,
+ [DVT30] = 0xc74,
+ [DVT74] = 0xc78,
+ [AGECOUNT] = 0xc7c,
+ [SMSTATE0] = 0xc80,
+ [SMSTATE1] = 0xc84,
+ [CTL0] = 0xc88,
+ [DESDETSEC] = 0xce0,
+ [TEMPAGESEC] = 0xce4,
+ [CTRLSPARE0] = 0xcf0,
+ [CTRLSPARE1] = 0xcf4,
+ [CTRLSPARE2] = 0xcf8,
+ [CTRLSPARE3] = 0xcfc,
+ [CORESEL] = 0xf00,
+ [THERMINTST] = 0xf04,
+ [INTST] = 0xf08,
+ [THSTAGE0ST] = 0xf0c,
+ [THSTAGE1ST] = 0xf10,
+ [THSTAGE2ST] = 0xf14,
+ [THAHBST0] = 0xf18,
+ [THAHBST1] = 0xf1c,
+ [SPARE0] = 0xf20,
+ [SPARE1] = 0xf24,
+ [SPARE2] = 0xf28,
+ [SPARE3] = 0xf2c,
+ [THSLPEVEB] = 0xf30,
+};
+
+struct thermal_parameter {
+ int adc_ge_t;
+ int adc_oe_t;
+ int ge;
+ int oe;
+ int gain;
+ int o_vtsabb;
+ int o_vtsmcu1;
+ int o_vtsmcu2;
+ int o_vtsmcu3;
+ int o_vtsmcu4;
+ int o_vtsmcu5;
+ int degc_cali;
+ int adc_cali_en_t;
+ int o_slope;
+ int o_slope_sign;
+ int ts_id;
+};
+
+struct svs_bank_ops {
+ void (*set_freqs_pct)(struct mtk_svs *svs);
+ void (*get_vops)(struct mtk_svs *svs);
+};
+
+struct svs_bank {
+ struct svs_bank_ops *ops;
+ struct completion init_completion;
+ struct device *dev;
+ struct regulator *buck;
+ struct mutex lock; /* lock to protect update voltage process */
+ bool suspended;
+ bool mtcmos_request;
+ bool init01_support;
+ bool init02_support;
+ bool mon_mode_support;
+ s32 volt_offset;
+ u32 *opp_freqs;
+ u32 *freqs_pct;
+ u32 *opp_volts;
+ u32 *init02_volts;
+ u32 *volts;
+ u32 reg_data[3][reg_num];
+ u32 freq_base;
+ u32 vboot;
+ u32 volt_step;
+ u32 volt_base;
+ u32 init01_volt_flag;
+ u32 phase;
+ u32 vmax;
+ u32 vmin;
+ u32 bts;
+ u32 mts;
+ u32 bdes;
+ u32 mdes;
+ u32 mtdes;
+ u32 dcbdet;
+ u32 dcmdet;
+ u32 dthi;
+ u32 dtlo;
+ u32 det_window;
+ u32 det_max;
+ u32 age_config;
+ u32 age_voffset_in;
+ u32 agem;
+ u32 dc_config;
+ u32 dc_voffset_in;
+ u32 dvt_fixed;
+ u32 vco;
+ u32 chkshift;
+ u32 svs_temp;
+ u32 upper_temp_bound;
+ u32 lower_temp_bound;
+ u32 low_temp_threashold;
+ u32 low_temp_offset;
+ u32 coresel;
+ u32 opp_count;
+ u32 intst;
+ u32 systemclk_en;
+ u32 sw_id;
+ u32 hw_id;
+ u32 ctl0;
+ u8 *of_compatible;
+ u8 *name;
+ u8 *zone_name;
+ u8 *buck_name;
+};
+
+struct svs_platform {
+ struct svs_bank *banks;
+ int (*efuse_parsing)(struct mtk_svs *svs);
+ bool fake_efuse;
+ const u32 *regs;
+ u32 bank_num;
+ u32 efuse_num;
+ u32 efuse_check;
+ u32 thermal_efuse_num;
+ u8 *name;
+};
+
+struct mtk_svs {
+ const struct svs_platform *platform;
+ struct svs_bank *bank;
+ struct device *dev;
+ void __iomem *base;
+ struct clk *main_clk;
+ u32 *efuse;
+ u32 *thermal_efuse;
+};
+
+unsigned long claim_mtk_svs_lock(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mtk_svs_lock, flags);
+
+ return flags;
+}
+EXPORT_SYMBOL_GPL(claim_mtk_svs_lock);
+
+void release_mtk_svs_lock(unsigned long flags)
+{
+ spin_unlock_irqrestore(&mtk_svs_lock, flags);
+}
+EXPORT_SYMBOL_GPL(release_mtk_svs_lock);
+
+static u32 percent(u32 numerator, u32 denominator)
+{
+ u32 percent;
+
+ /* If not divide 1000, "numerator * 100" would be data overflow. */
+ numerator /= 1000;
+ denominator /= 1000;
+ percent = ((numerator * 100) + denominator - 1) / denominator;
+
+ return percent;
+}
+
+static u32 svs_readl(struct mtk_svs *svs, enum reg_index i)
+{
+ return readl(svs->base + svs->platform->regs[i]);
+}
+
+static void svs_writel(struct mtk_svs *svs, u32 val, enum reg_index i)
+{
+ writel(val, svs->base + svs->platform->regs[i]);
+}
+
+static void svs_switch_bank(struct mtk_svs *svs)
+{
+ struct svs_bank *svsb = svs->bank;
+
+ svs_writel(svs, svsb->coresel, CORESEL);
+}
+
+static u32 svs_volt_to_opp_volt(u32 svsb_volt,
+ u32 svsb_volt_step, u32 svsb_volt_base)
+{
+ u32 u_volt;
+
+ u_volt = (svsb_volt * svsb_volt_step) + svsb_volt_base;
+
+ return u_volt;
+}
+
+static int svs_get_zone_temperature(struct svs_bank *svsb, int *zone_temp)
+{
+ struct thermal_zone_device *tzd;
+ int ret;
+
+ tzd = thermal_zone_get_zone_by_name(svsb->zone_name);
+ ret = thermal_zone_get_temp(tzd, zone_temp);
+
+ return ret;
+}
+
+static int svs_set_volts(struct svs_bank *svsb, bool force_update)
+{
+ u32 i, svsb_volt, opp_volt, low_temp_offset = 0;
+ int zone_temp, ret;
+
+ mutex_lock(&svsb->lock);
+
+ /* If bank is suspended, it means init02 voltage is applied.
+ * Don't need to update opp voltage anymore.
+ */
+ if (svsb->suspended && !force_update) {
+ pr_notice("%s: bank is suspended\n", svsb->name);
+ mutex_unlock(&svsb->lock);
+ return -EPERM;
+ }
+
+ /* get thermal effect */
+ if (svsb->phase == SVS_PHASE_MON) {
+ if (svsb->svs_temp > svsb->upper_temp_bound &&
+ svsb->svs_temp < svsb->lower_temp_bound) {
+ pr_err("%s: svs_temp is abnormal (0x%x)?\n",
+ svsb->name, svsb->svs_temp);
+ mutex_unlock(&svsb->lock);
+ return -EINVAL;
+ }
+
+ ret = svs_get_zone_temperature(svsb, &zone_temp);
+ if (ret) {
+ pr_err("%s: cannot get zone \"%s\" temperature\n",
+ svsb->name, svsb->zone_name);
+ pr_err("%s: add low_temp_offset = %u\n",
+ svsb->name, svsb->low_temp_offset);
+ zone_temp = svsb->low_temp_threashold;
+ }
+
+ if (zone_temp <= svsb->low_temp_threashold)
+ low_temp_offset = svsb->low_temp_offset;
+ }
+
+ /* vmin <= svsb_volt (opp_volt) <= signed-off voltage */
+ for (i = 0; i < svsb->opp_count; i++) {
+ if (svsb->phase == SVS_PHASE_MON) {
+ svsb_volt = max((svsb->volts[i] + svsb->volt_offset +
+ low_temp_offset), svsb->vmin);
+ opp_volt = svs_volt_to_opp_volt(svsb_volt,
+ svsb->volt_step,
+ svsb->volt_base);
+ } else if (svsb->phase == SVS_PHASE_INIT02) {
+ svsb_volt = max((svsb->init02_volts[i] +
+ svsb->volt_offset), svsb->vmin);
+ opp_volt = svs_volt_to_opp_volt(svsb_volt,
+ svsb->volt_step,
+ svsb->volt_base);
+ } else if (svsb->phase == SVS_PHASE_ERROR) {
+ opp_volt = svsb->opp_volts[i];
+ } else {
+ pr_err("%s: unknown phase: %u?\n",
+ svsb->name, svsb->phase);
+ mutex_unlock(&svsb->lock);
+ return -EINVAL;
+ }
+
+ opp_volt = min(opp_volt, svsb->opp_volts[i]);
+ ret = dev_pm_opp_adjust_voltage(svsb->dev, svsb->opp_freqs[i],
+ opp_volt);
+ if (ret) {
+ pr_err("%s: set voltage failed: %d\n", svsb->name, ret);
+ mutex_unlock(&svsb->lock);
+ return ret;
+ }
+ }
+
+ mutex_unlock(&svsb->lock);
+
+ return 0;
+}
+
+static u32 interpolate(u32 f0, u32 f1, u32 v0, u32 v1, u32 fx)
+{
+ u32 vy;
+
+ if (v0 == v1 || f0 == f1)
+ return v0;
+
+ /* *100 to have decimal fraction factor, +99 for rounding up. */
+ vy = (v0 * 100) - ((((v0 - v1) * 100) / (f0 - f1)) * (f0 - fx));
+ vy = (vy + 99) / 100;
+
+ return vy;
+}
+
+static void svs_get_vops_v2(struct mtk_svs *svs)
+{
+ struct svs_bank *svsb = svs->bank;
+ u32 temp, i;
+
+ temp = svs_readl(svs, VOP30);
+ svsb->volts[6] = (temp >> 24) & 0xff;
+ svsb->volts[4] = (temp >> 16) & 0xff;
+ svsb->volts[2] = (temp >> 8) & 0xff;
+ svsb->volts[0] = (temp & 0xff);
+
+ temp = svs_readl(svs, VOP74);
+ svsb->volts[14] = (temp >> 24) & 0xff;
+ svsb->volts[12] = (temp >> 16) & 0xff;
+ svsb->volts[10] = (temp >> 8) & 0xff;
+ svsb->volts[8] = (temp & 0xff);
+
+ for (i = 0; i <= 7; i++) {
+ if (i < 7) {
+ svsb->volts[(i * 2) + 1] =
+ interpolate(svsb->freqs_pct[i * 2],
+ svsb->freqs_pct[(i + 1) * 2],
+ svsb->volts[i * 2],
+ svsb->volts[(i + 1) * 2],
+ svsb->freqs_pct[(i * 2) + 1]);
+ } else if (i == 7) {
+ svsb->volts[(i * 2) + 1] =
+ interpolate(svsb->freqs_pct[(i - 1) * 2],
+ svsb->freqs_pct[i * 2],
+ svsb->volts[(i - 1) * 2],
+ svsb->volts[i * 2],
+ svsb->freqs_pct[(i * 2) + 1]);
+ }
+ }
+}
+
+static void svs_set_freqs_pct_v2(struct mtk_svs *svs)
+{
+ struct svs_bank *svsb = svs->bank;
+
+ svs_writel(svs,
+ ((svsb->freqs_pct[6] << 24) & 0xff000000) |
+ ((svsb->freqs_pct[4] << 16) & 0xff0000) |
+ ((svsb->freqs_pct[2] << 8) & 0xff00) |
+ (svsb->freqs_pct[0] & 0xff),
+ FREQPCT30);
+ svs_writel(svs,
+ ((svsb->freqs_pct[14] << 24) & 0xff000000) |
+ ((svsb->freqs_pct[12] << 16) & 0xff0000) |
+ ((svsb->freqs_pct[10] << 8) & 0xff00) |
+ ((svsb->freqs_pct[8]) & 0xff),
+ FREQPCT74);
+}
+
+static void svs_set_phase(struct mtk_svs *svs, u32 target_phase)
+{
+ struct svs_bank *svsb = svs->bank;
+ u32 des_char, temp_char, det_char, limit_vals;
+ u32 init2vals, ts_calcs, val, filter, i;
+
+ svs_switch_bank(svs);
+
+ des_char = ((svsb->bdes << 8) & 0xff00) | (svsb->mdes & 0xff);
+ svs_writel(svs, des_char, DESCHAR);
+
+ temp_char = ((svsb->vco << 16) & 0xff0000) |
+ ((svsb->mtdes << 8) & 0xff00) |
+ (svsb->dvt_fixed & 0xff);
+ svs_writel(svs, temp_char, TEMPCHAR);
+
+ det_char = ((svsb->dcbdet << 8) & 0xff00) | (svsb->dcmdet & 0xff);
+ svs_writel(svs, det_char, DETCHAR);
+
+ svs_writel(svs, svsb->dc_config, DCCONFIG);
+ svs_writel(svs, svsb->age_config, AGECONFIG);
+
+ if (svsb->agem == 0x0) {
+ svs_writel(svs, 0x80000000, RUNCONFIG);
+ } else {
+ val = 0x0;
+
+ for (i = 0; i < 24; i += 2) {
+ filter = 0x3 << i;
+
+ if ((svsb->age_config & filter) == 0x0)
+ val |= (0x1 << i);
+ else
+ val |= (svsb->age_config & filter);
+ }
+ svs_writel(svs, val, RUNCONFIG);
+ }
+
+ svsb->ops->set_freqs_pct(svs);
+
+ limit_vals = ((svsb->vmax << 24) & 0xff000000) |
+ ((svsb->vmin << 16) & 0xff0000) |
+ ((svsb->dthi << 8) & 0xff00) |
+ (svsb->dtlo & 0xff);
+ svs_writel(svs, limit_vals, LIMITVALS);
+ svs_writel(svs, (svsb->vboot & 0xff), VBOOT);
+ svs_writel(svs, (svsb->det_window & 0xffff), DETWINDOW);
+ svs_writel(svs, (svsb->det_max & 0xffff), CONFIG);
+
+ if (svsb->chkshift != 0)
+ svs_writel(svs, (svsb->chkshift & 0xff), CHKSHIFT);
+
+ if (svsb->ctl0 != 0)
+ svs_writel(svs, svsb->ctl0, CTL0);
+
+ svs_writel(svs, 0x00ffffff, INTSTS);
+
+ switch (target_phase) {
+ case SVS_PHASE_INIT01:
+ svs_writel(svs, 0x00005f01, INTEN);
+ svs_writel(svs, 0x00000001, SVSEN);
+ break;
+ case SVS_PHASE_INIT02:
+ svs_writel(svs, 0x00005f01, INTEN);
+ init2vals = ((svsb->age_voffset_in << 16) & 0xffff0000) |
+ (svsb->dc_voffset_in & 0xffff);
+ svs_writel(svs, init2vals, INIT2VALS);
+ svs_writel(svs, 0x00000005, SVSEN);
+ break;
+ case SVS_PHASE_MON:
+ ts_calcs = ((svsb->bts << 12) & 0xfff000) | (svsb->mts & 0xfff);
+ svs_writel(svs, ts_calcs, TSCALCS);
+ svs_writel(svs, 0x00FF0000, INTEN);
+ svs_writel(svs, 0x00000002, SVSEN);
+ break;
+ default:
+ WARN_ON(1);
+ break;
+ }
+}
+
+static inline void svs_init01_isr_handler(struct mtk_svs *svs)
+{
+ struct svs_bank *svsb = svs->bank;
+ enum reg_index rg_i;
+
+ pr_notice("%s: %s: VDN74:0x%08x, VDN30:0x%08x, DCVALUES:0x%08x\n",
+ svsb->name, __func__, svs_readl(svs, VDESIGN74),
+ svs_readl(svs, VDESIGN30), svs_readl(svs, DCVALUES));
+
+ for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
+ svsb->reg_data[SVS_PHASE_INIT01][rg_i] = svs_readl(svs, rg_i);
+
+ svsb->dc_voffset_in = ~(svs_readl(svs, DCVALUES) & 0xffff) + 1;
+ if (svsb->init01_volt_flag == SVS_INIT01_VOLT_IGNORE)
+ svsb->dc_voffset_in = 0;
+ else if ((svsb->dc_voffset_in & 0x8000) &&
+ (svsb->init01_volt_flag == SVS_INIT01_VOLT_INC_ONLY))
+ svsb->dc_voffset_in = 0;
+
+ svsb->age_voffset_in = svs_readl(svs, AGEVALUES) & 0xffff;
+
+ svs_writel(svs, 0x0, SVSEN);
+ svs_writel(svs, 0x1, INTSTS);
+
+ /* svs init01 clock gating */
+ svsb->coresel &= ~svsb->systemclk_en;
+
+ svsb->phase = SVS_PHASE_INIT01;
+ complete(&svsb->init_completion);
+}
+
+static inline void svs_init02_isr_handler(struct mtk_svs *svs)
+{
+ struct svs_bank *svsb = svs->bank;
+ enum reg_index rg_i;
+
+ pr_notice("%s: %s: VOP74:0x%08x, VOP30:0x%08x, DCVALUES:0x%08x\n",
+ svsb->name, __func__, svs_readl(svs, VOP74),
+ svs_readl(svs, VOP30), svs_readl(svs, DCVALUES));
+
+ for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
+ svsb->reg_data[SVS_PHASE_INIT02][rg_i] = svs_readl(svs, rg_i);
+
+ svsb->ops->get_vops(svs);
+ memcpy(svsb->init02_volts, svsb->volts, 4 * svsb->opp_count);
+ svsb->phase = SVS_PHASE_INIT02;
+
+ svs_writel(svs, 0x0, SVSEN);
+ svs_writel(svs, 0x1, INTSTS);
+
+ complete(&svsb->init_completion);
+}
+
+static inline void svs_mon_mode_isr_handler(struct mtk_svs *svs)
+{
+ struct svs_bank *svsb = svs->bank;
+ enum reg_index rg_i;
+
+ for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
+ svsb->reg_data[SVS_PHASE_MON][rg_i] = svs_readl(svs, rg_i);
+
+ svsb->svs_temp = svs_readl(svs, TEMP) & 0xff;
+
+ svsb->ops->get_vops(svs);
+ svsb->phase = SVS_PHASE_MON;
+
+ svs_writel(svs, 0x00ff0000, INTSTS);
+}
+
+static inline void svs_error_isr_handler(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb = svs->bank;
+ enum reg_index rg_i;
+
+ pr_err("%s(): %s(%s)", __func__, svsp->name, svsb->name);
+ pr_err("CORESEL(0x%x) = 0x%08x\n",
+ svsp->regs[CORESEL], svs_readl(svs, CORESEL)),
+ pr_err("SVSEN(0x%x) = 0x%08x, INTSTS(0x%x) = 0x%08x\n",
+ svsp->regs[SVSEN], svs_readl(svs, SVSEN),
+ svsp->regs[INTSTS], svs_readl(svs, INTSTS));
+ pr_err("SMSTATE0(0x%x) = 0x%08x, SMSTATE1(0x%x) = 0x%08x\n",
+ svsp->regs[SMSTATE0], svs_readl(svs, SMSTATE0),
+ svsp->regs[SMSTATE1], svs_readl(svs, SMSTATE1));
+
+ for (rg_i = TEMPMONCTL0; rg_i < reg_num; rg_i++)
+ svsb->reg_data[SVS_PHASE_MON][rg_i] = svs_readl(svs, rg_i);
+
+ svsb->init01_support = false;
+ svsb->init02_support = false;
+ svsb->mon_mode_support = false;
+
+ if (svsb->phase == SVS_PHASE_MON)
+ svsb->phase = SVS_PHASE_INIT02;
+
+ svs_writel(svs, 0x0, SVSEN);
+ svs_writel(svs, 0x00ffffff, INTSTS);
+}
+
+static inline void svs_isr_handler(struct mtk_svs *svs)
+{
+ u32 intsts, svsen;
+
+ svs_switch_bank(svs);
+
+ intsts = svs_readl(svs, INTSTS);
+ svsen = svs_readl(svs, SVSEN);
+
+ if (intsts == 0x1 && ((svsen & 0x7) == 0x1))
+ svs_init01_isr_handler(svs);
+ else if ((intsts == 0x1) && ((svsen & 0x7) == 0x5))
+ svs_init02_isr_handler(svs);
+ else if ((intsts & 0x00ff0000) != 0x0)
+ svs_mon_mode_isr_handler(svs);
+ else
+ svs_error_isr_handler(svs);
+}
+
+static irqreturn_t svs_isr(int irq, void *data)
+{
+ struct mtk_svs *svs = (struct mtk_svs *)data;
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb = NULL;
+ unsigned long flags;
+ u32 idx;
+
+ flags = claim_mtk_svs_lock();
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svs->bank = svsb;
+
+ if (svsb->suspended)
+ continue;
+ else if (svsb->intst & svs_readl(svs, INTST))
+ continue;
+
+ svs_isr_handler(svs);
+ break;
+ }
+ release_mtk_svs_lock(flags);
+
+ if (svsb->phase != SVS_PHASE_INIT01)
+ svs_set_volts(svsb, false);
+
+ return IRQ_HANDLED;
+}
+
+static void svs_mon_mode(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ unsigned long flags;
+ u32 idx;
+
+ flags = claim_mtk_svs_lock();
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svs->bank = svsb;
+
+ if (!svsb->mon_mode_support)
+ continue;
+
+ svs_set_phase(svs, SVS_PHASE_MON);
+ }
+ release_mtk_svs_lock(flags);
+}
+
+static int svs_init02(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ unsigned long flags, time_left;
+ u32 idx;
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svs->bank = svsb;
+
+ if (!svsb->init02_support)
+ continue;
+
+ reinit_completion(&svsb->init_completion);
+ flags = claim_mtk_svs_lock();
+ svs_set_phase(svs, SVS_PHASE_INIT02);
+ release_mtk_svs_lock(flags);
+ time_left =
+ wait_for_completion_timeout(&svsb->init_completion,
+ msecs_to_jiffies(2000));
+ if (time_left == 0) {
+ pr_err("%s: init02 completion timeout\n", svsb->name);
+ return -EBUSY;
+ }
+ }
+
+ return 0;
+}
+
+static int svs_init01(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ struct pm_qos_request qos_request = { {0} };
+ unsigned long flags, time_left;
+ bool search_done;
+ int ret = -EINVAL;
+ u32 opp_freqs, opp_vboot, buck_volt, idx, i;
+
+ /* Let CPUs leave idle-off state for initializing svs_init01. */
+ pm_qos_add_request(&qos_request, PM_QOS_CPU_DMA_LATENCY, 0);
+
+ /* Sometimes two svs_bank use the same buck.
+ * Therefore, we set each svs_bank to vboot voltage first.
+ */
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ search_done = false;
+
+ if (!svsb->init01_support)
+ continue;
+
+ ret = regulator_set_mode(svsb->buck, REGULATOR_MODE_FAST);
+ if (ret)
+ pr_notice("%s: fail to set fast mode: %d\n",
+ svsb->name, ret);
+
+ if (svsb->mtcmos_request) {
+ ret = regulator_enable(svsb->buck);
+ if (ret) {
+ pr_err("%s: fail to enable %s power: %d\n",
+ svsb->name, svsb->buck_name, ret);
+ goto err_init;
+ }
+
+ ret = dev_pm_domain_attach(svsb->dev, false);
+ if (ret) {
+ pr_err("%s: attach pm domain fail: %d\n",
+ svsb->name, ret);
+ goto err_init;
+ }
+
+ pm_runtime_enable(svsb->dev);
+ ret = pm_runtime_get_sync(svsb->dev);
+ if (ret < 0) {
+ pr_err("%s: turn mtcmos on fail: %d\n",
+ svsb->name, ret);
+ goto err_init;
+ }
+ }
+
+ /* Find the fastest freq that can be run at vboot and
+ * fix to that freq until svs_init01 is done.
+ */
+ opp_vboot = svs_volt_to_opp_volt(svsb->vboot,
+ svsb->volt_step,
+ svsb->volt_base);
+
+ for (i = 0; i < svsb->opp_count; i++) {
+ opp_freqs = svsb->opp_freqs[i];
+ if (!search_done && svsb->opp_volts[i] <= opp_vboot) {
+ ret = dev_pm_opp_adjust_voltage(svsb->dev,
+ opp_freqs,
+ opp_vboot);
+ if (ret) {
+ pr_err("%s: set voltage failed: %d\n",
+ svsb->name, ret);
+ goto err_init;
+ }
+
+ search_done = true;
+ } else {
+ dev_pm_opp_disable(svsb->dev,
+ svsb->opp_freqs[i]);
+ }
+ }
+ }
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svs->bank = svsb;
+
+ if (!svsb->init01_support)
+ continue;
+
+ opp_vboot = svs_volt_to_opp_volt(svsb->vboot,
+ svsb->volt_step,
+ svsb->volt_base);
+
+ buck_volt = regulator_get_voltage(svsb->buck);
+ if (buck_volt != opp_vboot) {
+ pr_err("%s: buck voltage: %u, expected vboot: %u\n",
+ svsb->name, buck_volt, opp_vboot);
+ ret = -EPERM;
+ goto err_init;
+ }
+
+ init_completion(&svsb->init_completion);
+ flags = claim_mtk_svs_lock();
+ svs_set_phase(svs, SVS_PHASE_INIT01);
+ release_mtk_svs_lock(flags);
+ time_left =
+ wait_for_completion_timeout(&svsb->init_completion,
+ msecs_to_jiffies(2000));
+ if (time_left == 0) {
+ pr_err("%s: init01 completion timeout\n", svsb->name);
+ ret = -EBUSY;
+ goto err_init;
+ }
+ }
+
+err_init:
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+
+ if (!svsb->init01_support)
+ continue;
+
+ for (i = 0; i < svsb->opp_count; i++)
+ dev_pm_opp_enable(svsb->dev, svsb->opp_freqs[i]);
+
+ if (regulator_set_mode(svsb->buck, REGULATOR_MODE_NORMAL))
+ pr_notice("%s: fail to set normal mode: %d\n",
+ svsb->name, ret);
+
+ if (svsb->mtcmos_request) {
+ if (pm_runtime_put_sync(svsb->dev))
+ pr_err("%s: turn mtcmos off fail: %d\n",
+ svsb->name, ret);
+ pm_runtime_disable(svsb->dev);
+ dev_pm_domain_detach(svsb->dev, 0);
+ if (regulator_disable(svsb->buck))
+ pr_err("%s: fail to disable %s power: %d\n",
+ svsb->name, svsb->buck_name, ret);
+ }
+ }
+
+ pm_qos_remove_request(&qos_request);
+
+ return ret;
+}
+
+static int svs_start(struct mtk_svs *svs)
+{
+ int ret;
+
+ ret = svs_init01(svs);
+ if (ret)
+ return ret;
+
+ ret = svs_init02(svs);
+ if (ret)
+ return ret;
+
+ svs_mon_mode(svs);
+
+ return ret;
+}
+
+static int svs_mt8183_efuse_parsing(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct thermal_parameter tp;
+ struct svs_bank *svsb;
+ bool mon_mode_support = true;
+ int format[6], x_roomt[6], tb_roomt;
+ u32 idx, i, ft_pgm, mts, temp0, temp1, temp2;
+
+ if (svsp->fake_efuse) {
+ svs->efuse[0] = 0x00110070;
+ svs->efuse[1] = 0xe7fcbb1b;
+ svs->efuse[2] = 0x478b47c7;
+ svs->efuse[3] = 0xabfbf757;
+ svs->efuse[4] = 0xe7fca4ed;
+ svs->efuse[5] = 0x47b84bc4;
+ svs->efuse[6] = 0xe7fcc3e9;
+ svs->efuse[7] = 0xe7fc9d0d;
+ svs->efuse[8] = 0x4bb84bf0;
+ svs->efuse[9] = 0xabfbdd79;
+ svs->efuse[16] = 0xe7fcb11c;
+ svs->efuse[17] = 0x47b847ff;
+ svs->efuse[18] = 0xabfbf557;
+
+ svs->thermal_efuse[0] = 0x02bf5c65;
+ svs->thermal_efuse[1] = 0x9ede715f;
+ svs->thermal_efuse[2] = 0xb0d9acc0;
+ }
+
+ /* svs efuse parsing */
+ ft_pgm = (svs->efuse[0] >> 4) & 0xf;
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ if (ft_pgm <= 1)
+ svsb->init01_volt_flag = SVS_INIT01_VOLT_IGNORE;
+
+ switch (svsb->sw_id) {
+ case SVS_CPU_LITTLE:
+ svsb->bdes = svs->efuse[16] & 0xff;
+ svsb->mdes = (svs->efuse[16] >> 8) & 0xff;
+ svsb->dcbdet = (svs->efuse[16] >> 16) & 0xff;
+ svsb->dcmdet = (svs->efuse[16] >> 24) & 0xff;
+ svsb->mtdes = (svs->efuse[17] >> 16) & 0xff;
+
+ if (ft_pgm <= 3)
+ svsb->volt_offset += 10;
+ else
+ svsb->volt_offset += 2;
+ break;
+ case SVS_CPU_BIG:
+ svsb->bdes = svs->efuse[18] & 0xff;
+ svsb->mdes = (svs->efuse[18] >> 8) & 0xff;
+ svsb->dcbdet = (svs->efuse[18] >> 16) & 0xff;
+ svsb->dcmdet = (svs->efuse[18] >> 24) & 0xff;
+ svsb->mtdes = svs->efuse[17] & 0xff;
+
+ if (ft_pgm <= 3)
+ svsb->volt_offset += 15;
+ else
+ svsb->volt_offset += 12;
+ break;
+ case SVS_CCI:
+ svsb->bdes = svs->efuse[4] & 0xff;
+ svsb->mdes = (svs->efuse[4] >> 8) & 0xff;
+ svsb->dcbdet = (svs->efuse[4] >> 16) & 0xff;
+ svsb->dcmdet = (svs->efuse[4] >> 24) & 0xff;
+ svsb->mtdes = (svs->efuse[5] >> 16) & 0xff;
+
+ if (ft_pgm <= 3)
+ svsb->volt_offset += 10;
+ else
+ svsb->volt_offset += 2;
+ break;
+ case SVS_GPU:
+ svsb->bdes = svs->efuse[6] & 0xff;
+ svsb->mdes = (svs->efuse[6] >> 8) & 0xff;
+ svsb->dcbdet = (svs->efuse[6] >> 16) & 0xff;
+ svsb->dcmdet = (svs->efuse[6] >> 24) & 0xff;
+ svsb->mtdes = svs->efuse[5] & 0xff;
+
+ if (ft_pgm >= 2) {
+ svsb->freq_base = 800000000; /* 800MHz */
+ svsb->dvt_fixed = 2;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ for (i = 0; i < svsp->efuse_num; i++) {
+ if (svs->efuse[i])
+ pr_notice("M_HW_RES%d: 0x%08x\n", i, svs->efuse[i]);
+ }
+
+ /* thermal efuse parsing */
+ if (!svs->thermal_efuse)
+ return 0;
+
+ tp.adc_ge_t = (svs->thermal_efuse[1] >> 22) & 0x3ff;
+ tp.adc_oe_t = (svs->thermal_efuse[1] >> 12) & 0x3ff;
+
+ tp.o_vtsmcu1 = (svs->thermal_efuse[0] >> 17) & 0x1ff;
+ tp.o_vtsmcu2 = (svs->thermal_efuse[0] >> 8) & 0x1ff;
+ tp.o_vtsmcu3 = svs->thermal_efuse[1] & 0x1ff;
+ tp.o_vtsmcu4 = (svs->thermal_efuse[2] >> 23) & 0x1ff;
+ tp.o_vtsmcu5 = (svs->thermal_efuse[2] >> 5) & 0x1ff;
+ tp.o_vtsabb = (svs->thermal_efuse[2] >> 14) & 0x1ff;
+
+ tp.degc_cali = (svs->thermal_efuse[0] >> 1) & 0x3f;
+ tp.adc_cali_en_t = svs->thermal_efuse[0] & BIT(0);
+ tp.o_slope_sign = (svs->thermal_efuse[0] >> 7) & BIT(0);
+
+ tp.ts_id = (svs->thermal_efuse[1] >> 9) & BIT(0);
+ tp.o_slope = (svs->thermal_efuse[0] >> 26) & 0x3f;
+
+ if (tp.adc_cali_en_t == 1) {
+ if (tp.ts_id == 0)
+ tp.o_slope = 0;
+
+ if ((tp.adc_ge_t < 265 || tp.adc_ge_t > 758) ||
+ (tp.adc_oe_t < 265 || tp.adc_oe_t > 758) ||
+ (tp.o_vtsmcu1 < -8 || tp.o_vtsmcu1 > 484) ||
+ (tp.o_vtsmcu2 < -8 || tp.o_vtsmcu2 > 484) ||
+ (tp.o_vtsmcu3 < -8 || tp.o_vtsmcu3 > 484) ||
+ (tp.o_vtsmcu4 < -8 || tp.o_vtsmcu4 > 484) ||
+ (tp.o_vtsmcu5 < -8 || tp.o_vtsmcu5 > 484) ||
+ (tp.o_vtsabb < -8 || tp.o_vtsabb > 484) ||
+ (tp.degc_cali < 1 || tp.degc_cali > 63)) {
+ pr_err("bad thermal efuse data. disable mon mode\n");
+ mon_mode_support = false;
+ }
+ } else {
+ pr_err("no thermal efuse data. disable mon mode\n");
+ mon_mode_support = false;
+ }
+
+ if (!mon_mode_support) {
+ for (i = 0; i < svsp->thermal_efuse_num; i++)
+ pr_err("thermal_efuse[%u] = 0x%08x\n",
+ i, svs->thermal_efuse[i]);
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svsb->mon_mode_support = false;
+ }
+
+ return 0;
+ }
+
+ tp.ge = ((tp.adc_ge_t - 512) * 10000) / 4096;
+ tp.oe = (tp.adc_oe_t - 512);
+ tp.gain = (10000 + tp.ge);
+
+ format[0] = (tp.o_vtsmcu1 + 3350 - tp.oe);
+ format[1] = (tp.o_vtsmcu2 + 3350 - tp.oe);
+ format[2] = (tp.o_vtsmcu3 + 3350 - tp.oe);
+ format[3] = (tp.o_vtsmcu4 + 3350 - tp.oe);
+ format[4] = (tp.o_vtsmcu5 + 3350 - tp.oe);
+ format[5] = (tp.o_vtsabb + 3350 - tp.oe);
+
+ for (i = 0; i < 6; i++)
+ x_roomt[i] = (((format[i] * 10000) / 4096) * 10000) / tp.gain;
+
+ temp0 = (10000 * 100000 / tp.gain) * 15 / 18;
+
+ if (tp.o_slope_sign == 0)
+ mts = (temp0 * 10) / (1534 + tp.o_slope * 10);
+ else
+ mts = (temp0 * 10) / (1534 - tp.o_slope * 10);
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svsb->mts = mts;
+
+ switch (svsb->sw_id) {
+ case SVS_CPU_LITTLE:
+ tb_roomt = x_roomt[3];
+ break;
+ case SVS_CPU_BIG:
+ tb_roomt = x_roomt[4];
+ break;
+ case SVS_CCI:
+ tb_roomt = x_roomt[3];
+ break;
+ case SVS_GPU:
+ tb_roomt = x_roomt[1];
+ break;
+ default:
+ pr_err("unknown svsb_id = %u? disable svs\n",
+ svsb->sw_id);
+ return -EINVAL;
+ }
+
+ temp0 = (tp.degc_cali * 10 / 2);
+ temp1 = ((10000 * 100000 / 4096 / tp.gain) *
+ tp.oe + tb_roomt * 10) * 15 / 18;
+
+ if (tp.o_slope_sign == 0)
+ temp2 = temp1 * 100 / (1534 + tp.o_slope * 10);
+ else
+ temp2 = temp1 * 100 / (1534 - tp.o_slope * 10);
+
+ svsb->bts = (temp0 + temp2 - 250) * 4 / 10;
+ }
+
+ return 0;
+}
+
+static int svs_is_support(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ struct nvmem_cell *cell;
+ size_t len;
+ int ret;
+ u32 idx, i;
+
+ if (svsp->fake_efuse) {
+ len = svsp->efuse_num * 4;
+ svs->efuse = kzalloc(len, GFP_KERNEL);
+ if (!svs->efuse)
+ return -ENOMEM;
+
+ len = svsp->thermal_efuse_num * 4;
+ svs->thermal_efuse = kzalloc(len, GFP_KERNEL);
+ if (!svs->thermal_efuse)
+ return -ENOMEM;
+
+ goto svsp_efuse_parsing;
+ }
+
+ /* get svs efuse by nvmem */
+ cell = nvmem_cell_get(svs->dev, "svs-calibration-data");
+ if (IS_ERR(cell)) {
+ pr_err("no \"svs-calibration-data\" from dts? disable svs\n");
+ return PTR_ERR(cell);
+ }
+
+ svs->efuse = (u32 *)nvmem_cell_read(cell, &len);
+ nvmem_cell_put(cell);
+
+ ret = (svs->efuse[svsp->efuse_check] == 0) ? -EPERM : 0;
+ if (ret) {
+ pr_err("no svs efuse. disable svs\n");
+ for (i = 0; i < svsp->efuse_num; i++)
+ pr_err("M_HW_RES%d: 0x%08x\n", i, svs->efuse[i]);
+ return ret;
+ }
+
+ /* get thermal efuse by nvmem */
+ cell = nvmem_cell_get(svs->dev, "calibration-data");
+ if (IS_ERR(cell)) {
+ pr_err("no \"calibration-data\" from dts? disable mon mode\n");
+ svs->thermal_efuse = NULL;
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svsb->mon_mode_support = false;
+ }
+ goto svsp_efuse_parsing;
+ }
+
+ svs->thermal_efuse = (u32 *)nvmem_cell_read(cell, &len);
+ nvmem_cell_put(cell);
+
+svsp_efuse_parsing:
+ ret = svsp->efuse_parsing(svs);
+
+ return ret;
+}
+
+static int svs_resource_setup(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ struct platform_device *pdev;
+ struct device_node *np = NULL;
+ struct dev_pm_opp *opp;
+ unsigned long freq;
+ int count, ret;
+ u32 idx, i;
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+
+ if (!svsb->init01_support)
+ continue;
+
+ switch (svsb->sw_id) {
+ case SVS_CPU_LITTLE:
+ svsb->name = "SVS_CPU_LITTLE";
+ break;
+ case SVS_CPU_BIG:
+ svsb->name = "SVS_CPU_BIG";
+ break;
+ case SVS_CCI:
+ svsb->name = "SVS_CCI";
+ break;
+ case SVS_GPU:
+ svsb->name = "SVS_GPU";
+ break;
+ default:
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ /* Add svs_bank device for opp-table/mtcmos/buck control */
+ pdev = platform_device_alloc(svsb->name, 0);
+ if (!pdev) {
+ pr_err("%s: fail to alloc pdev for svs_bank\n",
+ svsb->name);
+ return -ENOMEM;
+ }
+
+ for_each_child_of_node(svs->dev->of_node, np) {
+ if (of_device_is_compatible(np, svsb->of_compatible)) {
+ pdev->dev.of_node = np;
+ break;
+ }
+ }
+
+ ret = platform_device_add(pdev);
+ if (ret) {
+ pr_err("%s: fail to add svs_bank device: %d\n",
+ svsb->name, ret);
+ return ret;
+ }
+
+ svsb->dev = &pdev->dev;
+ dev_set_drvdata(svsb->dev, svs);
+ ret = dev_pm_opp_of_add_table(svsb->dev);
+ if (ret) {
+ pr_err("%s: fail to add opp table: %d\n",
+ svsb->name, ret);
+ return ret;
+ }
+
+ mutex_init(&svsb->lock);
+
+ svsb->buck = devm_regulator_get_optional(svsb->dev,
+ svsb->buck_name);
+ if (IS_ERR(svsb->buck)) {
+ pr_err("%s: cannot get regulator \"%s-supply\"\n",
+ svsb->name, svsb->buck_name);
+ return PTR_ERR(svsb->buck);
+ }
+
+ count = dev_pm_opp_get_opp_count(svsb->dev);
+ if (svsb->opp_count != count) {
+ pr_err("%s: opp_count not \"%u\" but get \"%d\"?\n",
+ svsb->name, svsb->opp_count, count);
+ return count;
+ }
+
+ svsb->opp_volts = kmalloc(4 * svsb->opp_count,
+ GFP_KERNEL);
+ if (IS_ERR(svsb->opp_volts)) {
+ pr_err("%s: fail kmalloc %u(bytes) to opp_volts\n",
+ svsb->name, (4 * svsb->opp_count));
+ return PTR_ERR(svsb->opp_volts);
+ }
+
+ svsb->init02_volts = kmalloc(4 * svsb->opp_count,
+ GFP_KERNEL);
+ if (IS_ERR(svsb->init02_volts)) {
+ pr_err("%s: fail kmalloc %u(bytes) to init02_volts\n",
+ svsb->name, (4 * svsb->opp_count));
+ return PTR_ERR(svsb->init02_volts);
+ }
+
+ svsb->volts = kmalloc(4 * svsb->opp_count,
+ GFP_KERNEL);
+ if (IS_ERR(svsb->volts)) {
+ pr_err("%s: fail kmalloc %u(bytes) to volts\n",
+ svsb->name, (4 * svsb->opp_count));
+ return PTR_ERR(svsb->volts);
+ }
+
+ svsb->opp_freqs = kmalloc(4 * svsb->opp_count,
+ GFP_KERNEL);
+ if (IS_ERR(svsb->opp_freqs)) {
+ pr_err("%s: fail kmalloc %u(bytes) to opp_freqs\n",
+ svsb->name, (4 * svsb->opp_count));
+ return PTR_ERR(svsb->opp_freqs);
+ }
+
+ svsb->freqs_pct = kmalloc(4 * svsb->opp_count,
+ GFP_KERNEL);
+ if (IS_ERR(svsb->freqs_pct)) {
+ pr_err("%s: fail kmalloc %u(bytes) to freqs_pct\n",
+ svsb->name, (4 * svsb->opp_count));
+ return PTR_ERR(svsb->freqs_pct);
+ }
+
+ for (i = 0, freq = (u32)-1; i < svsb->opp_count; i++, freq--) {
+ opp = dev_pm_opp_find_freq_floor(svsb->dev, &freq);
+ if (IS_ERR(opp)) {
+ pr_err("%s: error opp entry!!, err = %ld\n",
+ svsb->name, PTR_ERR(opp));
+ return PTR_ERR(opp);
+ }
+
+ svsb->opp_freqs[i] = freq;
+ svsb->opp_volts[i] = dev_pm_opp_get_voltage(opp);
+ svsb->freqs_pct[i] = percent(svsb->opp_freqs[i],
+ svsb->freq_base) & 0xff;
+ }
+ }
+
+ return 0;
+}
+
+static int svs_suspend(struct device *dev)
+{
+ struct mtk_svs *svs = dev_get_drvdata(dev);
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ unsigned long flags;
+ u32 idx;
+
+ /* Wait if there is processing svs_isr(). Suspend all banks. */
+ flags = claim_mtk_svs_lock();
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svs->bank = svsb;
+ svs_switch_bank(svs);
+ svs_writel(svs, 0x0, SVSEN);
+ svs_writel(svs, 0x00ffffff, INTSTS);
+ svsb->suspended = true;
+ }
+ release_mtk_svs_lock(flags);
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ if (svsb->phase == SVS_PHASE_MON) {
+ svsb->phase = SVS_PHASE_INIT02;
+ svs_set_volts(svsb, true);
+ }
+ }
+
+ clk_disable_unprepare(svs->main_clk);
+
+ return 0;
+}
+
+static int svs_resume(struct device *dev)
+{
+ struct mtk_svs *svs = dev_get_drvdata(dev);
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ int ret;
+ u32 idx;
+
+ ret = clk_prepare_enable(svs->main_clk);
+ if (ret)
+ pr_err("%s(): cannot enable main_clk\n", __func__);
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+ svsb->suspended = false;
+ }
+
+ ret = svs_init02(svs);
+ if (ret)
+ return ret;
+
+ svs_mon_mode(svs);
+
+ return 0;
+}
+
+static int svs_debug_proc_show(struct seq_file *m, void *v)
+{
+ struct svs_bank *svsb = (struct svs_bank *)m->private;
+
+ if (svsb->phase == SVS_PHASE_INIT01)
+ seq_puts(m, "init01\n");
+ else if (svsb->phase == SVS_PHASE_INIT02)
+ seq_puts(m, "init02\n");
+ else if (svsb->phase == SVS_PHASE_MON)
+ seq_puts(m, "mon mode\n");
+ else if (svsb->phase == SVS_PHASE_ERROR)
+ seq_puts(m, "disabled\n");
+ else
+ seq_puts(m, "unknown\n");
+
+ return 0;
+}
+
+static ssize_t svs_debug_proc_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ struct svs_bank *svsb = (struct svs_bank *)PDE_DATA(file_inode(file));
+ struct mtk_svs *svs = dev_get_drvdata(svsb->dev);
+ char *buf = (char *)__get_free_page(GFP_USER);
+ unsigned long flags;
+ int enabled, ret;
+
+ if (svsb->phase == SVS_PHASE_ERROR)
+ return count;
+
+ if (!buf)
+ return -ENOMEM;
+
+ if (count >= PAGE_SIZE) {
+ free_page((unsigned long)buf);
+ return -EINVAL;
+ }
+
+ if (copy_from_user(buf, buffer, count)) {
+ free_page((unsigned long)buf);
+ return -EFAULT;
+ }
+
+ buf[count] = '\0';
+
+ ret = kstrtoint(buf, 10, &enabled);
+ if (ret)
+ return ret;
+
+ if (!enabled) {
+ flags = claim_mtk_svs_lock();
+ svs->bank = svsb;
+
+ svsb->init01_support = false;
+ svsb->init02_support = false;
+ svsb->mon_mode_support = false;
+
+ svs_switch_bank(svs);
+ svs_writel(svs, 0x0, SVSEN);
+ svs_writel(svs, 0x00ffffff, INTSTS);
+ release_mtk_svs_lock(flags);
+ }
+
+ svsb->phase = SVS_PHASE_ERROR;
+ svs_set_volts(svsb, true);
+
+ return count;
+}
+
+proc_fops_rw(svs_debug);
+
+static int svs_dump_proc_show(struct seq_file *m, void *v)
+{
+ struct mtk_svs *svs = (struct mtk_svs *)m->private;
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ unsigned long svs_reg_addr;
+ u32 idx, i, j;
+
+ for (i = 0; i < svsp->efuse_num; i++) {
+ if (svs->efuse[i])
+ seq_printf(m, "M_HW_RES%d = 0x%08x\n",
+ i, svs->efuse[i]);
+ }
+
+ for (i = 0; i < svsp->thermal_efuse_num; i++) {
+ if (svs->thermal_efuse[i])
+ seq_printf(m, "THERMAL_EFUSE%d = 0x%08x\n",
+ i, svs->thermal_efuse[i]);
+ }
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+
+ if (!svsb->init01_support)
+ continue;
+
+ for (i = SVS_PHASE_INIT01; i <= SVS_PHASE_MON; i++) {
+ seq_printf(m, "bank number = %u\n", svsb->hw_id);
+
+ if (i < SVS_PHASE_MON)
+ seq_printf(m, "mode = init0%d\n", i + 1);
+ else
+ seq_puts(m, "mode = mon\n");
+
+ for (j = TEMPMONCTL0; j < reg_num; j++) {
+ svs_reg_addr = (unsigned long)(svs->base +
+ svsp->regs[j]);
+ seq_printf(m, "0x%08lx = 0x%08x\n",
+ svs_reg_addr, svsb->reg_data[i][j]);
+ }
+ }
+ }
+
+ return 0;
+}
+
+proc_fops_ro(svs_dump);
+
+static int svs_status_proc_show(struct seq_file *m, void *v)
+{
+ struct svs_bank *svsb = (struct svs_bank *)m->private;
+ struct dev_pm_opp *opp;
+ unsigned long freq;
+ int zone_temp, ret;
+ u32 i;
+
+ ret = svs_get_zone_temperature(svsb, &zone_temp);
+ if (ret)
+ seq_printf(m, "%s: cannot get zone \"%s\" temperature\n",
+ svsb->name, svsb->zone_name);
+ else
+ seq_printf(m, "%s: temperature = %d\n", svsb->name, zone_temp);
+
+ for (i = 0, freq = (u32)-1; i < svsb->opp_count; i++, freq--) {
+ opp = dev_pm_opp_find_freq_floor(svsb->dev, &freq);
+ if (IS_ERR(opp)) {
+ seq_printf(m, "%s: error opp entry!!, err = %ld\n",
+ svsb->name, PTR_ERR(opp));
+ return PTR_ERR(opp);
+ }
+
+ seq_printf(m, "opp_freqs[%02u]: %lu, volts[%02u]: %lu, ",
+ i, freq, i, dev_pm_opp_get_voltage(opp));
+ seq_printf(m, "svsb_volts[%02u]: 0x%x, freqs_pct[%02u]: %u\n",
+ i, svsb->volts[i], i, svsb->freqs_pct[i]);
+ }
+
+ return 0;
+}
+
+proc_fops_ro(svs_status);
+
+static int svs_volt_offset_proc_show(struct seq_file *m, void *v)
+{
+ struct svs_bank *svsb = (struct svs_bank *)m->private;
+
+ seq_printf(m, "%d\n", svsb->volt_offset);
+
+ return 0;
+}
+
+static ssize_t svs_volt_offset_proc_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ struct svs_bank *svsb = (struct svs_bank *)PDE_DATA(file_inode(file));
+ char *buf = (char *)__get_free_page(GFP_USER);
+ int ret, volt_offset;
+
+ if (!buf)
+ return -ENOMEM;
+
+ if (count >= PAGE_SIZE) {
+ free_page((unsigned long)buf);
+ return -EINVAL;
+ }
+
+ if (copy_from_user(buf, buffer, count)) {
+ free_page((unsigned long)buf);
+ return -EFAULT;
+ }
+
+ buf[count] = '\0';
+
+ if (!kstrtoint(buf, 10, &volt_offset)) {
+ svsb->volt_offset = volt_offset;
+ ret = svs_set_volts(svsb, true);
+ if (ret)
+ return ret;
+ }
+
+ return count;
+}
+
+proc_fops_rw(svs_volt_offset);
+
+static int svs_create_svs_procfs(struct mtk_svs *svs)
+{
+ const struct svs_platform *svsp = svs->platform;
+ struct svs_bank *svsb;
+ struct proc_dir_entry *svs_dir, *bank_dir;
+ u32 idx, i;
+
+ struct pentry {
+ const char *name;
+ const struct file_operations *fops;
+ };
+
+ struct pentry svs_entries[] = {
+ proc_entry(svs_dump),
+ };
+
+ struct pentry bank_entries[] = {
+ proc_entry(svs_debug),
+ proc_entry(svs_status),
+ proc_entry(svs_volt_offset),
+ };
+
+ svs_dir = proc_mkdir("svs", NULL);
+ if (!svs_dir) {
+ pr_err("mkdir /proc/svs failed\n");
+ return -EPERM;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(svs_entries); i++) {
+ if (!proc_create_data(svs_entries[i].name, 0664,
+ svs_dir, svs_entries[i].fops, svs)) {
+ pr_err("create /proc/svs/%s failed\n",
+ svs_entries[i].name);
+ return -EPERM;
+ }
+ }
+
+ for (idx = 0; idx < svsp->bank_num; idx++) {
+ svsb = &svsp->banks[idx];
+
+ if (!svsb->init01_support)
+ continue;
+
+ bank_dir = proc_mkdir(svsb->name, svs_dir);
+ if (!bank_dir) {
+ pr_err("mkdir /proc/svs/%s failed\n", svsb->name);
+ return -EPERM;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(bank_entries); i++) {
+ if (!proc_create_data(bank_entries[i].name, 0664,
+ bank_dir, bank_entries[i].fops,
+ svsb)) {
+ pr_err("create /proc/svs/%s/%s failed\n",
+ svsb->name, bank_entries[i].name);
+ return -EPERM;
+ }
+ }
+ }
+
+ return 0;
+}
+
+struct svs_bank_ops svs_mt8183_banks_ops = {
+ .set_freqs_pct = svs_set_freqs_pct_v2,
+ .get_vops = svs_get_vops_v2,
+};
+
+struct svs_bank svs_mt8183_banks[4] = {
+ {
+ .of_compatible = "mediatek,mt8183-svs-cpu-little",
+ .sw_id = SVS_CPU_LITTLE,
+ .hw_id = 0,
+ .ops = &svs_mt8183_banks_ops,
+ .zone_name = "tzts4",
+ .buck_name = "vcpu_little",
+ .mtcmos_request = false,
+ .init01_volt_flag = SVS_INIT01_VOLT_INC_ONLY,
+ .init01_support = true,
+ .init02_support = true,
+ .mon_mode_support = false,
+ .opp_count = 16,
+ .freq_base = 1989000000,
+ .vboot = 0x30,
+ .volt_step = 6250,
+ .volt_base = 500000,
+ .volt_offset = 0,
+ .vmax = 0x64,
+ .vmin = 0x10,
+ .dthi = 0x1,
+ .dtlo = 0xfe,
+ .det_window = 0xa28,
+ .det_max = 0xffff,
+ .age_config = 0x555555,
+ .agem = 0x0,
+ .dc_config = 0x555555,
+ .dvt_fixed = 0x7,
+ .vco = 0x10,
+ .chkshift = 0x77,
+ .upper_temp_bound = 0x64,
+ .lower_temp_bound = 0xb2,
+ .low_temp_threashold = 25000,
+ .low_temp_offset = 0,
+ .coresel = 0x8fff0000,
+ .systemclk_en = BIT(31),
+ .intst = BIT(0),
+ .ctl0 = 0x00010001,
+ },
+ {
+ .of_compatible = "mediatek,mt8183-svs-cpu-big",
+ .sw_id = SVS_CPU_BIG,
+ .hw_id = 1,
+ .ops = &svs_mt8183_banks_ops,
+ .zone_name = "tzts5",
+ .buck_name = "vcpu_big",
+ .mtcmos_request = false,
+ .init01_volt_flag = SVS_INIT01_VOLT_INC_ONLY,
+ .init01_support = true,
+ .init02_support = true,
+ .mon_mode_support = false,
+ .opp_count = 16,
+ .freq_base = 1989000000,
+ .vboot = 0x30,
+ .volt_step = 6250,
+ .volt_base = 500000,
+ .volt_offset = 0,
+ .vmax = 0x58,
+ .vmin = 0x10,
+ .dthi = 0x1,
+ .dtlo = 0xfe,
+ .det_window = 0xa28,
+ .det_max = 0xffff,
+ .age_config = 0x555555,
+ .agem = 0x0,
+ .dc_config = 0x555555,
+ .dvt_fixed = 0x7,
+ .vco = 0x10,
+ .chkshift = 0x77,
+ .upper_temp_bound = 0x64,
+ .lower_temp_bound = 0xb2,
+ .low_temp_threashold = 25000,
+ .low_temp_offset = 0,
+ .coresel = 0x8fff0001,
+ .systemclk_en = BIT(31),
+ .intst = BIT(1),
+ .ctl0 = 0x00000001,
+ },
+ {
+ .of_compatible = "mediatek,mt8183-svs-cci",
+ .sw_id = SVS_CCI,
+ .hw_id = 2,
+ .ops = &svs_mt8183_banks_ops,
+ .zone_name = "tzts4",
+ .buck_name = "vcci",
+ .mtcmos_request = false,
+ .init01_volt_flag = SVS_INIT01_VOLT_INC_ONLY,
+ .init01_support = true,
+ .init02_support = true,
+ .mon_mode_support = false,
+ .opp_count = 16,
+ .freq_base = 1196000000,
+ .vboot = 0x30,
+ .volt_step = 6250,
+ .volt_base = 500000,
+ .volt_offset = 0,
+ .vmax = 0x64,
+ .vmin = 0x10,
+ .dthi = 0x1,
+ .dtlo = 0xfe,
+ .det_window = 0xa28,
+ .det_max = 0xffff,
+ .age_config = 0x555555,
+ .agem = 0x0,
+ .dc_config = 0x555555,
+ .dvt_fixed = 0x7,
+ .vco = 0x10,
+ .chkshift = 0x77,
+ .upper_temp_bound = 0x64,
+ .lower_temp_bound = 0xb2,
+ .low_temp_threashold = 25000,
+ .low_temp_offset = 0,
+ .coresel = 0x8fff0002,
+ .systemclk_en = BIT(31),
+ .intst = BIT(2),
+ .ctl0 = 0x00100003,
+ },
+ {
+ .of_compatible = "mediatek,mt8183-svs-gpu",
+ .sw_id = SVS_GPU,
+ .hw_id = 3,
+ .ops = &svs_mt8183_banks_ops,
+ .zone_name = "tzts2",
+ .buck_name = "vgpu",
+ .mtcmos_request = true,
+ .init01_volt_flag = SVS_INIT01_VOLT_INC_ONLY,
+ .init01_support = true,
+ .init02_support = true,
+ .mon_mode_support = true,
+ .opp_count = 16,
+ .freq_base = 900000000,
+ .vboot = 0x30,
+ .volt_step = 6250,
+ .volt_base = 500000,
+ .volt_offset = 0,
+ .vmax = 0x40,
+ .vmin = 0x14,
+ .dthi = 0x1,
+ .dtlo = 0xfe,
+ .det_window = 0xa28,
+ .det_max = 0xffff,
+ .age_config = 0x555555,
+ .agem = 0x0,
+ .dc_config = 0x555555,
+ .dvt_fixed = 0x3,
+ .vco = 0x10,
+ .chkshift = 0x77,
+ .upper_temp_bound = 0x64,
+ .lower_temp_bound = 0xb2,
+ .low_temp_threashold = 25000,
+ .low_temp_offset = 3,
+ .coresel = 0x8fff0003,
+ .systemclk_en = BIT(31),
+ .intst = BIT(3),
+ .ctl0 = 0x00050001,
+ },
+};
+
+static const struct svs_platform svs_mt8183_platform = {
+ .name = "mt8183-svs",
+ .banks = svs_mt8183_banks,
+ .efuse_parsing = svs_mt8183_efuse_parsing,
+ .regs = svs_regs_v2,
+ .fake_efuse = false,
+ .bank_num = 4,
+ .efuse_num = 25,
+ .efuse_check = 2,
+ .thermal_efuse_num = 3,
+};
+
+static const struct of_device_id mtk_svs_of_match[] = {
+ {
+ .compatible = "mediatek,mt8183-svs",
+ .data = &svs_mt8183_platform,
+ }, {
+ /* sentinel */
+ },
+};
+
+static int svs_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_dev_id;
+ struct mtk_svs *svs;
+ int ret;
+ u32 svs_irq;
+
+ svs = devm_kzalloc(&pdev->dev, sizeof(*svs), GFP_KERNEL);
+ if (IS_ERR(svs))
+ return PTR_ERR(svs);
+
+ svs->dev = &pdev->dev;
+ if (!svs->dev->of_node) {
+ pr_err("cannot find device node\n");
+ return -ENODEV;
+ }
+
+ svs->base = of_iomap(svs->dev->of_node, 0);
+ if (IS_ERR(svs->base)) {
+ pr_err("cannot find svs register base\n");
+ return PTR_ERR(svs->base);
+ }
+
+ svs->main_clk = devm_clk_get(svs->dev, "main_clk");
+ if (IS_ERR(svs->main_clk))
+ pr_err("failed to get clock: %ld\n", PTR_ERR(svs->main_clk));
+
+ ret = clk_prepare_enable(svs->main_clk);
+ if (ret) {
+ pr_err("cannot enable main_clk: %d\n", ret);
+ return ret;
+ }
+
+ of_dev_id = of_match_node(mtk_svs_of_match, svs->dev->of_node);
+ if (!of_dev_id || !of_dev_id->data)
+ return -EINVAL;
+
+ svs->platform = of_dev_id->data;
+ dev_set_drvdata(svs->dev, svs);
+
+ svs_irq = irq_of_parse_and_map(svs->dev->of_node, 0);
+ ret = devm_request_threaded_irq(svs->dev, svs_irq, NULL, svs_isr,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "mtk-svs", svs);
+ if (ret) {
+ pr_err("register irq(%d) failed: %d\n", svs_irq, ret);
+ return ret;
+ }
+
+ ret = svs_is_support(svs);
+ if (ret)
+ return ret;
+
+ ret = svs_resource_setup(svs);
+ if (ret)
+ return ret;
+
+ ret = svs_start(svs);
+ if (ret)
+ return ret;
+
+ ret = svs_create_svs_procfs(svs);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct dev_pm_ops svs_pm_ops = {
+ .suspend = svs_suspend,
+ .resume = svs_resume,
+};
+
+static struct platform_driver svs_driver = {
+ .probe = svs_probe,
+ .driver = {
+ .name = "mtk-svs",
+ .pm = &svs_pm_ops,
+ .of_match_table = of_match_ptr(mtk_svs_of_match),
+ },
+};
+
+static int __init svs_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&svs_driver);
+ if (ret) {
+ pr_err("svs platform driver register failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+late_initcall_sync(svs_init);
+
+MODULE_DESCRIPTION("MediaTek SVS Driver v1.0");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright (C) 2018 MediaTek Inc.
+ */
+
+#ifndef __MTK_SVS_H__
+#define __MTK_SVS_H__
+
+#if defined(CONFIG_MTK_SVS)
+unsigned long claim_mtk_svs_lock(void);
+void release_mtk_svs_lock(unsigned long flags);
+#else
+static inline unsigned long claim_mtk_svs_lock(void)
+{
+ return 0;
+}
+
+static inline void release_mtk_svs_lock(unsigned long flags)
+{
+}
+#endif /* CONFIG_MTK_SVS */
+
+#endif /* __MTK_SVS_H__ */
The SVS (Smart Voltage Scaling) engine is a piece of hardware which is used to calculate optimized voltage values of several power domains, e.g. CPU/GPU/CCI, according to chip process corner, temperatures, and other factors. Then DVFS driver could apply those optimized voltage values to reduce power consumption. Signed-off-by: Roger Lu <roger.lu@mediatek.com> --- drivers/power/avs/Kconfig | 10 + drivers/power/avs/Makefile | 1 + drivers/power/avs/mtk_svs.c | 2084 +++++++++++++++++++++++++++++++++ include/linux/power/mtk_svs.h | 23 + 4 files changed, 2118 insertions(+) create mode 100644 drivers/power/avs/mtk_svs.c create mode 100644 include/linux/power/mtk_svs.h