diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/avs/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/power/avs/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/avs/rockchip-io-domain.c | 630 |
3 files changed, 0 insertions, 639 deletions
diff --git a/drivers/power/avs/Kconfig b/drivers/power/avs/Kconfig index cdb4237bfd02..e31215680771 100644 --- a/drivers/power/avs/Kconfig +++ b/drivers/power/avs/Kconfig @@ -27,11 +27,3 @@ config QCOM_CPR To compile this driver as a module, choose M here: the module will be called qcom-cpr - -config ROCKCHIP_IODOMAIN - tristate "Rockchip IO domain support" - depends on POWER_AVS && ARCH_ROCKCHIP && OF - help - 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. diff --git a/drivers/power/avs/Makefile b/drivers/power/avs/Makefile index 9007d05853e2..d611a465cd42 100644 --- a/drivers/power/avs/Makefile +++ b/drivers/power/avs/Makefile @@ -1,4 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_POWER_AVS_OMAP) += smartreflex.o obj-$(CONFIG_QCOM_CPR) += qcom-cpr.o -obj-$(CONFIG_ROCKCHIP_IODOMAIN) += rockchip-io-domain.o diff --git a/drivers/power/avs/rockchip-io-domain.c b/drivers/power/avs/rockchip-io-domain.c deleted file mode 100644 index eece97f97ef8..000000000000 --- a/drivers/power/avs/rockchip-io-domain.c +++ /dev/null @@ -1,630 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Rockchip IO Voltage Domain driver - * - * Copyright 2014 MundoReader S.L. - * Copyright 2014 Google, Inc. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/err.h> -#include <linux/mfd/syscon.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/regmap.h> -#include <linux/regulator/consumer.h> - -#define MAX_SUPPLIES 16 - -/* - * The max voltage for 1.8V and 3.3V come from the Rockchip datasheet under - * "Recommended Operating Conditions" for "Digital GPIO". When the typical - * is 3.3V the max is 3.6V. When the typical is 1.8V the max is 1.98V. - * - * They are used like this: - * - If the voltage on a rail is above the "1.8" voltage (1.98V) we'll tell the - * SoC we're at 3.3. - * - If the voltage on a rail is above the "3.3" voltage (3.6V) we'll consider - * that to be an error. - */ -#define MAX_VOLTAGE_1_8 1980000 -#define MAX_VOLTAGE_3_3 3600000 - -#define PX30_IO_VSEL 0x180 -#define PX30_IO_VSEL_VCCIO6_SRC BIT(0) -#define PX30_IO_VSEL_VCCIO6_SUPPLY_NUM 1 - -#define RK3288_SOC_CON2 0x24c -#define RK3288_SOC_CON2_FLASH0 BIT(7) -#define RK3288_SOC_FLASH_SUPPLY_NUM 2 - -#define RK3328_SOC_CON4 0x410 -#define RK3328_SOC_CON4_VCCIO2 BIT(7) -#define RK3328_SOC_VCCIO2_SUPPLY_NUM 1 - -#define RK3368_SOC_CON15 0x43c -#define RK3368_SOC_CON15_FLASH0 BIT(14) -#define RK3368_SOC_FLASH_SUPPLY_NUM 2 - -#define RK3399_PMUGRF_CON0 0x180 -#define RK3399_PMUGRF_CON0_VSEL BIT(8) -#define RK3399_PMUGRF_VSEL_SUPPLY_NUM 9 - -struct rockchip_iodomain; - -/** - * @supplies: voltage settings matching the register bits. - */ -struct rockchip_iodomain_soc_data { - int grf_offset; - const char *supply_names[MAX_SUPPLIES]; - void (*init)(struct rockchip_iodomain *iod); -}; - -struct rockchip_iodomain_supply { - struct rockchip_iodomain *iod; - struct regulator *reg; - struct notifier_block nb; - int idx; -}; - -struct rockchip_iodomain { - struct device *dev; - struct regmap *grf; - const struct rockchip_iodomain_soc_data *soc_data; - struct rockchip_iodomain_supply supplies[MAX_SUPPLIES]; -}; - -static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply, - int uV) -{ - struct rockchip_iodomain *iod = supply->iod; - u32 val; - int ret; - - /* set value bit */ - val = (uV > MAX_VOLTAGE_1_8) ? 0 : 1; - val <<= supply->idx; - - /* apply hiword-mask */ - val |= (BIT(supply->idx) << 16); - - ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val); - if (ret) - dev_err(iod->dev, "Couldn't write to GRF\n"); - - return ret; -} - -static int rockchip_iodomain_notify(struct notifier_block *nb, - unsigned long event, - void *data) -{ - struct rockchip_iodomain_supply *supply = - container_of(nb, struct rockchip_iodomain_supply, nb); - int uV; - int ret; - - /* - * According to Rockchip it's important to keep the SoC IO domain - * higher than (or equal to) the external voltage. That means we need - * to change it before external voltage changes happen in the case - * of an increase. - * - * Note that in the "pre" change we pick the max possible voltage that - * the regulator might end up at (the client requests a range and we - * don't know for certain the exact voltage). Right now we rely on the - * slop in MAX_VOLTAGE_1_8 and MAX_VOLTAGE_3_3 to save us if clients - * request something like a max of 3.6V when they really want 3.3V. - * We could attempt to come up with better rules if this fails. - */ - if (event & REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) { - struct pre_voltage_change_data *pvc_data = data; - - uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV); - } else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE | - REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) { - uV = (unsigned long)data; - } else { - return NOTIFY_OK; - } - - dev_dbg(supply->iod->dev, "Setting to %d\n", uV); - - if (uV > MAX_VOLTAGE_3_3) { - dev_err(supply->iod->dev, "Voltage too high: %d\n", uV); - - if (event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) - return NOTIFY_BAD; - } - - ret = rockchip_iodomain_write(supply, uV); - if (ret && event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE) - return NOTIFY_BAD; - - dev_dbg(supply->iod->dev, "Setting to %d done\n", uV); - return NOTIFY_OK; -} - -static void px30_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no VCCIO6 supply we should leave things alone */ - if (!iod->supplies[PX30_IO_VSEL_VCCIO6_SUPPLY_NUM].reg) - return; - - /* - * set vccio6 iodomain to also use this framework - * instead of a special gpio. - */ - val = PX30_IO_VSEL_VCCIO6_SRC | (PX30_IO_VSEL_VCCIO6_SRC << 16); - ret = regmap_write(iod->grf, PX30_IO_VSEL, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update vccio6 ctrl\n"); -} - -static void rk3288_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no flash supply we should leave things alone */ - if (!iod->supplies[RK3288_SOC_FLASH_SUPPLY_NUM].reg) - return; - - /* - * set flash0 iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3288_SOC_CON2_FLASH0 | (RK3288_SOC_CON2_FLASH0 << 16); - ret = regmap_write(iod->grf, RK3288_SOC_CON2, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update flash0 ctrl\n"); -} - -static void rk3328_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no vccio2 supply we should leave things alone */ - if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg) - return; - - /* - * set vccio2 iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16); - ret = regmap_write(iod->grf, RK3328_SOC_CON4, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n"); -} - -static void rk3368_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no flash supply we should leave things alone */ - if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg) - return; - - /* - * set flash0 iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3368_SOC_CON15_FLASH0 | (RK3368_SOC_CON15_FLASH0 << 16); - ret = regmap_write(iod->grf, RK3368_SOC_CON15, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update flash0 ctrl\n"); -} - -static void rk3399_pmu_iodomain_init(struct rockchip_iodomain *iod) -{ - int ret; - u32 val; - - /* if no pmu io supply we should leave things alone */ - if (!iod->supplies[RK3399_PMUGRF_VSEL_SUPPLY_NUM].reg) - return; - - /* - * set pmu io iodomain to also use this framework - * instead of a special gpio. - */ - val = RK3399_PMUGRF_CON0_VSEL | (RK3399_PMUGRF_CON0_VSEL << 16); - ret = regmap_write(iod->grf, RK3399_PMUGRF_CON0, val); - if (ret < 0) - dev_warn(iod->dev, "couldn't update pmu io iodomain ctrl\n"); -} - -static const struct rockchip_iodomain_soc_data soc_data_px30 = { - .grf_offset = 0x180, - .supply_names = { - NULL, - "vccio6", - "vccio1", - "vccio2", - "vccio3", - "vccio4", - "vccio5", - "vccio-oscgpi", - }, - .init = px30_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_px30_pmu = { - .grf_offset = 0x100, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "pmuio1", - "pmuio2", - }, -}; - -/* - * On the rk3188 the io-domains are handled by a shared register with the - * lower 8 bits being still being continuing drive-strength settings. - */ -static const struct rockchip_iodomain_soc_data soc_data_rk3188 = { - .grf_offset = 0x104, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "ap0", - "ap1", - "cif", - "flash", - "vccio0", - "vccio1", - "lcdc0", - "lcdc1", - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3228 = { - .grf_offset = 0x418, - .supply_names = { - "vccio1", - "vccio2", - "vccio3", - "vccio4", - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3288 = { - .grf_offset = 0x380, - .supply_names = { - "lcdc", /* LCDC_VDD */ - "dvp", /* DVPIO_VDD */ - "flash0", /* FLASH0_VDD (emmc) */ - "flash1", /* FLASH1_VDD (sdio1) */ - "wifi", /* APIO3_VDD (sdio0) */ - "bb", /* APIO5_VDD */ - "audio", /* APIO4_VDD */ - "sdcard", /* SDMMC0_VDD (sdmmc) */ - "gpio30", /* APIO1_VDD */ - "gpio1830", /* APIO2_VDD */ - }, - .init = rk3288_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3328 = { - .grf_offset = 0x410, - .supply_names = { - "vccio1", - "vccio2", - "vccio3", - "vccio4", - "vccio5", - "vccio6", - "pmuio", - }, - .init = rk3328_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3368 = { - .grf_offset = 0x900, - .supply_names = { - NULL, /* reserved */ - "dvp", /* DVPIO_VDD */ - "flash0", /* FLASH0_VDD (emmc) */ - "wifi", /* APIO2_VDD (sdio0) */ - NULL, - "audio", /* APIO3_VDD */ - "sdcard", /* SDMMC0_VDD (sdmmc) */ - "gpio30", /* APIO1_VDD */ - "gpio1830", /* APIO4_VDD (gpujtag) */ - }, - .init = rk3368_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3368_pmu = { - .grf_offset = 0x100, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - "pmu", /*PMU IO domain*/ - "vop", /*LCDC IO domain*/ - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3399 = { - .grf_offset = 0xe640, - .supply_names = { - "bt656", /* APIO2_VDD */ - "audio", /* APIO5_VDD */ - "sdmmc", /* SDMMC0_VDD */ - "gpio1830", /* APIO4_VDD */ - }, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = { - .grf_offset = 0x180, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "pmu1830", /* PMUIO2_VDD */ - }, - .init = rk3399_pmu_iodomain_init, -}; - -static const struct rockchip_iodomain_soc_data soc_data_rv1108 = { - .grf_offset = 0x404, - .supply_names = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "vccio1", - "vccio2", - "vccio3", - "vccio5", - "vccio6", - }, - -}; - -static const struct rockchip_iodomain_soc_data soc_data_rv1108_pmu = { - .grf_offset = 0x104, - .supply_names = { - "pmu", - }, -}; - -static const struct of_device_id rockchip_iodomain_match[] = { - { - .compatible = "rockchip,px30-io-voltage-domain", - .data = (void *)&soc_data_px30 - }, - { - .compatible = "rockchip,px30-pmu-io-voltage-domain", - .data = (void *)&soc_data_px30_pmu - }, - { - .compatible = "rockchip,rk3188-io-voltage-domain", - .data = &soc_data_rk3188 - }, - { - .compatible = "rockchip,rk3228-io-voltage-domain", - .data = &soc_data_rk3228 - }, - { - .compatible = "rockchip,rk3288-io-voltage-domain", - .data = &soc_data_rk3288 - }, - { - .compatible = "rockchip,rk3328-io-voltage-domain", - .data = &soc_data_rk3328 - }, - { - .compatible = "rockchip,rk3368-io-voltage-domain", - .data = &soc_data_rk3368 - }, - { - .compatible = "rockchip,rk3368-pmu-io-voltage-domain", - .data = &soc_data_rk3368_pmu - }, - { - .compatible = "rockchip,rk3399-io-voltage-domain", - .data = &soc_data_rk3399 - }, - { - .compatible = "rockchip,rk3399-pmu-io-voltage-domain", - .data = &soc_data_rk3399_pmu - }, - { - .compatible = "rockchip,rv1108-io-voltage-domain", - .data = &soc_data_rv1108 - }, - { - .compatible = "rockchip,rv1108-pmu-io-voltage-domain", - .data = &soc_data_rv1108_pmu - }, - { /* sentinel */ }, -}; -MODULE_DEVICE_TABLE(of, rockchip_iodomain_match); - -static int rockchip_iodomain_probe(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - const struct of_device_id *match; - struct rockchip_iodomain *iod; - struct device *parent; - int i, ret = 0; - - if (!np) - return -ENODEV; - - iod = devm_kzalloc(&pdev->dev, sizeof(*iod), GFP_KERNEL); - if (!iod) - return -ENOMEM; - - iod->dev = &pdev->dev; - platform_set_drvdata(pdev, iod); - - match = of_match_node(rockchip_iodomain_match, np); - iod->soc_data = match->data; - - parent = pdev->dev.parent; - if (parent && parent->of_node) { - iod->grf = syscon_node_to_regmap(parent->of_node); - } else { - dev_dbg(&pdev->dev, "falling back to old binding\n"); - iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); - } - - if (IS_ERR(iod->grf)) { - dev_err(&pdev->dev, "couldn't find grf regmap\n"); - return PTR_ERR(iod->grf); - } - - for (i = 0; i < MAX_SUPPLIES; i++) { - const char *supply_name = iod->soc_data->supply_names[i]; - struct rockchip_iodomain_supply *supply = &iod->supplies[i]; - struct regulator *reg; - int uV; - - if (!supply_name) - continue; - - reg = devm_regulator_get_optional(iod->dev, supply_name); - if (IS_ERR(reg)) { - ret = PTR_ERR(reg); - - /* If a supply wasn't specified, that's OK */ - if (ret == -ENODEV) - continue; - else if (ret != -EPROBE_DEFER) - dev_err(iod->dev, "couldn't get regulator %s\n", - supply_name); - goto unreg_notify; - } - - /* set initial correct value */ - uV = regulator_get_voltage(reg); - - /* must be a regulator we can get the voltage of */ - if (uV < 0) { - dev_err(iod->dev, "Can't determine voltage: %s\n", - supply_name); - goto unreg_notify; - } - - if (uV > MAX_VOLTAGE_3_3) { - dev_crit(iod->dev, - "%d uV is too high. May damage SoC!\n", - uV); - ret = -EINVAL; - goto unreg_notify; - } - - /* setup our supply */ - supply->idx = i; - supply->iod = iod; - supply->reg = reg; - supply->nb.notifier_call = rockchip_iodomain_notify; - - ret = rockchip_iodomain_write(supply, uV); - if (ret) { - supply->reg = NULL; - goto unreg_notify; - } - - /* register regulator notifier */ - ret = regulator_register_notifier(reg, &supply->nb); - if (ret) { - dev_err(&pdev->dev, - "regulator notifier request failed\n"); - supply->reg = NULL; - goto unreg_notify; - } - } - - if (iod->soc_data->init) - iod->soc_data->init(iod); - - return 0; - -unreg_notify: - for (i = MAX_SUPPLIES - 1; i >= 0; i--) { - struct rockchip_iodomain_supply *io_supply = &iod->supplies[i]; - - if (io_supply->reg) - regulator_unregister_notifier(io_supply->reg, - &io_supply->nb); - } - - return ret; -} - -static int rockchip_iodomain_remove(struct platform_device *pdev) -{ - struct rockchip_iodomain *iod = platform_get_drvdata(pdev); - int i; - - for (i = MAX_SUPPLIES - 1; i >= 0; i--) { - struct rockchip_iodomain_supply *io_supply = &iod->supplies[i]; - - if (io_supply->reg) - regulator_unregister_notifier(io_supply->reg, - &io_supply->nb); - } - - return 0; -} - -static struct platform_driver rockchip_iodomain_driver = { - .probe = rockchip_iodomain_probe, - .remove = rockchip_iodomain_remove, - .driver = { - .name = "rockchip-iodomain", - .of_match_table = rockchip_iodomain_match, - }, -}; - -module_platform_driver(rockchip_iodomain_driver); - -MODULE_DESCRIPTION("Rockchip IO-domain driver"); -MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); -MODULE_AUTHOR("Doug Anderson <dianders@chromium.org>"); -MODULE_LICENSE("GPL v2"); |