The avs drivers are all SoC specific drivers that doesn't share any code.
Instead they are located in a directory, mostly to keep similar
functionality together. From a maintenance point of view, it makes better
sense to collect SoC specific drivers like these, into the SoC specific
directories.
Therefore, let's move the rockchip-io driver to the rockchip directory.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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.
# 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
+++ /dev/null
-// 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");
In a lot of cases there also need to be default settings initialized
to make some of them conform to expectations of the kernel.
+config ROCKCHIP_IODOMAIN
+ tristate "Rockchip IO domain support"
+ depends on 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.
+
config ROCKCHIP_PM_DOMAINS
bool "Rockchip generic power domain"
depends on PM
# Rockchip Soc drivers
#
obj-$(CONFIG_ROCKCHIP_GRF) += grf.o
+obj-$(CONFIG_ROCKCHIP_IODOMAIN) += io-domain.o
obj-$(CONFIG_ROCKCHIP_PM_DOMAINS) += pm_domains.o
--- /dev/null
+// 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");
projects / linux.git / commitdiff