diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-13 15:02:27 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-13 15:02:27 -0700 |
commit | 43c95d3694cc448fdf50bd53b7ff3a5bb4655883 (patch) | |
tree | ac0824a8f733286b2609046830aa0af2fbf9471a /drivers | |
parent | 073c916bc00571d8662b89a294eba265481b6fbb (diff) | |
parent | 4c105769bf6de29856bf80a4045e6725301c58ce (diff) |
Merge tag 'pinctrl-v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control updates from Linus Walleij:
"This is the bulk of pin control changes for the v5.3 kernel cycle:
Core changes:
- Device links can optionally be added between a pin control producer
and its consumers. This will affect how the system power management
is handled: a pin controller will not suspend before all of its
consumers have been suspended.
This was necessary for the ST Microelectronics STMFX expander and
need to be tested on other systems as well: it makes sense to make
this default in the long run.
Right now it is opt-in per driver.
- Drive strength can be specified in microamps. With decreases in
silicon technology, milliamps isn't granular enough, let's make it
possible to select drive strengths in microamps.
Right now the Meson (AMlogic) driver needs this.
New drivers:
- New subdriver for the Tegra 194 SoC.
- New subdriver for the Qualcomm SDM845.
- New subdriver for the Qualcomm SM8150.
- New subdriver for the Freescale i.MX8MN (Freescale is now a product
line of NXP).
- New subdriver for Marvell MV98DX1135.
Driver improvements:
- The Bitmain BM1880 driver now supports pin config in addition to
muxing.
- The Qualcomm drivers can now reserve some GPIOs as taken aside and
not usable for users. This is used in ACPI systems to take out some
GPIO lines used by the BIOS so that noone else (neither kernel nor
userspace) will play with them by mistake and crash the machine.
- A slew of refurbishing around the Aspeed drivers (board management
controllers for servers) in preparation for the new Aspeed AST2600
SoC.
- A slew of improvements over the SH PFC drivers as usual.
- Misc cleanups and fixes"
* tag 'pinctrl-v5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (106 commits)
pinctrl: aspeed: Strip moved macros and structs from private header
pinctrl: aspeed: Fix missed include
pinctrl: baytrail: Use GENMASK() consistently
pinctrl: baytrail: Re-use data structures from pinctrl-intel.h
pinctrl: baytrail: Use defined macro instead of magic in byt_get_gpio_mux()
pinctrl: qcom: Add SM8150 pinctrl driver
dt-bindings: pinctrl: qcom: Add SM8150 pinctrl binding
dt-bindings: pinctrl: qcom: Document missing gpio nodes
pinctrl: aspeed: Add implementation-related documentation
pinctrl: aspeed: Split out pinmux from general pinctrl
pinctrl: aspeed: Clarify comment about strapping W1C
pinctrl: aspeed: Correct comment that is no longer true
MAINTAINERS: Add entry for ASPEED pinctrl drivers
dt-bindings: pinctrl: aspeed: Convert AST2500 bindings to json-schema
dt-bindings: pinctrl: aspeed: Convert AST2400 bindings to json-schema
dt-bindings: pinctrl: aspeed: Split bindings document in two
pinctrl: qcom: Add irq_enable callback for msm gpio
pinctrl: madera: Fixup SPDX headers
pinctrl: qcom: sdm845: Fix CONFIG preprocessor guard
pinctrl: tegra: Add bitmask support for parked bits
...
Diffstat (limited to 'drivers')
73 files changed, 6056 insertions, 2739 deletions
diff --git a/drivers/pinctrl/aspeed/Makefile b/drivers/pinctrl/aspeed/Makefile index 068729bf4f86..ea8962645e49 100644 --- a/drivers/pinctrl/aspeed/Makefile +++ b/drivers/pinctrl/aspeed/Makefile @@ -2,6 +2,6 @@ # Aspeed pinctrl support ccflags-y += $(call cc-option,-Woverride-init) -obj-$(CONFIG_PINCTRL_ASPEED) += pinctrl-aspeed.o +obj-$(CONFIG_PINCTRL_ASPEED) += pinctrl-aspeed.o pinmux-aspeed.o obj-$(CONFIG_PINCTRL_ASPEED_G4) += pinctrl-aspeed-g4.o obj-$(CONFIG_PINCTRL_ASPEED_G5) += pinctrl-aspeed-g5.o diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c index 73e2c9c0e549..384396cbb22d 100644 --- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g4.c @@ -18,9 +18,35 @@ #include "../core.h" #include "../pinctrl-utils.h" +#include "pinmux-aspeed.h" #include "pinctrl-aspeed.h" /* + * The "Multi-function Pins Mapping and Control" table in the SoC datasheet + * references registers by the device/offset mnemonic. The register macros + * below are named the same way to ease transcription and verification (as + * opposed to naming them e.g. PINMUX_CTRL_[0-9]). Further, signal expressions + * reference registers beyond those dedicated to pinmux, such as the system + * reset control and MAC clock configuration registers. + */ +#define SCU2C 0x2C /* Misc. Control Register */ +#define SCU3C 0x3C /* System Reset Control/Status Register */ +#define SCU48 0x48 /* MAC Interface Clock Delay Setting */ +#define HW_STRAP1 0x70 /* AST2400 strapping is 33 bits, is split */ +#define HW_REVISION_ID 0x7C /* Silicon revision ID register */ +#define SCU80 0x80 /* Multi-function Pin Control #1 */ +#define SCU84 0x84 /* Multi-function Pin Control #2 */ +#define SCU88 0x88 /* Multi-function Pin Control #3 */ +#define SCU8C 0x8C /* Multi-function Pin Control #4 */ +#define SCU90 0x90 /* Multi-function Pin Control #5 */ +#define SCU94 0x94 /* Multi-function Pin Control #6 */ +#define SCUA0 0xA0 /* Multi-function Pin Control #7 */ +#define SCUA4 0xA4 /* Multi-function Pin Control #8 */ +#define SCUA8 0xA8 /* Multi-function Pin Control #9 */ +#define SCUAC 0xAC /* Multi-function Pin Control #10 */ +#define HW_STRAP2 0xD0 /* Strapping */ + +/* * Uses undefined macros for symbol naming and references, eg GPIOA0, MAC1LINK, * TIMER3 etc. * @@ -2386,13 +2412,73 @@ static const struct aspeed_pin_config aspeed_g4_configs[] = { { PIN_CONFIG_INPUT_DEBOUNCE, { C14, B14 }, SCUA8, 27 }, }; +static int aspeed_g4_sig_expr_set(const struct aspeed_pinmux_data *ctx, + const struct aspeed_sig_expr *expr, + bool enable) +{ + int ret; + int i; + + for (i = 0; i < expr->ndescs; i++) { + const struct aspeed_sig_desc *desc = &expr->descs[i]; + u32 pattern = enable ? desc->enable : desc->disable; + u32 val = (pattern << __ffs(desc->mask)); + + if (!ctx->maps[desc->ip]) + return -ENODEV; + + /* + * Strap registers are configured in hardware or by early-boot + * firmware. Treat them as read-only despite that we can write + * them. This may mean that certain functions cannot be + * deconfigured and is the reason we re-evaluate after writing + * all descriptor bits. + * + * Port D and port E GPIO loopback modes are the only exception + * as those are commonly used with front-panel buttons to allow + * normal operation of the host when the BMC is powered off or + * fails to boot. Once the BMC has booted, the loopback mode + * must be disabled for the BMC to control host power-on and + * reset. + */ + if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP1 && + !(desc->mask & (BIT(21) | BIT(22)))) + continue; + + if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP2) + continue; + + ret = regmap_update_bits(ctx->maps[desc->ip], desc->reg, + desc->mask, val); + + if (ret) + return ret; + } + + ret = aspeed_sig_expr_eval(ctx, expr, enable); + if (ret < 0) + return ret; + + if (!ret) + return -EPERM; + + return 0; +} + +static const struct aspeed_pinmux_ops aspeed_g4_ops = { + .set = aspeed_g4_sig_expr_set, +}; + static struct aspeed_pinctrl_data aspeed_g4_pinctrl_data = { .pins = aspeed_g4_pins, .npins = ARRAY_SIZE(aspeed_g4_pins), - .groups = aspeed_g4_groups, - .ngroups = ARRAY_SIZE(aspeed_g4_groups), - .functions = aspeed_g4_functions, - .nfunctions = ARRAY_SIZE(aspeed_g4_functions), + .pinmux = { + .ops = &aspeed_g4_ops, + .groups = aspeed_g4_groups, + .ngroups = ARRAY_SIZE(aspeed_g4_groups), + .functions = aspeed_g4_functions, + .nfunctions = ARRAY_SIZE(aspeed_g4_functions), + }, .configs = aspeed_g4_configs, .nconfigs = ARRAY_SIZE(aspeed_g4_configs), }; diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c b/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c index aa7e148b38bb..053101f795a2 100644 --- a/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed-g5.c @@ -21,6 +21,32 @@ #include "../pinctrl-utils.h" #include "pinctrl-aspeed.h" +/* + * The "Multi-function Pins Mapping and Control" table in the SoC datasheet + * references registers by the device/offset mnemonic. The register macros + * below are named the same way to ease transcription and verification (as + * opposed to naming them e.g. PINMUX_CTRL_[0-9]). Further, signal expressions + * reference registers beyond those dedicated to pinmux, such as the system + * reset control and MAC clock configuration registers. The AST2500 goes a step + * further and references registers in the graphics IP block. + */ +#define SCU2C 0x2C /* Misc. Control Register */ +#define SCU3C 0x3C /* System Reset Control/Status Register */ +#define SCU48 0x48 /* MAC Interface Clock Delay Setting */ +#define HW_STRAP1 0x70 /* AST2400 strapping is 33 bits, is split */ +#define HW_REVISION_ID 0x7C /* Silicon revision ID register */ +#define SCU80 0x80 /* Multi-function Pin Control #1 */ +#define SCU84 0x84 /* Multi-function Pin Control #2 */ +#define SCU88 0x88 /* Multi-function Pin Control #3 */ +#define SCU8C 0x8C /* Multi-function Pin Control #4 */ +#define SCU90 0x90 /* Multi-function Pin Control #5 */ +#define SCU94 0x94 /* Multi-function Pin Control #6 */ +#define SCUA0 0xA0 /* Multi-function Pin Control #7 */ +#define SCUA4 0xA4 /* Multi-function Pin Control #8 */ +#define SCUA8 0xA8 /* Multi-function Pin Control #9 */ +#define SCUAC 0xAC /* Multi-function Pin Control #10 */ +#define HW_STRAP2 0xD0 /* Strapping */ + #define ASPEED_G5_NR_PINS 236 #define COND1 { ASPEED_IP_SCU, SCU90, BIT(6), 0, 0 } @@ -573,6 +599,8 @@ SS_PIN_DECL(N3, GPIOJ2, SGPMO); SIG_EXPR_LIST_DECL_SINGLE(SGPMI, SGPM, SIG_DESC_SET(SCU84, 11)); SS_PIN_DECL(N4, GPIOJ3, SGPMI); +FUNC_GROUP_DECL(SGPM, R2, L2, N3, N4); + #define N5 76 SIG_EXPR_LIST_DECL_SINGLE(VGAHS, VGAHS, SIG_DESC_SET(SCU84, 12)); SIG_EXPR_LIST_DECL_SINGLE(DASHN5, DASHN5, SIG_DESC_SET(SCU94, 8)); @@ -2123,6 +2151,7 @@ static const struct aspeed_pin_group aspeed_g5_groups[] = { ASPEED_PINCTRL_GROUP(SD2), ASPEED_PINCTRL_GROUP(SDA1), ASPEED_PINCTRL_GROUP(SDA2), + ASPEED_PINCTRL_GROUP(SGPM), ASPEED_PINCTRL_GROUP(SGPS1), ASPEED_PINCTRL_GROUP(SGPS2), ASPEED_PINCTRL_GROUP(SIOONCTRL), @@ -2292,6 +2321,7 @@ static const struct aspeed_pin_function aspeed_g5_functions[] = { ASPEED_PINCTRL_FUNC(SD2), ASPEED_PINCTRL_FUNC(SDA1), ASPEED_PINCTRL_FUNC(SDA2), + ASPEED_PINCTRL_FUNC(SGPM), ASPEED_PINCTRL_FUNC(SGPS1), ASPEED_PINCTRL_FUNC(SGPS2), ASPEED_PINCTRL_FUNC(SIOONCTRL), @@ -2477,13 +2507,98 @@ static struct aspeed_pin_config aspeed_g5_configs[] = { { PIN_CONFIG_INPUT_DEBOUNCE, { A20, B19 }, SCUA8, 27 }, }; +/** + * Configure a pin's signal by applying an expression's descriptor state for + * all descriptors in the expression. + * + * @ctx: The pinmux context + * @expr: The expression associated with the function whose signal is to be + * configured + * @enable: true to enable an function's signal through a pin's signal + * expression, false to disable the function's signal + * + * Return: 0 if the expression is configured as requested and a negative error + * code otherwise + */ +static int aspeed_g5_sig_expr_set(const struct aspeed_pinmux_data *ctx, + const struct aspeed_sig_expr *expr, + bool enable) +{ + int ret; + int i; + + for (i = 0; i < expr->ndescs; i++) { + const struct aspeed_sig_desc *desc = &expr->descs[i]; + u32 pattern = enable ? desc->enable : desc->disable; + u32 val = (pattern << __ffs(desc->mask)); + + if (!ctx->maps[desc->ip]) + return -ENODEV; + + /* + * Strap registers are configured in hardware or by early-boot + * firmware. Treat them as read-only despite that we can write + * them. This may mean that certain functions cannot be + * deconfigured and is the reason we re-evaluate after writing + * all descriptor bits. + * + * Port D and port E GPIO loopback modes are the only exception + * as those are commonly used with front-panel buttons to allow + * normal operation of the host when the BMC is powered off or + * fails to boot. Once the BMC has booted, the loopback mode + * must be disabled for the BMC to control host power-on and + * reset. + */ + if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP1 && + !(desc->mask & (BIT(21) | BIT(22)))) + continue; + + if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP2) + continue; + + /* On AST2500, Set bits in SCU70 are cleared from SCU7C */ + if (desc->ip == ASPEED_IP_SCU && desc->reg == HW_STRAP1) { + u32 value = ~val & desc->mask; + + if (value) { + ret = regmap_write(ctx->maps[desc->ip], + HW_REVISION_ID, value); + if (ret < 0) + return ret; + } + } + + ret = regmap_update_bits(ctx->maps[desc->ip], desc->reg, + desc->mask, val); + + if (ret) + return ret; + } + + ret = aspeed_sig_expr_eval(ctx, expr, enable); + if (ret < 0) + return ret; + + if (!ret) + return -EPERM; + + return 0; +} + +static const struct aspeed_pinmux_ops aspeed_g5_ops = { + .set = aspeed_g5_sig_expr_set, +}; + static struct aspeed_pinctrl_data aspeed_g5_pinctrl_data = { .pins = aspeed_g5_pins, .npins = ARRAY_SIZE(aspeed_g5_pins), - .groups = aspeed_g5_groups, - .ngroups = ARRAY_SIZE(aspeed_g5_groups), - .functions = aspeed_g5_functions, - .nfunctions = ARRAY_SIZE(aspeed_g5_functions), + .pinmux = { + .ops = &aspeed_g5_ops, + .groups = aspeed_g5_groups, + .ngroups = ARRAY_SIZE(aspeed_g5_groups), + .functions = aspeed_g5_functions, + .nfunctions = ARRAY_SIZE(aspeed_g5_functions), + }, .configs = aspeed_g5_configs, .nconfigs = ARRAY_SIZE(aspeed_g5_configs), }; @@ -2539,7 +2654,7 @@ static int aspeed_g5_pinctrl_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "No GFX phandle found, some mux configurations may fail\n"); map = NULL; } - aspeed_g5_pinctrl_data.maps[ASPEED_IP_GFX] = map; + aspeed_g5_pinctrl_data.pinmux.maps[ASPEED_IP_GFX] = map; node = of_parse_phandle(pdev->dev.of_node, "aspeed,external-nodes", 1); if (node) { @@ -2553,7 +2668,7 @@ static int aspeed_g5_pinctrl_probe(struct platform_device *pdev) map = NULL; } of_node_put(node); - aspeed_g5_pinctrl_data.maps[ASPEED_IP_LPC] = map; + aspeed_g5_pinctrl_data.pinmux.maps[ASPEED_IP_LPC] = map; return aspeed_pinctrl_probe(pdev, &aspeed_g5_pinctrl_desc, &aspeed_g5_pinctrl_data); diff --git a/drivers/pinctrl/aspeed/pinctrl-aspeed.c b/drivers/pinctrl/aspeed/pinctrl-aspeed.c index 4c775b8ffdc4..535db3de490b 100644 --- a/drivers/pinctrl/aspeed/pinctrl-aspeed.c +++ b/drivers/pinctrl/aspeed/pinctrl-aspeed.c @@ -10,17 +10,11 @@ #include "../core.h" #include "pinctrl-aspeed.h" -static const char *const aspeed_pinmux_ips[] = { - [ASPEED_IP_SCU] = "SCU", - [ASPEED_IP_GFX] = "GFX", - [ASPEED_IP_LPC] = "LPC", -}; - int aspeed_pinctrl_get_groups_count(struct pinctrl_dev *pctldev) { struct aspeed_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev); - return pdata->ngroups; + return pdata->pinmux.ngroups; } const char *aspeed_pinctrl_get_group_name(struct pinctrl_dev *pctldev, @@ -28,7 +22,7 @@ const char *aspeed_pinctrl_get_group_name(struct pinctrl_dev *pctldev, { struct aspeed_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev); - return pdata->groups[group].name; + return pdata->pinmux.groups[group].name; } int aspeed_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, @@ -37,8 +31,8 @@ int aspeed_pinctrl_get_group_pins(struct pinctrl_dev *pctldev, { struct aspeed_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev); - *pins = &pdata->groups[group].pins[0]; - *npins = pdata->groups[group].npins; + *pins = &pdata->pinmux.groups[group].pins[0]; + *npins = pdata->pinmux.groups[group].npins; return 0; } @@ -53,7 +47,7 @@ int aspeed_pinmux_get_fn_count(struct pinctrl_dev *pctldev) { struct aspeed_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev); - return pdata->nfunctions; + return pdata->pinmux.nfunctions; } const char *aspeed_pinmux_get_fn_name(struct pinctrl_dev *pctldev, @@ -61,7 +55,7 @@ const char *aspeed_pinmux_get_fn_name(struct pinctrl_dev *pctldev, { struct aspeed_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev); - return pdata->functions[function].name; + return pdata->pinmux.functions[function].name; } int aspeed_pinmux_get_fn_groups(struct pinctrl_dev *pctldev, @@ -71,208 +65,38 @@ int aspeed_pinmux_get_fn_groups(struct pinctrl_dev *pctldev, { struct aspeed_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev); - *groups = pdata->functions[function].groups; - *num_groups = pdata->functions[function].ngroups; + *groups = pdata->pinmux.functions[function].groups; + *num_groups = pdata->pinmux.functions[function].ngroups; return 0; } -static inline void aspeed_sig_desc_print_val( - const struct aspeed_sig_desc *desc, bool enable, u32 rv) -{ - pr_debug("Want %s%X[0x%08X]=0x%X, got 0x%X from 0x%08X\n", - aspeed_pinmux_ips[desc->ip], desc->reg, - desc->mask, enable ? desc->enable : desc->disable, - (rv & desc->mask) >> __ffs(desc->mask), rv); -} - -/** - * Query the enabled or disabled state of a signal descriptor - * - * @desc: The signal descriptor of interest - * @enabled: True to query the enabled state, false to query disabled state - * @map: The IP block's regmap instance - * - * Return: 1 if the descriptor's bitfield is configured to the state - * selected by @enabled, 0 if not, and less than zero if an unrecoverable - * failure occurred - * - * Evaluation of descriptor state is non-trivial in that it is not a binary - * outcome: The bitfields can be greater than one bit in size and thus can take - * |