linaro-kernel November 2011

linaro-kernel@lists.linaro.org

15 participants
34 discussions

[Activity] (Niklas Hernaeus) 2011-11-14 - 2011-11-20

by Niklas Hernaeus

== Niklas Hernaeus <nhe> == === General activity === * Uart works for dt, but not quite as it is supposed to. Need to add dt to a general uart file. * Preparing DT report for Knowledge sharing session. 40% done. * Presented Linaro Connect report for STE Competence group. === Plans === * Make detailed plans for the work items. * Make the dt uarts work as it is supposed to. * Start work on dt i2c. * Also, MMC must be included in the blueprints, somewhere at the top, below i2c. * Preparing a Linaro collaboration tools session. (irc, mumble, etherpad, blueprints, rypple) 20% done. Date and form not set.

14 years

[Activity] (Niklas Hernaeus) 2011-11-14 - 2011-11-20

by Niklas Hernaeus

14 years

[ACTIVITY] (Shawn Guo) Week of Nov 14

by Shawn Guo

=== Device Tree === * Reviewed Grant's clock DT binding series * Converted imx6 clock code to Mike's pre-v3 common-clk series and device tree binding. (a big RFC patch) * Suggested change '#clock-cells' design to make the users a little bit easier === Consolidation and cleanup === * Tested rmk's restart work for mxs * Tested Sascha's mx5-merge series on imx6q, imx53 and imx51. With this series, we can build single zImage for imx3, imx5 and imx6. === Misc === * Collected fixing patches for imx6 and mxs, and sent them to Arnd for next -rc. === Plan === * Post mc13892 regulator DT patches based on Rajendra's series v5 -- Regards, Shawn

14 years

[ACTIVITY] (Deepak Saxena) Nov 13th - 20th

by Deepak Saxena

=== Highlights === (Out sick thursday and friday, so a slow week overall) * Wrote very high-level kernel process overview to be used by TBD kernel maintainer to drive the details: https://wiki.linaro.org/Internal/Process/TipBasedLinaroKernel * Helped with review of Paul McKenney's "FOSS Howto" document * Released 11.11 kernel * Worked on roadmap cards: https://linaro-public.papyrs.com/public/6178/KWG2011-DRIVER-VALIDATION https://linaro-public.papyrs.com/public/6172/KWG2011-UFS-SUPPORT https://linaro-public.papyrs.com/public/5630/KWG2011-STRESS-TESTING/ === Plans === * Release 11.11 kernel * Finish creating new blueprints * Work with Mounir on finishing cleaning out old blueprints from 11.05 and 11.11 cycle * Find all my receipts and do expenses for ELC + LC * Continue creation of new roadmap cards === Travel/Time Off === * US Turkey Eating Holiday this Thursday and Friday, half day off Wed. * Linaro holiday: Dec 26 - Jan 2

14 years

[ACTIVITY] (Thomas Abraham) 2011-11-14 - 2011-11-17

by Thomas Abraham

== Thomas Abraham <thomas-ab> == === Highlights === * Submitted initial version of gpio/pin-ctrl/pin-mux driver for internal review. * Working on device tree support for i2s driver. === Plans === * Complete the device tree support for i2s driver. === Misc === * Leave on 18th (Friday) and 21st (Monday) November.

14 years

ACTIVITY (Venkatraman S) Nov 13 - 19

by Venkatraman S

== Venkatraman S (svenkatr) == Was off partly due to TI internal activities. == Highlights == * Understand requirements for eMMC4.5 implementation - studying specifications * Review patches on Packed CMD implementation on mmc mailing list * Testing of patches for preventing merges across erase block sizes for low-end flash devices == Plans == * Test and post patches for the above activity * Continue study of eMMC4.5 features and UFS Regards, Venkat

14 years

[ACTIVITY] (John Stultz) Nov 14-18th

by john stultz

Was out sick weds, so not a super productive week. === Highlights === * Added EARLYSUSPEND to linaro+android defconfigs * Made final 11.11 linaro+android release * After being nudged by Thomas, sent out first draft of a large patchset reworking some of the timekeeping locking. * Reviewed and acked sched_clock overflow fix. * Helped with Android Image testing for 11.11 release * Submitted config fragment management script to akpm and it was included into the -mm tree. * Revised madvise volatile patchset a few times preping for lkml discussion. Got some good feedback that made me think it would be better to rework the patch to use fadvise instead of madvise. Started efforts to convert the interface over. === Plans === * Finish madvise->fadvise conversion, do one last cleanup and send to lkml. * Take another pass at the timekeeping locking for Thomas. * Push queued patches for 3.3 to Thomas. === Issues === * None

14 years

[Activity] (Linus Walleij) 2011-11-12 - 2011-11-18

by Linus Walleij

== Linus Walleij linusw == === Highlights === * Very active discussions around the pinctrl v2 patch sent sent out last week, much good feedback and slowly building consensus. https://blueprints.launchpad.net/linux-linaro/+spec/pinctrl-pinprops-2011.11 * Refactored U300 GPIO to live in pinctrl as sibling to the U300 pinmux controller. Also implemented pin multiplexing and draft pin configuration interface (subject to change). This was done as a proof-of-concept that the pincontrol subsystem is good for something that exists out there. Will be sent out back-to-back with the pinconfig patch set. * Harvesting some fixes for pinctrl * Looked after the GPIO subsystem -rc fixes for Grant but haven't seen many patches, discussed a few non-rc patches. * A lot of discussion around the PL022 driver thread safety, led to the submission of the patch entitled: "spi/pl022: make the chip deselect handling thread safe" * Lots of mailing and reading trying to understand how to get my kernel.org git repo back online. === Plans === * Drive generalization of Nomadik GPIO by using the pinctrl framework. drivers/gpio/gpio-nomadik.c * Test the PL08x patches on the Ericsson Research PB11MPCore and submit platform data for using pl08x DMA on that platform. * Pushed out the AB8500 HWMON driver, will try to address review comments. * Look into other Ux500 stuff in need of mainlining... === Issues === * Pretty much internal fuzz at my parent company due to re- organization. Thanks, Linus Walleij

14 years

ACTIVITY (Rajendra Nayak) Nov 14 - Nov 18

by Rajendra Nayak

== Rajendra Nayak <rnayak> == === Highlights === * Posted an early RFC version of the omap pinmux driver. Working on improving it by adding missing pieces and based on review comments from Tony/Linus. * Posted omap serial dt support. Reworked to handle some shortcomings in the hmwod framework. Still, has missing low power (PM) support, which is currently implemented using platform func pointers. Need to work on a solution as people seem to dislike auxdata approach as its ugly. * Posted v5 of regulator core bindings. TWL regulator support still has dependencies on other (i2c/gpio/twl) OMAP dt patches. * Reworking TWL-smps support patches, based on the latest ones (post ELC discussions of Tero with Kevin/Benoit) sent across by Tero Kristo. === Plans === * Work on further improving the omap pinmux driver and add support for all OMAPs. * Rework any OMAP driver DT support patches.

14 years

[PATCH] pinctrl: add a gpio and pinctrl driver for samsung io-pad controllers

by Thomas Abraham

Add a combined gpio and pinctrl io-pad driver for Samsung platforms. Signed-off-by: Thomas Abraham <thomas.abraham(a)linaro.org> --- This driver supports gpio, pinctrl and pinmux functionality. At present, all the possible pin groups and pin functions have not been added. This driver is designed to be reusable across all Samsung SoC's and when this implemtation is complete, the gpio driver in driver/gpio for samsung platforms can be phased out. Features like GPIO interrupt support and pin-config support are yet to be added. drivers/pinctrl/Kconfig | 6 + drivers/pinctrl/Makefile | 1 + drivers/pinctrl/pinctrl-samsung.c | 688 +++++++++++++++++++++++++++++++++++++ 3 files changed, 695 insertions(+), 0 deletions(-) create mode 100644 drivers/pinctrl/pinctrl-samsung.c diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index e17e2f8..55739d2 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -30,6 +30,12 @@ config PINMUX_U300 depends on ARCH_U300 select PINMUX +config PINCTRL_SAMSUNG + bool "Samsung pinctrl driver" + default y + depends on PLAT_SAMSUNG + select PINMUX + endmenu endif diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index bdc548a..463b934 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -6,3 +6,4 @@ obj-$(CONFIG_PINCTRL) += core.o obj-$(CONFIG_PINMUX) += pinmux.o obj-$(CONFIG_PINMUX_SIRF) += pinmux-sirf.o obj-$(CONFIG_PINMUX_U300) += pinmux-u300.o +obj-$(CONFIG_PINCTRL_SAMSUNG) += pinctrl-samsung.o diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c new file mode 100644 index 0000000..0705a8d --- /dev/null +++ b/drivers/pinctrl/pinctrl-samsung.c @@ -0,0 +1,688 @@ +/* + * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's. + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * Copyright (c) 2011 Linaro Ltd + * http://www.linaro.org + * + * Author: Thomas Abraham <thomas.abraham(a)linaro.org> + * + * This driver is divided into two main components, gpiolib subsystem interface + * and the pin-controller subsystem interface. This model help to better + * abstract the details of pad controller for all the Samsung SoC's. The driver + * is reusuable on all the Samsung SoC's, though the data that could get + * accumulated in this file could be daunting. + * + * The driver functions are kept as generic as possible such that they are + * usable across multiple Samsung SoC's. The driver data differentiates the + * operation of the driver for each SoC by describing the complete + * pad-controller structure to the driver and the generic driver code operates + * on the SoC specific driver data. The driver data also includes runtime data + * required for the operation of the driver. + * + * List of ToDo's: + * 1. Add GPIO Interrupt support. + * 2. Add external interrupt (wakeup) support. + * 3 Add power management support. + * 4 Add pin-config (pull up/down, driver strength) support. + * 5. Find a better way to populate data about pins and functions. + * 6. Add driver data, pins, groups, functions for all Samsung SoC's and test. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/gpio.h> + +#include <plat/map-base.h> +#include <plat/map-s5p.h> + +#define DAT_REG 0x4 + +/** + * struct samsung_pin_bank: represent a controller pin-bank. + * @reg_offset: starting offset of the pin-bank registers. + * @pin_base: starting pin number of the bank. + * @nr_pins: number of pins included in this bank. + * @func_width: width of the function selector bit field. + * @irq_base: starting eint number of the bank. + */ +struct samsung_pin_bank { + unsigned int reg_offset; + unsigned int pin_base; + unsigned int nr_pins; + unsigned int func_width; + unsigned int irq_base; +}; + +/** + * struct samsung_pin_ctrl: represent a pin controller. + * @pin_banks: list of pin banks included in this controller. + * @nr_banks: number of pin banks. + * @base: starting system wide pin number. + * @nr_pins: number of pins supported by the controller. + * @label: for debug information. + */ +struct samsung_pin_ctrl { + struct samsung_pin_bank *pin_banks; + unsigned int nr_banks; + unsigned int base; + unsigned int nr_pins; + char *label; +}; + +/** + * struct samsung_pinctrl_drv_data: wrapper for holding driver data together. + * @virt_base: register base address of the controller. + * @ctrl: pin controller instance managed by the driver. + * @pctl: pin controller descriptor registered with the pinctrl subsystem. + * @pctl_dev: cookie representing pinctrl device instance. + * @pin_groups: list of pin groups available to the driver. + * @nr_groups: number of such pin groups. + * @pmx_functions: list of pin functions available to the driver. + * @nr_function: number of such pin functions. + * @gc: gpio_chip instance registered with gpiolib. + */ +struct samsung_pinctrl_drv_data { + void __iomem *virt_base; + struct samsung_pin_ctrl *ctrl; + struct pinctrl_desc *pctl; + struct pinctrl_dev *pctl_dev; + const struct samsung_pin_group *pin_groups; + unsigned int nr_groups; + const struct samsung_pmx_func *pmx_functions; + unsigned int nr_functions; + struct gpio_chip *gc; +}; + +/** + * struct samsung_pin_group: represent group of pins of a pinmux function. + * @name: name of the pin group, used to lookup the group. + * @pins: the pins included in this group. + * @num_pins: number of pins included in this group. + * @func: the function number to be programmed when selected. + */ +struct samsung_pin_group { + const char *name; + const unsigned int *pins; + const unsigned int num_pins; + unsigned int func; +}; + +/** + * struct samsung_pmx_func: represent a pin function. + * @name: name of the pin function, used to lookup the function. + * @groups: one or more names of pin groups that provide this function. + * @num_groups: number of groups included in @groups. + */ +struct samsung_pmx_func { + const char *name; + const char * const *groups; + const unsigned num_groups; +}; + +/* Note: The pin group list needs to be further populated */ +static unsigned int exynos4210_spi0_pins[] = { + EXYNOS4_GPB(0), EXYNOS4_GPB(1), EXYNOS4_GPB(2), EXYNOS4_GPB(3), +}; + +static unsigned int exynos4210_i2c0_pins[] = { + EXYNOS4_GPD1(0), EXYNOS4_GPD1(1), +}; + +static unsigned int exynos4210_sdhci0_pins[] = { + EXYNOS4_GPK0(0), EXYNOS4_GPK0(1), EXYNOS4_GPK0(2), EXYNOS4_GPK0(3), + EXYNOS4_GPK0(4), EXYNOS4_GPK0(5), EXYNOS4_GPK0(6), EXYNOS4_GPK0(7) +}; + +static unsigned int exynos4210_sdhci2_pins[] = { + EXYNOS4_GPK2(0), EXYNOS4_GPK2(1), EXYNOS4_GPK2(2), EXYNOS4_GPK2(3), + EXYNOS4_GPK2(4), EXYNOS4_GPK2(5), EXYNOS4_GPK2(6), EXYNOS4_GPK2(7) +}; + +static unsigned int exynos4210_i2s0_pins[] = { + EXYNOS4_GPZ(0), EXYNOS4_GPZ(1), EXYNOS4_GPZ(2), EXYNOS4_GPZ(3), + EXYNOS4_GPZ(4), EXYNOS4_GPZ(5), EXYNOS4_GPZ(6), EXYNOS4_GPZ(7) +}; + +static unsigned int exynos4210_pcm0_pins[] = { + EXYNOS4_GPZ(0), EXYNOS4_GPZ(1), EXYNOS4_GPZ(2), EXYNOS4_GPZ(3), + EXYNOS4_GPZ(4), EXYNOS4_GPZ(5), +}; + +#define PIN_GROUP(n, p, f) \ + { \ + .name = n, \ + .pins = p, \ + .num_pins = ARRAY_SIZE(p), \ + .func = f \ + } + +/* + * list of pin groups available for pin-controller[0] of Exynos4210. + * Note: This listed needs to be populated. + */ +static const struct samsung_pin_group exynos4210_pin_groups0[] = { + PIN_GROUP("spi0_grp", exynos4210_spi0_pins, 2), + PIN_GROUP("i2c0_grp", exynos4210_i2c0_pins, 2), +}; + +/* + * list of pin groups available for pin-controller[1] of Exynos4210. + * Note: This listed needs to be populated. + */ +static const struct samsung_pin_group exynos4210_pin_groups1[] = { + PIN_GROUP("sdhci0_grp", exynos4210_sdhci0_pins, 2), + PIN_GROUP("sdhci2_grp", exynos4210_sdhci2_pins, 2), +}; + +/* + * list of pin groups available for pin-controller[2] of Exynos4210. + * Note: This listed needs to be populated. + */ +static const struct samsung_pin_group exynos4210_pin_groups2[] = { + PIN_GROUP("i2s0_grp", exynos4210_i2s0_pins, 2), + PIN_GROUP("pcm0_grp", exynos4210_pcm0_pins, 2), +}; + +/* check if the selector is a valid pin group selector */ +static int samsung_list_groups(struct pinctrl_dev *pctldev, unsigned selector) +{ + struct samsung_pinctrl_drv_data *drvdata; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + if (selector >= drvdata->nr_groups) + return -EINVAL; + return 0; +} + +/* return the name of the group selected by the group selector */ +static const char *samsung_get_group_name(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct samsung_pinctrl_drv_data *drvdata; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + return drvdata->pin_groups[selector].name; +} + +/* return the pin numbers associated with the specified group */ +static int samsung_get_group_pins(struct pinctrl_dev *pctldev, + unsigned selector, const unsigned **pins, unsigned *num_pins) +{ + struct samsung_pinctrl_drv_data *drvdata; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + *pins = drvdata->pin_groups[selector].pins; + *num_pins = drvdata->pin_groups[selector].num_pins; + return 0; +} + +/* list of pinctrl callbacks for the pinctrl core */ +static struct pinctrl_ops samsung_pctrl_ops = { + .list_groups = samsung_list_groups, + .get_group_name = samsung_get_group_name, + .get_group_pins = samsung_get_group_pins, +}; + +static const char * const i2c0_grp[] = { "i2c0_grp" }; +static const char * const spi0_grp[] = { "spi0_grp" }; +static const char * const sdhci0_grp[] = { "sdhci0_grp" }; +static const char * const sdhci2_grp[] = { "sdhci2_grp" }; +static const char * const i2s0_grp[] = { "i2s0_grp" }; +static const char * const pcm0_grp[] = { "pcm0_grp" }; + +#define PMX_FUNC(n, g) \ + { \ + .name = n, \ + .groups = g, \ + .num_groups = ARRAY_SIZE(g), \ + } + +/* + * list of function names supported by the pinmux vertical. + * Note: All functions to be populated here. + */ +static const struct samsung_pmx_func exynos4210_pmx_functions0[] = { + PMX_FUNC("spi0", spi0_grp), + PMX_FUNC("i2c0", i2c0_grp), +}; + +/* + * list of function names supported by the pinmux vertical. + * Note: All functions to be populated here. + */ +static const struct samsung_pmx_func exynos4210_pmx_functions1[] = { + PMX_FUNC("sdhci0", sdhci0_grp), + PMX_FUNC("sdhci2", sdhci2_grp), +}; + +/* + * list of function names supported by the pinmux vertical. + * Note: All functions to be populated here. + */ +static const struct samsung_pmx_func exynos4210_pmx_functions2[] = { + PMX_FUNC("i2s0", i2s0_grp), + PMX_FUNC("pcm0", pcm0_grp), +}; + +/* check if the selector is a valid pin function selector */ +static int samsung_pinmux_list_funcs(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct samsung_pinctrl_drv_data *drvdata; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + if (selector >= drvdata->nr_groups) + return -EINVAL; + return 0; +} + +/* return the name of the pin function specified */ +static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct samsung_pinctrl_drv_data *drvdata; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + return drvdata->pmx_functions[selector].name; +} + +/* return the groups associated for the specified function selector */ +static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev, + unsigned selector, const char * const **groups, + unsigned * const num_groups) +{ + struct samsung_pinctrl_drv_data *drvdata; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + *groups = drvdata->pmx_functions[selector].groups; + *num_groups = drvdata->pmx_functions[selector].num_groups; + return 0; +} + +/* + * given a pin number that is local to a pin controller, find out the pin bank + * and the register base of the pin bank. + */ +static void pin_to_reg_bank(struct gpio_chip *gc, unsigned pin, + void __iomem **reg, unsigned long *offset, + struct samsung_pin_bank **bank) +{ + struct samsung_pinctrl_drv_data *drvdata; + struct samsung_pin_bank *b; + + drvdata = dev_get_drvdata(gc->dev); + b = drvdata->ctrl->pin_banks; + + while (b->pin_base + b->nr_pins < pin) + b++; + + *reg = drvdata->virt_base + b->reg_offset; + *offset = pin - b->pin_base; + if (bank) + *bank = b; + + /* some banks have two config registers in a single bank */ + if (*offset * b->func_width > BITS_PER_LONG) + *reg += 4; +} + +/* enable or disable a pinmux function */ +static void samsung_pimux_setup(struct pinctrl_dev *pctldev, unsigned selector, + unsigned group, bool enable) +{ + struct samsung_pinctrl_drv_data *drvdata; + const unsigned int *pin; + unsigned long data, pin_offset, cnt; + struct samsung_pin_bank *bank; + void __iomem *reg; + unsigned int mask, shift; + + drvdata = pinctrl_dev_get_drvdata(pctldev); + pin = drvdata->pin_groups[group].pins; + + /* + * for each pin in the pin group selected, program the correspoding pin + * pin function number in the config register. + */ + for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++, pin++) { + pin_to_reg_bank(drvdata->gc, *pin - drvdata->ctrl->base, + &reg, &pin_offset, &bank); + mask = (1 << bank->func_width) - 1; + shift = pin_offset * bank->func_width; + + data = readl(reg); + data &= ~(mask << shift); + if (enable) + data |= drvdata->pin_groups[group].func << shift; + writel(data, reg); + } +} + +/* enable a specified pinmux by writing to registers */ +static int samsung_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector, + unsigned group) +{ + samsung_pimux_setup(pctldev, selector, group, true); + return 0; +} + +/* disable a specified pinmux by writing to registers */ +static void samsung_pinmux_disable(struct pinctrl_dev *pctldev, + unsigned selector, unsigned group) +{ + samsung_pimux_setup(pctldev, selector, group, false); +} + +/* list of pinmux callbacks for the pinmux vertical in pinctrl core */ +static struct pinmux_ops samsung_pinmux_ops = { + .list_functions = samsung_pinmux_list_funcs, + .get_function_name = samsung_pinmux_get_fname, + .get_function_groups = samsung_pinmux_get_groups, + .enable = samsung_pinmux_enable, + .disable = samsung_pinmux_disable, +}; + +/* gpiolib gpio_set callback function */ +static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value) +{ + void __iomem *reg; + unsigned long pin_offset, data; + + pin_to_reg_bank(gc, offset, &reg, &pin_offset, NULL); + data = readl(reg + DAT_REG); + data &= ~(1 << pin_offset); + if (value) + data |= 1 << pin_offset; + __raw_writel(data, reg + DAT_REG); +} + +/* gpiolib gpio_get callback function */ +static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset) +{ + void __iomem *reg; + unsigned long pin_offset, data; + + pin_to_reg_bank(gc, offset, &reg, &pin_offset, NULL); + data = readl(reg + DAT_REG); + data >>= pin_offset; + data &= 1; + return data; +} + +/* register the pinctrl interface with the pinctrl subsystem */ +static int __init samsung_pinctrl_register(struct platform_device *pdev, + struct samsung_pinctrl_drv_data *drvdata) +{ + struct pinctrl_desc *ctrldesc = drvdata->pctl; + struct pinctrl_pin_desc *pindesc; + int pin; + + pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) * + drvdata->ctrl->nr_pins, GFP_KERNEL); + if (!pindesc) { + dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n"); + return -ENOMEM; + } + ctrldesc->pins = pindesc; + ctrldesc->npins = drvdata->ctrl->nr_pins; + ctrldesc->maxpin = drvdata->ctrl->nr_pins; + + /* dynamically create the pindesc, ignore the name for pindesc */ + for (pin = 0; pin < ctrldesc->maxpin; pin++, pindesc++) + pindesc->number = pin + drvdata->ctrl->base; + + drvdata->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, drvdata); + if (!drvdata->pctl_dev) { + dev_err(&pdev->dev, "could not register pinctrl driver\n"); + return -EINVAL; + } + + return 0; +} + +/* register the gpiolib interface with the gpiolib subsystem */ +static int __init samsung_gpiolib_register(struct platform_device *pdev, + struct samsung_pinctrl_drv_data *drvdata) +{ + struct gpio_chip *gc; + int ret; + + gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL); + if (!gc) { + dev_err(&pdev->dev, "mem alloc for gpio_chip failed\n"); + return -ENOMEM; + } + + drvdata->gc = gc; + gc->base = drvdata->ctrl->base; + gc->ngpio = drvdata->ctrl->nr_pins; + gc->dev = &pdev->dev; + gc->set = samsung_gpio_set; + gc->get = samsung_gpio_get; + gc->label = drvdata->ctrl->label; + gc->owner = THIS_MODULE; + ret = gpiochip_add(gc); + if (ret) { + dev_err(&pdev->dev, "failed to register gpio_chip %s, error " + "code: %d\n", gc->label, ret); + return ret; + } + + return 0; +} + +static int __devinit samsung_pinctrl_probe(struct platform_device *pdev) +{ + struct samsung_pinctrl_drv_data *drvdata; + struct resource *res; + int ret; + + drvdata = (struct samsung_pinctrl_drv_data *) + platform_get_device_id(pdev)->driver_data + (pdev->id); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "cannot find IO resource\n"); + return -ENOENT; + } + + res = request_mem_region(res->start, resource_size(res), + pdev->name); + if (!res) { + dev_err(&pdev->dev, "request for mem region failed\n"); + return -EBUSY; + } + + drvdata->virt_base = ioremap(res->start, resource_size(res)); + if (!drvdata->virt_base) { + dev_err(&pdev->dev, "ioremap failed\n"); + return -EINVAL; + } + + ret = samsung_gpiolib_register(pdev, drvdata); + if (ret) + return ret; + + ret = samsung_pinctrl_register(pdev, drvdata); + if (ret) + return ret; + + platform_set_drvdata(pdev, drvdata); + return 0; +} + +/* driver data for various samsung soc's */ +#ifdef CONFIG_CPU_EXYNOS4210 + +#define EXYNOS4_PIN_BANK(offset, __gpio) \ + { \ + .reg_offset = offset, \ + .pin_base = (__gpio##_START), \ + .nr_pins = (__gpio##_NR), \ + .func_width = 4, \ + } + +/* pin banks of pin-controller 0 */ +static struct samsung_pin_bank exynos4210_pin_banks0[] = { + EXYNOS4_PIN_BANK(0x000, EXYNOS4_GPIO_A0), + EXYNOS4_PIN_BANK(0x020, EXYNOS4_GPIO_A1), + EXYNOS4_PIN_BANK(0x040, EXYNOS4_GPIO_B), + EXYNOS4_PIN_BANK(0x060, EXYNOS4_GPIO_C0), + EXYNOS4_PIN_BANK(0x080, EXYNOS4_GPIO_C1), + EXYNOS4_PIN_BANK(0x0A0, EXYNOS4_GPIO_D0), + EXYNOS4_PIN_BANK(0x0C0, EXYNOS4_GPIO_D1), + EXYNOS4_PIN_BANK(0x0E0, EXYNOS4_GPIO_E0), + EXYNOS4_PIN_BANK(0x100, EXYNOS4_GPIO_E1), + EXYNOS4_PIN_BANK(0x120, EXYNOS4_GPIO_E2), + EXYNOS4_PIN_BANK(0x140, EXYNOS4_GPIO_E3), + EXYNOS4_PIN_BANK(0x160, EXYNOS4_GPIO_E4), + EXYNOS4_PIN_BANK(0x180, EXYNOS4_GPIO_F0), + EXYNOS4_PIN_BANK(0x1A0, EXYNOS4_GPIO_F1), + EXYNOS4_PIN_BANK(0x1C0, EXYNOS4_GPIO_F2), + EXYNOS4_PIN_BANK(0x1E0, EXYNOS4_GPIO_F3), +}; + +#define EXYNOS4_PIN_BANK1(offset, __gpio) \ + { \ + .reg_offset = offset, \ + .pin_base = (__gpio##_START) - EXYNOS4_GPIO_J0_START,\ + .nr_pins = (__gpio##_NR), \ + .func_width = 4, \ + } + +/* pin banks of pin-controller 1 */ +static struct samsung_pin_bank exynos4210_pin_banks1[] = { + EXYNOS4_PIN_BANK1(0x000, EXYNOS4_GPIO_J0), + EXYNOS4_PIN_BANK1(0x020, EXYNOS4_GPIO_J1), + EXYNOS4_PIN_BANK1(0x040, EXYNOS4_GPIO_K0), + EXYNOS4_PIN_BANK1(0x060, EXYNOS4_GPIO_K1), + EXYNOS4_PIN_BANK1(0x080, EXYNOS4_GPIO_K2), + EXYNOS4_PIN_BANK1(0x0A0, EXYNOS4_GPIO_K3), + EXYNOS4_PIN_BANK1(0x0C0, EXYNOS4_GPIO_L0), + EXYNOS4_PIN_BANK1(0x0E0, EXYNOS4_GPIO_L1), + EXYNOS4_PIN_BANK1(0x100, EXYNOS4_GPIO_L2), + EXYNOS4_PIN_BANK1(0x120, EXYNOS4_GPIO_Y0), + EXYNOS4_PIN_BANK1(0x140, EXYNOS4_GPIO_Y1), + EXYNOS4_PIN_BANK1(0x160, EXYNOS4_GPIO_Y2), + EXYNOS4_PIN_BANK1(0x180, EXYNOS4_GPIO_Y3), + EXYNOS4_PIN_BANK1(0x1A0, EXYNOS4_GPIO_Y4), + EXYNOS4_PIN_BANK1(0x1C0, EXYNOS4_GPIO_Y5), + EXYNOS4_PIN_BANK1(0x1E0, EXYNOS4_GPIO_Y6), + EXYNOS4_PIN_BANK1(0xC00, EXYNOS4_GPIO_X0), + EXYNOS4_PIN_BANK1(0xC20, EXYNOS4_GPIO_X1), + EXYNOS4_PIN_BANK1(0xC40, EXYNOS4_GPIO_X2), + EXYNOS4_PIN_BANK1(0xC60, EXYNOS4_GPIO_X3), +}; + +#define EXYNOS4_PIN_BANK2(offset, __gpio) \ + { \ + .reg_offset = offset, \ + .pin_base = (__gpio##_START) - EXYNOS4_GPIO_Z_START,\ + .nr_pins = (__gpio##_NR), \ + .func_width = 4, \ + } + +/* pin banks of pin-controller 2 */ +static struct samsung_pin_bank exynos4210_pin_banks2[] = { + EXYNOS4_PIN_BANK2(0x000, EXYNOS4_GPIO_Z), +}; + +static struct samsung_pinctrl_drv_data exynos4210_pinctrl_drv_data[] = { + { + /* pin-controller instance 0 data */ + .ctrl = &(struct samsung_pin_ctrl) { + .pin_banks = exynos4210_pin_banks0, + .nr_banks = ARRAY_SIZE(exynos4210_pin_banks0), + .base = EXYNOS4_GPIO_A0_START, + .nr_pins = EXYNOS4_GPIO_J0_START - 1, + .label = "exynos4210-gpio-ctrl0", + }, + .pctl = &(struct pinctrl_desc) { + .name = "exynos4210_pinctrl", + .pctlops = &samsung_pctrl_ops, + .pmxops = &samsung_pinmux_ops, + .owner = THIS_MODULE, + }, + .pin_groups = exynos4210_pin_groups0, + .nr_groups = ARRAY_SIZE(exynos4210_pin_groups0), + .pmx_functions = exynos4210_pmx_functions0, + .nr_functions = ARRAY_SIZE(exynos4210_pmx_functions0), + }, { + /* pin-controller instance 1 data */ + .ctrl = &(struct samsung_pin_ctrl) { + .pin_banks = exynos4210_pin_banks1, + .nr_banks = ARRAY_SIZE(exynos4210_pin_banks1), + .base = EXYNOS4_GPIO_J0_START, + .nr_pins = EXYNOS4_GPIO_Z_START - + EXYNOS4_GPIO_J0_START, + .label = "exynos4210-gpio-ctrl1", + }, + .pctl = &(struct pinctrl_desc) { + .name = "exynos4210_pinctrl", + .pctlops = &samsung_pctrl_ops, + .pmxops = &samsung_pinmux_ops, + .owner = THIS_MODULE, + }, + .pin_groups = exynos4210_pin_groups1, + .nr_groups = ARRAY_SIZE(exynos4210_pin_groups1), + .pmx_functions = exynos4210_pmx_functions1, + .nr_functions = ARRAY_SIZE(exynos4210_pmx_functions1), + }, { + /* pin-controller instance 2 data */ + .ctrl = &(struct samsung_pin_ctrl) { + .pin_banks = exynos4210_pin_banks2, + .nr_banks = ARRAY_SIZE(exynos4210_pin_banks2), + .base = EXYNOS4_GPIO_Z_START, + .nr_pins = EXYNOS4_GPIO_Z_NR, + .label = "exynos4210-gpio-ctrl2", + }, + .pctl = &(struct pinctrl_desc) { + .name = "exynos4210_pinctrl", + .pctlops = &samsung_pctrl_ops, + .pmxops = &samsung_pinmux_ops, + .owner = THIS_MODULE, + }, + .pin_groups = exynos4210_pin_groups2, + .nr_groups = ARRAY_SIZE(exynos4210_pin_groups2), + .pmx_functions = exynos4210_pmx_functions2, + .nr_functions = ARRAY_SIZE(exynos4210_pmx_functions2), + }, +}; +#define EXYNOS4210_PCTRL_DRVDATA ((kernel_ulong_t)&exynos4210_pinctrl_drv_data) +#else +#define EXYNOS4210_PCTRL_DRVDATA (kernel_ulong_t)NULL +#endif /* CONFIG_CPU_EXYNOS4210 */ + +static struct platform_device_id samsung_pinctrl_driver_ids[] = { + { + .name = "exynos4-pinctrl", + .driver_data = EXYNOS4210_PCTRL_DRVDATA, + }, +}; + +static struct platform_driver samsung_pinctrl_driver = { + .probe = samsung_pinctrl_probe, + .id_table = samsung_pinctrl_driver_ids, + .driver = { + .name = "samsung-pinctrl", + .owner = THIS_MODULE, + }, +}; + +static int __init samsung_pinctrl_drv_register(void) +{ + return platform_driver_register(&samsung_pinctrl_driver); +} +postcore_initcall(samsung_pinctrl_drv_register); -- 1.6.6.rc2

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linaro-kernel November 2011