Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933307AbdDEKJU (ORCPT ); Wed, 5 Apr 2017 06:09:20 -0400 Received: from mx0b-001ae601.pphosted.com ([67.231.152.168]:37543 "EHLO mx0b-001ae601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755114AbdDEKIX (ORCPT ); Wed, 5 Apr 2017 06:08:23 -0400 Authentication-Results: ppops.net; spf=none smtp.mailfrom=rf@opensource.wolfsonmicro.com From: Richard Fitzgerald To: , , , , , , CC: , , , , Subject: [PATCH 10/16] gpio: madera: Support Cirrus Logic Madera class codecs Date: Wed, 5 Apr 2017 11:07:58 +0100 Message-ID: <1491386884-30689-11-git-send-email-rf@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1491386884-30689-1-git-send-email-rf@opensource.wolfsonmicro.com> References: <1491386884-30689-1-git-send-email-rf@opensource.wolfsonmicro.com> MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1702020001 definitions=main-1704050089 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8343 Lines: 275 This adds support for the GPIOs on Cirrus Logic Madera class codecs. Signed-off-by: Nariman Poushin Signed-off-by: Richard Fitzgerald Signed-off-by: Charles Keepax --- .../devicetree/bindings/gpio/gpio-madera.txt | 24 +++ MAINTAINERS | 2 + drivers/gpio/Kconfig | 6 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-madera.c | 173 +++++++++++++++++++++ 5 files changed, 206 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-madera.txt create mode 100644 drivers/gpio/gpio-madera.c diff --git a/Documentation/devicetree/bindings/gpio/gpio-madera.txt b/Documentation/devicetree/bindings/gpio/gpio-madera.txt new file mode 100644 index 0000000..eb01c6d --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-madera.txt @@ -0,0 +1,24 @@ +Cirrus Logic Madera class audio codecs gpio driver + +This is a subnode of the parent mfd node. + +See also the core bindings for the parent MFD driver: +See Documentation/devicetree/bindings/mfd/madera.txt + +Required properties: + - compatible : must be "cirrus,madera-gpio" + - gpio-controller : Indicates this device is a GPIO controller. + - #gpio-cells : Must be 2. The first cell is the pin number. The second cell + is reserved for future use and must be zero + +Example: + +codec: cs47l85@0 { + compatible = "cirrus,cs47l85"; + + gpio { + compatible = "cirrus,madera-gpio"; + gpio-controller; + #gpio-cells = <2>; + } +}; diff --git a/MAINTAINERS b/MAINTAINERS index 85af1f9..0183692 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3266,6 +3266,7 @@ L: patches@opensource.wolfsonmicro.com T: git https://github.com/CirrusLogic/linux-drivers.git W: https://github.com/CirrusLogic/linux-drivers/wiki S: Supported +F: Documentation/devicetree/bindings/gpio/gpio-madera.txt F: Documentation/devicetree/bindings/interrupt-controller/cirrus,madera.txt F: Documentation/devicetree/bindings/mfd/madera.txt F: Documentation/devicetree/bindings/pinctrl/cirrus,madera-pinctrl.txt @@ -3273,6 +3274,7 @@ F: Documentation/devicetree/bindings/regulator/madera* F: include/linux/irqchip/irq-madera* F: include/linux/mfd/madera/* F: include/linux/regulator/madera* +F: drivers/gpio/gpio-madera* F: drivers/irqchip/irq-madera* F: drivers/mfd/madera* F: drivers/mfd/cs47l* diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 63ceed2..1386728 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -844,6 +844,12 @@ config GPIO_ARIZONA help Support for GPIOs on Wolfson Arizona class devices. +config GPIO_MADERA + tristate "Cirrus Logic Madera class codecs" + depends on MFD_MADERA + help + Support for GPIOs on Cirrus Logic Madera class codecs. + config GPIO_CRYSTAL_COVE tristate "GPIO support for Crystal Cove PMIC" depends on (X86 || COMPILE_TEST) && INTEL_SOC_PMIC diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 095598e..d4b6c30 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_GPIO_LPC18XX) += gpio-lpc18xx.o obj-$(CONFIG_ARCH_LPC32XX) += gpio-lpc32xx.o obj-$(CONFIG_GPIO_LP873X) += gpio-lp873x.o obj-$(CONFIG_GPIO_LYNXPOINT) += gpio-lynxpoint.o +obj-$(CONFIG_GPIO_MADERA) += gpio-madera.o obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o obj-$(CONFIG_GPIO_MAX7301) += gpio-max7301.o diff --git a/drivers/gpio/gpio-madera.c b/drivers/gpio/gpio-madera.c new file mode 100644 index 0000000..b4fa082 --- /dev/null +++ b/drivers/gpio/gpio-madera.c @@ -0,0 +1,173 @@ +/* + * gpio-madera.c - GPIO support for Cirrus Logic Madera codecs + * + * Copyright 2015-2017 Cirrus Logic + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include + +#include +#include +#include + +struct madera_gpio { + struct madera *madera; + struct gpio_chip gpio_chip; +}; + +static int madera_gpio_direction_in(struct gpio_chip *chip, unsigned int offset) +{ + struct madera_gpio *madera_gpio = gpiochip_get_data(chip); + struct madera *madera = madera_gpio->madera; + + return regmap_update_bits(madera->regmap, + MADERA_GPIO1_CTRL_2 + (2 * offset), + MADERA_GP1_DIR_MASK, MADERA_GP1_DIR); +} + +static int madera_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct madera_gpio *madera_gpio = gpiochip_get_data(chip); + struct madera *madera = madera_gpio->madera; + unsigned int val; + int ret; + + ret = regmap_read(madera->regmap, + MADERA_GPIO1_CTRL_1 + (2 * offset), &val); + if (ret < 0) + return ret; + + if (val & MADERA_GP1_LVL_MASK) + return 1; + else + return 0; +} + +static int madera_gpio_direction_out(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct madera_gpio *madera_gpio = gpiochip_get_data(chip); + struct madera *madera = madera_gpio->madera; + unsigned int regval; + int ret; + + if (value) + regval = MADERA_GP1_LVL; + else + regval = 0; + + ret = regmap_update_bits(madera->regmap, + MADERA_GPIO1_CTRL_2 + (2 * offset), + MADERA_GP1_DIR_MASK, 0); + if (ret < 0) + return ret; + + return regmap_update_bits(madera->regmap, + MADERA_GPIO1_CTRL_1 + (2 * offset), + MADERA_GP1_LVL_MASK, regval); +} + +static void madera_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + struct madera_gpio *madera_gpio = gpiochip_get_data(chip); + struct madera *madera = madera_gpio->madera; + unsigned int regval; + int ret; + + if (value) + regval = MADERA_GP1_LVL; + else + regval = 0; + + ret = regmap_update_bits(madera->regmap, + MADERA_GPIO1_CTRL_1 + (2 * offset), + MADERA_GP1_LVL_MASK, regval); + if (ret) + dev_warn(madera->dev, "Failed to write to 0x%x (%d)\n", + MADERA_GPIO1_CTRL_1 + (2 * offset), ret); +} + +static struct gpio_chip template_chip = { + .label = "madera", + .owner = THIS_MODULE, + .direction_input = madera_gpio_direction_in, + .get = madera_gpio_get, + .direction_output = madera_gpio_direction_out, + .set = madera_gpio_set, + .can_sleep = true, +}; + +static int madera_gpio_probe(struct platform_device *pdev) +{ + struct madera *madera = dev_get_drvdata(pdev->dev.parent); + struct madera_pdata *pdata = dev_get_platdata(madera->dev); + struct madera_gpio *madera_gpio; + int ret; + + madera_gpio = devm_kzalloc(&pdev->dev, sizeof(*madera_gpio), + GFP_KERNEL); + if (!madera_gpio) + return -ENOMEM; + + madera_gpio->madera = madera; + madera_gpio->gpio_chip = template_chip; + madera_gpio->gpio_chip.parent = &pdev->dev; + + if (IS_ENABLED(CONFIG_OF_GPIO)) + madera_gpio->gpio_chip.of_node = pdev->dev.of_node; + + switch (madera->type) { + case CS47L35: + madera_gpio->gpio_chip.ngpio = CS47L35_NUM_GPIOS; + break; + case CS47L85: + case WM1840: + madera_gpio->gpio_chip.ngpio = CS47L85_NUM_GPIOS; + break; + case CS47L90: + case CS47L91: + madera_gpio->gpio_chip.ngpio = CS47L90_NUM_GPIOS; + break; + default: + dev_err(&pdev->dev, "Unknown chip variant %d\n", + madera->type); + return -EINVAL; + } + + if (pdata && pdata->gpio_base) + madera_gpio->gpio_chip.base = pdata->gpio_base; + else + madera_gpio->gpio_chip.base = -1; + + ret = devm_gpiochip_add_data(&pdev->dev, &madera_gpio->gpio_chip, + madera_gpio); + if (ret < 0) { + dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); + return ret; + } + + return 0; +} + +static struct platform_driver madera_gpio_driver = { + .driver.name = "madera-gpio", + .driver.owner = THIS_MODULE, + .probe = madera_gpio_probe, +}; + +module_platform_driver(madera_gpio_driver); + +MODULE_DESCRIPTION("GPIO interface for Madera codecs"); +MODULE_AUTHOR("Nariman Poushin "); +MODULE_AUTHOR("Richard Fitzgerald "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:madera-gpio"); -- 1.9.1