From patchwork Fri Nov 19 21:37:23 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Gardiner X-Patchwork-Id: 341101 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oAJLccjl021731 for ; Fri, 19 Nov 2010 21:38:53 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757110Ab0KSVhl (ORCPT ); Fri, 19 Nov 2010 16:37:41 -0500 Received: from na3sys009aog110.obsmtp.com ([74.125.149.203]:57474 "HELO na3sys009aog110.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1757091Ab0KSVhj (ORCPT ); Fri, 19 Nov 2010 16:37:39 -0500 Received: from source ([74.125.83.54]) by na3sys009aob110.postini.com ([74.125.148.12]) with SMTP ID DSNKTObuIgK+wvPUQjaUXETjWqLhTqHdJ3RF@postini.com; Fri, 19 Nov 2010 13:37:39 PST Received: by gwj20 with SMTP id 20so3209194gwj.27 for ; Fri, 19 Nov 2010 13:37:38 -0800 (PST) Received: by 10.90.11.15 with SMTP id 15mr1835270agk.41.1290202658141; Fri, 19 Nov 2010 13:37:38 -0800 (PST) Received: from localhost.localdomain ([206.191.47.130]) by mx.google.com with ESMTPS id g6sm2261015anh.31.2010.11.19.13.37.34 (version=TLSv1/SSLv3 cipher=RC4-MD5); Fri, 19 Nov 2010 13:37:37 -0800 (PST) From: Ben Gardiner To: Kevin Hilman , davinci-linux-open-source@linux.davincidsp.com, linux-input@vger.kernel.org, Dmitry Torokhov Cc: linux-kernel@vger.kernel.org, Chris Cordahi , Paul Mundt , Sekhar Nori , "Govindarajan, Sriramakrishnan" Subject: [PATCH v3 4/4] da850-evm: add baseboard GPIO expander buttons, switches and LEDs Date: Fri, 19 Nov 2010 16:37:23 -0500 Message-Id: <784b0a3281316ff90ecd3d52d224bbba1dd4ddb9.1290201713.git.bengardiner@nanometrics.ca> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: References: Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Fri, 19 Nov 2010 21:38:54 +0000 (UTC) diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index c689e7e..32c7a02 100644 --- a/arch/arm/mach-davinci/board-da850-evm.c +++ b/arch/arm/mach-davinci/board-da850-evm.c @@ -431,6 +431,220 @@ static int da850_evm_ui_expander_teardown(struct i2c_client *client, return 0; } +/* assign the baseboard expander's GPIOs after the UI board's */ +#define DA850_UI_EXPANDER_N_GPIOS ARRAY_SIZE(da850_evm_ui_exp) +#define DA850_BB_EXPANDER_GPIO_BASE (DAVINCI_N_GPIO + DA850_UI_EXPANDER_N_GPIOS) + +enum da850_evm_bb_exp_pins { + DA850_EVM_BB_EXP_DEEP_SLEEP_EN = 0, + DA850_EVM_BB_EXP_SW_RST, + DA850_EVM_BB_EXP_TP_23, + DA850_EVM_BB_EXP_TP_22, + DA850_EVM_BB_EXP_TP_21, + DA850_EVM_BB_EXP_USER_PB1, + DA850_EVM_BB_EXP_USER_LED2, + DA850_EVM_BB_EXP_USER_LED1, + DA850_EVM_BB_EXP_USER_SW1, + DA850_EVM_BB_EXP_USER_SW2, + DA850_EVM_BB_EXP_USER_SW3, + DA850_EVM_BB_EXP_USER_SW4, + DA850_EVM_BB_EXP_USER_SW5, + DA850_EVM_BB_EXP_USER_SW6, + DA850_EVM_BB_EXP_USER_SW7, + DA850_EVM_BB_EXP_USER_SW8 +}; + +static const char const *da850_evm_bb_exp[] = { + [DA850_EVM_BB_EXP_DEEP_SLEEP_EN] = "deep_sleep_en", + [DA850_EVM_BB_EXP_SW_RST] = "sw_rst", + [DA850_EVM_BB_EXP_TP_23] = "tp_23", + [DA850_EVM_BB_EXP_TP_22] = "tp_22", + [DA850_EVM_BB_EXP_TP_21] = "tp_21", + [DA850_EVM_BB_EXP_USER_PB1] = "user_pb1", + [DA850_EVM_BB_EXP_USER_LED2] = "user_led2", + [DA850_EVM_BB_EXP_USER_LED1] = "user_led1", + [DA850_EVM_BB_EXP_USER_SW1] = "user_sw1", + [DA850_EVM_BB_EXP_USER_SW2] = "user_sw2", + [DA850_EVM_BB_EXP_USER_SW3] = "user_sw3", + [DA850_EVM_BB_EXP_USER_SW4] = "user_sw4", + [DA850_EVM_BB_EXP_USER_SW5] = "user_sw5", + [DA850_EVM_BB_EXP_USER_SW6] = "user_sw6", + [DA850_EVM_BB_EXP_USER_SW7] = "user_sw7", + [DA850_EVM_BB_EXP_USER_SW8] = "user_sw8", +}; + +#define DA850_N_BB_USER_SW 8 + +static struct gpio_keys_button da850_evm_bb_keys[] = { + [0] = { + .type = EV_KEY, + .active_low = 1, + .wakeup = 0, + .debounce_interval = DA850_KEYS_DEBOUNCE_MS, + .code = KEY_PROG1, + .desc = NULL, /* assigned at runtime */ + .gpio = -1, /* assigned at runtime */ + }, + [1 ... DA850_N_BB_USER_SW] = { + .type = EV_SW, + .active_low = 1, + .wakeup = 0, + .debounce_interval = DA850_KEYS_DEBOUNCE_MS, + .code = -1, /* assigned at runtime */ + .desc = NULL, /* assigned at runtime */ + .gpio = -1, /* assigned at runtime */ + }, +}; + +static struct gpio_keys_platform_data da850_evm_bb_keys_pdata = { + .buttons = da850_evm_bb_keys, + .nbuttons = ARRAY_SIZE(da850_evm_bb_keys), + .rep = 0, /* disable auto-repeat */ + .poll_interval = DA850_GPIO_KEYS_POLL_MS, +}; + +static struct platform_device da850_evm_bb_keys_device = { + .name = "gpio-keys", + .id = 1, + .dev = { + .platform_data = &da850_evm_bb_keys_pdata + }, +}; + +static void da850_evm_bb_keys_init(unsigned gpio) +{ + int i; + struct gpio_keys_button *button; + + button = &da850_evm_bb_keys[0]; + button->desc = (char *) + da850_evm_bb_exp[DA850_EVM_BB_EXP_USER_PB1]; + button->gpio = gpio + DA850_EVM_BB_EXP_USER_PB1; + + for (i = 0; i < DA850_N_BB_USER_SW; i++) { + button = &da850_evm_bb_keys[i + 1]; + button->code = SW_LID + i; + button->desc = (char *) + da850_evm_bb_exp[DA850_EVM_BB_EXP_USER_SW1 + i]; + button->gpio = gpio + DA850_EVM_BB_EXP_USER_SW1 + i; + } +} + +#define DA850_N_BB_USER_LED 2 + +static struct gpio_led da850_evm_bb_leds[] = { + [0 ... DA850_N_BB_USER_LED - 1] = { + .active_low = 1, + .gpio = -1, /* assigned at runtime */ + .name = NULL, /* assigned at runtime */ + }, +}; + +static struct gpio_led_platform_data da850_evm_bb_leds_pdata = { + .leds = da850_evm_bb_leds, + .num_leds = ARRAY_SIZE(da850_evm_bb_leds), +}; + +static struct platform_device da850_evm_bb_leds_device = { + .name = "leds-gpio", + .id = -1, + .dev = { + .platform_data = &da850_evm_bb_leds_pdata + } +}; + +static void da850_evm_bb_leds_init(unsigned gpio) +{ + int i; + struct gpio_led *led; + + for (i = 0; i < DA850_N_BB_USER_LED; i++) { + led = &da850_evm_bb_leds[i]; + + led->gpio = gpio + DA850_EVM_BB_EXP_USER_LED2 + i; + led->name = + da850_evm_bb_exp[DA850_EVM_BB_EXP_USER_LED2 + i]; + } +} + +static int da850_evm_bb_expander_setup(struct i2c_client *client, + unsigned gpio, unsigned ngpio, + void *c) +{ + int ret; + int deep_sleep_en, sw_rst; + + deep_sleep_en = gpio + DA850_EVM_BB_EXP_DEEP_SLEEP_EN; + sw_rst = gpio + DA850_EVM_BB_EXP_SW_RST; + + /* Do not allow sysfs control of deep_sleep_en */ + ret = gpio_request(deep_sleep_en, + da850_evm_bb_exp[DA850_EVM_BB_EXP_DEEP_SLEEP_EN]); + if (ret) { + pr_warning("Cannot open IO expander pin %d\n", deep_sleep_en); + goto io_exp_setup_deep_sleep_en_fail; + } + /* do not drive a value on deep_sleep_en */ + gpio_direction_input(deep_sleep_en); + + /* Do not allow sysfs control of sw_rst */ + ret = gpio_request(sw_rst, + da850_evm_bb_exp[DA850_EVM_BB_EXP_SW_RST]); + if (ret) { + pr_warning("Cannot open IO expander pin %d\n", sw_rst); + goto io_exp_setup_sw_rst_fail; + } + /* do not drive a value on sw_rst */ + gpio_direction_input(sw_rst); + + /* + * Register the switches and pushbutton on the baseboard as a gpio-keys + * device. + */ + da850_evm_bb_keys_init(gpio); + ret = platform_device_register(&da850_evm_bb_keys_device); + if (ret) { + pr_warning("Could not register baseboard GPIO expander switches" + " device\n"); + goto io_exp_setup_sw_fail; + } + + da850_evm_bb_leds_init(gpio); + ret = platform_device_register(&da850_evm_bb_leds_device); + if (ret) { + pr_warning("Could not register baseboard GPIO expander LEDS " + "device\n"); + goto io_exp_setup_leds_fail; + } + + return 0; + +io_exp_setup_leds_fail: + platform_device_unregister(&da850_evm_bb_keys_device); +io_exp_setup_sw_fail: + gpio_free(sw_rst); +io_exp_setup_sw_rst_fail: + gpio_free(deep_sleep_en); +io_exp_setup_deep_sleep_en_fail: + return ret; +} + +static int da850_evm_bb_expander_teardown(struct i2c_client *client, + unsigned gpio, unsigned ngpio, void *c) +{ + int deep_sleep_en, sw_rst; + + deep_sleep_en = gpio + DA850_EVM_BB_EXP_DEEP_SLEEP_EN; + sw_rst = gpio + DA850_EVM_BB_EXP_SW_RST; + + platform_device_unregister(&da850_evm_bb_leds_device); + platform_device_unregister(&da850_evm_bb_keys_device); + gpio_free(sw_rst); + gpio_free(deep_sleep_en); + + return 0; +} + static struct pca953x_platform_data da850_evm_ui_expander_info = { .gpio_base = DAVINCI_N_GPIO, .setup = da850_evm_ui_expander_setup, @@ -438,6 +652,13 @@ static struct pca953x_platform_data da850_evm_ui_expander_info = { .names = da850_evm_ui_exp, }; +static struct pca953x_platform_data da850_evm_bb_expander_info = { + .gpio_base = DA850_BB_EXPANDER_GPIO_BASE, + .setup = da850_evm_bb_expander_setup, + .teardown = da850_evm_bb_expander_teardown, + .names = da850_evm_bb_exp, +}; + static struct i2c_board_info __initdata da850_evm_i2c_devices[] = { { I2C_BOARD_INFO("tlv320aic3x", 0x18), @@ -446,6 +667,10 @@ static struct i2c_board_info __initdata da850_evm_i2c_devices[] = { I2C_BOARD_INFO("tca6416", 0x20), .platform_data = &da850_evm_ui_expander_info, }, + { + I2C_BOARD_INFO("tca6416", 0x21), + .platform_data = &da850_evm_bb_expander_info, + }, }; static struct davinci_i2c_platform_data da850_evm_i2c_0_pdata = {