1 files changed, 321 insertions, 18 deletions

diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index c6e11c682e4c..b01fb2ab944a 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -17,8 +17,10 @@
 #include <linux/i2c.h>
 #include <linux/i2c/at24.h>
 #include <linux/i2c/pca953x.h>
+#include <linux/input.h>
 #include <linux/mfd/tps6507x.h>
 #include <linux/gpio.h>
+#include <linux/gpio_keys.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
@@ -266,34 +268,115 @@ static inline void da850_evm_setup_emac_rmii(int rmii_sel)
         struct davinci_soc_info *soc_info = &davinci_soc_info;
 
         soc_info->emac_pdata->rmii_en = 1;
-        gpio_set_value(rmii_sel, 0);
+        gpio_set_value_cansleep(rmii_sel, 0);
 }
 #else
 static inline void da850_evm_setup_emac_rmii(int rmii_sel) { }
 #endif
 
+
+#define DA850_KEYS_DEBOUNCE_MS  10
+/*
+ * At 200ms polling interval it is possible to miss an
+ * event by tapping very lightly on the push button but most
+ * pushes do result in an event; longer intervals require the
+ * user to hold the button whereas shorter intervals require
+ * more CPU time for polling.
+ */
+#define DA850_GPIO_KEYS_POLL_MS 200
+
+enum da850_evm_ui_exp_pins {
+        DA850_EVM_UI_EXP_SEL_C = 5,
+        DA850_EVM_UI_EXP_SEL_B,
+        DA850_EVM_UI_EXP_SEL_A,
+        DA850_EVM_UI_EXP_PB8,
+        DA850_EVM_UI_EXP_PB7,
+        DA850_EVM_UI_EXP_PB6,
+        DA850_EVM_UI_EXP_PB5,
+        DA850_EVM_UI_EXP_PB4,
+        DA850_EVM_UI_EXP_PB3,
+        DA850_EVM_UI_EXP_PB2,
+        DA850_EVM_UI_EXP_PB1,
+};
+
+static const char const *da850_evm_ui_exp[] = {
+        [DA850_EVM_UI_EXP_SEL_C]        = "sel_c",
+        [DA850_EVM_UI_EXP_SEL_B]        = "sel_b",
+        [DA850_EVM_UI_EXP_SEL_A]        = "sel_a",
+        [DA850_EVM_UI_EXP_PB8]          = "pb8",
+        [DA850_EVM_UI_EXP_PB7]          = "pb7",
+        [DA850_EVM_UI_EXP_PB6]          = "pb6",
+        [DA850_EVM_UI_EXP_PB5]          = "pb5",
+        [DA850_EVM_UI_EXP_PB4]          = "pb4",
+        [DA850_EVM_UI_EXP_PB3]          = "pb3",
+        [DA850_EVM_UI_EXP_PB2]          = "pb2",
+        [DA850_EVM_UI_EXP_PB1]          = "pb1",
+};
+
+#define DA850_N_UI_PB           8
+
+static struct gpio_keys_button da850_evm_ui_keys[] = {
+        [0 ... DA850_N_UI_PB - 1] = {
+                .type                   = EV_KEY,
+                .active_low             = 1,
+                .wakeup                 = 0,
+                .debounce_interval      = DA850_KEYS_DEBOUNCE_MS,
+                .code                   = -1, /* assigned at runtime */
+                .gpio                   = -1, /* assigned at runtime */
+                .desc                   = NULL, /* assigned at runtime */
+        },
+};
+
+static struct gpio_keys_platform_data da850_evm_ui_keys_pdata = {
+        .buttons = da850_evm_ui_keys,
+        .nbuttons = ARRAY_SIZE(da850_evm_ui_keys),
+        .poll_interval = DA850_GPIO_KEYS_POLL_MS,
+};
+
+static struct platform_device da850_evm_ui_keys_device = {
+        .name = "gpio-keys-polled",
+        .id = 0,
+        .dev = {
+                .platform_data = &da850_evm_ui_keys_pdata
+        },
+};
+
+static void da850_evm_ui_keys_init(unsigned gpio)
+{
+        int i;
+        struct gpio_keys_button *button;
+
+        for (i = 0; i < DA850_N_UI_PB; i++) {
+                button = &da850_evm_ui_keys[i];
+                button->code = KEY_F8 - i;
+                button->desc = (char *)
+                                da850_evm_ui_exp[DA850_EVM_UI_EXP_PB8 + i];
+                button->gpio = gpio + DA850_EVM_UI_EXP_PB8 + i;
+        }
+}
+
 static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
                                                 unsigned ngpio, void *c)
 {
         int sel_a, sel_b, sel_c, ret;
 
-        sel_a = gpio + 7;
-        sel_b = gpio + 6;
-        sel_c = gpio + 5;
+        sel_a = gpio + DA850_EVM_UI_EXP_SEL_A;
+        sel_b = gpio + DA850_EVM_UI_EXP_SEL_B;
+        sel_c = gpio + DA850_EVM_UI_EXP_SEL_C;
 
-        ret = gpio_request(sel_a, "sel_a");
+        ret = gpio_request(sel_a, da850_evm_ui_exp[DA850_EVM_UI_EXP_SEL_A]);
         if (ret) {
                 pr_warning("Cannot open UI expander pin %d\n", sel_a);
                 goto exp_setup_sela_fail;
         }
 
-        ret = gpio_request(sel_b, "sel_b");
+        ret = gpio_request(sel_b, da850_evm_ui_exp[DA850_EVM_UI_EXP_SEL_B]);
         if (ret) {
                 pr_warning("Cannot open UI expander pin %d\n", sel_b);
                 goto exp_setup_selb_fail;
         }
 
-        ret = gpio_request(sel_c, "sel_c");
+        ret = gpio_request(sel_c, da850_evm_ui_exp[DA850_EVM_UI_EXP_SEL_C]);
         if (ret) {
                 pr_warning("Cannot open UI expander pin %d\n", sel_c);
                 goto exp_setup_selc_fail;
@@ -304,6 +387,13 @@ static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
         gpio_direction_output(sel_b, 1);
         gpio_direction_output(sel_c, 1);
 
+        da850_evm_ui_keys_init(gpio);
+        ret = platform_device_register(&da850_evm_ui_keys_device);
+        if (ret) {
+                pr_warning("Could not register UI GPIO expander push-buttons");
+                goto exp_setup_keys_fail;
+        }
+
         ui_card_detected = 1;
         pr_info("DA850/OMAP-L138 EVM UI card detected\n");
 
@@ -313,6 +403,8 @@ static int da850_evm_ui_expander_setup(struct i2c_client *client, unsigned gpio,
 
         return 0;
 
+exp_setup_keys_fail:
+        gpio_free(sel_c);
 exp_setup_selc_fail:
         gpio_free(sel_b);
 exp_setup_selb_fail:
@@ -324,14 +416,192 @@ exp_setup_sela_fail:
 static int da850_evm_ui_expander_teardown(struct i2c_client *client,
                                         unsigned gpio, unsigned ngpio, void *c)
 {
+        platform_device_unregister(&da850_evm_ui_keys_device);
+
         /* deselect all functionalities */
-        gpio_set_value(gpio + 5, 1);
-        gpio_set_value(gpio + 6, 1);
-        gpio_set_value(gpio + 7, 1);
+        gpio_set_value_cansleep(gpio + DA850_EVM_UI_EXP_SEL_C, 1);
+        gpio_set_value_cansleep(gpio + DA850_EVM_UI_EXP_SEL_B, 1);
+        gpio_set_value_cansleep(gpio + DA850_EVM_UI_EXP_SEL_A, 1);
+
+        gpio_free(gpio + DA850_EVM_UI_EXP_SEL_C);
+        gpio_free(gpio + DA850_EVM_UI_EXP_SEL_B);
+        gpio_free(gpio + DA850_EVM_UI_EXP_SEL_A);
+
+        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),
+        .poll_interval = DA850_GPIO_KEYS_POLL_MS,
+};
+
+static struct platform_device da850_evm_bb_keys_device = {
+        .name = "gpio-keys-polled",
+        .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;
+        }
+}
 
-        gpio_free(gpio + 5);
-        gpio_free(gpio + 6);
-        gpio_free(gpio + 7);
+#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;
+
+        /*
+         * 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 keys");
+                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");
+                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:
+        return ret;
+}
+
+static int da850_evm_bb_expander_teardown(struct i2c_client *client,
+                                        unsigned gpio, unsigned ngpio, void *c)
+{
+        platform_device_unregister(&da850_evm_bb_leds_device);
+        platform_device_unregister(&da850_evm_bb_keys_device);
 
         return 0;
 }
@@ -340,6 +610,14 @@ static struct pca953x_platform_data da850_evm_ui_expander_info = {
         .gpio_base      = DAVINCI_N_GPIO,
         .setup          = da850_evm_ui_expander_setup,
         .teardown       = da850_evm_ui_expander_teardown,
+        .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[] = {
@@ -350,6 +628,10 @@ 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 = {
@@ -540,7 +822,7 @@ static struct regulator_init_data tps65070_regulator_data[] = {
         {
                 .constraints = {
                         .min_uV = 950000,
-                        .max_uV = 1320000,
+                        .max_uV = 1350000,
                         .valid_ops_mask = (REGULATOR_CHANGE_VOLTAGE |
                                 REGULATOR_CHANGE_STATUS),
                         .boot_on = 1,
@@ -591,7 +873,7 @@ static struct tps6507x_board tps_board = {
         .tps6507x_ts_init_data = &tps6507x_touchscreen_data,
 };
 
-static struct i2c_board_info __initdata da850evm_tps65070_info[] = {
+static struct i2c_board_info __initdata da850_evm_tps65070_info[] = {
         {
                 I2C_BOARD_INFO("tps6507x", 0x48),
                 .platform_data = &tps_board,
@@ -600,8 +882,8 @@ static struct i2c_board_info __initdata da850evm_tps65070_info[] = {
 
 static int __init pmic_tps65070_init(void)
 {
-        return i2c_register_board_info(1, da850evm_tps65070_info,
-                                        ARRAY_SIZE(da850evm_tps65070_info));
+        return i2c_register_board_info(1, da850_evm_tps65070_info,
+                                        ARRAY_SIZE(da850_evm_tps65070_info));
 }
 
 static const short da850_evm_lcdc_pins[] = {
@@ -736,6 +1018,27 @@ static struct edma_rsv_info *da850_edma_rsv[2] = {
         &da850_edma_cc1_rsv,
 };
 
+#ifdef CONFIG_CPU_FREQ
+static __init int da850_evm_init_cpufreq(void)
+{
+        switch (system_rev & 0xF) {
+        case 3:
+                da850_max_speed = 456000;
+                break;
+        case 2:
+                da850_max_speed = 408000;
+                break;
+        case 1:
+                da850_max_speed = 372000;
+                break;
+        }
+
+        return da850_register_cpufreq("pll0_sysclk3");
+}
+#else
+static __init int da850_evm_init_cpufreq(void) { return 0; }
+#endif
+
 static __init void da850_evm_init(void)
 {
         int ret;
@@ -836,7 +1139,7 @@ static __init void da850_evm_init(void)
         if (ret)
                 pr_warning("da850_evm_init: rtc setup failed: %d\n", ret);
 
-        ret = da850_register_cpufreq("pll0_sysclk3");
+        ret = da850_evm_init_cpufreq();
         if (ret)
                 pr_warning("da850_evm_init: cpufreq registration failed: %d\n",
                                 ret);