Thread (50 messages) 50 messages, 8 authors, 2011-12-22

[PATCH v2 2/7] ARM: OMAP1: ams-delta: convert latches to basic_mmio_gpio

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From: tony@atomide.com (Tony Lindgren)
Date: 2011-12-20 00:06:06
Also in: linux-omap, lkml 

* Janusz Krzysztofik [off-list ref] [111219 14:41]:
Once ready, ams-delta specific device drivers currently calling custom
ams_delta_latch[12]_write() functions can be updated to call generic
gpio_set_value() instead, which will make them less platform dependent.
Even more, some custom ams-delta only drivers can perhaps be dropped
from the tree after converting selected ams-delta platform devices to
follow generic GPIO based device models.

Depends on patch 1/7, "ARM: OMAP1: ams-delta: register latch dependent
devices later".
Hmm looking at this maybe you can move the all the latch stuff into
a device driver?

Then you can have the other drivers register with it and let the
module dependencies take care of the init order?

You should only register the platform_device entries in your board-*.c
file, I don't think you actually need to do anything there to power
up things in the board-*.c file execept for the 8250.c driver?
quoted hunk ↗ jump to hunk
+static struct gpio latch_gpios[] __initconst = {
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LED_CAMERA,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "led_camera",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LED_ADVERT,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "led_advert",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LED_EMAIL,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "led_email",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LED_HANDSFREE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "led_handsfree",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LED_VOICEMAIL,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "led_voicemail",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LED_VOICE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "led_voice",
+	},
+	{
+		.gpio	= AMS_DELTA_LATCH1_GPIO_BASE + 6,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "dockit1",
+	},
+	{
+		.gpio	= AMS_DELTA_LATCH1_GPIO_BASE + 7,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "dockit2",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LCD_VBLEN,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "lcd_vblen",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_LCD_NDISP,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "lcd_ndisp",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_NAND_NCE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "nand_nce",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_NAND_NRE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "nand_nre",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_NAND_NWP,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "nand_nwp",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_NAND_NWE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "nand_nwe",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_NAND_ALE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "nand_ale",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_NAND_CLE,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "nand_cle",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_KEYBRD_PWR,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "keybrd_pwr",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_KEYBRD_DATAOUT,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "keybrd_dataout",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_SCARD_RSTIN,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "scard_rstin",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_SCARD_CMDVCC,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "scard_cmdvcc",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_MODEM_NRESET,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "modem_nreset",
+	},
+	{
+		.gpio	= AMS_DELTA_GPIO_PIN_MODEM_CODEC,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "modem_codec",
+	},
+	{
+		.gpio	= AMS_DELTA_LATCH2_GPIO_BASE + 14,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "hookflash1",
+	},
+	{
+		.gpio	= AMS_DELTA_LATCH2_GPIO_BASE + 15,
+		.flags	= GPIOF_OUT_INIT_LOW,
+		.label	= "hookflash2",
+	},
+};
+
+void ams_delta_latch_write(int base, int ngpio, u16 mask, u16 value)
+{
+	int bit = 0;
+	u16 bitpos = 1 << bit;
+
+	for (; bit < ngpio; bit++, bitpos = bitpos << 1) {
+		if (!(mask & bitpos))
+			continue;
+		gpio_set_value(base + bit, (value & bitpos) != 0);
+	}
+}
+EXPORT_SYMBOL(ams_delta_latch_write);
This part especially looks like it really should be just a regular
device driver under drivers/ somewhere. That might simplify things
quite a bit for you..

Regards,

Tony
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