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Commit 59f06d67 authored by Russell King's avatar Russell King
Browse files

ARM: sa1100/assabet: convert serial to gpiod APIs 



Convert the Assabet serial modem control signals to use the gpiod APIs
rather than custom callbacks into platform code.

Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent 0faf70ca

arch/arm/mach-sa1100/assabet.c

+28 −63
Original line number Diff line number Diff line
@@ -522,6 +522,29 @@ static const struct gpio_keys_platform_data assabet_keys_pdata = { 
	.rep = 0,

};



static struct gpiod_lookup_table assabet_uart1_gpio_table = {

	.dev_id = "sa11x0-uart.1",

	.table = {

		GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW),

		{ },

	},

};



static struct gpiod_lookup_table assabet_uart3_gpio_table = {

	.dev_id = "sa11x0-uart.3",

	.table = {

		GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW),

		GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW),

		{ },

	},

};



static void __init assabet_init(void)

{

	/*
@@ -568,7 +591,10 @@ static void __init assabet_init(void) 
			neponset_resources, ARRAY_SIZE(neponset_resources));

#endif

	} else {

		gpiod_add_lookup_table(&assabet_uart1_gpio_table);

		gpiod_add_lookup_table(&assabet_uart3_gpio_table);

		gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table);



		sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,

					assabet_cf_vcc_consumers,

					ARRAY_SIZE(assabet_cf_vcc_consumers),
@@ -658,74 +684,13 @@ static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 
{

	if (port->mapbase == _Ser1UTCR0) {

		if (state)

			ASSABET_BCR_clear(ASSABET_BCR_RS232EN |

					  ASSABET_BCR_COM_RTS |

					  ASSABET_BCR_COM_DTR);

		else

			ASSABET_BCR_set(ASSABET_BCR_RS232EN |

					ASSABET_BCR_COM_RTS |

					ASSABET_BCR_COM_DTR);

	}

}



/*

 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)

 * and UART3 (radio module).  We only handle them for UART1 here.

 */

static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)

{

	if (port->mapbase == _Ser1UTCR0) {

		u_int set = 0, clear = 0;



		if (mctrl & TIOCM_RTS)

			clear |= ASSABET_BCR_COM_RTS;

			ASSABET_BCR_clear(ASSABET_BCR_RS232EN);

		else

			set |= ASSABET_BCR_COM_RTS;



		if (mctrl & TIOCM_DTR)

			clear |= ASSABET_BCR_COM_DTR;

		else

			set |= ASSABET_BCR_COM_DTR;



		ASSABET_BCR_clear(clear);

		ASSABET_BCR_set(set);

	}

			ASSABET_BCR_set(ASSABET_BCR_RS232EN);

	}



static u_int assabet_get_mctrl(struct uart_port *port)

{

	u_int ret = 0;

	u_int bsr = ASSABET_BSR;



	/* need 2 reads to read current value */

	bsr = ASSABET_BSR;



	if (port->mapbase == _Ser1UTCR0) {

		if (bsr & ASSABET_BSR_COM_DCD)

			ret |= TIOCM_CD;

		if (bsr & ASSABET_BSR_COM_CTS)

			ret |= TIOCM_CTS;

		if (bsr & ASSABET_BSR_COM_DSR)

			ret |= TIOCM_DSR;

	} else if (port->mapbase == _Ser3UTCR0) {

		if (bsr & ASSABET_BSR_RAD_DCD)

			ret |= TIOCM_CD;

		if (bsr & ASSABET_BSR_RAD_CTS)

			ret |= TIOCM_CTS;

		if (bsr & ASSABET_BSR_RAD_DSR)

			ret |= TIOCM_DSR;

		if (bsr & ASSABET_BSR_RAD_RI)

			ret |= TIOCM_RI;

	} else {

		ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;

	}



	return ret;

}



static struct sa1100_port_fns assabet_port_fns __initdata = {

	.set_mctrl	= assabet_set_mctrl,

	.get_mctrl	= assabet_get_mctrl,

	.pm		= assabet_uart_pm,

};