ARM: OMAP2+: Remove legacy serial.c

We can now initialize the UARTs using device tree.
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/Makefile

@@ -6,7 +6,7 @@ ccflags-y := -I$(srctree)/$(src)/include \
 	-I$(srctree)/arch/arm/plat-omap/include
 
 # Common support
-obj-y := id.o io.o control.o mux.o devices.o fb.o serial.o timer.o pm.o \
+obj-y := id.o io.o control.o mux.o devices.o fb.o timer.o pm.o \
 	 common.o gpio.o dma.o wd_timer.o display.o i2c.o hdq1w.o omap_hwmod.o \
 	 omap_device.o omap-headsmp.o sram.o drm.o
 

arch/arm/mach-omap2/serial.c

-/*
- * arch/arm/mach-omap2/serial.c
- *
- * OMAP2 serial support.
- *
- * Copyright (C) 2005-2008 Nokia Corporation
- * Author: Paul Mundt <paul.mundt@nokia.com>
- *
- * Major rework for PM support by Kevin Hilman
- *
- * Based off of arch/arm/mach-omap/omap1/serial.c
- *
- * Copyright (C) 2009 Texas Instruments
- * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/pm_runtime.h>
-#include <linux/console.h>
-#include <linux/omap-dma.h>
-#include <linux/platform_data/serial-omap.h>
-
-#include "common.h"
-#include "omap_hwmod.h"
-#include "omap_device.h"
-#include "omap-pm.h"
-#include "soc.h"
-#include "prm2xxx_3xxx.h"
-#include "pm.h"
-#include "cm2xxx_3xxx.h"
-#include "prm-regbits-34xx.h"
-#include "control.h"
-#include "mux.h"
-#include "serial.h"
-
-/*
- * NOTE: By default the serial auto_suspend timeout is disabled as it causes
- * lost characters over the serial ports. This means that the UART clocks will
- * stay on until power/autosuspend_delay is set for the uart from sysfs.
- * This also causes that any deeper omap sleep states are blocked.
- */
-#define DEFAULT_AUTOSUSPEND_DELAY	-1
-
-#define MAX_UART_HWMOD_NAME_LEN		16
-
-struct omap_uart_state {
-	int num;
-
-	struct list_head node;
-	struct omap_hwmod *oh;
-	struct omap_device_pad default_omap_uart_pads[2];
-};
-
-static LIST_HEAD(uart_list);
-static u8 num_uarts;
-static u8 console_uart_id = -1;
-static u8 uart_debug;
-
-#define DEFAULT_RXDMA_POLLRATE		1	/* RX DMA polling rate (us) */
-#define DEFAULT_RXDMA_BUFSIZE		4096	/* RX DMA buffer size */
-#define DEFAULT_RXDMA_TIMEOUT		(3 * HZ)/* RX DMA timeout (jiffies) */
-
-static struct omap_uart_port_info omap_serial_default_info[] __initdata = {
-	{
-		.dma_enabled	= false,
-		.dma_rx_buf_size = DEFAULT_RXDMA_BUFSIZE,
-		.dma_rx_poll_rate = DEFAULT_RXDMA_POLLRATE,
-		.dma_rx_timeout = DEFAULT_RXDMA_TIMEOUT,
-		.autosuspend_timeout = DEFAULT_AUTOSUSPEND_DELAY,
-	},
-};
-
-#ifdef CONFIG_PM
-static void omap_uart_enable_wakeup(struct device *dev, bool enable)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-	struct omap_device *od = to_omap_device(pdev);
-
-	if (!od)
-		return;
-
-	if (enable)
-		omap_hwmod_enable_wakeup(od->hwmods[0]);
-	else
-		omap_hwmod_disable_wakeup(od->hwmods[0]);
-}
-
-#else
-static void omap_uart_enable_wakeup(struct device *dev, bool enable)
-{}
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_OMAP_MUX
-
-#define OMAP_UART_DEFAULT_PAD_NAME_LEN	28
-static char rx_pad_name[OMAP_UART_DEFAULT_PAD_NAME_LEN],
-		tx_pad_name[OMAP_UART_DEFAULT_PAD_NAME_LEN] __initdata;
-
-static void  __init
-omap_serial_fill_uart_tx_rx_pads(struct omap_board_data *bdata,
-				struct omap_uart_state *uart)
-{
-	uart->default_omap_uart_pads[0].name = rx_pad_name;
-	uart->default_omap_uart_pads[0].flags = OMAP_DEVICE_PAD_REMUX |
-							OMAP_DEVICE_PAD_WAKEUP;
-	uart->default_omap_uart_pads[0].enable = OMAP_PIN_INPUT |
-							OMAP_MUX_MODE0;
-	uart->default_omap_uart_pads[0].idle = OMAP_PIN_INPUT | OMAP_MUX_MODE0;
-	uart->default_omap_uart_pads[1].name = tx_pad_name;
-	uart->default_omap_uart_pads[1].enable = OMAP_PIN_OUTPUT |
-							OMAP_MUX_MODE0;
-	bdata->pads = uart->default_omap_uart_pads;
-	bdata->pads_cnt = ARRAY_SIZE(uart->default_omap_uart_pads);
-}
-
-static void  __init omap_serial_check_wakeup(struct omap_board_data *bdata,
-						struct omap_uart_state *uart)
-{
-	struct omap_mux_partition *tx_partition = NULL, *rx_partition = NULL;
-	struct omap_mux *rx_mux = NULL, *tx_mux = NULL;
-	char *rx_fmt, *tx_fmt;
-	int uart_nr = bdata->id + 1;
-
-	if (bdata->id != 2) {
-		rx_fmt = "uart%d_rx.uart%d_rx";
-		tx_fmt = "uart%d_tx.uart%d_tx";
-	} else {
-		rx_fmt = "uart%d_rx_irrx.uart%d_rx_irrx";
-		tx_fmt = "uart%d_tx_irtx.uart%d_tx_irtx";
-	}
-
-	snprintf(rx_pad_name, OMAP_UART_DEFAULT_PAD_NAME_LEN, rx_fmt,
-			uart_nr, uart_nr);
-	snprintf(tx_pad_name, OMAP_UART_DEFAULT_PAD_NAME_LEN, tx_fmt,
-			uart_nr, uart_nr);
-
-	if (omap_mux_get_by_name(rx_pad_name, &rx_partition, &rx_mux) >= 0 &&
-			omap_mux_get_by_name
-				(tx_pad_name, &tx_partition, &tx_mux) >= 0) {
-		u16 tx_mode, rx_mode;
-
-		tx_mode = omap_mux_read(tx_partition, tx_mux->reg_offset);
-		rx_mode = omap_mux_read(rx_partition, rx_mux->reg_offset);
-
-		/*
-		 * Check if uart is used in default tx/rx mode i.e. in mux mode0
-		 * if yes then configure rx pin for wake up capability
-		 */
-		if (OMAP_MODE_UART(rx_mode) && OMAP_MODE_UART(tx_mode))
-			omap_serial_fill_uart_tx_rx_pads(bdata, uart);
-	}
-}
-#else
-static void __init omap_serial_check_wakeup(struct omap_board_data *bdata,
-		struct omap_uart_state *uart)
-{
-}
-#endif
-
-static char *cmdline_find_option(char *str)
-{
-	extern char *saved_command_line;
-
-	return strstr(saved_command_line, str);
-}
-
-static int __init omap_serial_early_init(void)
-{
-	if (of_have_populated_dt())
-		return -ENODEV;
-
-	do {
-		char oh_name[MAX_UART_HWMOD_NAME_LEN];
-		struct omap_hwmod *oh;
-		struct omap_uart_state *uart;
-		char uart_name[MAX_UART_HWMOD_NAME_LEN];
-
-		snprintf(oh_name, MAX_UART_HWMOD_NAME_LEN,
-			 "uart%d", num_uarts + 1);
-		oh = omap_hwmod_lookup(oh_name);
-		if (!oh)
-			break;
-
-		uart = kzalloc(sizeof(struct omap_uart_state), GFP_KERNEL);
-		if (WARN_ON(!uart))
-			return -ENODEV;
-
-		uart->oh = oh;
-		uart->num = num_uarts++;
-		list_add_tail(&uart->node, &uart_list);
-		snprintf(uart_name, MAX_UART_HWMOD_NAME_LEN,
-				"%s%d", OMAP_SERIAL_NAME, uart->num);
-
-		if (cmdline_find_option(uart_name)) {
-			console_uart_id = uart->num;
-
-			if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG) {
-				uart_debug = true;
-				pr_info("%s used as console in debug mode: uart%d clocks will not be gated",
-					uart_name, uart->num);
-			}
-		}
-	} while (1);
-
-	return 0;
-}
-omap_postcore_initcall(omap_serial_early_init);
-
-/**
- * omap_serial_init_port() - initialize single serial port
- * @bdata: port specific board data pointer
- * @info: platform specific data pointer
- *
- * This function initialies serial driver for given port only.
- * Platforms can call this function instead of omap_serial_init()
- * if they don't plan to use all available UARTs as serial ports.
- *
- * Don't mix calls to omap_serial_init_port() and omap_serial_init(),
- * use only one of the two.
- */
-void __init omap_serial_init_port(struct omap_board_data *bdata,
-			struct omap_uart_port_info *info)
-{
-	struct omap_uart_state *uart;
-	struct omap_hwmod *oh;
-	struct platform_device *pdev;
-	void *pdata = NULL;
-	u32 pdata_size = 0;
-	char *name;
-	struct omap_uart_port_info omap_up;
-
-	if (WARN_ON(!bdata))
-		return;
-	if (WARN_ON(bdata->id < 0))
-		return;
-	if (WARN_ON(bdata->id >= num_uarts))
-		return;
-
-	list_for_each_entry(uart, &uart_list, node)
-		if (bdata->id == uart->num)
-			break;
-	if (!info)
-		info = omap_serial_default_info;
-
-	oh = uart->oh;
-	name = OMAP_SERIAL_DRIVER_NAME;
-
-	omap_up.dma_enabled = info->dma_enabled;
-	omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
-	omap_up.flags = UPF_BOOT_AUTOCONF;
-	omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
-	omap_up.enable_wakeup = omap_uart_enable_wakeup;
-	omap_up.dma_rx_buf_size = info->dma_rx_buf_size;
-	omap_up.dma_rx_timeout = info->dma_rx_timeout;
-	omap_up.dma_rx_poll_rate = info->dma_rx_poll_rate;
-	omap_up.autosuspend_timeout = info->autosuspend_timeout;
-
-	pdata = &omap_up;
-	pdata_size = sizeof(struct omap_uart_port_info);
-
-	if (WARN_ON(!oh))
-		return;
-
-	pdev = omap_device_build(name, uart->num, oh, pdata, pdata_size);
-	if (IS_ERR(pdev)) {
-		WARN(1, "Could not build omap_device for %s: %s.\n", name,
-		     oh->name);
-		return;
-	}
-
-	oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);
-
-	if (console_uart_id == bdata->id) {
-		omap_device_enable(pdev);
-		pm_runtime_set_active(&pdev->dev);
-	}
-
-	oh->dev_attr = uart;
-
-	if (((cpu_is_omap34xx() || cpu_is_omap44xx()) && bdata->pads)
-			&& !uart_debug)
-		device_init_wakeup(&pdev->dev, true);
-}
-
-/**
- * omap_serial_board_init() - initialize all supported serial ports
- * @info: platform specific data pointer
- *
- * Initializes all available UARTs as serial ports. Platforms
- * can call this function when they want to have default behaviour
- * for serial ports (e.g initialize them all as serial ports).
- */
-void __init omap_serial_board_init(struct omap_uart_port_info *info)
-{
-	struct omap_uart_state *uart;
-	struct omap_board_data bdata;
-
-	list_for_each_entry(uart, &uart_list, node) {
-		bdata.id = uart->num;
-		bdata.flags = 0;
-		bdata.pads = NULL;
-		bdata.pads_cnt = 0;
-
-		omap_serial_check_wakeup(&bdata, uart);
-
-		if (!info)
-			omap_serial_init_port(&bdata, NULL);
-		else
-			omap_serial_init_port(&bdata, &info[uart->num]);
-	}
-}
-
-/**
- * omap_serial_init() - initialize all supported serial ports
- *
- * Initializes all available UARTs.
- * Platforms can call this function when they want to have default behaviour
- * for serial ports (e.g initialize them all as serial ports).
- */
-void __init omap_serial_init(void)
-{
-	omap_serial_board_init(NULL);
-}