ARM: davinci: serial: remove davinci_serial_setup_clk()

Get rid of davinci_serial_setup_clk() since its not called
from multiple places now. Instead initialize clock in
davinci_serial_init() itself. This also helps get rid of
"serial_dev" member of struct davinci_soc_info.
Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Suggested-by: Sekhar Nori <nsekhar@ti.com>
[nsekhar@ti.com: split removal of davinci_serial_setup_clk()
		 into a separate patch.]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/da830.c

@@ -1199,7 +1199,6 @@ static struct davinci_soc_info davinci_soc_info_da830 = {
 	.gpio_base		= DA8XX_GPIO_BASE,
 	.gpio_num		= 128,
 	.gpio_irq		= IRQ_DA8XX_GPIO0,
-	.serial_dev		= da8xx_serial_device,
 	.emac_pdata		= &da8xx_emac_pdata,
 };
 

arch/arm/mach-davinci/da850.c

@@ -1301,7 +1301,6 @@ static struct davinci_soc_info davinci_soc_info_da850 = {
 	.gpio_base		= DA8XX_GPIO_BASE,
 	.gpio_num		= 144,
 	.gpio_irq		= IRQ_DA8XX_GPIO0,
-	.serial_dev		= da8xx_serial_device,
 	.emac_pdata		= &da8xx_emac_pdata,
 	.sram_dma		= DA8XX_SHARED_RAM_BASE,
 	.sram_len		= SZ_128K,

arch/arm/mach-davinci/dm355.c

@@ -1009,7 +1009,6 @@ static struct davinci_soc_info davinci_soc_info_dm355 = {
 	.gpio_base		= DAVINCI_GPIO_BASE,
 	.gpio_num		= 104,
 	.gpio_irq		= IRQ_DM355_GPIOBNK0,
-	.serial_dev		= dm355_serial_device,
 	.sram_dma		= 0x00010000,
 	.sram_len		= SZ_32K,
 };

arch/arm/mach-davinci/dm365.c

@@ -1109,7 +1109,6 @@ static struct davinci_soc_info davinci_soc_info_dm365 = {
 	.gpio_num		= 104,
 	.gpio_irq		= IRQ_DM365_GPIO0,
 	.gpio_unbanked		= 8,	/* really 16 ... skip muxed GPIOs */
-	.serial_dev		= dm365_serial_device,
 	.emac_pdata		= &dm365_emac_pdata,
 	.sram_dma		= 0x00010000,
 	.sram_len		= SZ_32K,

arch/arm/mach-davinci/dm644x.c

@@ -900,7 +900,6 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
 	.gpio_base		= DAVINCI_GPIO_BASE,
 	.gpio_num		= 71,
 	.gpio_irq		= IRQ_GPIOBNK0,
-	.serial_dev		= dm644x_serial_device,
 	.emac_pdata		= &dm644x_emac_pdata,
 	.sram_dma		= 0x00008000,
 	.sram_len		= SZ_16K,

arch/arm/mach-davinci/dm646x.c

@@ -877,7 +877,6 @@ static struct davinci_soc_info davinci_soc_info_dm646x = {
 	.gpio_base		= DAVINCI_GPIO_BASE,
 	.gpio_num		= 43, /* Only 33 usable */
 	.gpio_irq		= IRQ_DM646X_GPIOBNK0,
-	.serial_dev		= dm646x_serial_device,
 	.emac_pdata		= &dm646x_emac_pdata,
 	.sram_dma		= 0x10010000,
 	.sram_len		= SZ_32K,

arch/arm/mach-davinci/include/mach/common.h

@@ -72,7 +72,6 @@ struct davinci_soc_info {
 	unsigned			gpio_unbanked;
 	struct davinci_gpio_controller	*gpio_ctlrs;
 	int				gpio_ctlrs_num;
-	struct platform_device		*serial_dev;
 	struct emac_platform_data	*emac_pdata;
 	dma_addr_t			sram_dma;
 	unsigned			sram_len;

arch/arm/mach-davinci/include/mach/serial.h

@@ -40,7 +40,6 @@
 
 #ifndef __ASSEMBLY__
 extern int davinci_serial_init(struct platform_device *);
-extern int davinci_serial_setup_clk(unsigned instance, unsigned int *rate);
 #endif
 
 #endif /* __ASM_ARCH_SERIAL_H */

arch/arm/mach-davinci/serial.c

@@ -70,33 +70,12 @@ static void __init davinci_serial_reset(struct plat_serial8250_port *p)
 				 UART_DM646X_SCR_TX_WATERMARK);
 }
 
-/* Enable UART clock and obtain its rate */
-int __init davinci_serial_setup_clk(unsigned instance, unsigned int *rate)
-{
-	struct clk *clk;
-	struct davinci_soc_info *soc_info = &davinci_soc_info;
-	struct device *dev = &soc_info->serial_dev[instance].dev;
-
-	clk = clk_get(dev, NULL);
-	if (IS_ERR(clk)) {
-		pr_err("%s:%d: failed to get UART%d clock\n",
-					__func__, __LINE__, instance);
-		return PTR_ERR(clk);
-	}
-
-	clk_prepare_enable(clk);
-
-	if (rate)
-		*rate = clk_get_rate(clk);
-
-	return 0;
-}
-
 int __init davinci_serial_init(struct platform_device *serial_dev)
 {
 	int i, ret = 0;
 	struct device *dev;
 	struct plat_serial8250_port *p;
+	struct clk *clk;
 
 	/*
 	 * Make sure the serial ports are muxed on at this point.
@@ -110,9 +89,16 @@ int __init davinci_serial_init(struct platform_device *serial_dev)
 		if (ret)
 			continue;
 
-		ret = davinci_serial_setup_clk(i, &p->uartclk);
-		if (ret)
+		clk = clk_get(dev, NULL);
+		if (IS_ERR(clk)) {
+			pr_err("%s:%d: failed to get UART%d clock\n",
+			       __func__, __LINE__, i);
 			continue;
+		}
+
+		clk_prepare_enable(clk);
+
+		p->uartclk = clk_get_rate(clk);
 
 		if (!p->membase && p->mapbase) {
 			p->membase = ioremap(p->mapbase, SZ_4K);