Merge tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC late changes from Arnd Bergmann:
 "These are changes that arrived a little late before the merge window
  or that have multiple dependencies on previous branches so they did
  not fit into one of the earlier ones.  There are 10 branches merged
  here, a total of 39 non-merge commits.  Contents are a mixed bag for
  the above reasons:

   * Two new SoC platforms: ST microelectronics stixxxx and the TI
     'Nspire' graphing calculator.  These should have been in the 'soc'
     branch but were a little late
   * Support for the Exynos 5420 variant in mach-exynos, which is based
     on the other exynos branches to avoid conflicts.
   * Various small changes for sh-mobile, ux500 and davinci
   * Common clk support for MSM"

* tag 'late-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
  ARM: ux500: bail out on alien cpus
  ARM: davinci: da850: adopt to pinctrl-single change for configuring multiple pins
  serial: sh-sci: Initialise variables before access in sci_set_termios()
  ARM: stih41x: Add B2020 board support
  ARM: stih41x: Add B2000 board support
  ARM: sti: Add DEBUG_LL console support
  ARM: sti: Add STiH416 SOC support
  ARM: sti: Add STiH415 SOC support
  ARM: msm: Migrate to common clock framework
  ARM: msm: Make proc_comm clock control into a platform driver
  ARM: msm: Prepare clk_get() users in mach-msm for clock-pcom driver
  ARM: msm: Remove clock-7x30.h include file
  ARM: msm: Remove custom clk_set_{max,min}_rate() API
  ARM: msm: Remove custom clk_set_flags() API
  msm: iommu: Use clk_set_rate() instead of clk_set_min_rate()
  msm: iommu: Convert to clk_prepare/unprepare
  msm_sdcc: Convert to clk_prepare/unprepare
  usb: otg: msm: Convert to clk_prepare/unprepare
  msm_serial: Use devm_clk_get() and properly return errors
  msm_serial: Convert to clk_prepare/unprepare
  ...

3 files changed, 115 insertions, 28 deletions

diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index b11e99797fd8..2c6cfb3cf032 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -408,9 +408,9 @@ static void msm_init_clock(struct uart_port *port)
 {
 	struct msm_port *msm_port = UART_TO_MSM(port);
 
-	clk_enable(msm_port->clk);
+	clk_prepare_enable(msm_port->clk);
 	if (!IS_ERR(msm_port->pclk))
-		clk_enable(msm_port->pclk);
+		clk_prepare_enable(msm_port->pclk);
 	msm_serial_set_mnd_regs(port);
 }
 
@@ -486,7 +486,7 @@ static void msm_shutdown(struct uart_port *port)
 	msm_port->imr = 0;
 	msm_write(port, 0, UART_IMR); /* disable interrupts */
 
-	clk_disable(msm_port->clk);
+	clk_disable_unprepare(msm_port->clk);
 
 	free_irq(port->irq, port);
 }
@@ -688,14 +688,14 @@ static void msm_power(struct uart_port *port, unsigned int state,
 
 	switch (state) {
 	case 0:
-		clk_enable(msm_port->clk);
+		clk_prepare_enable(msm_port->clk);
 		if (!IS_ERR(msm_port->pclk))
-			clk_enable(msm_port->pclk);
+			clk_prepare_enable(msm_port->pclk);
 		break;
 	case 3:
-		clk_disable(msm_port->clk);
+		clk_disable_unprepare(msm_port->clk);
 		if (!IS_ERR(msm_port->pclk))
-			clk_disable(msm_port->pclk);
+			clk_disable_unprepare(msm_port->pclk);
 		break;
 	default:
 		printk(KERN_ERR "msm_serial: Unknown PM state %d\n", state);
@@ -884,19 +884,22 @@ static int __init msm_serial_probe(struct platform_device *pdev)
 		msm_port->is_uartdm = 0;
 
 	if (msm_port->is_uartdm) {
-		msm_port->clk = clk_get(&pdev->dev, "gsbi_uart_clk");
-		msm_port->pclk = clk_get(&pdev->dev, "gsbi_pclk");
+		msm_port->clk = devm_clk_get(&pdev->dev, "gsbi_uart_clk");
+		msm_port->pclk = devm_clk_get(&pdev->dev, "gsbi_pclk");
 	} else {
-		msm_port->clk = clk_get(&pdev->dev, "uart_clk");
+		msm_port->clk = devm_clk_get(&pdev->dev, "uart_clk");
 		msm_port->pclk = ERR_PTR(-ENOENT);
 	}
 
-	if (unlikely(IS_ERR(msm_port->clk) || (IS_ERR(msm_port->pclk) &&
-					       msm_port->is_uartdm)))
-			return PTR_ERR(msm_port->clk);
+	if (IS_ERR(msm_port->clk))
+		return PTR_ERR(msm_port->clk);
+
+	if (msm_port->is_uartdm) {
+		if (IS_ERR(msm_port->pclk))
+			return PTR_ERR(msm_port->pclk);
 
-	if (msm_port->is_uartdm)
 		clk_set_rate(msm_port->clk, 1843200);
+	}
 
 	port->uartclk = clk_get_rate(msm_port->clk);
 	printk(KERN_INFO "uartclk = %d\n", port->uartclk);
@@ -919,9 +922,9 @@ static int __init msm_serial_probe(struct platform_device *pdev)
 
 static int msm_serial_remove(struct platform_device *pdev)
 {
-	struct msm_port *msm_port = platform_get_drvdata(pdev);
+	struct uart_port *port = platform_get_drvdata(pdev);
 
-	clk_put(msm_port->clk);
+	uart_remove_one_port(&msm_uart_driver, port);
 
 	return 0;
 }
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 81ebc86a9e23..376079b9bd75 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1713,9 +1713,7 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
 #define S5PV210_SERIAL_DRV_DATA	(kernel_ulong_t)NULL
 #endif
 
-#if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) || \
-	defined(CONFIG_SOC_EXYNOS4412) || defined(CONFIG_SOC_EXYNOS5250) || \
-	defined(CONFIG_SOC_EXYNOS5440)
+#if defined(CONFIG_ARCH_EXYNOS)
 static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = {
 	.info = &(struct s3c24xx_uart_info) {
 		.name		= "Samsung Exynos4 UART",
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 156418619949..7477e0ea5cdb 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -146,6 +146,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= sci_reg_invalid,
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -165,6 +166,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= sci_reg_invalid,
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -183,6 +185,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= sci_reg_invalid,
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -201,6 +204,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= { 0x3c, 16 },
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= sci_reg_invalid,
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -220,6 +224,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= { 0x20, 16 },
 		[SCLSR]		= { 0x24, 16 },
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -238,6 +243,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= sci_reg_invalid,
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -256,6 +262,26 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= { 0x20, 16 },
 		[SCLSR]		= { 0x24, 16 },
+		[HSSRR]		= sci_reg_invalid,
+	},
+
+	/*
+	 * Common HSCIF definitions.
+	 */
+	[SCIx_HSCIF_REGTYPE] = {
+		[SCSMR]		= { 0x00, 16 },
+		[SCBRR]		= { 0x04,  8 },
+		[SCSCR]		= { 0x08, 16 },
+		[SCxTDR]	= { 0x0c,  8 },
+		[SCxSR]		= { 0x10, 16 },
+		[SCxRDR]	= { 0x14,  8 },
+		[SCFCR]		= { 0x18, 16 },
+		[SCFDR]		= { 0x1c, 16 },
+		[SCTFDR]	= sci_reg_invalid,
+		[SCRFDR]	= sci_reg_invalid,
+		[SCSPTR]	= { 0x20, 16 },
+		[SCLSR]		= { 0x24, 16 },
+		[HSSRR]		= { 0x40, 16 },
 	},
 
 	/*
@@ -275,6 +301,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= { 0x24, 16 },
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -294,6 +321,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= { 0x20, 16 },
 		[SCSPTR]	= { 0x24, 16 },
 		[SCLSR]		= { 0x28, 16 },
+		[HSSRR]		= sci_reg_invalid,
 	},
 
 	/*
@@ -313,6 +341,7 @@ static struct plat_sci_reg sci_regmap[SCIx_NR_REGTYPES][SCIx_NR_REGS] = {
 		[SCRFDR]	= sci_reg_invalid,
 		[SCSPTR]	= sci_reg_invalid,
 		[SCLSR]		= sci_reg_invalid,
+		[HSSRR]		= sci_reg_invalid,
 	},
 };
 
@@ -374,6 +403,9 @@ static int sci_probe_regmap(struct plat_sci_port *cfg)
 		 */
 		cfg->regtype = SCIx_SH4_SCIF_REGTYPE;
 		break;
+	case PORT_HSCIF:
+		cfg->regtype = SCIx_HSCIF_REGTYPE;
+		break;
 	default:
 		printk(KERN_ERR "Can't probe register map for given port\n");
 		return -EINVAL;
@@ -1798,6 +1830,42 @@ static unsigned int sci_scbrr_calc(unsigned int algo_id, unsigned int bps,
 	return ((freq + 16 * bps) / (32 * bps) - 1);
 }
 
+/* calculate sample rate, BRR, and clock select for HSCIF */
+static void sci_baud_calc_hscif(unsigned int bps, unsigned long freq,
+				int *brr, unsigned int *srr,
+				unsigned int *cks)
+{
+	int sr, c, br, err;
+	int min_err = 1000; /* 100% */
+
+	/* Find the combination of sample rate and clock select with the
+	   smallest deviation from the desired baud rate. */
+	for (sr = 8; sr <= 32; sr++) {
+		for (c = 0; c <= 3; c++) {
+			/* integerized formulas from HSCIF documentation */
+			br = freq / (sr * (1 << (2 * c + 1)) * bps) - 1;
+			if (br < 0 || br > 255)
+				continue;
+			err = freq / ((br + 1) * bps * sr *
+			      (1 << (2 * c + 1)) / 1000) - 1000;
+			if (min_err > err) {
+				min_err = err;
+				*brr = br;
+				*srr = sr - 1;
+				*cks = c;
+			}
+		}
+	}
+
+	if (min_err == 1000) {
+		WARN_ON(1);
+		/* use defaults */
+		*brr = 255;
+		*srr = 15;
+		*cks = 0;
+	}
+}
+
 static void sci_reset(struct uart_port *port)
 {
 	struct plat_sci_reg *reg;
@@ -1819,8 +1887,9 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 {
 	struct sci_port *s = to_sci_port(port);
 	struct plat_sci_reg *reg;
-	unsigned int baud, smr_val, max_baud, cks;
+	unsigned int baud, smr_val, max_baud, cks = 0;
 	int t = -1;
+	unsigned int srr = 15;
 
 	/*
 	 * earlyprintk comes here early on with port->uartclk set to zero.
@@ -1833,8 +1902,17 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 	max_baud = port->uartclk ? port->uartclk / 16 : 115200;
 
 	baud = uart_get_baud_rate(port, termios, old, 0, max_baud);
-	if (likely(baud && port->uartclk))
-		t = sci_scbrr_calc(s->cfg->scbrr_algo_id, baud, port->uartclk);
+	if (likely(baud && port->uartclk)) {
+		if (s->cfg->scbrr_algo_id == SCBRR_ALGO_6) {
+			sci_baud_calc_hscif(baud, port->uartclk, &t, &srr,
+					    &cks);
+		} else {
+			t = sci_scbrr_calc(s->cfg->scbrr_algo_id, baud,
+					   port->uartclk);
+			for (cks = 0; t >= 256 && cks <= 3; cks++)
+				t >>= 2;
+		}
+	}
 
 	sci_port_enable(s);
 
@@ -1853,15 +1931,15 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
 
 	uart_update_timeout(port, termios->c_cflag, baud);
 
-	for (cks = 0; t >= 256 && cks <= 3; cks++)
-		t >>= 2;
-
 	dev_dbg(port->dev, "%s: SMR %x, cks %x, t %x, SCSCR %x\n",
 		__func__, smr_val, cks, t, s->cfg->scscr);
 
 	if (t >= 0) {
 		serial_port_out(port, SCSMR, (smr_val & ~3) | cks);
 		serial_port_out(port, SCBRR, t);
+		reg = sci_getreg(port, HSSRR);
+		if (reg->size)
+			serial_port_out(port, HSSRR, srr | HSCIF_SRE);
 		udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
 	} else
 		serial_port_out(port, SCSMR, smr_val);
@@ -1947,6 +2025,8 @@ static const char *sci_type(struct uart_port *port)
 		return "scifa";
 	case PORT_SCIFB:
 		return "scifb";
+	case PORT_HSCIF:
+		return "hscif";
 	}
 
 	return NULL;
@@ -1960,7 +2040,10 @@ static inline unsigned long sci_port_size(struct uart_port *port)
 	 * from platform resource data at such a time that ports begin to
 	 * behave more erratically.
 	 */
-	return 64;
+	if (port->type == PORT_HSCIF)
+		return 96;
+	else
+		return 64;
 }
 
 static int sci_remap_port(struct uart_port *port)
@@ -2085,6 +2168,9 @@ static int sci_init_single(struct platform_device *dev,
 	case PORT_SCIFB:
 		port->fifosize = 256;
 		break;
+	case PORT_HSCIF:
+		port->fifosize = 128;
+		break;
 	case PORT_SCIFA:
 		port->fifosize = 64;
 		break;
@@ -2325,7 +2411,7 @@ static inline int sci_probe_earlyprintk(struct platform_device *pdev)
 #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
 
 static char banner[] __initdata =
-	KERN_INFO "SuperH SCI(F) driver initialized\n";
+	KERN_INFO "SuperH (H)SCI(F) driver initialized\n";
 
 static struct uart_driver sci_uart_driver = {
 	.owner		= THIS_MODULE,
@@ -2484,4 +2570,4 @@ module_exit(sci_exit);
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:sh-sci");
 MODULE_AUTHOR("Paul Mundt");
-MODULE_DESCRIPTION("SuperH SCI(F) serial driver");
+MODULE_DESCRIPTION("SuperH (H)SCI(F) serial driver");