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authorLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 18:49:36 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 18:49:36 -0800
commit0ba3307a8ec35252f7b1e222e32889a6f3d9ceb3 (patch)
tree26126ed7a2080a706f0488c215549fc9f5f76a59 /drivers/tty
parent903a9f77d1d00c8621bc37afd959ac45a4b3ebec (diff)
parentcd2f43a1f7400a74a084094502f70df2e169c6e8 (diff)
downloadlinux-0ba3307a8ec35252f7b1e222e32889a6f3d9ceb3.tar.bz2
Merge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM driver updates from Olof Johansson: "Updates of SoC-near drivers and other driver updates that makes more sense to take through our tree. The largest part of this is a conversion of device registration for some renesas shmobile/sh devices over to use resources. This has required coordination with the corresponding arch/sh changes, and we've agreed to merge the arch/sh changes through our tree. Added in this branch is support for Trusted Foundations secure firmware, which is what is used on many of the commercial Nvidia Tegra products that are in the market, including the Nvidia Shield. The code is local to arch/arm at this time since it's uncertain whether it will be shared with arm64 longer-term, if needed we will refactor later. A couple of new RTC drivers used on ARM boards, merged through our tree on request by the RTC maintainer. ... plus a bunch of smaller updates across the board, gpio conversions for davinci, etc" * tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (45 commits) watchdog: davinci: rename platform driver to davinci-wdt tty: serial: Limit msm_serial_hs driver to platforms that use it mmc: msm_sdcc: Limit driver to platforms that use it usb: phy: msm: Move mach dependent code to platform data clk: versatile: fixup IM-PD1 clock implementation clk: versatile: pass a name to ICST clock provider ARM: integrator: pass parent IRQ to the SIC irqchip: versatile FPGA: support cascaded interrupts from DT gpio: davinci: don't create irq_domain in case of unbanked irqs gpio: davinci: use chained_irq_enter/chained_irq_exit API gpio: davinci: add OF support gpio: davinci: remove unused variable intc_irq_num gpio: davinci: convert to use irqdomain support. gpio: introduce GPIO_DAVINCI kconfig option gpio: davinci: get rid of DAVINCI_N_GPIO gpio: davinci: use {readl|writel}_relaxed() instead of __raw_* serial: sh-sci: Add OF support serial: sh-sci: Add device tree bindings documentation serial: sh-sci: Remove platform data mapbase and irqs fields serial: sh-sci: Remove platform data scbrr_algo_id field ...
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/Kconfig2
-rw-r--r--drivers/tty/serial/sh-sci.c187
2 files changed, 138 insertions, 51 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 441ada489874..a3815eaed421 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1034,7 +1034,7 @@ config SERIAL_MSM_CONSOLE
config SERIAL_MSM_HS
tristate "MSM UART High Speed: Serial Driver"
- depends on ARCH_MSM
+ depends on ARCH_MSM7X00A || ARCH_MSM7X30 || ARCH_QSD8X50
select SERIAL_CORE
help
If you have a machine based on MSM family of SoCs, you
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index e4bf0e435af6..be33d2b0613b 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -39,6 +39,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/notifier.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
@@ -58,6 +59,23 @@
#include "sh-sci.h"
+/* Offsets into the sci_port->irqs array */
+enum {
+ SCIx_ERI_IRQ,
+ SCIx_RXI_IRQ,
+ SCIx_TXI_IRQ,
+ SCIx_BRI_IRQ,
+ SCIx_NR_IRQS,
+
+ SCIx_MUX_IRQ = SCIx_NR_IRQS, /* special case */
+};
+
+#define SCIx_IRQ_IS_MUXED(port) \
+ ((port)->irqs[SCIx_ERI_IRQ] == \
+ (port)->irqs[SCIx_RXI_IRQ]) || \
+ ((port)->irqs[SCIx_ERI_IRQ] && \
+ ((port)->irqs[SCIx_RXI_IRQ] < 0))
+
struct sci_port {
struct uart_port port;
@@ -1757,17 +1775,6 @@ static unsigned int sci_scbrr_calc(struct sci_port *s, unsigned int bps,
if (s->sampling_rate)
return DIV_ROUND_CLOSEST(freq, s->sampling_rate * bps) - 1;
- switch (s->cfg->scbrr_algo_id) {
- case SCBRR_ALGO_1:
- return freq / (16 * bps);
- case SCBRR_ALGO_2:
- return DIV_ROUND_CLOSEST(freq, 32 * bps) - 1;
- case SCBRR_ALGO_3:
- return freq / (8 * bps);
- case SCBRR_ALGO_4:
- return DIV_ROUND_CLOSEST(freq, 16 * bps) - 1;
- }
-
/* Warn, but use a safe default */
WARN_ON(1);
@@ -2105,36 +2112,27 @@ static int sci_init_single(struct platform_device *dev,
port->iotype = UPIO_MEM;
port->line = index;
- if (dev->num_resources) {
- /* Device has resources, use them. */
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (res == NULL)
- return -ENOMEM;
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (res == NULL)
+ return -ENOMEM;
- port->mapbase = res->start;
+ port->mapbase = res->start;
- for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i)
- sci_port->irqs[i] = platform_get_irq(dev, i);
+ for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i)
+ sci_port->irqs[i] = platform_get_irq(dev, i);
- /* The SCI generates several interrupts. They can be muxed
- * together or connected to different interrupt lines. In the
- * muxed case only one interrupt resource is specified. In the
- * non-muxed case three or four interrupt resources are
- * specified, as the BRI interrupt is optional.
- */
- if (sci_port->irqs[0] < 0)
- return -ENXIO;
+ /* The SCI generates several interrupts. They can be muxed together or
+ * connected to different interrupt lines. In the muxed case only one
+ * interrupt resource is specified. In the non-muxed case three or four
+ * interrupt resources are specified, as the BRI interrupt is optional.
+ */
+ if (sci_port->irqs[0] < 0)
+ return -ENXIO;
- if (sci_port->irqs[1] < 0) {
- sci_port->irqs[1] = sci_port->irqs[0];
- sci_port->irqs[2] = sci_port->irqs[0];
- sci_port->irqs[3] = sci_port->irqs[0];
- }
- } else {
- /* No resources, use old-style platform data. */
- port->mapbase = p->mapbase;
- for (i = 0; i < ARRAY_SIZE(sci_port->irqs); ++i)
- sci_port->irqs[i] = p->irqs[i] ? p->irqs[i] : -ENXIO;
+ if (sci_port->irqs[1] < 0) {
+ sci_port->irqs[1] = sci_port->irqs[0];
+ sci_port->irqs[2] = sci_port->irqs[0];
+ sci_port->irqs[3] = sci_port->irqs[0];
}
if (p->regtype == SCIx_PROBE_REGTYPE) {
@@ -2176,17 +2174,12 @@ static int sci_init_single(struct platform_device *dev,
break;
}
- /* Set the sampling rate if the baud rate calculation algorithm isn't
- * specified.
+ /* SCIFA on sh7723 and sh7724 need a custom sampling rate that doesn't
+ * match the SoC datasheet, this should be investigated. Let platform
+ * data override the sampling rate for now.
*/
- if (p->scbrr_algo_id == SCBRR_ALGO_NONE) {
- /* SCIFA on sh7723 and sh7724 need a custom sampling rate that
- * doesn't match the SoC datasheet, this should be investigated.
- * Let platform data override the sampling rate for now.
- */
- sci_port->sampling_rate = p->sampling_rate ? p->sampling_rate
- : sampling_rate;
- }
+ sci_port->sampling_rate = p->sampling_rate ? p->sampling_rate
+ : sampling_rate;
if (!early) {
sci_port->iclk = clk_get(&dev->dev, "sci_ick");
@@ -2423,6 +2416,83 @@ static int sci_remove(struct platform_device *dev)
return 0;
}
+struct sci_port_info {
+ unsigned int type;
+ unsigned int regtype;
+};
+
+static const struct of_device_id of_sci_match[] = {
+ {
+ .compatible = "renesas,scif",
+ .data = (void *)&(const struct sci_port_info) {
+ .type = PORT_SCIF,
+ .regtype = SCIx_SH4_SCIF_REGTYPE,
+ },
+ }, {
+ .compatible = "renesas,scifa",
+ .data = (void *)&(const struct sci_port_info) {
+ .type = PORT_SCIFA,
+ .regtype = SCIx_SCIFA_REGTYPE,
+ },
+ }, {
+ .compatible = "renesas,scifb",
+ .data = (void *)&(const struct sci_port_info) {
+ .type = PORT_SCIFB,
+ .regtype = SCIx_SCIFB_REGTYPE,
+ },
+ }, {
+ .compatible = "renesas,hscif",
+ .data = (void *)&(const struct sci_port_info) {
+ .type = PORT_HSCIF,
+ .regtype = SCIx_HSCIF_REGTYPE,
+ },
+ }, {
+ /* Terminator */
+ },
+};
+MODULE_DEVICE_TABLE(of, of_sci_match);
+
+static struct plat_sci_port *
+sci_parse_dt(struct platform_device *pdev, unsigned int *dev_id)
+{
+ struct device_node *np = pdev->dev.of_node;
+ const struct of_device_id *match;
+ const struct sci_port_info *info;
+ struct plat_sci_port *p;
+ int id;
+
+ if (!IS_ENABLED(CONFIG_OF) || !np)
+ return NULL;
+
+ match = of_match_node(of_sci_match, pdev->dev.of_node);
+ if (!match)
+ return NULL;
+
+ info = match->data;
+
+ p = devm_kzalloc(&pdev->dev, sizeof(struct plat_sci_port), GFP_KERNEL);
+ if (!p) {
+ dev_err(&pdev->dev, "failed to allocate DT config data\n");
+ return NULL;
+ }
+
+ /* Get the line number for the aliases node. */
+ id = of_alias_get_id(np, "serial");
+ if (id < 0) {
+ dev_err(&pdev->dev, "failed to get alias id (%d)\n", id);
+ return NULL;
+ }
+
+ *dev_id = id;
+
+ p->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
+ p->type = info->type;
+ p->regtype = info->regtype;
+ p->scscr = SCSCR_RE | SCSCR_TE;
+
+ return p;
+}
+
static int sci_probe_single(struct platform_device *dev,
unsigned int index,
struct plat_sci_port *p,
@@ -2455,8 +2525,9 @@ static int sci_probe_single(struct platform_device *dev,
static int sci_probe(struct platform_device *dev)
{
- struct plat_sci_port *p = dev_get_platdata(&dev->dev);
- struct sci_port *sp = &sci_ports[dev->id];
+ struct plat_sci_port *p;
+ struct sci_port *sp;
+ unsigned int dev_id;
int ret;
/*
@@ -2467,9 +2538,24 @@ static int sci_probe(struct platform_device *dev)
if (is_early_platform_device(dev))
return sci_probe_earlyprintk(dev);
+ if (dev->dev.of_node) {
+ p = sci_parse_dt(dev, &dev_id);
+ if (p == NULL)
+ return -EINVAL;
+ } else {
+ p = dev->dev.platform_data;
+ if (p == NULL) {
+ dev_err(&dev->dev, "no platform data supplied\n");
+ return -EINVAL;
+ }
+
+ dev_id = dev->id;
+ }
+
+ sp = &sci_ports[dev_id];
platform_set_drvdata(dev, sp);
- ret = sci_probe_single(dev, dev->id, p, sp);
+ ret = sci_probe_single(dev, dev_id, p, sp);
if (ret)
return ret;
@@ -2521,6 +2607,7 @@ static struct platform_driver sci_driver = {
.name = "sh-sci",
.owner = THIS_MODULE,
.pm = &sci_dev_pm_ops,
+ .of_match_table = of_match_ptr(of_sci_match),
},
};