Hi Mugunthan,
On Fri, Nov 27, 2015 at 4:31 PM, Mugunthan V N mugunthanvnm@ti.com wrote:
Adding a timer driver for omap devices based on driver model and device tree.
Signed-off-by: Mugunthan V N mugunthanvnm@ti.com
drivers/timer/Kconfig | 6 +++ drivers/timer/Makefile | 1 + drivers/timer/omap-timer.c | 108 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 115 insertions(+) create mode 100644 drivers/timer/omap-timer.c
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig index 601e493..98ba012 100644 --- a/drivers/timer/Kconfig +++ b/drivers/timer/Kconfig @@ -23,4 +23,10 @@ config SANDBOX_TIMER Select this to enable an emulated timer for sandbox. It gets time from host os.
+config OMAP_TIMER
bool "Omap Timer support"
nits: Timer -> timer. Please see dm/master branch which has a commit to fix all these nits in the existing timer drivers.
depends on TIMERhelpSelect this to enable an timer for Omap devices.endmenu diff --git a/drivers/timer/Makefile b/drivers/timer/Makefile index 300946e..2eb9cfc 100644 --- a/drivers/timer/Makefile +++ b/drivers/timer/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_TIMER) += timer-uclass.o obj-$(CONFIG_ALTERA_TIMER) += altera_timer.o obj-$(CONFIG_SANDBOX_TIMER) += sandbox_timer.o +obj-$(CONFIG_OMAP_TIMER) += omap-timer.o diff --git a/drivers/timer/omap-timer.c b/drivers/timer/omap-timer.c new file mode 100644 index 0000000..2532e74 --- /dev/null +++ b/drivers/timer/omap-timer.c @@ -0,0 +1,108 @@ +/*
- TI OMAP Timer driver
nits: Timer -> timer
- Copyright (C) 2015, Texas Instruments, Incorporated
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <dm.h> +#include <errno.h> +#include <timer.h> +#include <asm/io.h> +#include <asm/arch/clock.h>
+DECLARE_GLOBAL_DATA_PTR;
+/* Timer register bits */ +#define TCLR_START BIT(0) /* Start=1 */ +#define TCLR_AUTO_RELOAD BIT(1) /* Auto reload */ +#define TCLR_PRE_EN BIT(5) /* Pre-scaler enable */ +#define TCLR_PTV_SHIFT (2) /* Pre-scaler shift value */
+#define TIMER_CLOCK (V_SCLK / (2 << CONFIG_SYS_PTV))
+struct omap_gptimer_regs {
unsigned int tidr; /* offset 0x00 */unsigned char res1[12];unsigned int tiocp_cfg; /* offset 0x10 */unsigned char res2[12];unsigned int tier; /* offset 0x20 */unsigned int tistatr; /* offset 0x24 */unsigned int tistat; /* offset 0x28 */unsigned int tisr; /* offset 0x2c */unsigned int tcicr; /* offset 0x30 */unsigned int twer; /* offset 0x34 */unsigned int tclr; /* offset 0x38 */unsigned int tcrr; /* offset 0x3c */unsigned int tldr; /* offset 0x40 */unsigned int ttgr; /* offset 0x44 */unsigned int twpc; /* offset 0x48 */unsigned int tmar; /* offset 0x4c */unsigned int tcar1; /* offset 0x50 */unsigned int tscir; /* offset 0x54 */unsigned int tcar2; /* offset 0x58 */+};
+/* Omap Timer Priv */ +struct omap_timer_priv {
struct omap_gptimer_regs *regs;+};
+static int omap_timer_get_count(struct udevice *dev, unsigned long *count)
Please rebase your series on top of dm/master, where this API parameter 'count' has been changed to u64.
+{
struct omap_timer_priv *priv = dev_get_priv(dev);*count = readl(&priv->regs->tcrr);return 0;+}
+static int omap_timer_probe(struct udevice *dev) +{
struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);struct omap_timer_priv *priv = dev_get_priv(dev);uc_priv->clock_rate = TIMER_CLOCK;/* start the counter ticking up, reload value on overflow */writel(0, &priv->regs->tldr);/* enable timer */writel((CONFIG_SYS_PTV << 2) | TCLR_PRE_EN | TCLR_AUTO_RELOAD |TCLR_START, &priv->regs->tclr);return 0;+}
+static int omap_timer_ofdata_to_platdata(struct udevice *dev) +{
struct omap_timer_priv *priv = dev_get_priv(dev);priv->regs = (struct omap_gptimer_regs *)dev_get_addr(dev);return 0;+}
+static const struct timer_ops omap_timer_ops = {
.get_count = omap_timer_get_count,+};
+static const struct udevice_id omap_timer_ids[] = {
{ .compatible = "ti,am335x-timer" },{ .compatible = "ti,am4372-timer" },{ .compatible = "ti,omap5430-timer" },{}+};
+U_BOOT_DRIVER(omap_timer) = {
.name = "omap_timer",.id = UCLASS_TIMER,.of_match = omap_timer_ids,.ofdata_to_platdata = omap_timer_ofdata_to_platdata,.priv_auto_alloc_size = sizeof(struct omap_timer_priv),.probe = omap_timer_probe,.ops = &omap_timer_ops,.flags = DM_FLAG_PRE_RELOC,+};
Regards, Bin