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imx: timer: Modify GPT timer driver for mx7

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Modify the GPT common platform driver for mx7 which only use 24Mhz
OSC as clock source.

Note: at default, the mx7d will use system counter as timer. The GPT
is disabled.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2018-03-22 23:45:26 -07:00 • committed by Stefano Babic
parent d4e84f24a6
commit 8cd2017981
1 changed files with 9 additions and 7 deletions
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16
arch/arm/mach-imx/timer.c
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@ -39,18 +39,16 @@ static struct mxc_gpt *cur_gpt = (struct mxc_gpt *)GPT1_BASE_ADDR;
#define GPTPR_PRESCALER24M_SHIFT 12
#define GPTPR_PRESCALER24M_MASK (0xF << GPTPR_PRESCALER24M_SHIFT)
DECLARE_GLOBAL_DATA_PTR;
static inline int gpt_has_clk_source_osc(void)
{
#if defined(CONFIG_MX6)
if (((is_mx6dq()) && (soc_rev() > CHIP_REV_1_0)) ||
is_mx6dqp() || is_mx6sdl() || is_mx6sx() || is_mx6ul() ||
is_mx6ull() || is_mx6sll())
is_mx6ull() || is_mx6sll() || is_mx7())
return 1;
return 0;
#else
return 0;
#endif
}
static inline ulong gpt_get_clk(void)
@ -73,7 +71,8 @@ int timer_init(void)
__raw_writel(GPTCR_SWR, &cur_gpt->control);
/* We have no udelay by now */
__raw_writel(0, &cur_gpt->control);
for (i = 0; i < 100; i++)
__raw_writel(0, &cur_gpt->control);
i = __raw_readl(&cur_gpt->control);
i &= ~GPTCR_CLKSOURCE_MASK;
@ -87,7 +86,7 @@ int timer_init(void)
* Enable bit and prescaler
*/
if (is_mx6sdl() || is_mx6sx() || is_mx6ul() || is_mx6ull() ||
is_mx6sll()) {
is_mx6sll() || is_mx7()) {
i |= GPTCR_24MEN;
/* Produce 3Mhz clock */
@ -103,6 +102,9 @@ int timer_init(void)
#endif
__raw_writel(i, &cur_gpt->control);
gd->arch.tbl = __raw_readl(&cur_gpt->counter);
gd->arch.tbu = 0;
return 0;
}