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clocksource: sh_mtu2: Replace hardcoded register values with macros 

Define symbolic macros for all used registers bits.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Wolfram Sang <wsa@sang-engineering.com>
hifive-unleashed-5.1
Laurent Pinchart 2014-03-04 15:16:25 +01:00
parent c54ccb431c
commit f992c2410b
1 changed files with 92 additions and 6 deletions
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98
drivers/clocksource/sh_mtu2.c
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@ -67,6 +67,88 @@ static DEFINE_RAW_SPINLOCK(sh_mtu2_lock);
#define TCNT 5 /* channel register */
#define TGR 6 /* channel register */
#define TCR_CCLR_NONE (0 << 5)
#define TCR_CCLR_TGRA (1 << 5)
#define TCR_CCLR_TGRB (2 << 5)
#define TCR_CCLR_SYNC (3 << 5)
#define TCR_CCLR_TGRC (5 << 5)
#define TCR_CCLR_TGRD (6 << 5)
#define TCR_CCLR_MASK (7 << 5)
#define TCR_CKEG_RISING (0 << 3)
#define TCR_CKEG_FALLING (1 << 3)
#define TCR_CKEG_BOTH (2 << 3)
#define TCR_CKEG_MASK (3 << 3)
/* Values 4 to 7 are channel-dependent */
#define TCR_TPSC_P1 (0 << 0)
#define TCR_TPSC_P4 (1 << 0)
#define TCR_TPSC_P16 (2 << 0)
#define TCR_TPSC_P64 (3 << 0)
#define TCR_TPSC_CH0_TCLKA (4 << 0)
#define TCR_TPSC_CH0_TCLKB (5 << 0)
#define TCR_TPSC_CH0_TCLKC (6 << 0)
#define TCR_TPSC_CH0_TCLKD (7 << 0)
#define TCR_TPSC_CH1_TCLKA (4 << 0)
#define TCR_TPSC_CH1_TCLKB (5 << 0)
#define TCR_TPSC_CH1_P256 (6 << 0)
#define TCR_TPSC_CH1_TCNT2 (7 << 0)
#define TCR_TPSC_CH2_TCLKA (4 << 0)
#define TCR_TPSC_CH2_TCLKB (5 << 0)
#define TCR_TPSC_CH2_TCLKC (6 << 0)
#define TCR_TPSC_CH2_P1024 (7 << 0)
#define TCR_TPSC_CH34_P256 (4 << 0)
#define TCR_TPSC_CH34_P1024 (5 << 0)
#define TCR_TPSC_CH34_TCLKA (6 << 0)
#define TCR_TPSC_CH34_TCLKB (7 << 0)
#define TCR_TPSC_MASK (7 << 0)
#define TMDR_BFE (1 << 6)
#define TMDR_BFB (1 << 5)
#define TMDR_BFA (1 << 4)
#define TMDR_MD_NORMAL (0 << 0)
#define TMDR_MD_PWM_1 (2 << 0)
#define TMDR_MD_PWM_2 (3 << 0)
#define TMDR_MD_PHASE_1 (4 << 0)
#define TMDR_MD_PHASE_2 (5 << 0)
#define TMDR_MD_PHASE_3 (6 << 0)
#define TMDR_MD_PHASE_4 (7 << 0)
#define TMDR_MD_PWM_SYNC (8 << 0)
#define TMDR_MD_PWM_COMP_CREST (13 << 0)
#define TMDR_MD_PWM_COMP_TROUGH (14 << 0)
#define TMDR_MD_PWM_COMP_BOTH (15 << 0)
#define TMDR_MD_MASK (15 << 0)
#define TIOC_IOCH(n) ((n) << 4)
#define TIOC_IOCL(n) ((n) << 0)
#define TIOR_OC_RETAIN (0 << 0)
#define TIOR_OC_0_CLEAR (1 << 0)
#define TIOR_OC_0_SET (2 << 0)
#define TIOR_OC_0_TOGGLE (3 << 0)
#define TIOR_OC_1_CLEAR (5 << 0)
#define TIOR_OC_1_SET (6 << 0)
#define TIOR_OC_1_TOGGLE (7 << 0)
#define TIOR_IC_RISING (8 << 0)
#define TIOR_IC_FALLING (9 << 0)
#define TIOR_IC_BOTH (10 << 0)
#define TIOR_IC_TCNT (12 << 0)
#define TIOR_MASK (15 << 0)
#define TIER_TTGE (1 << 7)
#define TIER_TTGE2 (1 << 6)
#define TIER_TCIEU (1 << 5)
#define TIER_TCIEV (1 << 4)
#define TIER_TGIED (1 << 3)
#define TIER_TGIEC (1 << 2)
#define TIER_TGIEB (1 << 1)
#define TIER_TGIEA (1 << 0)
#define TSR_TCFD (1 << 7)
#define TSR_TCFU (1 << 5)
#define TSR_TCFV (1 << 4)
#define TSR_TGFD (1 << 3)
#define TSR_TGFC (1 << 2)
#define TSR_TGFB (1 << 1)
#define TSR_TGFA (1 << 0)
static unsigned long mtu2_reg_offs[] = {
[TCR] = 0,
[TMDR] = 1,
@ -150,13 +232,17 @@ static int sh_mtu2_enable(struct sh_mtu2_channel *ch)
rate = clk_get_rate(ch->mtu->clk) / 64;
periodic = (rate + HZ/2) / HZ;
/* "Periodic Counter Operation" */
sh_mtu2_write(ch, TCR, 0x23); /* TGRA clear, divide clock by 64 */
sh_mtu2_write(ch, TIOR, 0);
/*
* "Periodic Counter Operation"
* Clear on TGRA compare match, divide clock by 64.
*/
sh_mtu2_write(ch, TCR, TCR_CCLR_TGRA | TCR_TPSC_P64);
sh_mtu2_write(ch, TIOR, TIOC_IOCH(TIOR_OC_0_CLEAR) |
TIOC_IOCL(TIOR_OC_0_CLEAR));
sh_mtu2_write(ch, TGR, periodic);
sh_mtu2_write(ch, TCNT, 0);
sh_mtu2_write(ch, TMDR, 0);
sh_mtu2_write(ch, TIER, 0x01);
sh_mtu2_write(ch, TMDR, TMDR_MD_NORMAL);
sh_mtu2_write(ch, TIER, TIER_TGIEA);
/* enable channel */
sh_mtu2_start_stop_ch(ch, 1);
@ -182,7 +268,7 @@ static irqreturn_t sh_mtu2_interrupt(int irq, void *dev_id)
/* acknowledge interrupt */
sh_mtu2_read(ch, TSR);
sh_mtu2_write(ch, TSR, 0xfe);
sh_mtu2_write(ch, TSR, ~TSR_TGFA);
/* notify clockevent layer */
ch->ced.event_handler(&ch->ced);