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pwm: sifive: Simplify offset calculation for PWMCMP registers
[ Upstream commit 20550a6188
]
Instead of explicitly using PWM_SIFIVE_PWMCMP0 + pwm->hwpwm *
PWM_SIFIVE_SIZE_PWMCMP for each access to one of the PWMCMP registers,
introduce a macro that takes the hwpwm id as parameter.
For the register definition using a plain 4 instead of the cpp constant
PWM_SIFIVE_SIZE_PWMCMP is easier to read, so define the offset macro
without the constant. The latter can then be dropped as there are no
users left.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
0d5cd27c73
commit
20ca00c745
1 changed files with 3 additions and 7 deletions
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@ -23,7 +23,7 @@
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#define PWM_SIFIVE_PWMCFG 0x0
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#define PWM_SIFIVE_PWMCOUNT 0x8
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#define PWM_SIFIVE_PWMS 0x10
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#define PWM_SIFIVE_PWMCMP0 0x20
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#define PWM_SIFIVE_PWMCMP(i) (0x20 + 4 * (i))
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/* PWMCFG fields */
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#define PWM_SIFIVE_PWMCFG_SCALE GENMASK(3, 0)
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@ -36,8 +36,6 @@
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#define PWM_SIFIVE_PWMCFG_GANG BIT(24)
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#define PWM_SIFIVE_PWMCFG_IP BIT(28)
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/* PWM_SIFIVE_SIZE_PWMCMP is used to calculate offset for pwmcmpX registers */
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#define PWM_SIFIVE_SIZE_PWMCMP 4
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#define PWM_SIFIVE_CMPWIDTH 16
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#define PWM_SIFIVE_DEFAULT_PERIOD 10000000
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@ -112,8 +110,7 @@ static void pwm_sifive_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
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struct pwm_sifive_ddata *ddata = pwm_sifive_chip_to_ddata(chip);
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u32 duty, val;
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duty = readl(ddata->regs + PWM_SIFIVE_PWMCMP0 +
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pwm->hwpwm * PWM_SIFIVE_SIZE_PWMCMP);
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duty = readl(ddata->regs + PWM_SIFIVE_PWMCMP(pwm->hwpwm));
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state->enabled = duty > 0;
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@ -194,8 +191,7 @@ static int pwm_sifive_apply(struct pwm_chip *chip, struct pwm_device *pwm,
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pwm_sifive_update_clock(ddata, clk_get_rate(ddata->clk));
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}
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writel(frac, ddata->regs + PWM_SIFIVE_PWMCMP0 +
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pwm->hwpwm * PWM_SIFIVE_SIZE_PWMCMP);
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writel(frac, ddata->regs + PWM_SIFIVE_PWMCMP(pwm->hwpwm));
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if (state->enabled != enabled)
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pwm_sifive_enable(chip, state->enabled);
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