sunxi: add support for H6 boards and OrangePiOnePlus

Specifications:

SoC	Allwinner H6 @ 1.8 Ghz
DRAM	1Gb LPDDR3
Power	DC 5V @ 3A
Video	HDMI (Type 2.0A - full)
Audio	HDMI, on-board microphone
Network	10/100/1000Mbps Ethernet (Realtek RTL8211)
Storage	microSD
USB	1 USB2.0 Host, 1 USB2.0 OTG
Debug	Serial UART

Flashing instructions:
 Standard sunxi SD card installation procedure - copy image to SD card,
 insert into SD card slot on the device and boot.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

1 files changed, 400 insertions, 0 deletions

diff --git a/target/linux/sunxi/patches-5.4/440-add-h6-pwm.patch b/target/linux/sunxi/patches-5.4/440-add-h6-pwm.patch
new file mode 100644
index 0000000000..64ffd719ac
--- /dev/null
+++ b/target/linux/sunxi/patches-5.4/440-add-h6-pwm.patch
@@ -0,0 +1,400 @@
+diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
+index 581d23287333..487899d4cc3f 100644
+--- a/drivers/pwm/pwm-sun4i.c
++++ b/drivers/pwm/pwm-sun4i.c
+@@ -16,6 +16,7 @@
+ #include <linux/of_device.h>
+ #include <linux/platform_device.h>
+ #include <linux/pwm.h>
++#include <linux/reset.h>
+ #include <linux/slab.h>
+ #include <linux/spinlock.h>
+ #include <linux/time.h>
+@@ -78,6 +79,7 @@ struct sun4i_pwm_data {
+ struct sun4i_pwm_chip {
+ 	struct pwm_chip chip;
+ 	struct clk *clk;
++	struct reset_control *rst;
+ 	void __iomem *base;
+ 	spinlock_t ctrl_lock;
+ 	const struct sun4i_pwm_data *data;
+@@ -364,6 +366,22 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
+ 	if (IS_ERR(pwm->clk))
+ 		return PTR_ERR(pwm->clk);
+ 
++	pwm->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
++	if (IS_ERR(pwm->rst)) {
++		if (PTR_ERR(pwm->rst) != -EPROBE_DEFER)
++			dev_err(&pdev->dev, "get reset failed %pe\n",
++				pwm->rst);
++		return PTR_ERR(pwm->rst);
++	}
++
++	/* Deassert reset */
++	ret = reset_control_deassert(pwm->rst);
++	if (ret) {
++		dev_err(&pdev->dev, "cannot deassert reset control: %pe\n",
++			ERR_PTR(ret));
++		return ret;
++	}
++
+ 	pwm->chip.dev = &pdev->dev;
+ 	pwm->chip.ops = &sun4i_pwm_ops;
+ 	pwm->chip.base = -1;
+@@ -376,19 +394,31 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
+ 	ret = pwmchip_add(&pwm->chip);
+ 	if (ret < 0) {
+ 		dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
+-		return ret;
++		goto err_pwm_add;
+ 	}
+ 
+ 	platform_set_drvdata(pdev, pwm);
+ 
+ 	return 0;
++
++err_pwm_add:
++	reset_control_assert(pwm->rst);
++
++	return ret;
+ }
+ 
+ static int sun4i_pwm_remove(struct platform_device *pdev)
+ {
+ 	struct sun4i_pwm_chip *pwm = platform_get_drvdata(pdev);
++	int ret;
++
++	ret = pwmchip_remove(&pwm->chip);
++	if (ret)
++		return ret;
++
++	reset_control_assert(pwm->rst);
+ 
+-	return pwmchip_remove(&pwm->chip);
++	return 0;
+ }
+ 
+ static struct platform_driver sun4i_pwm_driver = {
+
+diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
+index 487899d4cc3f..80026167044b 100644
+--- a/drivers/pwm/pwm-sun4i.c
++++ b/drivers/pwm/pwm-sun4i.c
+@@ -362,9 +362,34 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
+ 	if (IS_ERR(pwm->base))
+ 		return PTR_ERR(pwm->base);
+ 
+-	pwm->clk = devm_clk_get(&pdev->dev, NULL);
+-	if (IS_ERR(pwm->clk))
++	/*
++	 * All hardware variants need a source clock that is divided and
++	 * then feeds the counter that defines the output wave form. In the
++	 * device tree this clock is either unnamed or called "mod".
++	 * Some variants (e.g. H6) need another clock to access the
++	 * hardware registers; this is called "bus".
++	 * So we request "mod" first (and ignore the corner case that a
++	 * parent provides a "mod" clock while the right one would be the
++	 * unnamed one of the PWM device) and if this is not found we fall
++	 * back to the first clock of the PWM.
++	 */
++	pwm->clk = devm_clk_get_optional(&pdev->dev, "mod");
++	if (IS_ERR(pwm->clk)) {
++		if (PTR_ERR(pwm->rst) != -EPROBE_DEFER)
++			dev_err(&pdev->dev, "get mod clock failed %pe\n",
++				pwm->clk);
+ 		return PTR_ERR(pwm->clk);
++	}
++
++	if (!pwm->clk) {
++		pwm->clk = devm_clk_get(&pdev->dev, NULL);
++		if (IS_ERR(pwm->clk)) {
++			if (PTR_ERR(pwm->rst) != -EPROBE_DEFER)
++				dev_err(&pdev->dev, "get unnamed clock failed %pe\n",
++					pwm->clk);
++			return PTR_ERR(pwm->clk);
++		}
++	}
+ 
+ 	pwm->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
+ 	if (IS_ERR(pwm->rst)) {
+
+diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
+index 80026167044b..a6727dd89e28 100644
+--- a/drivers/pwm/pwm-sun4i.c
++++ b/drivers/pwm/pwm-sun4i.c
+@@ -78,6 +78,7 @@ struct sun4i_pwm_data {
+ 
+ struct sun4i_pwm_chip {
+ 	struct pwm_chip chip;
++	struct clk *bus_clk;
+ 	struct clk *clk;
+ 	struct reset_control *rst;
+ 	void __iomem *base;
+@@ -391,6 +392,14 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
+ 		}
+ 	}
+ 
++	pwm->bus_clk = devm_clk_get_optional(&pdev->dev, "bus");
++	if (IS_ERR(pwm->bus_clk)) {
++		if (PTR_ERR(pwm->rst) != -EPROBE_DEFER)
++			dev_err(&pdev->dev, "get bus clock failed %pe\n",
++				pwm->bus_clk);
++		return PTR_ERR(pwm->bus_clk);
++	}
++
+ 	pwm->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
+ 	if (IS_ERR(pwm->rst)) {
+ 		if (PTR_ERR(pwm->rst) != -EPROBE_DEFER)
+@@ -407,6 +416,17 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
+ 		return ret;
+ 	}
+ 
++	/*
++	 * We're keeping the bus clock on for the sake of simplicity.
++	 * Actually it only needs to be on for hardware register accesses.
++	 */
++	ret = clk_prepare_enable(pwm->bus_clk);
++	if (ret) {
++		dev_err(&pdev->dev, "cannot prepare and enable bus_clk %pe\n",
++			ERR_PTR(ret));
++		goto err_bus;
++	}
++
+ 	pwm->chip.dev = &pdev->dev;
+ 	pwm->chip.ops = &sun4i_pwm_ops;
+ 	pwm->chip.base = -1;
+@@ -427,6 +447,8 @@ static int sun4i_pwm_probe(struct platform_device *pdev)
+ 	return 0;
+ 
+ err_pwm_add:
++	clk_disable_unprepare(pwm->bus_clk);
++err_bus:
+ 	reset_control_assert(pwm->rst);
+ 
+ 	return ret;
+@@ -441,6 +463,7 @@ static int sun4i_pwm_remove(struct platform_device *pdev)
+ 	if (ret)
+ 		return ret;
+ 
++	clk_disable_unprepare(pwm->bus_clk);
+ 	reset_control_assert(pwm->rst);
+ 
+ 	return 0;
+
+diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
+index a6727dd89e28..e369b5a398f4 100644
+--- a/drivers/pwm/pwm-sun4i.c
++++ b/drivers/pwm/pwm-sun4i.c
+@@ -202,9 +202,9 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ {
+ 	struct sun4i_pwm_chip *sun4i_pwm = to_sun4i_pwm_chip(chip);
+ 	struct pwm_state cstate;
+-	u32 ctrl;
++	u32 ctrl, duty, period, val;
+ 	int ret;
+-	unsigned int delay_us;
++	unsigned int delay_us, prescaler;
+ 	unsigned long now;
+ 
+ 	pwm_get_state(pwm, &cstate);
+@@ -220,43 +220,37 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ 	spin_lock(&sun4i_pwm->ctrl_lock);
+ 	ctrl = sun4i_pwm_readl(sun4i_pwm, PWM_CTRL_REG);
+ 
+-	if ((cstate.period != state->period) ||
+-	    (cstate.duty_cycle != state->duty_cycle)) {
+-		u32 period, duty, val;
+-		unsigned int prescaler;
+-
+-		ret = sun4i_pwm_calculate(sun4i_pwm, state,
+-					  &duty, &period, &prescaler);
+-		if (ret) {
+-			dev_err(chip->dev, "period exceeds the maximum value\n");
+-			spin_unlock(&sun4i_pwm->ctrl_lock);
+-			if (!cstate.enabled)
+-				clk_disable_unprepare(sun4i_pwm->clk);
+-			return ret;
+-		}
+-
+-		if (PWM_REG_PRESCAL(ctrl, pwm->hwpwm) != prescaler) {
+-			/* Prescaler changed, the clock has to be gated */
+-			ctrl &= ~BIT_CH(PWM_CLK_GATING, pwm->hwpwm);
+-			sun4i_pwm_writel(sun4i_pwm, ctrl, PWM_CTRL_REG);
++	ret = sun4i_pwm_calculate(sun4i_pwm, state, &duty, &period, &prescaler);
++	if (ret) {
++		dev_err(chip->dev, "period exceeds the maximum value\n");
++		spin_unlock(&sun4i_pwm->ctrl_lock);
++		if (!cstate.enabled)
++			clk_disable_unprepare(sun4i_pwm->clk);
++		return ret;
++	}
+ 
+-			ctrl &= ~BIT_CH(PWM_PRESCAL_MASK, pwm->hwpwm);
+-			ctrl |= BIT_CH(prescaler, pwm->hwpwm);
+-		}
++	if (PWM_REG_PRESCAL(ctrl, pwm->hwpwm) != prescaler) {
++		/* Prescaler changed, the clock has to be gated */
++		ctrl &= ~BIT_CH(PWM_CLK_GATING, pwm->hwpwm);
++		sun4i_pwm_writel(sun4i_pwm, ctrl, PWM_CTRL_REG);
+ 
+-		val = (duty & PWM_DTY_MASK) | PWM_PRD(period);
+-		sun4i_pwm_writel(sun4i_pwm, val, PWM_CH_PRD(pwm->hwpwm));
+-		sun4i_pwm->next_period[pwm->hwpwm] = jiffies +
+-			usecs_to_jiffies(cstate.period / 1000 + 1);
+-		sun4i_pwm->needs_delay[pwm->hwpwm] = true;
++		ctrl &= ~BIT_CH(PWM_PRESCAL_MASK, pwm->hwpwm);
++		ctrl |= BIT_CH(prescaler, pwm->hwpwm);
+ 	}
+ 
++	val = (duty & PWM_DTY_MASK) | PWM_PRD(period);
++	sun4i_pwm_writel(sun4i_pwm, val, PWM_CH_PRD(pwm->hwpwm));
++	sun4i_pwm->next_period[pwm->hwpwm] = jiffies +
++		usecs_to_jiffies(cstate.period / 1000 + 1);
++	sun4i_pwm->needs_delay[pwm->hwpwm] = true;
++
+ 	if (state->polarity != PWM_POLARITY_NORMAL)
+ 		ctrl &= ~BIT_CH(PWM_ACT_STATE, pwm->hwpwm);
+ 	else
+ 		ctrl |= BIT_CH(PWM_ACT_STATE, pwm->hwpwm);
+ 
+ 	ctrl |= BIT_CH(PWM_CLK_GATING, pwm->hwpwm);
++
+ 	if (state->enabled) {
+ 		ctrl |= BIT_CH(PWM_EN, pwm->hwpwm);
+ 	} else if (!sun4i_pwm->needs_delay[pwm->hwpwm]) {
+
+diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
+index e369b5a398f4..07bf7be6074b 100644
+--- a/drivers/pwm/pwm-sun4i.c
++++ b/drivers/pwm/pwm-sun4i.c
+@@ -3,6 +3,10 @@
+  * Driver for Allwinner sun4i Pulse Width Modulation Controller
+  *
+  * Copyright (C) 2014 Alexandre Belloni <alexandre.belloni@free-electrons.com>
++ *
++ * Limitations:
++ * - When outputing the source clock directly, the PWM logic will be bypassed
++ *   and the currently running period is not guaranteed to be completed
+  */
+ 
+ #include <linux/bitops.h>
+@@ -73,6 +77,7 @@ static const u32 prescaler_table[] = {
+ 
+ struct sun4i_pwm_data {
+ 	bool has_prescaler_bypass;
++	bool has_direct_mod_clk_output;
+ 	unsigned int npwm;
+ };
+ 
+@@ -118,6 +123,20 @@ static void sun4i_pwm_get_state(struct pwm_chip *chip,
+ 
+ 	val = sun4i_pwm_readl(sun4i_pwm, PWM_CTRL_REG);
+ 
++	/*
++	 * PWM chapter in H6 manual has a diagram which explains that if bypass
++	 * bit is set, no other setting has any meaning. Even more, experiment
++	 * proved that also enable bit is ignored in this case.
++	 */
++	if ((val & BIT_CH(PWM_BYPASS, pwm->hwpwm)) &&
++	    sun4i_pwm->data->has_direct_mod_clk_output) {
++		state->period = DIV_ROUND_UP_ULL(NSEC_PER_SEC, clk_rate);
++		state->duty_cycle = DIV_ROUND_UP_ULL(state->period, 2);
++		state->polarity = PWM_POLARITY_NORMAL;
++		state->enabled = true;
++		return;
++	}
++
+ 	if ((PWM_REG_PRESCAL(val, pwm->hwpwm) == PWM_PRESCAL_MASK) &&
+ 	    sun4i_pwm->data->has_prescaler_bypass)
+ 		prescaler = 1;
+@@ -149,13 +168,24 @@ static void sun4i_pwm_get_state(struct pwm_chip *chip,
+ 
+ static int sun4i_pwm_calculate(struct sun4i_pwm_chip *sun4i_pwm,
+ 			       const struct pwm_state *state,
+-			       u32 *dty, u32 *prd, unsigned int *prsclr)
++			       u32 *dty, u32 *prd, unsigned int *prsclr,
++			       bool *bypass)
+ {
+ 	u64 clk_rate, div = 0;
+ 	unsigned int pval, prescaler = 0;
+ 
+ 	clk_rate = clk_get_rate(sun4i_pwm->clk);
+ 
++	*bypass = sun4i_pwm->data->has_direct_mod_clk_output &&
++		  state->enabled &&
++		  (state->period * clk_rate >= NSEC_PER_SEC) &&
++		  (state->period * clk_rate < 2 * NSEC_PER_SEC) &&
++		  (state->duty_cycle * clk_rate * 2 >= NSEC_PER_SEC);
++
++	/* Skip calculation of other parameters if we bypass them */
++	if (*bypass)
++		return 0;
++
+ 	if (sun4i_pwm->data->has_prescaler_bypass) {
+ 		/* First, test without any prescaler when available */
+ 		prescaler = PWM_PRESCAL_MASK;
+@@ -206,6 +236,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ 	int ret;
+ 	unsigned int delay_us, prescaler;
+ 	unsigned long now;
++	bool bypass;
+ 
+ 	pwm_get_state(pwm, &cstate);
+ 
+@@ -220,7 +251,8 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ 	spin_lock(&sun4i_pwm->ctrl_lock);
+ 	ctrl = sun4i_pwm_readl(sun4i_pwm, PWM_CTRL_REG);
+ 
+-	ret = sun4i_pwm_calculate(sun4i_pwm, state, &duty, &period, &prescaler);
++	ret = sun4i_pwm_calculate(sun4i_pwm, state, &duty, &period, &prescaler,
++				  &bypass);
+ 	if (ret) {
+ 		dev_err(chip->dev, "period exceeds the maximum value\n");
+ 		spin_unlock(&sun4i_pwm->ctrl_lock);
+@@ -229,6 +261,18 @@ static int sun4i_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+ 		return ret;
+ 	}
+ 
++	if (sun4i_pwm->data->has_direct_mod_clk_output) {
++		if (bypass) {
++			ctrl |= BIT_CH(PWM_BYPASS, pwm->hwpwm);
++			/* We can skip other parameter */
++			sun4i_pwm_writel(sun4i_pwm, ctrl, PWM_CTRL_REG);
++			spin_unlock(&sun4i_pwm->ctrl_lock);
++			return 0;
++		} else {
++			ctrl &= ~BIT_CH(PWM_BYPASS, pwm->hwpwm);
++		}
++	}
++
+ 	if (PWM_REG_PRESCAL(ctrl, pwm->hwpwm) != prescaler) {
+ 		/* Prescaler changed, the clock has to be gated */
+ 		ctrl &= ~BIT_CH(PWM_CLK_GATING, pwm->hwpwm);
+
+diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
+index 07bf7be6074b..c394878c7e5d 100644
+--- a/drivers/pwm/pwm-sun4i.c
++++ b/drivers/pwm/pwm-sun4i.c
+@@ -360,6 +360,12 @@ static const struct sun4i_pwm_data sun4i_pwm_single_bypass = {
+ 	.npwm = 1,
+ };
+ 
++static const struct sun4i_pwm_data sun50i_h6_pwm_data = {
++	.has_prescaler_bypass = true,
++	.has_direct_mod_clk_output = true,
++	.npwm = 2,
++};
++
+ static const struct of_device_id sun4i_pwm_dt_ids[] = {
+ 	{
+ 		.compatible = "allwinner,sun4i-a10-pwm",
+@@ -376,6 +382,9 @@ static const struct of_device_id sun4i_pwm_dt_ids[] = {
+ 	}, {
+ 		.compatible = "allwinner,sun8i-h3-pwm",
+ 		.data = &sun4i_pwm_single_bypass,
++	}, {
++		.compatible = "allwinner,sun50i-h6-pwm",
++		.data = &sun50i_h6_pwm_data,
+ 	}, {
+ 		/* sentinel */
+ 	},