at91: add kernel support for sama7g5 soc

Add kernel support for SAMA7G5 by back-porting mainline kernel patches.
Among SAMA7G5 features could be remembered:
- ARM Cortex-A7
- double data rate multi-port dynamic RAM controller supporting DDR2,
  DDR3, DDR3L, LPDDR2, LPDDR3 up to 533MHz
- peripherals for audio, video processing
- 1 gigabit + 1 megabit Ethernet controllers
- 6 CAN controllers
- trust zone support
- DVFS for CPU
- criptography IPs

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch b/target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch
new file mode 100644
index 0000000000..b4f1635e68
--- /dev/null
+++ b/target/linux/at91/patches-5.10/152-ASoC-mchp-i2s-mcc-Add-support-to-select-TDM-pins.patch
@@ -0,0 +1,113 @@
+From 2bbdc5b38603384996271a8817b0578a2360af2f Mon Sep 17 00:00:00 2001
+From: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+Date: Mon, 1 Mar 2021 19:09:03 +0200
+Subject: [PATCH 152/247] ASoC: mchp-i2s-mcc: Add support to select TDM pins
+
+SAMA7G5's I2S-MCC has 4 pairs of DIN/DOUT pins. Since TDM only uses a
+single pair of pins for synchronous capture and playback, the controller
+needs to be told which of the pair is connected. This can be mentioned
+using the "microchip,tdm-data-pair" property from DT. The property is
+optional, useful only if TDM is used. If it's missing, DIN/DOUT 0 pins
+will be used by default.
+
+Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
+Link: https://lore.kernel.org/r/20210301170905.835091-6-codrin.ciubotariu@microchip.com
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ sound/soc/atmel/mchp-i2s-mcc.c | 52 +++++++++++++++++++++++++++++++---
+ 1 file changed, 48 insertions(+), 4 deletions(-)
+
+diff --git a/sound/soc/atmel/mchp-i2s-mcc.c b/sound/soc/atmel/mchp-i2s-mcc.c
+index dca4fd1e2dfd..0818fa864f0e 100644
+--- a/sound/soc/atmel/mchp-i2s-mcc.c
++++ b/sound/soc/atmel/mchp-i2s-mcc.c
+@@ -100,6 +100,8 @@
+ #define MCHP_I2SMCC_MRA_DATALENGTH_8_BITS_COMPACT	(7 << 1)
+ 
+ #define MCHP_I2SMCC_MRA_WIRECFG_MASK		GENMASK(5, 4)
++#define MCHP_I2SMCC_MRA_WIRECFG_TDM(pin)	(((pin) << 4) & \
++						 MCHP_I2SMCC_MRA_WIRECFG_MASK)
+ #define MCHP_I2SMCC_MRA_WIRECFG_I2S_1_TDM_0	(0 << 4)
+ #define MCHP_I2SMCC_MRA_WIRECFG_I2S_2_TDM_1	(1 << 4)
+ #define MCHP_I2SMCC_MRA_WIRECFG_I2S_4_TDM_2	(2 << 4)
+@@ -245,6 +247,7 @@ struct mchp_i2s_mcc_dev {
+ 	unsigned int				frame_length;
+ 	int					tdm_slots;
+ 	int					channels;
++	u8					tdm_data_pair;
+ 	unsigned int				gclk_use:1;
+ 	unsigned int				gclk_running:1;
+ 	unsigned int				tx_rdy:1;
+@@ -589,6 +592,8 @@ static int mchp_i2s_mcc_hw_params(struct snd_pcm_substream *substream,
+ 		if (!frame_length)
+ 			frame_length = 2 * params_physical_width(params);
+ 	} else if (dev->fmt & SND_SOC_DAIFMT_DSP_A) {
++		mra |= MCHP_I2SMCC_MRA_WIRECFG_TDM(dev->tdm_data_pair);
++
+ 		if (dev->tdm_slots) {
+ 			if (channels % 2 && channels * 2 <= dev->tdm_slots) {
+ 				/*
+@@ -914,6 +919,45 @@ static const struct of_device_id mchp_i2s_mcc_dt_ids[] = {
+ MODULE_DEVICE_TABLE(of, mchp_i2s_mcc_dt_ids);
+ #endif
+ 
++static int mchp_i2s_mcc_soc_data_parse(struct platform_device *pdev,
++				       struct mchp_i2s_mcc_dev *dev)
++{
++	int err;
++
++	if (!dev->soc) {
++		dev_err(&pdev->dev, "failed to get soc data\n");
++		return -ENODEV;
++	}
++
++	if (dev->soc->data_pin_pair_num == 1)
++		return 0;
++
++	err = of_property_read_u8(pdev->dev.of_node, "microchip,tdm-data-pair",
++				  &dev->tdm_data_pair);
++	if (err < 0 && err != -EINVAL) {
++		dev_err(&pdev->dev,
++			"bad property data for 'microchip,tdm-data-pair': %d",
++			err);
++		return err;
++	}
++	if (err == -EINVAL) {
++		dev_info(&pdev->dev,
++			 "'microchip,tdm-data-pair' not found; assuming DIN/DOUT 0 for TDM\n");
++		dev->tdm_data_pair = 0;
++	} else {
++		if (dev->tdm_data_pair > dev->soc->data_pin_pair_num - 1) {
++			dev_err(&pdev->dev,
++				"invalid value for 'microchip,tdm-data-pair': %d\n",
++				dev->tdm_data_pair);
++			return -EINVAL;
++		}
++		dev_dbg(&pdev->dev, "TMD format on DIN/DOUT %d pins\n",
++			dev->tdm_data_pair);
++	}
++
++	return 0;
++}
++
+ static int mchp_i2s_mcc_probe(struct platform_device *pdev)
+ {
+ 	struct mchp_i2s_mcc_dev *dev;
+@@ -966,10 +1010,10 @@ static int mchp_i2s_mcc_probe(struct platform_device *pdev)
+ 	}
+ 
+ 	dev->soc = of_device_get_match_data(&pdev->dev);
+-	if (!dev->soc) {
+-		dev_err(&pdev->dev, "failed to get soc data\n");
+-		return -ENODEV;
+-	}
++	err = mchp_i2s_mcc_soc_data_parse(pdev, dev);
++	if (err < 0)
++		return err;
++
+ 	dev->dev = &pdev->dev;
+ 	dev->regmap = regmap;
+ 	platform_set_drvdata(pdev, dev);
+-- 
+2.32.0
+