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Commit a00b0042 authored by Paul Cercueil's avatar Paul Cercueil Committed by Greg Kroah-Hartman
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memory: jz4780_nemc: Add support for the JZ4740 



Add support for the JZ4740 SoC from Ingenic.

Signed-off-by: default avatarPaul Cercueil <paul@crapouillou.net>
Reviewed-by: default avatarBoris Brezillon <bbrezillon@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1a927ad6

drivers/memory/jz4780-nemc.c

+21 −3
Original line number Diff line number Diff line
@@ -44,9 +44,14 @@ 
#define NEMC_NFCSR_NFCEn(n)	BIT((((n) - 1) << 1) + 1)

#define NEMC_NFCSR_TNFEn(n)	BIT(16 + (n) - 1)



struct jz_soc_info {

	u8 tas_tah_cycles_max;

};



struct jz4780_nemc {

	spinlock_t lock;

	struct device *dev;

	const struct jz_soc_info *soc_info;

	void __iomem *base;

	struct clk *clk;

	uint32_t clk_period;
@@ -202,7 +207,7 @@ static bool jz4780_nemc_configure_bank(struct jz4780_nemc *nemc, 
	if (of_property_read_u32(node, "ingenic,nemc-tAS", &val) == 0) {

		smcr &= ~NEMC_SMCR_TAS_MASK;

		cycles = jz4780_nemc_ns_to_cycles(nemc, val);

		if (cycles > 15) {

		if (cycles > nemc->soc_info->tas_tah_cycles_max) {

			dev_err(nemc->dev, "tAS %u is too high (%u cycles)\n",

				val, cycles);

			return false;
@@ -214,7 +219,7 @@ static bool jz4780_nemc_configure_bank(struct jz4780_nemc *nemc, 
	if (of_property_read_u32(node, "ingenic,nemc-tAH", &val) == 0) {

		smcr &= ~NEMC_SMCR_TAH_MASK;

		cycles = jz4780_nemc_ns_to_cycles(nemc, val);

		if (cycles > 15) {

		if (cycles > nemc->soc_info->tas_tah_cycles_max) {

			dev_err(nemc->dev, "tAH %u is too high (%u cycles)\n",

				val, cycles);

			return false;
@@ -278,6 +283,10 @@ static int jz4780_nemc_probe(struct platform_device *pdev) 
	if (!nemc)

		return -ENOMEM;



	nemc->soc_info = device_get_match_data(dev);

	if (!nemc->soc_info)

		return -EINVAL;



	spin_lock_init(&nemc->lock);

	nemc->dev = dev;
@@ -370,8 +379,17 @@ static int jz4780_nemc_remove(struct platform_device *pdev) 
	return 0;

}



static const struct jz_soc_info jz4740_soc_info = {

	.tas_tah_cycles_max = 7,

};



static const struct jz_soc_info jz4780_soc_info = {

	.tas_tah_cycles_max = 15,

};



static const struct of_device_id jz4780_nemc_dt_match[] = {

	{ .compatible = "ingenic,jz4780-nemc" },

	{ .compatible = "ingenic,jz4740-nemc", .data = &jz4740_soc_info, },

	{ .compatible = "ingenic,jz4780-nemc", .data = &jz4780_soc_info, },

	{},

};