lkml.org 
[lkml]   [2019]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 RESEND 4/4] memory: jz4780_nemc: Add support for the JZ4740
Date
Add support for the JZ4740 SoC from Ingenic.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Boris Brezillon <bbrezillon@kernel.org>
---

v2: No change

v3: Support the JZ4740 instead of the JZ4725B (exact same functionality
but JZ4740 is already fully upstream)

drivers/memory/jz4780-nemc.c | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/memory/jz4780-nemc.c b/drivers/memory/jz4780-nemc.c
index 66b8b43eaeff..f3a19b9b76ac 100644
--- a/drivers/memory/jz4780-nemc.c
+++ b/drivers/memory/jz4780-nemc.c
@@ -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, },
{},
};

--
2.11.0
\
 
 \ /
  Last update: 2019-04-14 13:48    [W:0.035 / U:36.992 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site