Merge branch 'for-v3.19/gpmc-omap' of github.com:rogerq/linux into omap-for-v3.19/gpmc

Conflicts:
	arch/arm/mach-omap2/gpmc.c
This commit is contained in:
Tony Lindgren 2014-11-03 17:45:36 -08:00
commit 2dde3bccbf
1 changed files with 54 additions and 33 deletions

View File

@ -85,6 +85,8 @@
#define GPMC_ECC_CTRL_ECCREG8 0x008
#define GPMC_ECC_CTRL_ECCREG9 0x009
#define GPMC_CONFIG_LIMITEDADDRESS BIT(1)
#define GPMC_CONFIG2_CSEXTRADELAY BIT(7)
#define GPMC_CONFIG3_ADVEXTRADELAY BIT(7)
#define GPMC_CONFIG4_OEEXTRADELAY BIT(7)
@ -210,11 +212,6 @@ static unsigned long gpmc_get_fclk_period(void)
{
unsigned long rate = clk_get_rate(gpmc_l3_clk);
if (rate == 0) {
printk(KERN_WARNING "gpmc_l3_clk not enabled\n");
return 0;
}
rate /= 1000;
rate = 1000000000 / rate; /* In picoseconds */
@ -414,13 +411,8 @@ static inline void gpmc_cs_show_timings(int cs, const char *desc)
}
#endif
#ifdef DEBUG
static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
int time, const char *name)
#else
static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
int time)
#endif
{
u32 l;
int ticks, mask, nr_bits;
@ -430,15 +422,15 @@ static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
else
ticks = gpmc_ns_to_ticks(time);
nr_bits = end_bit - st_bit + 1;
if (ticks >= 1 << nr_bits) {
#ifdef DEBUG
printk(KERN_INFO "GPMC CS%d: %-10s* %3d ns, %3d ticks >= %d\n",
cs, name, time, ticks, 1 << nr_bits);
#endif
mask = (1 << nr_bits) - 1;
if (ticks > mask) {
pr_err("%s: GPMC error! CS%d: %s: %d ns, %d ticks > %d\n",
__func__, cs, name, time, ticks, mask);
return -1;
}
mask = (1 << nr_bits) - 1;
l = gpmc_cs_read_reg(cs, reg);
#ifdef DEBUG
printk(KERN_INFO
@ -453,16 +445,10 @@ static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit,
return 0;
}
#ifdef DEBUG
#define GPMC_SET_ONE(reg, st, end, field) \
if (set_gpmc_timing_reg(cs, (reg), (st), (end), \
t->field, #field) < 0) \
return -1
#else
#define GPMC_SET_ONE(reg, st, end, field) \
if (set_gpmc_timing_reg(cs, (reg), (st), (end), t->field) < 0) \
return -1
#endif
int gpmc_calc_divider(unsigned int sync_clk)
{
@ -539,7 +525,7 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t)
return 0;
}
static int gpmc_cs_enable_mem(int cs, u32 base, u32 size)
static int gpmc_cs_set_memconf(int cs, u32 base, u32 size)
{
u32 l;
u32 mask;
@ -563,6 +549,15 @@ static int gpmc_cs_enable_mem(int cs, u32 base, u32 size)
return 0;
}
static void gpmc_cs_enable_mem(int cs)
{
u32 l;
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
l |= GPMC_CONFIG7_CSVALID;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
}
static void gpmc_cs_disable_mem(int cs)
{
u32 l;
@ -693,18 +688,18 @@ static int gpmc_cs_remap(int cs, u32 base)
gpmc_cs_get_memconf(cs, &old_base, &size);
if (base == old_base)
return 0;
gpmc_cs_disable_mem(cs);
ret = gpmc_cs_delete_mem(cs);
if (ret < 0)
return ret;
ret = gpmc_cs_insert_mem(cs, base, size);
if (ret < 0)
return ret;
ret = gpmc_cs_enable_mem(cs, base, size);
if (ret < 0)
return ret;
return 0;
ret = gpmc_cs_set_memconf(cs, base, size);
return ret;
}
int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
@ -734,12 +729,17 @@ int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
if (r < 0)
goto out;
r = gpmc_cs_enable_mem(cs, res->start, resource_size(res));
/* Disable CS while changing base address and size mask */
gpmc_cs_disable_mem(cs);
r = gpmc_cs_set_memconf(cs, res->start, resource_size(res));
if (r < 0) {
release_resource(res);
goto out;
}
/* Enable CS */
gpmc_cs_enable_mem(cs);
*base = res->start;
gpmc_cs_set_reserved(cs, 1);
out:
@ -1667,6 +1667,7 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
unsigned long base;
const char *name;
int ret, cs;
u32 val;
if (of_property_read_u32(child, "reg", &cs) < 0) {
dev_err(&pdev->dev, "%s has no 'reg' property\n",
@ -1712,6 +1713,9 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
goto no_timings;
}
/* CS must be disabled while making changes to gpmc configuration */
gpmc_cs_disable_mem(cs);
/*
* FIXME: gpmc_cs_request() will map the CS to an arbitary
* location in the gpmc address space. When booting with
@ -1735,7 +1739,20 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
if (ret < 0)
goto err;
gpmc_cs_set_timings(cs, &gpmc_t);
ret = gpmc_cs_set_timings(cs, &gpmc_t);
if (ret) {
dev_err(&pdev->dev, "failed to set gpmc timings for: %s\n",
child->name);
goto err;
}
/* Clear limited address i.e. enable A26-A11 */
val = gpmc_read_reg(GPMC_CONFIG);
val &= ~GPMC_CONFIG_LIMITEDADDRESS;
gpmc_write_reg(GPMC_CONFIG, val);
/* Enable CS region */
gpmc_cs_enable_mem(cs);
no_timings:
if (of_platform_device_create(child, NULL, &pdev->dev))
@ -1832,13 +1849,18 @@ static int gpmc_probe(struct platform_device *pdev)
else
gpmc_irq = res->start;
gpmc_l3_clk = clk_get(&pdev->dev, "fck");
gpmc_l3_clk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(gpmc_l3_clk)) {
dev_err(&pdev->dev, "error: clk_get\n");
dev_err(&pdev->dev, "Failed to get GPMC fck\n");
gpmc_irq = 0;
return PTR_ERR(gpmc_l3_clk);
}
if (!clk_get_rate(gpmc_l3_clk)) {
dev_err(&pdev->dev, "Invalid GPMC fck clock rate\n");
return -EINVAL;
}
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
@ -1878,7 +1900,6 @@ static int gpmc_probe(struct platform_device *pdev)
rc = gpmc_probe_dt(pdev);
if (rc < 0) {
pm_runtime_put_sync(&pdev->dev);
clk_put(gpmc_l3_clk);
dev_err(gpmc_dev, "failed to probe DT parameters\n");
return rc;
}