diff options
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/glamo/glamo-core.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/drivers/mfd/glamo/glamo-core.c b/drivers/mfd/glamo/glamo-core.c index b4595a8202d..e6253deeebd 100644 --- a/drivers/mfd/glamo/glamo-core.c +++ b/drivers/mfd/glamo/glamo-core.c @@ -58,6 +58,25 @@ #define GLAMO_MEM_REFRESH_COUNT 0x100 + +/* + * Glamo internal settings + * + * We run the memory interface from the faster PLLB on 2.6.28 kernels and + * above. Couple of GTA02 users report trouble with memory bus when they + * upgraded from 2.6.24. So this parameter allows reversion to 2.6.24 + * scheme if their Glamo chip needs it. + * + * you can override the faster default on kernel commandline using + * + * glamo3362.slow_memory=1 + * + * for example + */ + +static int slow_memory = 0; +module_param(slow_memory, int, 0644); + struct reg_range { int start; int count; @@ -786,6 +805,19 @@ int glamo_run_script(struct glamo_core *glamo, struct glamo_script *script, while ((__reg_read(glamo, GLAMO_REG_PLL_GEN5) & 3) != 3) ; break; + + /* + * couple of people reported artefacts with 2.6.28 changes, this + * allows reversion to 2.6.24 settings + */ + + case 0x200: + if (slow_memory) + __reg_write(glamo, script[i].reg, 0xef0); + else + __reg_write(glamo, script[i].reg, 0xe03); + break; + default: __reg_write(glamo, script[i].reg, script[i].val); break; @@ -848,7 +880,7 @@ static struct glamo_script glamo_init_script[] = { * b7..b4 = 0 = no wait states on read or write * b0 = 1 select PLL2 for Host interface, b1 = enable it */ - { 0x200, 0x0e03 }, + { 0x200, 0x0e03 /* this is replaced by script parser */ }, { 0x202, 0x07ff }, { 0x212, 0x0000 }, { 0x214, 0x4000 }, |