diff options
| -rw-r--r-- | drivers/memory/omap-gpmc.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c index 4dd1c65..784a64f 100644 --- a/drivers/memory/omap-gpmc.c +++ b/drivers/memory/omap-gpmc.c @@ -1911,6 +1911,8 @@ static int gpmc_probe_generic_child(struct platform_device *pdev, const char *name; int ret, cs; u32 val; + struct gpio_desc *waitpin_desc = NULL; + struct gpmc_device *gpmc = platform_get_drvdata(pdev); if (of_property_read_u32(child, "reg", &cs) < 0) { dev_err(&pdev->dev, "%s has no 'reg' property\n", @@ -2020,16 +2022,30 @@ static int gpmc_probe_generic_child(struct platform_device *pdev, goto err; } + /* Reserve wait pin if it is required and valid */ + if (gpmc_s.wait_on_read || gpmc_s.wait_on_write) { + unsigned int wait_pin = gpmc_s.wait_pin; + + waitpin_desc = gpiochip_request_own_desc(&gpmc->gpio_chip, + wait_pin, "WAITPIN"); + if (IS_ERR(waitpin_desc)) { + dev_err(&pdev->dev, "invalid wait-pin: %d\n", wait_pin); + ret = PTR_ERR(waitpin_desc); + goto err; + } + } + gpmc_cs_show_timings(cs, "before gpmc_cs_program_settings"); + ret = gpmc_cs_program_settings(cs, &gpmc_s); if (ret < 0) - goto err; + goto err_cs; ret = gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); if (ret) { dev_err(&pdev->dev, "failed to set gpmc timings for: %s\n", child->name); - goto err; + goto err_cs; } /* Clear limited address i.e. enable A26-A11 */ @@ -2060,6 +2076,10 @@ err_child_fail: dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name); ret = -ENODEV; +err_cs: + if (waitpin_desc) + gpiochip_free_own_desc(waitpin_desc); + err: gpmc_cs_free(cs); |