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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2012-05-01 18:18:16 +0200
committerChris Ball <cjb@laptop.org>2012-07-21 00:02:21 -0400
commitbf68a812f06ca40bccfa2e792055141f2c3948c7 (patch)
treebecf790d34b3d971bae3285f9eeff44ac8444430 /drivers/mmc/host
parentc7bb4487a3474c03986758595fcae1cfb771b3b0 (diff)
downloadlinux-linaro-stable-bf68a812f06ca40bccfa2e792055141f2c3948c7.tar.gz
mmc: sh-mmcif: add OF support, make platform data optional
Add primitive OF support to the sh-mmcif driver, which also makes it necessary to be able to run without platform data. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/sh_mmcif.c29
1 files changed, 20 insertions, 9 deletions
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 204bcedc2164..68b31f7c290b 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -54,6 +54,7 @@
#include <linux/mmc/mmc.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sh_mmcif.h>
+#include <linux/mod_devicetable.h>
#include <linux/pagemap.h>
#include <linux/platform_device.h>
#include <linux/pm_qos.h>
@@ -384,6 +385,9 @@ static void sh_mmcif_request_dma(struct sh_mmcif_host *host,
struct sh_dmae_slave *tx, *rx;
host->dma_active = false;
+ if (!pdata)
+ return;
+
/* We can only either use DMA for both Tx and Rx or not use it at all */
if (pdata->dma) {
dev_warn(&host->pd->dev,
@@ -444,13 +448,14 @@ static void sh_mmcif_release_dma(struct sh_mmcif_host *host)
static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
{
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
+ bool sup_pclk = p ? p->sup_pclk : false;
sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR);
if (!clk)
return;
- if (p->sup_pclk && clk == host->clk)
+ if (sup_pclk && clk == host->clk)
sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
else
sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
@@ -928,7 +933,7 @@ static void sh_mmcif_set_power(struct sh_mmcif_host *host, struct mmc_ios *ios)
struct sh_mmcif_plat_data *pd = host->pd->dev.platform_data;
struct mmc_host *mmc = host->mmc;
- if (pd->set_pwr)
+ if (pd && pd->set_pwr)
pd->set_pwr(host->pd, ios->power_mode != MMC_POWER_OFF);
if (!IS_ERR(mmc->supply.vmmc))
/* Errors ignored... */
@@ -996,7 +1001,7 @@ static int sh_mmcif_get_cd(struct mmc_host *mmc)
struct sh_mmcif_host *host = mmc_priv(mmc);
struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
- if (!p->get_cd)
+ if (!p || !p->get_cd)
return -ENOSYS;
else
return p->get_cd(host->pd);
@@ -1269,6 +1274,9 @@ static void sh_mmcif_init_ocr(struct sh_mmcif_host *host)
mmc_regulator_get_supply(mmc);
+ if (!pd)
+ return;
+
if (!mmc->ocr_avail)
mmc->ocr_avail = pd->ocr;
else if (pd->ocr)
@@ -1285,11 +1293,6 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
void __iomem *reg;
char clk_name[8];
- if (!pd) {
- dev_err(&pdev->dev, "sh_mmcif plat data error.\n");
- return -ENXIO;
- }
-
irq[0] = platform_get_irq(pdev, 0);
irq[1] = platform_get_irq(pdev, 1);
if (irq[0] < 0 || irq[1] < 0) {
@@ -1325,7 +1328,7 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
sh_mmcif_init_ocr(host);
mmc->caps = MMC_CAP_MMC_HIGHSPEED;
- if (pd->caps)
+ if (pd && pd->caps)
mmc->caps |= pd->caps;
mmc->max_segs = 32;
mmc->max_blk_size = 512;
@@ -1462,6 +1465,12 @@ static int sh_mmcif_resume(struct device *dev)
#define sh_mmcif_resume NULL
#endif /* CONFIG_PM */
+static const struct of_device_id mmcif_of_match[] = {
+ { .compatible = "renesas,sh-mmcif" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, mmcif_of_match);
+
static const struct dev_pm_ops sh_mmcif_dev_pm_ops = {
.suspend = sh_mmcif_suspend,
.resume = sh_mmcif_resume,
@@ -1473,6 +1482,8 @@ static struct platform_driver sh_mmcif_driver = {
.driver = {
.name = DRIVER_NAME,
.pm = &sh_mmcif_dev_pm_ops,
+ .owner = THIS_MODULE,
+ .of_match_table = mmcif_of_match,
},
};