Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-17 17:41:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

spi: mpc512x: adjust to OF based clock lookup

Browse Source 
after device tree based clock lookup became available, the peripheral
driver need no longer construct clock names which include the PSC index,
remove the "psc%d_mclk" template and unconditionally use 'mclk'

acquire and release the 'ipg' clock item for register access as well

Cc: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org
Signed-off-by: Gerhard Sittig <gsi@denx.de>
Acked-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Gerhard Sittig 2013-11-30 23:51:28 +01:00 committed by Anatolij Gustschin
parent 7d71d5b2e8
commit dff148ad7b
1 changed files with 18 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/spi/spi-mpc512x-psc.c
View File

@ -40,6 +40,7 @@ struct mpc512x_psc_spi {
unsigned int irq;
u8 bits_per_word;
struct clk *clk_mclk;
struct clk *clk_ipg;
u32 mclk_rate;
struct completion txisrdone;
@ -475,8 +476,6 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
struct spi_master *master;
int ret;
void *tempp;
int psc_num;
char clk_name[16];
struct clk *clk;
master = spi_alloc_master(dev, sizeof *mps);
@ -520,9 +519,7 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
goto free_master;
init_completion(&mps->txisrdone);
psc_num = master->bus_num;
snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num);
clk = devm_clk_get(dev, clk_name);
clk = devm_clk_get(dev, "mclk");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto free_irq;
@ -533,17 +530,29 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
mps->clk_mclk = clk;
mps->mclk_rate = clk_get_rate(clk);
clk = devm_clk_get(dev, "ipg");
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto free_mclk_clock;
}
ret = clk_prepare_enable(clk);
if (ret)
goto free_mclk_clock;
mps->clk_ipg = clk;
ret = mpc512x_psc_spi_port_config(master, mps);
if (ret < 0)
goto free_clock;
goto free_ipg_clock;
ret = devm_spi_register_master(dev, master);
if (ret < 0)
goto free_clock;
goto free_ipg_clock;
return ret;
free_clock:
free_ipg_clock:
clk_disable_unprepare(mps->clk_ipg);
free_mclk_clock:
clk_disable_unprepare(mps->clk_mclk);
free_irq:
free_irq(mps->irq, mps);
@ -561,6 +570,7 @@ static int mpc512x_psc_spi_do_remove(struct device *dev)
struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
clk_disable_unprepare(mps->clk_mclk);
clk_disable_unprepare(mps->clk_ipg);
free_irq(mps->irq, mps);
if (mps->psc)
iounmap(mps->psc);