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authorGerhard Sittig <gsi@denx.de>2013-11-30 23:51:29 +0100
committerAnatolij Gustschin <agust@denx.de>2014-01-12 18:53:04 +0100
commite149b42b8605f4e0e86662fe880716ccdfdb4ef9 (patch)
treee0aa3e6109380fa73c8cd0e59628e82061615ce5 /drivers/tty
parentdff148ad7b69409181e12641cca6962e5f02cffe (diff)
serial: mpc512x: adjust for OF based clock lookup
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Gerhard Sittig <gsi@denx.de> Signed-off-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/mpc52xx_uart.c40
1 files changed, 35 insertions, 5 deletions
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c
index ec06505e3ae..6345f377a24 100644
--- a/drivers/tty/serial/mpc52xx_uart.c
+++ b/drivers/tty/serial/mpc52xx_uart.c
@@ -619,29 +619,55 @@ static irqreturn_t mpc512x_psc_handle_irq(struct uart_port *port)
}
static struct clk *psc_mclk_clk[MPC52xx_PSC_MAXNUM];
+static struct clk *psc_ipg_clk[MPC52xx_PSC_MAXNUM];
/* called from within the .request_port() callback (allocation) */
static int mpc512x_psc_alloc_clock(struct uart_port *port)
{
int psc_num;
- char clk_name[16];
struct clk *clk;
int err;
psc_num = (port->mapbase & 0xf00) >> 8;
- snprintf(clk_name, sizeof(clk_name), "psc%d_mclk", psc_num);
- clk = devm_clk_get(port->dev, clk_name);
+
+ clk = devm_clk_get(port->dev, "mclk");
if (IS_ERR(clk)) {
dev_err(port->dev, "Failed to get MCLK!\n");
- return PTR_ERR(clk);
+ err = PTR_ERR(clk);
+ goto out_err;
}
err = clk_prepare_enable(clk);
if (err) {
dev_err(port->dev, "Failed to enable MCLK!\n");
- return err;
+ goto out_err;
}
psc_mclk_clk[psc_num] = clk;
+
+ clk = devm_clk_get(port->dev, "ipg");
+ if (IS_ERR(clk)) {
+ dev_err(port->dev, "Failed to get IPG clock!\n");
+ err = PTR_ERR(clk);
+ goto out_err;
+ }
+ err = clk_prepare_enable(clk);
+ if (err) {
+ dev_err(port->dev, "Failed to enable IPG clock!\n");
+ goto out_err;
+ }
+ psc_ipg_clk[psc_num] = clk;
+
return 0;
+
+out_err:
+ if (psc_mclk_clk[psc_num]) {
+ clk_disable_unprepare(psc_mclk_clk[psc_num]);
+ psc_mclk_clk[psc_num] = NULL;
+ }
+ if (psc_ipg_clk[psc_num]) {
+ clk_disable_unprepare(psc_ipg_clk[psc_num]);
+ psc_ipg_clk[psc_num] = NULL;
+ }
+ return err;
}
/* called from within the .release_port() callback (release) */
@@ -656,6 +682,10 @@ static void mpc512x_psc_relse_clock(struct uart_port *port)
clk_disable_unprepare(clk);
psc_mclk_clk[psc_num] = NULL;
}
+ if (psc_ipg_clk[psc_num]) {
+ clk_disable_unprepare(psc_ipg_clk[psc_num]);
+ psc_ipg_clk[psc_num] = NULL;
+ }
}
/* implementation of the .clock() callback (enable/disable) */