All targets report the correct uartclk except trout.
For trout force mnd counter values as if uartclk was
fed by tcxo/4. For other targets set the mnd counter
based on uartclk.
Signed-off-by: Abhijeet Dharmapurikar <adharmap@xxxxxxxxxxxxxx>
---
drivers/serial/msm_serial.c | 33 ++++++++++++++++++++++++++++-----
drivers/serial/msm_serial.h | 6 ++++++
2 files changed, 34 insertions(+), 5 deletions(-)
diff --git a/drivers/serial/msm_serial.c b/drivers/serial/msm_serial.c
index ecdc0fa..7021c8c 100644
--- a/drivers/serial/msm_serial.c
+++ b/drivers/serial/msm_serial.c
@@ -315,16 +315,37 @@ static void msm_reset(struct uart_port *port)
msm_write(port, UART_CR_CMD_SET_RFR, UART_CR);
}
+
+static void msm_serial_set_mnd_regs_tcxo(struct uart_port *port)
+{
+ msm_write(port, 0x06, UART_MREG);
+ msm_write(port, 0xF1, UART_NREG);
+ msm_write(port, 0x0F, UART_DREG);
+ msm_write(port, 0x1A, UART_MNDREG);
+}
+
+static void msm_serial_set_mnd_regs_tcxoby4(struct uart_port *port)
+{
+ msm_write(port, 0x18, UART_MREG);
+ msm_write(port, 0xF6, UART_NREG);
+ msm_write(port, 0x0F, UART_DREG);
+ msm_write(port, 0x0A, UART_MNDREG);
+}
+
+static void msm_serial_set_mnd_regs_from_uartclk(struct uart_port *port)
+{
+ if (port->uartclk == 19200000)
+ msm_serial_set_mnd_regs_tcxo(port);
+ else
+ msm_serial_set_mnd_regs_tcxoby4(port);
+}
+
static void msm_init_clock(struct uart_port *port)
{
struct msm_port *msm_port = UART_TO_MSM(port);
clk_enable(msm_port->clk);
-
- msm_write(port, 0xC0, UART_MREG);
- msm_write(port, 0xB2, UART_NREG);
- msm_write(port, 0x7D, UART_DREG);
- msm_write(port, 0x1C, UART_MNDREG);
+ msm_serial_set_mnd_regs(port);
}
static int msm_startup(struct uart_port *port)
@@ -706,6 +727,8 @@ static int __init msm_serial_probe(struct platform_device *pdev)
if (unlikely(IS_ERR(msm_port->clk)))
return PTR_ERR(msm_port->clk);
port->uartclk = clk_get_rate(msm_port->clk);
+ printk(KERN_INFO "uartclk = %d\n", port->uartclk);
+
resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (unlikely(!resource))
diff --git a/drivers/serial/msm_serial.h b/drivers/serial/msm_serial.h
index 689f1fa..4767211 100644
--- a/drivers/serial/msm_serial.h
+++ b/drivers/serial/msm_serial.h
@@ -114,4 +114,10 @@
#define UART_MISR 0x0010
#define UART_ISR 0x0014
+#ifdef CONFIG_MACH_TROUT
+#define msm_serial_set_mnd_regs msm_serial_set_mnd_regs_tcxoby4
+#else
+#define msm_serial_set_mnd_regs msm_serial_set_mnd_regs_from_uartclk
+#endif
+
#endif /* __DRIVERS_SERIAL_MSM_SERIAL_H */
--
1.5.6.3
--
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