Hi Linus,
Just one fix for our serial driver to get it working with MSM7x30,
which was added this merge window.
Daniel
The following changes since commit be1066bbcd443a65df312fdecea7e4959adedb45:
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 (2010-04-30 10:16:55 -0700)
are available in the git repository at:
git://codeaurora.org/quic/kernel/dwalker/linux-msm.git msm-serial
Abhijeet Dharmapurikar (1):
msm: serial: fix serial on MSM7x30
drivers/serial/msm_serial.c | 21 ++-------------
drivers/serial/msm_serial.h | 56 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 59 insertions(+), 18 deletions(-)
diff --git a/drivers/serial/msm_serial.c b/drivers/serial/msm_serial.c
index ecdc0fa..f8c816e 100644
--- a/drivers/serial/msm_serial.c
+++ b/drivers/serial/msm_serial.c
@@ -41,19 +41,6 @@ struct msm_port {
unsigned int imr;
};
-#define UART_TO_MSM(uart_port) ((struct msm_port *) uart_port)
-
-static inline void msm_write(struct uart_port *port, unsigned int val,
- unsigned int off)
-{
- __raw_writel(val, port->membase + off);
-}
-
-static inline unsigned int msm_read(struct uart_port *port, unsigned int off)
-{
- return __raw_readl(port->membase + off);
-}
-
static void msm_stop_tx(struct uart_port *port)
{
struct msm_port *msm_port = UART_TO_MSM(port);
@@ -320,11 +307,7 @@ 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 +689,8 @@ 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..f6ca9ca 100644
--- a/drivers/serial/msm_serial.h
+++ b/drivers/serial/msm_serial.h
@@ -114,4 +114,60 @@
#define UART_MISR 0x0010
#define UART_ISR 0x0014
+#define UART_TO_MSM(uart_port) ((struct msm_port *) uart_port)
+
+static inline
+void msm_write(struct uart_port *port, unsigned int val, unsigned int off)
+{
+ __raw_writel(val, port->membase + off);
+}
+
+static inline
+unsigned int msm_read(struct uart_port *port, unsigned int off)
+{
+ return __raw_readl(port->membase + off);
+}
+
+/*
+ * Setup the MND registers to use the TCXO clock.
+ */
+static inline 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);
+}
+
+/*
+ * Setup the MND registers to use the TCXO clock divided by 4.
+ */
+static inline 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 inline
+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);
+}
+
+/*
+ * TROUT has a specific defect that makes it report it's uartclk
+ * as 19.2Mhz (TCXO) when it's actually 4.8Mhz (TCXO/4). This special
+ * cases TROUT to use the right clock.
+ */
+#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 */
--
To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
