Hi Chanwoo,
On Monday, September 29, 2014 7:42 AM, Chanwoo Choi wrote,
> To: Pankaj Dubey
> Cc: linux-arm-ker...@lists.infradead.org;
linux-samsung-soc@vger.kernel.org;
> kgene....@samsung.com; tomasz.f...@gmail.com; robh...@kernel.org;
> li...@arm.linux.org.uk; naus...@samsung.com; Mike Turquette; Sylwester
> Nawrocki
> Subject: Re: [PATCH 1/2] clk: samsung: exynos3250: add uart2/3 related
clocks
>
> Hi Pankaj,
>
> On 09/27/2014 01:58 PM, Pankaj Dubey wrote:
> > Exynos3250 has four UART channels UART0,1,2 and 3. This patch adds
> > missing clock entries for UART2 and UART3.
> >
> > CC: Mike Turquette <mturque...@linaro.org>
> > CC: Sylwester Nawrocki <s.nawro...@samsung.com>
> > Signed-off-by: Pankaj Dubey <pankaj.du...@samsung.com>
> > ---
> > drivers/clk/samsung/clk-exynos3250.c | 11 +++++++++++
> > include/dt-bindings/clock/exynos3250.h | 10 +++++++++-
> > 2 files changed, 20 insertions(+), 1 deletion(-)
>
> Exynos3250 has only two UART(0,1) port. Exynos3250 don't support UART 2,3.
>
As per Exynos3250 user manual that I have with me it supports UART(0,1,2,3).
It has been mentioned
in UART Chapter as well as CMU IP details also mentioned about the clock
entries. We have tested it
also on Espresso3250 board which is based on Exynos3250 SoC.
Thanks,
Pankaj Dubey
> Thanks,
> Chanwoo Choi
>
> >
> > diff --git a/drivers/clk/samsung/clk-exynos3250.c
> > b/drivers/clk/samsung/clk-exynos3250.c
> > index dc85f8e..0722fef 100644
> > --- a/drivers/clk/samsung/clk-exynos3250.c
> > +++ b/drivers/clk/samsung/clk-exynos3250.c
> > @@ -357,6 +357,8 @@ static struct samsung_mux_clock mux_clks[]
__initdata =
> {
> > MUX(CLK_MOUT_MMC0, "mout_mmc0", group_sclk_p, SRC_FSYS, 0, 3),
> >
> > /* SRC_PERIL0 */
> > + MUX(CLK_MOUT_UART3, "mout_uart3", group_sclk_p, SRC_PERIL0,
> 12, 4),
> > + MUX(CLK_MOUT_UART2, "mout_uart2", group_sclk_p, SRC_PERIL0, 8,
> 4),
> > MUX(CLK_MOUT_UART1, "mout_uart1", group_sclk_p, SRC_PERIL0, 4,
> 4),
> > MUX(CLK_MOUT_UART0, "mout_uart0", group_sclk_p, SRC_PERIL0, 0,
> 4),
> >
> > @@ -439,6 +441,8 @@ static struct samsung_div_clock div_clks[]
__initdata = {
> > DIV(CLK_DIV_MMC0, "div_mmc0", "mout_mmc0", DIV_FSYS1, 0, 4),
> >
> > /* DIV_PERIL0 */
> > + DIV(CLK_DIV_UART3, "div_uart3", "mout_uart3", DIV_PERIL0, 12, 4),
> > + DIV(CLK_DIV_UART2, "div_uart2", "mout_uart2", DIV_PERIL0, 8, 4),
> > DIV(CLK_DIV_UART1, "div_uart1", "mout_uart1", DIV_PERIL0, 4, 4),
> > DIV(CLK_DIV_UART0, "div_uart0", "mout_uart0", DIV_PERIL0, 0, 4),
> >
> > @@ -601,6 +605,10 @@ static struct samsung_gate_clock gate_clks[]
__initdata
> = {
> > GATE_SCLK_PERIL, 7, CLK_SET_RATE_PARENT, 0),
> > GATE(CLK_SCLK_SPI0, "sclk_spi0", "div_spi0_pre",
> > GATE_SCLK_PERIL, 6, CLK_SET_RATE_PARENT, 0),
> > + GATE(CLK_SCLK_UART3, "sclk_uart3", "div_uart3",
> > + GATE_SCLK_PERIL, 3, CLK_SET_RATE_PARENT, 0),
> > + GATE(CLK_SCLK_UART2, "sclk_uart2", "div_uart2",
> > + GATE_SCLK_PERIL, 2, CLK_SET_RATE_PARENT, 0),
> > GATE(CLK_SCLK_UART1, "sclk_uart1", "div_uart1",
> > GATE_SCLK_PERIL, 1, CLK_SET_RATE_PARENT, 0),
> > GATE(CLK_SCLK_UART0, "sclk_uart0", "div_uart0", @@ -679,6 +687,7
> @@
> > static struct samsung_gate_clock gate_clks[] __initdata = {
> > GATE(CLK_USBOTG, "usbotg", "div_aclk_200", GATE_IP_FSYS, 13, 0,
> 0),
> > GATE(CLK_USBHOST, "usbhost", "div_aclk_200", GATE_IP_FSYS, 12,
> 0, 0),
> > GATE(CLK_SROMC, "sromc", "div_aclk_200", GATE_IP_FSYS, 11, 0, 0),
> > + GATE(CLK_SDMMC2, "sdmmc2", "div_aclk_200", GATE_IP_FSYS, 7, 0,
> 0),
> > GATE(CLK_SDMMC1, "sdmmc1", "div_aclk_200", GATE_IP_FSYS, 6, 0,
> 0),
> > GATE(CLK_SDMMC0, "sdmmc0", "div_aclk_200", GATE_IP_FSYS, 5, 0,
> 0),
> > GATE(CLK_PDMA1, "pdma1", "div_aclk_200", GATE_IP_FSYS, 1, 0, 0),
> @@
> > -698,6 +707,8 @@ static struct samsung_gate_clock gate_clks[] __initdata
= {
> > GATE(CLK_I2C2, "i2c2", "div_aclk_100", GATE_IP_PERIL, 8, 0, 0),
> > GATE(CLK_I2C1, "i2c1", "div_aclk_100", GATE_IP_PERIL, 7, 0, 0),
> > GATE(CLK_I2C0, "i2c0", "div_aclk_100", GATE_IP_PERIL, 6, 0, 0),
> > + GATE(CLK_UART3, "uart3", "div_aclk_100", GATE_IP_PERIL, 3, 0, 0),
> > + GATE(CLK_UART2, "uart2", "div_aclk_100", GATE_IP_PERIL, 2, 0, 0),
> > GATE(CLK_UART1, "uart1", "div_aclk_100", GATE_IP_PERIL, 1, 0, 0),
> > GATE(CLK_UART0, "uart0", "div_aclk_100", GATE_IP_PERIL, 0, 0, 0),
> > }; diff --git a/include/dt-bindings/clock/exynos3250.h
> > b/include/dt-bindings/clock/exynos3250.h
> > index b535e9d..ffeb695 100644
> > --- a/include/dt-bindings/clock/exynos3250.h
> > +++ b/include/dt-bindings/clock/exynos3250.h
> > @@ -78,6 +78,8 @@
> > #define CLK_MOUT_CORE 58
> > #define CLK_MOUT_APLL 59
> > #define CLK_MOUT_ACLK_266_SUB 60
> > +#define CLK_MOUT_UART2 61
> > +#define CLK_MOUT_UART3 62
> >
> > /* Dividers */
> > #define CLK_DIV_GPL 64
> > @@ -126,6 +128,8 @@
> > #define CLK_DIV_CORE 107
> > #define CLK_DIV_HPM 108
> > #define CLK_DIV_COPY 109
> > +#define CLK_DIV_UART2 110
> > +#define CLK_DIV_UART3 111
> >
> > /* Gates */
> > #define CLK_ASYNC_G3D 128
> > @@ -222,6 +226,8 @@
> > #define CLK_BLOCK_MFC 219
> > #define CLK_BLOCK_CAM 220
> > #define CLK_SMIES 221
> > +#define CLK_UART2 222
> > +#define CLK_UART3 223
> >
> > /* Special clocks */
> > #define CLK_SCLK_JPEG 224
> > @@ -248,11 +254,13 @@
> > #define CLK_SCLK_SPI0 245
> > #define CLK_SCLK_UART1 246
> > #define CLK_SCLK_UART0 247
> > +#define CLK_SCLK_UART2 248
> > +#define CLK_SCLK_UART3 249
> >
> > /*
> > * Total number of clocks of main CMU.
> > * NOTE: Must be equal to last clock ID increased by one.
> > */
> > -#define CLK_NR_CLKS 248
> > +#define CLK_NR_CLKS 250
> >
> > #endif /* _DT_BINDINGS_CLOCK_SAMSUNG_EXYNOS3250_CLOCK_H
> */
> >
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