Hi Arun, Alim,
On 02.05.2014 15:03, Arun Kumar K wrote:
From: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
Exynos5800 clock structure is mostly similar to 5420 with only
a small delta changes. So the 5420 clock file is re-used for
5800 also. The common clocks for both are seggreagated and few
clocks which are different for both are separately initialized.
Let's start with a general comment to this patch first. Have you
consulted this with Shaik and Rahul (on CC) who are currently doing a
quite heavy lifting of this driver to make sure that your work don't
cause conflicts?
Also please see some more specific comments inline.
Signed-off-by: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
Signed-off-by: Arun Kumar K <arun.kk@xxxxxxxxxxx>
---
.../devicetree/bindings/clock/exynos5420-clock.txt | 3 +-
drivers/clk/samsung/clk-exynos5420.c | 192 +++++++++++++++-----
include/dt-bindings/clock/exynos5420.h | 1 +
3 files changed, 150 insertions(+), 46 deletions(-)
diff --git a/Documentation/devicetree/bindings/clock/exynos5420-clock.txt b/Documentation/devicetree/bindings/clock/exynos5420-clock.txt
index ca88c97..d54f42c 100644
--- a/Documentation/devicetree/bindings/clock/exynos5420-clock.txt
+++ b/Documentation/devicetree/bindings/clock/exynos5420-clock.txt
@@ -1,12 +1,13 @@
* Samsung Exynos5420 Clock Controller
The Exynos5420 clock controller generates and supplies clock to various
-controllers within the Exynos5420 SoC.
+controllers within the Exynos5420 SoC and for the Exynos5800 SoC.
Required Properties:
- compatible: should be one of the following.
- "samsung,exynos5420-clock" - controller compatible with Exynos5420 SoC.
+ - "samsung,exynos5800-clock" - controller compatible with Exynos5800 SoC.
- reg: physical base address of the controller and length of memory mapped
region.
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c
index 60b2681..0543cb7 100644
--- a/drivers/clk/samsung/clk-exynos5420.c
+++ b/drivers/clk/samsung/clk-exynos5420.c
@@ -51,6 +51,7 @@
#define SRC_TOP5 0x10214
#define SRC_TOP6 0x10218
#define SRC_TOP7 0x1021c
+#define SRC_TOP9 0x10224 /* 5800 specific */
#define SRC_DISP10 0x1022c
#define SRC_MAU 0x10240
#define SRC_FSYS 0x10244
@@ -59,6 +60,7 @@
#define SRC_TOP10 0x10280
#define SRC_TOP11 0x10284
#define SRC_TOP12 0x10288
+#define SRC_TOP13 0x1028c /* 5800 specific */
#define SRC_MASK_DISP10 0x1032c
#define SRC_MASK_FSYS 0x10340
#define SRC_MASK_PERIC0 0x10350
@@ -66,6 +68,7 @@
#define DIV_TOP0 0x10500
#define DIV_TOP1 0x10504
#define DIV_TOP2 0x10508
+#define DIV_TOP9 0x10524 /* 5800 specific */
#define DIV_DISP10 0x1052c
#define DIV_MAU 0x10544
#define DIV_FSYS0 0x10548
@@ -102,8 +105,14 @@
#define SRC_KFC 0x28200
#define DIV_KFC0 0x28500
+/* Exynos5x SoC type */
+enum exynos5x_soc {
+ EXYNOS5420,
+ EXYNOS5800,
+};
+
/* list of PLLs */
-enum exynos5420_plls {
+enum exynos5x_plls {
apll, cpll, dpll, epll, rpll, ipll, spll, vpll, mpll,
bpll, kpll,
nr_plls /* number of PLLs */
@@ -112,13 +121,13 @@ enum exynos5420_plls {
static void __iomem *reg_base;
#ifdef CONFIG_PM_SLEEP
-static struct samsung_clk_reg_dump *exynos5420_save;
+static struct samsung_clk_reg_dump *exynos5x_save;
/*
* list of controller registers to be saved and restored during a
* suspend/resume cycle.
*/
-static unsigned long exynos5420_clk_regs[] __initdata = {
+static unsigned long exynos5x_clk_regs[] __initdata = {
SRC_CPU,
DIV_CPU0,
DIV_CPU1,
@@ -182,16 +191,16 @@ static unsigned long exynos5420_clk_regs[] __initdata = {
static int exynos5420_clk_suspend(void)
{
- samsung_clk_save(reg_base, exynos5420_save,
- ARRAY_SIZE(exynos5420_clk_regs));
+ samsung_clk_save(reg_base, exynos5x_save,
+ ARRAY_SIZE(exynos5x_clk_regs));
Don't you need to handle save and restore of 5800-specific registers as
well? You can see Exynos4 clock driver for an example of handling such
setup.
return 0;
}
static void exynos5420_clk_resume(void)
{
- samsung_clk_restore(reg_base, exynos5420_save,
- ARRAY_SIZE(exynos5420_clk_regs));
+ samsung_clk_restore(reg_base, exynos5x_save,
+ ARRAY_SIZE(exynos5x_clk_regs));
Ditto.
}
static struct syscore_ops exynos5420_clk_syscore_ops = {
@@ -201,9 +210,9 @@ static struct syscore_ops exynos5420_clk_syscore_ops = {
static void exynos5420_clk_sleep_init(void)
{
- exynos5420_save = samsung_clk_alloc_reg_dump(exynos5420_clk_regs,
- ARRAY_SIZE(exynos5420_clk_regs));
- if (!exynos5420_save) {
+ exynos5x_save = samsung_clk_alloc_reg_dump(exynos5x_clk_regs,
+ ARRAY_SIZE(exynos5x_clk_regs));
+ if (!exynos5x_save) {
pr_warn("%s: failed to allocate sleep save data, no sleep support!\n",
__func__);
return;
@@ -296,13 +305,29 @@ PNAME(hdmi_p) = { "dout_hdmi_pixel", "sclk_hdmiphy" };
PNAME(maudio0_p) = { "fin_pll", "maudio_clk", "sclk_dpll", "sclk_mpll",
"sclk_spll", "sclk_ipll", "sclk_epll", "sclk_rpll" };
+/* List of parents specific to exynos5800 */
+PNAME(mout_epll2_5800_p) = { "mout_sclk_epll", "ffactor_dout_epll2" };
+PNAME(mout_group1_5800_p) = { "mout_sclk_cpll", "mout_sclk_dpll",
+ "mout_sclk_mpll", "ffactor_dout_spll2" };
+PNAME(mout_group3_5800_p) = { "mout_sclk_cpll", "mout_sclk_dpll",
+ "mout_sclk_mpll", "ffactor_dout_spll2",
+ "mout_epll2" };
+PNAME(mout_group5_5800_p) = { "mout_sclk_cpll", "mout_sclk_dpll",
+ "mout_sclk_mpll", "mout_sclk_spll" };
+PNAME(mout_group6_5800_p) = { "mout_sclk_ipll", "mout_sclk_dpll",
+ "mout_sclk_mpll", "ffactor_dout_spll2" };
+PNAME(mout_group8_5800_p) = { "dout_aclk432_scaler", "dout_sclk_sw" };
+PNAME(mout_group9_5800_p) = { "dout_osc_div", "mout_sw_aclk432_scaler" };
+
/* fixed rate clocks generated outside the soc */
-static struct samsung_fixed_rate_clock exynos5420_fixed_rate_ext_clks[] __initdata = {
+static struct
+samsung_fixed_rate_clock exynos5x_fixed_rate_ext_clks[] __initdata = {
This is kind of strange way of wrapping long lines. I'd say that at
least struct should be in the same line as samsung_fixed_rate_clock, so
that could be at least kind of readable.
FRATE(CLK_FIN_PLL, "fin_pll", NULL, CLK_IS_ROOT, 0),
};
/* fixed rate clocks generated inside the soc */
-static struct samsung_fixed_rate_clock exynos5420_fixed_rate_clks[] __initdata = {
+static struct
+samsung_fixed_rate_clock exynos5x_fixed_rate_clks[] __initdata = {
Ditto.
FRATE(CLK_SCLK_HDMIPHY, "sclk_hdmiphy", NULL, CLK_IS_ROOT, 24000000),
FRATE(0, "sclk_pwi", NULL, CLK_IS_ROOT, 24000000),
FRATE(0, "sclk_usbh20", NULL, CLK_IS_ROOT, 48000000),
@@ -310,39 +335,88 @@ static struct samsung_fixed_rate_clock exynos5420_fixed_rate_clks[] __initdata =
FRATE(0, "sclk_usbh20_scan_clk", NULL, CLK_IS_ROOT, 480000000),
};
-static struct samsung_fixed_factor_clock exynos5420_fixed_factor_clks[] __initdata = {
+static struct
+samsung_fixed_factor_clock exynos5x_fixed_factor_clks[] __initdata = {
Ditto (and the same for other numerous instances of this below).
FFACTOR(0, "sclk_hsic_12m", "fin_pll", 1, 2, 0),
};
-static struct samsung_mux_clock exynos5420_mux_clks[] __initdata = {
- MUX(0, "mout_mspll_kfc", mspll_cpu_p, SRC_TOP7, 8, 2),
- MUX(0, "mout_mspll_cpu", mspll_cpu_p, SRC_TOP7, 12, 2),
- MUX(0, "mout_apll", apll_p, SRC_CPU, 0, 1),
- MUX(0, "mout_cpu", cpu_p, SRC_CPU, 16, 1),
- MUX(0, "mout_kpll", kpll_p, SRC_KFC, 0, 1),
- MUX(0, "mout_cpu_kfc", kfc_p, SRC_KFC, 16, 1),
+static struct
+samsung_fixed_factor_clock exynos5800_fixed_factor_clks[] __initdata = {
+ FFACTOR(0, "ffactor_dout_epll2", "mout_sclk_epll", 1, 2, 0),
+ FFACTOR(0, "ffactor_dout_spll2", "mout_sclk_spll", 1, 2, 0),
I don't think you need the "ffactor_" prefix in the name. I assume
"dout_epll2" and "dout_spll2" are the names listed in the datasheet. Is
that correct?
Best regards,
Tomasz
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